Patchwork [28/34] media: mx2_camera: remove mach/hardware.h inclusion

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Submitter Shawn Guo
Date Sept. 17, 2012, 5:34 a.m.
Message ID <1347860103-4141-29-git-send-email-shawn.guo@linaro.org>
Download mbox | patch
Permalink /patch/184306/
State New
Headers show

Comments

Shawn Guo - Sept. 17, 2012, 5:34 a.m.
It changes the driver to use platform_device_id rather than cpu_is_xxx
to determine the controller type, and updates the platform code
accordingly.

As the result, mach/hardware.h inclusion gets removed from the driver.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Cc: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Cc: linux-media@vger.kernel.org
---
 arch/arm/mach-imx/clk-imx25.c                   |    6 +-
 arch/arm/mach-imx/clk-imx27.c                   |    6 +-
 arch/arm/mach-imx/devices/devices-common.h      |    1 +
 arch/arm/mach-imx/devices/platform-mx2-camera.c |   12 +--
 drivers/media/video/mx2_camera.c                |   95 +++++++++++++++++------
 5 files changed, 85 insertions(+), 35 deletions(-)
Guennadi Liakhovetski - Sept. 17, 2012, 9:21 a.m.
On Mon, 17 Sep 2012, Shawn Guo wrote:

> It changes the driver to use platform_device_id rather than cpu_is_xxx
> to determine the controller type, and updates the platform code
> accordingly.
> 
> As the result, mach/hardware.h inclusion gets removed from the driver.
> 
> Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
> Cc: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
> Cc: linux-media@vger.kernel.org

Acked-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>

Thanks
Guennadi

> ---
>  arch/arm/mach-imx/clk-imx25.c                   |    6 +-
>  arch/arm/mach-imx/clk-imx27.c                   |    6 +-
>  arch/arm/mach-imx/devices/devices-common.h      |    1 +
>  arch/arm/mach-imx/devices/platform-mx2-camera.c |   12 +--
>  drivers/media/video/mx2_camera.c                |   95 +++++++++++++++++------
>  5 files changed, 85 insertions(+), 35 deletions(-)
> 
> diff --git a/arch/arm/mach-imx/clk-imx25.c b/arch/arm/mach-imx/clk-imx25.c
> index 1aea073..71fe521 100644
> --- a/arch/arm/mach-imx/clk-imx25.c
> +++ b/arch/arm/mach-imx/clk-imx25.c
> @@ -231,9 +231,9 @@ int __init mx25_clocks_init(void)
>  	clk_register_clkdev(clk[esdhc2_ipg_per], "per", "sdhci-esdhc-imx25.1");
>  	clk_register_clkdev(clk[esdhc2_ipg], "ipg", "sdhci-esdhc-imx25.1");
>  	clk_register_clkdev(clk[esdhc2_ahb], "ahb", "sdhci-esdhc-imx25.1");
> -	clk_register_clkdev(clk[csi_ipg_per], "per", "mx2-camera.0");
> -	clk_register_clkdev(clk[csi_ipg], "ipg", "mx2-camera.0");
> -	clk_register_clkdev(clk[csi_ahb], "ahb", "mx2-camera.0");
> +	clk_register_clkdev(clk[csi_ipg_per], "per", "imx25-camera.0");
> +	clk_register_clkdev(clk[csi_ipg], "ipg", "imx25-camera.0");
> +	clk_register_clkdev(clk[csi_ahb], "ahb", "imx25-camera.0");
>  	clk_register_clkdev(clk[dummy], "audmux", NULL);
>  	clk_register_clkdev(clk[can1_ipg], NULL, "flexcan.0");
>  	clk_register_clkdev(clk[can2_ipg], NULL, "flexcan.1");
> diff --git a/arch/arm/mach-imx/clk-imx27.c b/arch/arm/mach-imx/clk-imx27.c
> index 5ff5cf0..e26de52 100644
> --- a/arch/arm/mach-imx/clk-imx27.c
> +++ b/arch/arm/mach-imx/clk-imx27.c
> @@ -224,7 +224,7 @@ int __init mx27_clocks_init(unsigned long fref)
>  	clk_register_clkdev(clk[per3_gate], "per", "imx-fb.0");
>  	clk_register_clkdev(clk[lcdc_ipg_gate], "ipg", "imx-fb.0");
>  	clk_register_clkdev(clk[lcdc_ahb_gate], "ahb", "imx-fb.0");
> -	clk_register_clkdev(clk[csi_ahb_gate], "ahb", "mx2-camera.0");
> +	clk_register_clkdev(clk[csi_ahb_gate], "ahb", "imx27-camera.0");
>  	clk_register_clkdev(clk[usb_div], "per", "fsl-usb2-udc");
>  	clk_register_clkdev(clk[usb_ipg_gate], "ipg", "fsl-usb2-udc");
>  	clk_register_clkdev(clk[usb_ahb_gate], "ahb", "fsl-usb2-udc");
> @@ -251,8 +251,8 @@ int __init mx27_clocks_init(unsigned long fref)
>  	clk_register_clkdev(clk[i2c2_ipg_gate], NULL, "imx21-i2c.1");
>  	clk_register_clkdev(clk[owire_ipg_gate], NULL, "mxc_w1.0");
>  	clk_register_clkdev(clk[kpp_ipg_gate], NULL, "imx-keypad");
> -	clk_register_clkdev(clk[emma_ahb_gate], "emma-ahb", "mx2-camera.0");
> -	clk_register_clkdev(clk[emma_ipg_gate], "emma-ipg", "mx2-camera.0");
> +	clk_register_clkdev(clk[emma_ahb_gate], "emma-ahb", "imx27-camera.0");
> +	clk_register_clkdev(clk[emma_ipg_gate], "emma-ipg", "imx27-camera.0");
>  	clk_register_clkdev(clk[emma_ahb_gate], "ahb", "m2m-emmaprp.0");
>  	clk_register_clkdev(clk[emma_ipg_gate], "ipg", "m2m-emmaprp.0");
>  	clk_register_clkdev(clk[iim_ipg_gate], "iim", NULL);
> diff --git a/arch/arm/mach-imx/devices/devices-common.h b/arch/arm/mach-imx/devices/devices-common.h
> index 7f2698c..8112a1a 100644
> --- a/arch/arm/mach-imx/devices/devices-common.h
> +++ b/arch/arm/mach-imx/devices/devices-common.h
> @@ -202,6 +202,7 @@ struct platform_device *__init imx_add_mx3_sdc_fb(
>  
>  #include <linux/platform_data/camera-mx2.h>
>  struct imx_mx2_camera_data {
> +	const char *devid;
>  	resource_size_t iobasecsi;
>  	resource_size_t iosizecsi;
>  	resource_size_t irqcsi;
> diff --git a/arch/arm/mach-imx/devices/platform-mx2-camera.c b/arch/arm/mach-imx/devices/platform-mx2-camera.c
> index 9ad5b2d..b88877d 100644
> --- a/arch/arm/mach-imx/devices/platform-mx2-camera.c
> +++ b/arch/arm/mach-imx/devices/platform-mx2-camera.c
> @@ -9,14 +9,16 @@
>  #include <mach/hardware.h>
>  #include "devices-common.h"
>  
> -#define imx_mx2_camera_data_entry_single(soc)				\
> +#define imx_mx2_camera_data_entry_single(soc, _devid)			\
>  	{								\
> +		.devid = _devid,					\
>  		.iobasecsi = soc ## _CSI_BASE_ADDR,			\
>  		.iosizecsi = SZ_4K,					\
>  		.irqcsi = soc ## _INT_CSI,				\
>  	}
> -#define imx_mx2_camera_data_entry_single_emma(soc)			\
> +#define imx_mx2_camera_data_entry_single_emma(soc, _devid)		\
>  	{								\
> +		.devid = _devid,					\
>  		.iobasecsi = soc ## _CSI_BASE_ADDR,			\
>  		.iosizecsi = SZ_32,					\
>  		.irqcsi = soc ## _INT_CSI,				\
> @@ -27,12 +29,12 @@
>  
>  #ifdef CONFIG_SOC_IMX25
>  const struct imx_mx2_camera_data imx25_mx2_camera_data __initconst =
> -	imx_mx2_camera_data_entry_single(MX25);
> +	imx_mx2_camera_data_entry_single(MX25, "imx25-camera");
>  #endif /* ifdef CONFIG_SOC_IMX25 */
>  
>  #ifdef CONFIG_SOC_IMX27
>  const struct imx_mx2_camera_data imx27_mx2_camera_data __initconst =
> -	imx_mx2_camera_data_entry_single_emma(MX27);
> +	imx_mx2_camera_data_entry_single_emma(MX27, "imx27-camera");
>  #endif /* ifdef CONFIG_SOC_IMX27 */
>  
>  struct platform_device *__init imx_add_mx2_camera(
> @@ -58,7 +60,7 @@ struct platform_device *__init imx_add_mx2_camera(
>  			.flags = IORESOURCE_IRQ,
>  		},
>  	};
> -	return imx_add_platform_device_dmamask("mx2-camera", 0,
> +	return imx_add_platform_device_dmamask(data->devid, 0,
>  			res, data->iobaseemmaprp ? 4 : 2,
>  			pdata, sizeof(*pdata), DMA_BIT_MASK(32));
>  }
> diff --git a/drivers/media/video/mx2_camera.c b/drivers/media/video/mx2_camera.c
> index fe4c76c..cde3374 100644
> --- a/drivers/media/video/mx2_camera.c
> +++ b/drivers/media/video/mx2_camera.c
> @@ -41,7 +41,6 @@
>  #include <linux/videodev2.h>
>  
>  #include <linux/platform_data/camera-mx2.h>
> -#include <mach/hardware.h>
>  
>  #include <asm/dma.h>
>  
> @@ -121,11 +120,13 @@
>  
>  #define CSICR1			0x00
>  #define CSICR2			0x04
> -#define CSISR			(cpu_is_mx27() ? 0x08 : 0x18)
> +#define CSISR_IMX25		0x18
> +#define CSISR_IMX27		0x08
>  #define CSISTATFIFO		0x0c
>  #define CSIRFIFO		0x10
>  #define CSIRXCNT		0x14
> -#define CSICR3			(cpu_is_mx27() ? 0x1C : 0x08)
> +#define CSICR3_IMX25		0x08
> +#define CSICR3_IMX27		0x1c
>  #define CSIDMASA_STATFIFO	0x20
>  #define CSIDMATA_STATFIFO	0x24
>  #define CSIDMASA_FB1		0x28
> @@ -268,6 +269,11 @@ struct mx2_buffer {
>  	struct mx2_buf_internal		internal;
>  };
>  
> +enum mx2_camera_type {
> +	IMX25_CAMERA,
> +	IMX27_CAMERA,
> +};
> +
>  struct mx2_camera_dev {
>  	struct device		*dev;
>  	struct soc_camera_host	soc_host;
> @@ -291,6 +297,9 @@ struct mx2_camera_dev {
>  	struct mx2_buffer	*fb2_active;
>  
>  	u32			csicr1;
> +	u32			reg_csisr;
> +	u32			reg_csicr3;
> +	enum mx2_camera_type	devtype;
>  
>  	struct mx2_buf_internal buf_discard[2];
>  	void			*discard_buffer;
> @@ -303,6 +312,29 @@ struct mx2_camera_dev {
>  	struct vb2_alloc_ctx	*alloc_ctx;
>  };
>  
> +static struct platform_device_id mx2_camera_devtype[] = {
> +	{
> +		.name = "imx25-camera",
> +		.driver_data = IMX25_CAMERA,
> +	}, {
> +		.name = "imx27-camera",
> +		.driver_data = IMX27_CAMERA,
> +	}, {
> +		/* sentinel */
> +	}
> +};
> +MODULE_DEVICE_TABLE(platform, mx2_camera_devtype);
> +
> +static inline int is_imx25_camera(struct mx2_camera_dev *pcdev)
> +{
> +	return pcdev->devtype == IMX25_CAMERA;
> +}
> +
> +static inline int is_imx27_camera(struct mx2_camera_dev *pcdev)
> +{
> +	return pcdev->devtype == IMX27_CAMERA;
> +}
> +
>  static struct mx2_buffer *mx2_ibuf_to_buf(struct mx2_buf_internal *int_buf)
>  {
>  	return container_of(int_buf, struct mx2_buffer, internal);
> @@ -406,9 +438,9 @@ static void mx2_camera_deactivate(struct mx2_camera_dev *pcdev)
>  
>  	clk_disable_unprepare(pcdev->clk_csi);
>  	writel(0, pcdev->base_csi + CSICR1);
> -	if (cpu_is_mx27()) {
> +	if (is_imx27_camera(pcdev)) {
>  		writel(0, pcdev->base_emma + PRP_CNTL);
> -	} else if (cpu_is_mx25()) {
> +	} else if (is_imx25_camera(pcdev)) {
>  		spin_lock_irqsave(&pcdev->lock, flags);
>  		pcdev->fb1_active = NULL;
>  		pcdev->fb2_active = NULL;
> @@ -438,7 +470,7 @@ static int mx2_camera_add_device(struct soc_camera_device *icd)
>  
>  	csicr1 = CSICR1_MCLKEN;
>  
> -	if (cpu_is_mx27())
> +	if (is_imx27_camera(pcdev))
>  		csicr1 |= CSICR1_PRP_IF_EN | CSICR1_FCC |
>  			CSICR1_RXFF_LEVEL(0);
>  
> @@ -514,7 +546,7 @@ out:
>  static irqreturn_t mx25_camera_irq(int irq_csi, void *data)
>  {
>  	struct mx2_camera_dev *pcdev = data;
> -	u32 status = readl(pcdev->base_csi + CSISR);
> +	u32 status = readl(pcdev->base_csi + pcdev->reg_csisr);
>  
>  	if (status & CSISR_DMA_TSF_FB1_INT)
>  		mx25_camera_frame_done(pcdev, 1, MX2_STATE_DONE);
> @@ -523,7 +555,7 @@ static irqreturn_t mx25_camera_irq(int irq_csi, void *data)
>  
>  	/* FIXME: handle CSISR_RFF_OR_INT */
>  
> -	writel(status, pcdev->base_csi + CSISR);
> +	writel(status, pcdev->base_csi + pcdev->reg_csisr);
>  
>  	return IRQ_HANDLED;
>  }
> @@ -608,7 +640,7 @@ static void mx2_videobuf_queue(struct vb2_buffer *vb)
>  	buf->state = MX2_STATE_QUEUED;
>  	list_add_tail(&buf->internal.queue, &pcdev->capture);
>  
> -	if (cpu_is_mx25()) {
> +	if (is_imx25_camera(pcdev)) {
>  		u32 csicr3, dma_inten = 0;
>  
>  		if (pcdev->fb1_active == NULL) {
> @@ -627,20 +659,20 @@ static void mx2_videobuf_queue(struct vb2_buffer *vb)
>  			list_del(&buf->internal.queue);
>  			buf->state = MX2_STATE_ACTIVE;
>  
> -			csicr3 = readl(pcdev->base_csi + CSICR3);
> +			csicr3 = readl(pcdev->base_csi + pcdev->reg_csicr3);
>  
>  			/* Reflash DMA */
>  			writel(csicr3 | CSICR3_DMA_REFLASH_RFF,
> -					pcdev->base_csi + CSICR3);
> +					pcdev->base_csi + pcdev->reg_csicr3);
>  
>  			/* clear & enable interrupts */
> -			writel(dma_inten, pcdev->base_csi + CSISR);
> +			writel(dma_inten, pcdev->base_csi + pcdev->reg_csisr);
>  			pcdev->csicr1 |= dma_inten;
>  			writel(pcdev->csicr1, pcdev->base_csi + CSICR1);
>  
>  			/* enable DMA */
>  			csicr3 |= CSICR3_DMA_REQ_EN_RFF | CSICR3_RXFF_LEVEL(1);
> -			writel(csicr3, pcdev->base_csi + CSICR3);
> +			writel(csicr3, pcdev->base_csi + pcdev->reg_csicr3);
>  		}
>  	}
>  
> @@ -684,7 +716,7 @@ static void mx2_videobuf_release(struct vb2_buffer *vb)
>  	 */
>  
>  	spin_lock_irqsave(&pcdev->lock, flags);
> -	if (cpu_is_mx25() && buf->state == MX2_STATE_ACTIVE) {
> +	if (is_imx25_camera(pcdev) && buf->state == MX2_STATE_ACTIVE) {
>  		if (pcdev->fb1_active == buf) {
>  			pcdev->csicr1 &= ~CSICR1_FB1_DMA_INTEN;
>  			writel(0, pcdev->base_csi + CSIDMASA_FB1);
> @@ -807,7 +839,7 @@ static int mx2_start_streaming(struct vb2_queue *q, unsigned int count)
>  	unsigned long phys;
>  	int bytesperline;
>  
> -	if (cpu_is_mx27()) {
> +	if (is_imx27_camera(pcdev)) {
>  		unsigned long flags;
>  		if (count < 2)
>  			return -EINVAL;
> @@ -902,7 +934,7 @@ static int mx2_stop_streaming(struct vb2_queue *q)
>  	void *b;
>  	u32 cntl;
>  
> -	if (cpu_is_mx27()) {
> +	if (is_imx27_camera(pcdev)) {
>  		spin_lock_irqsave(&pcdev->lock, flags);
>  
>  		cntl = readl(pcdev->base_emma + PRP_CNTL);
> @@ -1054,11 +1086,11 @@ static int mx2_camera_set_bus_param(struct soc_camera_device *icd)
>  	if (bytesperline < 0)
>  		return bytesperline;
>  
> -	if (cpu_is_mx27()) {
> +	if (is_imx27_camera(pcdev)) {
>  		ret = mx27_camera_emma_prp_reset(pcdev);
>  		if (ret)
>  			return ret;
> -	} else if (cpu_is_mx25()) {
> +	} else if (is_imx25_camera(pcdev)) {
>  		writel((bytesperline * icd->user_height) >> 2,
>  				pcdev->base_csi + CSIRXCNT);
>  		writel((bytesperline << 16) | icd->user_height,
> @@ -1351,7 +1383,7 @@ static int mx2_camera_try_fmt(struct soc_camera_device *icd,
>  	/* FIXME: implement MX27 limits */
>  
>  	/* limit to MX25 hardware capabilities */
> -	if (cpu_is_mx25()) {
> +	if (is_imx25_camera(pcdev)) {
>  		if (xlate->host_fmt->bits_per_sample <= 8)
>  			width_limit = 0xffff * 4;
>  		else
> @@ -1685,6 +1717,20 @@ static int __devinit mx2_camera_probe(struct platform_device *pdev)
>  		goto exit;
>  	}
>  
> +	pcdev->devtype = pdev->id_entry->driver_data;
> +	switch (pcdev->devtype) {
> +	case IMX25_CAMERA:
> +		pcdev->reg_csisr = CSISR_IMX25;
> +		pcdev->reg_csicr3 = CSICR3_IMX25;
> +		break;
> +	case IMX27_CAMERA:
> +		pcdev->reg_csisr = CSISR_IMX27;
> +		pcdev->reg_csicr3 = CSICR3_IMX27;
> +		break;
> +	default:
> +		break;
> +	}
> +
>  	pcdev->clk_csi = devm_clk_get(&pdev->dev, "ahb");
>  	if (IS_ERR(pcdev->clk_csi)) {
>  		dev_err(&pdev->dev, "Could not get csi clock\n");
> @@ -1722,7 +1768,7 @@ static int __devinit mx2_camera_probe(struct platform_device *pdev)
>  	pcdev->dev = &pdev->dev;
>  	platform_set_drvdata(pdev, pcdev);
>  
> -	if (cpu_is_mx25()) {
> +	if (is_imx25_camera(pcdev)) {
>  		err = devm_request_irq(&pdev->dev, irq_csi, mx25_camera_irq, 0,
>  				       MX2_CAM_DRV_NAME, pcdev);
>  		if (err) {
> @@ -1731,7 +1777,7 @@ static int __devinit mx2_camera_probe(struct platform_device *pdev)
>  		}
>  	}
>  
> -	if (cpu_is_mx27()) {
> +	if (is_imx27_camera(pcdev)) {
>  		err = mx27_camera_emma_init(pdev);
>  		if (err)
>  			goto exit;
> @@ -1742,7 +1788,7 @@ static int __devinit mx2_camera_probe(struct platform_device *pdev)
>  	pcdev->soc_host.priv		= pcdev;
>  	pcdev->soc_host.v4l2_dev.dev	= &pdev->dev;
>  	pcdev->soc_host.nr		= pdev->id;
> -	if (cpu_is_mx25())
> +	if (is_imx25_camera(pcdev))
>  		pcdev->soc_host.capabilities = SOCAM_HOST_CAP_STRIDE;
>  
>  	pcdev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
> @@ -1762,7 +1808,7 @@ static int __devinit mx2_camera_probe(struct platform_device *pdev)
>  exit_free_emma:
>  	vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx);
>  eallocctx:
> -	if (cpu_is_mx27()) {
> +	if (is_imx27_camera(pcdev)) {
>  		clk_disable_unprepare(pcdev->clk_emma_ipg);
>  		clk_disable_unprepare(pcdev->clk_emma_ahb);
>  	}
> @@ -1780,7 +1826,7 @@ static int __devexit mx2_camera_remove(struct platform_device *pdev)
>  
>  	vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx);
>  
> -	if (cpu_is_mx27()) {
> +	if (is_imx27_camera(pcdev)) {
>  		clk_disable_unprepare(pcdev->clk_emma_ipg);
>  		clk_disable_unprepare(pcdev->clk_emma_ahb);
>  	}
> @@ -1794,6 +1840,7 @@ static struct platform_driver mx2_camera_driver = {
>  	.driver 	= {
>  		.name	= MX2_CAM_DRV_NAME,
>  	},
> +	.id_table	= mx2_camera_devtype,
>  	.remove		= __devexit_p(mx2_camera_remove),
>  };
>  
> -- 
> 1.7.9.5
> 

---
Guennadi Liakhovetski, Ph.D.
Freelance Open-Source Software Developer
http://www.open-technology.de/
Javier Martin - Sept. 17, 2012, 1:43 p.m.
Hi Shawn,

On 17 September 2012 11:21, Guennadi Liakhovetski <g.liakhovetski@gmx.de> wrote:
> On Mon, 17 Sep 2012, Shawn Guo wrote:
>
>> It changes the driver to use platform_device_id rather than cpu_is_xxx
>> to determine the controller type, and updates the platform code
>> accordingly.
>>
>> As the result, mach/hardware.h inclusion gets removed from the driver.
>>
>> Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
>> Cc: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
>> Cc: linux-media@vger.kernel.org
>
> Acked-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>

i.MX25 support is broken and is scheduled for removal.

I think we should not keep on trying to maintain it. Couldn't we just
drop it? It only makes maintenance tasks more difficult.

> Thanks
> Guennadi
>
>> ---
>>  arch/arm/mach-imx/clk-imx25.c                   |    6 +-
>>  arch/arm/mach-imx/clk-imx27.c                   |    6 +-
>>  arch/arm/mach-imx/devices/devices-common.h      |    1 +
>>  arch/arm/mach-imx/devices/platform-mx2-camera.c |   12 +--
>>  drivers/media/video/mx2_camera.c                |   95 +++++++++++++++++------
>>  5 files changed, 85 insertions(+), 35 deletions(-)
>>
>> diff --git a/arch/arm/mach-imx/clk-imx25.c b/arch/arm/mach-imx/clk-imx25.c
>> index 1aea073..71fe521 100644
>> --- a/arch/arm/mach-imx/clk-imx25.c
>> +++ b/arch/arm/mach-imx/clk-imx25.c
>> @@ -231,9 +231,9 @@ int __init mx25_clocks_init(void)
>>       clk_register_clkdev(clk[esdhc2_ipg_per], "per", "sdhci-esdhc-imx25.1");
>>       clk_register_clkdev(clk[esdhc2_ipg], "ipg", "sdhci-esdhc-imx25.1");
>>       clk_register_clkdev(clk[esdhc2_ahb], "ahb", "sdhci-esdhc-imx25.1");
>> -     clk_register_clkdev(clk[csi_ipg_per], "per", "mx2-camera.0");
>> -     clk_register_clkdev(clk[csi_ipg], "ipg", "mx2-camera.0");
>> -     clk_register_clkdev(clk[csi_ahb], "ahb", "mx2-camera.0");
>> +     clk_register_clkdev(clk[csi_ipg_per], "per", "imx25-camera.0");
>> +     clk_register_clkdev(clk[csi_ipg], "ipg", "imx25-camera.0");
>> +     clk_register_clkdev(clk[csi_ahb], "ahb", "imx25-camera.0");
>>       clk_register_clkdev(clk[dummy], "audmux", NULL);
>>       clk_register_clkdev(clk[can1_ipg], NULL, "flexcan.0");
>>       clk_register_clkdev(clk[can2_ipg], NULL, "flexcan.1");
>> diff --git a/arch/arm/mach-imx/clk-imx27.c b/arch/arm/mach-imx/clk-imx27.c
>> index 5ff5cf0..e26de52 100644
>> --- a/arch/arm/mach-imx/clk-imx27.c
>> +++ b/arch/arm/mach-imx/clk-imx27.c
>> @@ -224,7 +224,7 @@ int __init mx27_clocks_init(unsigned long fref)
>>       clk_register_clkdev(clk[per3_gate], "per", "imx-fb.0");
>>       clk_register_clkdev(clk[lcdc_ipg_gate], "ipg", "imx-fb.0");
>>       clk_register_clkdev(clk[lcdc_ahb_gate], "ahb", "imx-fb.0");
>> -     clk_register_clkdev(clk[csi_ahb_gate], "ahb", "mx2-camera.0");
>> +     clk_register_clkdev(clk[csi_ahb_gate], "ahb", "imx27-camera.0");
>>       clk_register_clkdev(clk[usb_div], "per", "fsl-usb2-udc");
>>       clk_register_clkdev(clk[usb_ipg_gate], "ipg", "fsl-usb2-udc");
>>       clk_register_clkdev(clk[usb_ahb_gate], "ahb", "fsl-usb2-udc");
>> @@ -251,8 +251,8 @@ int __init mx27_clocks_init(unsigned long fref)
>>       clk_register_clkdev(clk[i2c2_ipg_gate], NULL, "imx21-i2c.1");
>>       clk_register_clkdev(clk[owire_ipg_gate], NULL, "mxc_w1.0");
>>       clk_register_clkdev(clk[kpp_ipg_gate], NULL, "imx-keypad");
>> -     clk_register_clkdev(clk[emma_ahb_gate], "emma-ahb", "mx2-camera.0");
>> -     clk_register_clkdev(clk[emma_ipg_gate], "emma-ipg", "mx2-camera.0");
>> +     clk_register_clkdev(clk[emma_ahb_gate], "emma-ahb", "imx27-camera.0");
>> +     clk_register_clkdev(clk[emma_ipg_gate], "emma-ipg", "imx27-camera.0");
>>       clk_register_clkdev(clk[emma_ahb_gate], "ahb", "m2m-emmaprp.0");
>>       clk_register_clkdev(clk[emma_ipg_gate], "ipg", "m2m-emmaprp.0");
>>       clk_register_clkdev(clk[iim_ipg_gate], "iim", NULL);
>> diff --git a/arch/arm/mach-imx/devices/devices-common.h b/arch/arm/mach-imx/devices/devices-common.h
>> index 7f2698c..8112a1a 100644
>> --- a/arch/arm/mach-imx/devices/devices-common.h
>> +++ b/arch/arm/mach-imx/devices/devices-common.h
>> @@ -202,6 +202,7 @@ struct platform_device *__init imx_add_mx3_sdc_fb(
>>
>>  #include <linux/platform_data/camera-mx2.h>
>>  struct imx_mx2_camera_data {
>> +     const char *devid;
>>       resource_size_t iobasecsi;
>>       resource_size_t iosizecsi;
>>       resource_size_t irqcsi;
>> diff --git a/arch/arm/mach-imx/devices/platform-mx2-camera.c b/arch/arm/mach-imx/devices/platform-mx2-camera.c
>> index 9ad5b2d..b88877d 100644
>> --- a/arch/arm/mach-imx/devices/platform-mx2-camera.c
>> +++ b/arch/arm/mach-imx/devices/platform-mx2-camera.c
>> @@ -9,14 +9,16 @@
>>  #include <mach/hardware.h>
>>  #include "devices-common.h"
>>
>> -#define imx_mx2_camera_data_entry_single(soc)                                \
>> +#define imx_mx2_camera_data_entry_single(soc, _devid)                        \
>>       {                                                               \
>> +             .devid = _devid,                                        \
>>               .iobasecsi = soc ## _CSI_BASE_ADDR,                     \
>>               .iosizecsi = SZ_4K,                                     \
>>               .irqcsi = soc ## _INT_CSI,                              \
>>       }
>> -#define imx_mx2_camera_data_entry_single_emma(soc)                   \
>> +#define imx_mx2_camera_data_entry_single_emma(soc, _devid)           \
>>       {                                                               \
>> +             .devid = _devid,                                        \
>>               .iobasecsi = soc ## _CSI_BASE_ADDR,                     \
>>               .iosizecsi = SZ_32,                                     \
>>               .irqcsi = soc ## _INT_CSI,                              \
>> @@ -27,12 +29,12 @@
>>
>>  #ifdef CONFIG_SOC_IMX25
>>  const struct imx_mx2_camera_data imx25_mx2_camera_data __initconst =
>> -     imx_mx2_camera_data_entry_single(MX25);
>> +     imx_mx2_camera_data_entry_single(MX25, "imx25-camera");
>>  #endif /* ifdef CONFIG_SOC_IMX25 */
>>
>>  #ifdef CONFIG_SOC_IMX27
>>  const struct imx_mx2_camera_data imx27_mx2_camera_data __initconst =
>> -     imx_mx2_camera_data_entry_single_emma(MX27);
>> +     imx_mx2_camera_data_entry_single_emma(MX27, "imx27-camera");
>>  #endif /* ifdef CONFIG_SOC_IMX27 */
>>
>>  struct platform_device *__init imx_add_mx2_camera(
>> @@ -58,7 +60,7 @@ struct platform_device *__init imx_add_mx2_camera(
>>                       .flags = IORESOURCE_IRQ,
>>               },
>>       };
>> -     return imx_add_platform_device_dmamask("mx2-camera", 0,
>> +     return imx_add_platform_device_dmamask(data->devid, 0,
>>                       res, data->iobaseemmaprp ? 4 : 2,
>>                       pdata, sizeof(*pdata), DMA_BIT_MASK(32));
>>  }
>> diff --git a/drivers/media/video/mx2_camera.c b/drivers/media/video/mx2_camera.c
>> index fe4c76c..cde3374 100644
>> --- a/drivers/media/video/mx2_camera.c
>> +++ b/drivers/media/video/mx2_camera.c
>> @@ -41,7 +41,6 @@
>>  #include <linux/videodev2.h>
>>
>>  #include <linux/platform_data/camera-mx2.h>
>> -#include <mach/hardware.h>
>>
>>  #include <asm/dma.h>
>>
>> @@ -121,11 +120,13 @@
>>
>>  #define CSICR1                       0x00
>>  #define CSICR2                       0x04
>> -#define CSISR                        (cpu_is_mx27() ? 0x08 : 0x18)
>> +#define CSISR_IMX25          0x18
>> +#define CSISR_IMX27          0x08
>>  #define CSISTATFIFO          0x0c
>>  #define CSIRFIFO             0x10
>>  #define CSIRXCNT             0x14
>> -#define CSICR3                       (cpu_is_mx27() ? 0x1C : 0x08)
>> +#define CSICR3_IMX25         0x08
>> +#define CSICR3_IMX27         0x1c
>>  #define CSIDMASA_STATFIFO    0x20
>>  #define CSIDMATA_STATFIFO    0x24
>>  #define CSIDMASA_FB1         0x28
>> @@ -268,6 +269,11 @@ struct mx2_buffer {
>>       struct mx2_buf_internal         internal;
>>  };
>>
>> +enum mx2_camera_type {
>> +     IMX25_CAMERA,
>> +     IMX27_CAMERA,
>> +};
>> +
>>  struct mx2_camera_dev {
>>       struct device           *dev;
>>       struct soc_camera_host  soc_host;
>> @@ -291,6 +297,9 @@ struct mx2_camera_dev {
>>       struct mx2_buffer       *fb2_active;
>>
>>       u32                     csicr1;
>> +     u32                     reg_csisr;
>> +     u32                     reg_csicr3;
>> +     enum mx2_camera_type    devtype;
>>
>>       struct mx2_buf_internal buf_discard[2];
>>       void                    *discard_buffer;
>> @@ -303,6 +312,29 @@ struct mx2_camera_dev {
>>       struct vb2_alloc_ctx    *alloc_ctx;
>>  };
>>
>> +static struct platform_device_id mx2_camera_devtype[] = {
>> +     {
>> +             .name = "imx25-camera",
>> +             .driver_data = IMX25_CAMERA,
>> +     }, {
>> +             .name = "imx27-camera",
>> +             .driver_data = IMX27_CAMERA,
>> +     }, {
>> +             /* sentinel */
>> +     }
>> +};
>> +MODULE_DEVICE_TABLE(platform, mx2_camera_devtype);
>> +
>> +static inline int is_imx25_camera(struct mx2_camera_dev *pcdev)
>> +{
>> +     return pcdev->devtype == IMX25_CAMERA;
>> +}
>> +
>> +static inline int is_imx27_camera(struct mx2_camera_dev *pcdev)
>> +{
>> +     return pcdev->devtype == IMX27_CAMERA;
>> +}
>> +
>>  static struct mx2_buffer *mx2_ibuf_to_buf(struct mx2_buf_internal *int_buf)
>>  {
>>       return container_of(int_buf, struct mx2_buffer, internal);
>> @@ -406,9 +438,9 @@ static void mx2_camera_deactivate(struct mx2_camera_dev *pcdev)
>>
>>       clk_disable_unprepare(pcdev->clk_csi);
>>       writel(0, pcdev->base_csi + CSICR1);
>> -     if (cpu_is_mx27()) {
>> +     if (is_imx27_camera(pcdev)) {
>>               writel(0, pcdev->base_emma + PRP_CNTL);
>> -     } else if (cpu_is_mx25()) {
>> +     } else if (is_imx25_camera(pcdev)) {
>>               spin_lock_irqsave(&pcdev->lock, flags);
>>               pcdev->fb1_active = NULL;
>>               pcdev->fb2_active = NULL;
>> @@ -438,7 +470,7 @@ static int mx2_camera_add_device(struct soc_camera_device *icd)
>>
>>       csicr1 = CSICR1_MCLKEN;
>>
>> -     if (cpu_is_mx27())
>> +     if (is_imx27_camera(pcdev))
>>               csicr1 |= CSICR1_PRP_IF_EN | CSICR1_FCC |
>>                       CSICR1_RXFF_LEVEL(0);
>>
>> @@ -514,7 +546,7 @@ out:
>>  static irqreturn_t mx25_camera_irq(int irq_csi, void *data)
>>  {
>>       struct mx2_camera_dev *pcdev = data;
>> -     u32 status = readl(pcdev->base_csi + CSISR);
>> +     u32 status = readl(pcdev->base_csi + pcdev->reg_csisr);
>>
>>       if (status & CSISR_DMA_TSF_FB1_INT)
>>               mx25_camera_frame_done(pcdev, 1, MX2_STATE_DONE);
>> @@ -523,7 +555,7 @@ static irqreturn_t mx25_camera_irq(int irq_csi, void *data)
>>
>>       /* FIXME: handle CSISR_RFF_OR_INT */
>>
>> -     writel(status, pcdev->base_csi + CSISR);
>> +     writel(status, pcdev->base_csi + pcdev->reg_csisr);
>>
>>       return IRQ_HANDLED;
>>  }
>> @@ -608,7 +640,7 @@ static void mx2_videobuf_queue(struct vb2_buffer *vb)
>>       buf->state = MX2_STATE_QUEUED;
>>       list_add_tail(&buf->internal.queue, &pcdev->capture);
>>
>> -     if (cpu_is_mx25()) {
>> +     if (is_imx25_camera(pcdev)) {
>>               u32 csicr3, dma_inten = 0;
>>
>>               if (pcdev->fb1_active == NULL) {
>> @@ -627,20 +659,20 @@ static void mx2_videobuf_queue(struct vb2_buffer *vb)
>>                       list_del(&buf->internal.queue);
>>                       buf->state = MX2_STATE_ACTIVE;
>>
>> -                     csicr3 = readl(pcdev->base_csi + CSICR3);
>> +                     csicr3 = readl(pcdev->base_csi + pcdev->reg_csicr3);
>>
>>                       /* Reflash DMA */
>>                       writel(csicr3 | CSICR3_DMA_REFLASH_RFF,
>> -                                     pcdev->base_csi + CSICR3);
>> +                                     pcdev->base_csi + pcdev->reg_csicr3);
>>
>>                       /* clear & enable interrupts */
>> -                     writel(dma_inten, pcdev->base_csi + CSISR);
>> +                     writel(dma_inten, pcdev->base_csi + pcdev->reg_csisr);
>>                       pcdev->csicr1 |= dma_inten;
>>                       writel(pcdev->csicr1, pcdev->base_csi + CSICR1);
>>
>>                       /* enable DMA */
>>                       csicr3 |= CSICR3_DMA_REQ_EN_RFF | CSICR3_RXFF_LEVEL(1);
>> -                     writel(csicr3, pcdev->base_csi + CSICR3);
>> +                     writel(csicr3, pcdev->base_csi + pcdev->reg_csicr3);
>>               }
>>       }
>>
>> @@ -684,7 +716,7 @@ static void mx2_videobuf_release(struct vb2_buffer *vb)
>>        */
>>
>>       spin_lock_irqsave(&pcdev->lock, flags);
>> -     if (cpu_is_mx25() && buf->state == MX2_STATE_ACTIVE) {
>> +     if (is_imx25_camera(pcdev) && buf->state == MX2_STATE_ACTIVE) {
>>               if (pcdev->fb1_active == buf) {
>>                       pcdev->csicr1 &= ~CSICR1_FB1_DMA_INTEN;
>>                       writel(0, pcdev->base_csi + CSIDMASA_FB1);
>> @@ -807,7 +839,7 @@ static int mx2_start_streaming(struct vb2_queue *q, unsigned int count)
>>       unsigned long phys;
>>       int bytesperline;
>>
>> -     if (cpu_is_mx27()) {
>> +     if (is_imx27_camera(pcdev)) {
>>               unsigned long flags;
>>               if (count < 2)
>>                       return -EINVAL;
>> @@ -902,7 +934,7 @@ static int mx2_stop_streaming(struct vb2_queue *q)
>>       void *b;
>>       u32 cntl;
>>
>> -     if (cpu_is_mx27()) {
>> +     if (is_imx27_camera(pcdev)) {
>>               spin_lock_irqsave(&pcdev->lock, flags);
>>
>>               cntl = readl(pcdev->base_emma + PRP_CNTL);
>> @@ -1054,11 +1086,11 @@ static int mx2_camera_set_bus_param(struct soc_camera_device *icd)
>>       if (bytesperline < 0)
>>               return bytesperline;
>>
>> -     if (cpu_is_mx27()) {
>> +     if (is_imx27_camera(pcdev)) {
>>               ret = mx27_camera_emma_prp_reset(pcdev);
>>               if (ret)
>>                       return ret;
>> -     } else if (cpu_is_mx25()) {
>> +     } else if (is_imx25_camera(pcdev)) {
>>               writel((bytesperline * icd->user_height) >> 2,
>>                               pcdev->base_csi + CSIRXCNT);
>>               writel((bytesperline << 16) | icd->user_height,
>> @@ -1351,7 +1383,7 @@ static int mx2_camera_try_fmt(struct soc_camera_device *icd,
>>       /* FIXME: implement MX27 limits */
>>
>>       /* limit to MX25 hardware capabilities */
>> -     if (cpu_is_mx25()) {
>> +     if (is_imx25_camera(pcdev)) {
>>               if (xlate->host_fmt->bits_per_sample <= 8)
>>                       width_limit = 0xffff * 4;
>>               else
>> @@ -1685,6 +1717,20 @@ static int __devinit mx2_camera_probe(struct platform_device *pdev)
>>               goto exit;
>>       }
>>
>> +     pcdev->devtype = pdev->id_entry->driver_data;
>> +     switch (pcdev->devtype) {
>> +     case IMX25_CAMERA:
>> +             pcdev->reg_csisr = CSISR_IMX25;
>> +             pcdev->reg_csicr3 = CSICR3_IMX25;
>> +             break;
>> +     case IMX27_CAMERA:
>> +             pcdev->reg_csisr = CSISR_IMX27;
>> +             pcdev->reg_csicr3 = CSICR3_IMX27;
>> +             break;
>> +     default:
>> +             break;
>> +     }
>> +
>>       pcdev->clk_csi = devm_clk_get(&pdev->dev, "ahb");
>>       if (IS_ERR(pcdev->clk_csi)) {
>>               dev_err(&pdev->dev, "Could not get csi clock\n");
>> @@ -1722,7 +1768,7 @@ static int __devinit mx2_camera_probe(struct platform_device *pdev)
>>       pcdev->dev = &pdev->dev;
>>       platform_set_drvdata(pdev, pcdev);
>>
>> -     if (cpu_is_mx25()) {
>> +     if (is_imx25_camera(pcdev)) {
>>               err = devm_request_irq(&pdev->dev, irq_csi, mx25_camera_irq, 0,
>>                                      MX2_CAM_DRV_NAME, pcdev);
>>               if (err) {
>> @@ -1731,7 +1777,7 @@ static int __devinit mx2_camera_probe(struct platform_device *pdev)
>>               }
>>       }
>>
>> -     if (cpu_is_mx27()) {
>> +     if (is_imx27_camera(pcdev)) {
>>               err = mx27_camera_emma_init(pdev);
>>               if (err)
>>                       goto exit;
>> @@ -1742,7 +1788,7 @@ static int __devinit mx2_camera_probe(struct platform_device *pdev)
>>       pcdev->soc_host.priv            = pcdev;
>>       pcdev->soc_host.v4l2_dev.dev    = &pdev->dev;
>>       pcdev->soc_host.nr              = pdev->id;
>> -     if (cpu_is_mx25())
>> +     if (is_imx25_camera(pcdev))
>>               pcdev->soc_host.capabilities = SOCAM_HOST_CAP_STRIDE;
>>
>>       pcdev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
>> @@ -1762,7 +1808,7 @@ static int __devinit mx2_camera_probe(struct platform_device *pdev)
>>  exit_free_emma:
>>       vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx);
>>  eallocctx:
>> -     if (cpu_is_mx27()) {
>> +     if (is_imx27_camera(pcdev)) {
>>               clk_disable_unprepare(pcdev->clk_emma_ipg);
>>               clk_disable_unprepare(pcdev->clk_emma_ahb);
>>       }
>> @@ -1780,7 +1826,7 @@ static int __devexit mx2_camera_remove(struct platform_device *pdev)
>>
>>       vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx);
>>
>> -     if (cpu_is_mx27()) {
>> +     if (is_imx27_camera(pcdev)) {
>>               clk_disable_unprepare(pcdev->clk_emma_ipg);
>>               clk_disable_unprepare(pcdev->clk_emma_ahb);
>>       }
>> @@ -1794,6 +1840,7 @@ static struct platform_driver mx2_camera_driver = {
>>       .driver         = {
>>               .name   = MX2_CAM_DRV_NAME,
>>       },
>> +     .id_table       = mx2_camera_devtype,
>>       .remove         = __devexit_p(mx2_camera_remove),
>>  };
>>
>> --
>> 1.7.9.5

I can't test this patch because it depends heavily on the previous
one, which breaks the driver.

Regards.
Guennadi Liakhovetski - Sept. 17, 2012, 1:59 p.m.
On Mon, 17 Sep 2012, javier Martin wrote:

> Hi Shawn,
> 
> On 17 September 2012 11:21, Guennadi Liakhovetski <g.liakhovetski@gmx.de> wrote:
> > On Mon, 17 Sep 2012, Shawn Guo wrote:
> >
> >> It changes the driver to use platform_device_id rather than cpu_is_xxx
> >> to determine the controller type, and updates the platform code
> >> accordingly.
> >>
> >> As the result, mach/hardware.h inclusion gets removed from the driver.
> >>
> >> Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
> >> Cc: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
> >> Cc: linux-media@vger.kernel.org
> >
> > Acked-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
> 
> i.MX25 support is broken and is scheduled for removal.

It is not yet, I haven't pushed those your patches yet.

Thanks
Guennadi

> I think we should not keep on trying to maintain it. Couldn't we just
> drop it? It only makes maintenance tasks more difficult.
> 
> > Thanks
> > Guennadi
> >
> >> ---
> >>  arch/arm/mach-imx/clk-imx25.c                   |    6 +-
> >>  arch/arm/mach-imx/clk-imx27.c                   |    6 +-
> >>  arch/arm/mach-imx/devices/devices-common.h      |    1 +
> >>  arch/arm/mach-imx/devices/platform-mx2-camera.c |   12 +--
> >>  drivers/media/video/mx2_camera.c                |   95 +++++++++++++++++------
> >>  5 files changed, 85 insertions(+), 35 deletions(-)
> >>
> >> diff --git a/arch/arm/mach-imx/clk-imx25.c b/arch/arm/mach-imx/clk-imx25.c
> >> index 1aea073..71fe521 100644
> >> --- a/arch/arm/mach-imx/clk-imx25.c
> >> +++ b/arch/arm/mach-imx/clk-imx25.c
> >> @@ -231,9 +231,9 @@ int __init mx25_clocks_init(void)
> >>       clk_register_clkdev(clk[esdhc2_ipg_per], "per", "sdhci-esdhc-imx25.1");
> >>       clk_register_clkdev(clk[esdhc2_ipg], "ipg", "sdhci-esdhc-imx25.1");
> >>       clk_register_clkdev(clk[esdhc2_ahb], "ahb", "sdhci-esdhc-imx25.1");
> >> -     clk_register_clkdev(clk[csi_ipg_per], "per", "mx2-camera.0");
> >> -     clk_register_clkdev(clk[csi_ipg], "ipg", "mx2-camera.0");
> >> -     clk_register_clkdev(clk[csi_ahb], "ahb", "mx2-camera.0");
> >> +     clk_register_clkdev(clk[csi_ipg_per], "per", "imx25-camera.0");
> >> +     clk_register_clkdev(clk[csi_ipg], "ipg", "imx25-camera.0");
> >> +     clk_register_clkdev(clk[csi_ahb], "ahb", "imx25-camera.0");
> >>       clk_register_clkdev(clk[dummy], "audmux", NULL);
> >>       clk_register_clkdev(clk[can1_ipg], NULL, "flexcan.0");
> >>       clk_register_clkdev(clk[can2_ipg], NULL, "flexcan.1");
> >> diff --git a/arch/arm/mach-imx/clk-imx27.c b/arch/arm/mach-imx/clk-imx27.c
> >> index 5ff5cf0..e26de52 100644
> >> --- a/arch/arm/mach-imx/clk-imx27.c
> >> +++ b/arch/arm/mach-imx/clk-imx27.c
> >> @@ -224,7 +224,7 @@ int __init mx27_clocks_init(unsigned long fref)
> >>       clk_register_clkdev(clk[per3_gate], "per", "imx-fb.0");
> >>       clk_register_clkdev(clk[lcdc_ipg_gate], "ipg", "imx-fb.0");
> >>       clk_register_clkdev(clk[lcdc_ahb_gate], "ahb", "imx-fb.0");
> >> -     clk_register_clkdev(clk[csi_ahb_gate], "ahb", "mx2-camera.0");
> >> +     clk_register_clkdev(clk[csi_ahb_gate], "ahb", "imx27-camera.0");
> >>       clk_register_clkdev(clk[usb_div], "per", "fsl-usb2-udc");
> >>       clk_register_clkdev(clk[usb_ipg_gate], "ipg", "fsl-usb2-udc");
> >>       clk_register_clkdev(clk[usb_ahb_gate], "ahb", "fsl-usb2-udc");
> >> @@ -251,8 +251,8 @@ int __init mx27_clocks_init(unsigned long fref)
> >>       clk_register_clkdev(clk[i2c2_ipg_gate], NULL, "imx21-i2c.1");
> >>       clk_register_clkdev(clk[owire_ipg_gate], NULL, "mxc_w1.0");
> >>       clk_register_clkdev(clk[kpp_ipg_gate], NULL, "imx-keypad");
> >> -     clk_register_clkdev(clk[emma_ahb_gate], "emma-ahb", "mx2-camera.0");
> >> -     clk_register_clkdev(clk[emma_ipg_gate], "emma-ipg", "mx2-camera.0");
> >> +     clk_register_clkdev(clk[emma_ahb_gate], "emma-ahb", "imx27-camera.0");
> >> +     clk_register_clkdev(clk[emma_ipg_gate], "emma-ipg", "imx27-camera.0");
> >>       clk_register_clkdev(clk[emma_ahb_gate], "ahb", "m2m-emmaprp.0");
> >>       clk_register_clkdev(clk[emma_ipg_gate], "ipg", "m2m-emmaprp.0");
> >>       clk_register_clkdev(clk[iim_ipg_gate], "iim", NULL);
> >> diff --git a/arch/arm/mach-imx/devices/devices-common.h b/arch/arm/mach-imx/devices/devices-common.h
> >> index 7f2698c..8112a1a 100644
> >> --- a/arch/arm/mach-imx/devices/devices-common.h
> >> +++ b/arch/arm/mach-imx/devices/devices-common.h
> >> @@ -202,6 +202,7 @@ struct platform_device *__init imx_add_mx3_sdc_fb(
> >>
> >>  #include <linux/platform_data/camera-mx2.h>
> >>  struct imx_mx2_camera_data {
> >> +     const char *devid;
> >>       resource_size_t iobasecsi;
> >>       resource_size_t iosizecsi;
> >>       resource_size_t irqcsi;
> >> diff --git a/arch/arm/mach-imx/devices/platform-mx2-camera.c b/arch/arm/mach-imx/devices/platform-mx2-camera.c
> >> index 9ad5b2d..b88877d 100644
> >> --- a/arch/arm/mach-imx/devices/platform-mx2-camera.c
> >> +++ b/arch/arm/mach-imx/devices/platform-mx2-camera.c
> >> @@ -9,14 +9,16 @@
> >>  #include <mach/hardware.h>
> >>  #include "devices-common.h"
> >>
> >> -#define imx_mx2_camera_data_entry_single(soc)                                \
> >> +#define imx_mx2_camera_data_entry_single(soc, _devid)                        \
> >>       {                                                               \
> >> +             .devid = _devid,                                        \
> >>               .iobasecsi = soc ## _CSI_BASE_ADDR,                     \
> >>               .iosizecsi = SZ_4K,                                     \
> >>               .irqcsi = soc ## _INT_CSI,                              \
> >>       }
> >> -#define imx_mx2_camera_data_entry_single_emma(soc)                   \
> >> +#define imx_mx2_camera_data_entry_single_emma(soc, _devid)           \
> >>       {                                                               \
> >> +             .devid = _devid,                                        \
> >>               .iobasecsi = soc ## _CSI_BASE_ADDR,                     \
> >>               .iosizecsi = SZ_32,                                     \
> >>               .irqcsi = soc ## _INT_CSI,                              \
> >> @@ -27,12 +29,12 @@
> >>
> >>  #ifdef CONFIG_SOC_IMX25
> >>  const struct imx_mx2_camera_data imx25_mx2_camera_data __initconst =
> >> -     imx_mx2_camera_data_entry_single(MX25);
> >> +     imx_mx2_camera_data_entry_single(MX25, "imx25-camera");
> >>  #endif /* ifdef CONFIG_SOC_IMX25 */
> >>
> >>  #ifdef CONFIG_SOC_IMX27
> >>  const struct imx_mx2_camera_data imx27_mx2_camera_data __initconst =
> >> -     imx_mx2_camera_data_entry_single_emma(MX27);
> >> +     imx_mx2_camera_data_entry_single_emma(MX27, "imx27-camera");
> >>  #endif /* ifdef CONFIG_SOC_IMX27 */
> >>
> >>  struct platform_device *__init imx_add_mx2_camera(
> >> @@ -58,7 +60,7 @@ struct platform_device *__init imx_add_mx2_camera(
> >>                       .flags = IORESOURCE_IRQ,
> >>               },
> >>       };
> >> -     return imx_add_platform_device_dmamask("mx2-camera", 0,
> >> +     return imx_add_platform_device_dmamask(data->devid, 0,
> >>                       res, data->iobaseemmaprp ? 4 : 2,
> >>                       pdata, sizeof(*pdata), DMA_BIT_MASK(32));
> >>  }
> >> diff --git a/drivers/media/video/mx2_camera.c b/drivers/media/video/mx2_camera.c
> >> index fe4c76c..cde3374 100644
> >> --- a/drivers/media/video/mx2_camera.c
> >> +++ b/drivers/media/video/mx2_camera.c
> >> @@ -41,7 +41,6 @@
> >>  #include <linux/videodev2.h>
> >>
> >>  #include <linux/platform_data/camera-mx2.h>
> >> -#include <mach/hardware.h>
> >>
> >>  #include <asm/dma.h>
> >>
> >> @@ -121,11 +120,13 @@
> >>
> >>  #define CSICR1                       0x00
> >>  #define CSICR2                       0x04
> >> -#define CSISR                        (cpu_is_mx27() ? 0x08 : 0x18)
> >> +#define CSISR_IMX25          0x18
> >> +#define CSISR_IMX27          0x08
> >>  #define CSISTATFIFO          0x0c
> >>  #define CSIRFIFO             0x10
> >>  #define CSIRXCNT             0x14
> >> -#define CSICR3                       (cpu_is_mx27() ? 0x1C : 0x08)
> >> +#define CSICR3_IMX25         0x08
> >> +#define CSICR3_IMX27         0x1c
> >>  #define CSIDMASA_STATFIFO    0x20
> >>  #define CSIDMATA_STATFIFO    0x24
> >>  #define CSIDMASA_FB1         0x28
> >> @@ -268,6 +269,11 @@ struct mx2_buffer {
> >>       struct mx2_buf_internal         internal;
> >>  };
> >>
> >> +enum mx2_camera_type {
> >> +     IMX25_CAMERA,
> >> +     IMX27_CAMERA,
> >> +};
> >> +
> >>  struct mx2_camera_dev {
> >>       struct device           *dev;
> >>       struct soc_camera_host  soc_host;
> >> @@ -291,6 +297,9 @@ struct mx2_camera_dev {
> >>       struct mx2_buffer       *fb2_active;
> >>
> >>       u32                     csicr1;
> >> +     u32                     reg_csisr;
> >> +     u32                     reg_csicr3;
> >> +     enum mx2_camera_type    devtype;
> >>
> >>       struct mx2_buf_internal buf_discard[2];
> >>       void                    *discard_buffer;
> >> @@ -303,6 +312,29 @@ struct mx2_camera_dev {
> >>       struct vb2_alloc_ctx    *alloc_ctx;
> >>  };
> >>
> >> +static struct platform_device_id mx2_camera_devtype[] = {
> >> +     {
> >> +             .name = "imx25-camera",
> >> +             .driver_data = IMX25_CAMERA,
> >> +     }, {
> >> +             .name = "imx27-camera",
> >> +             .driver_data = IMX27_CAMERA,
> >> +     }, {
> >> +             /* sentinel */
> >> +     }
> >> +};
> >> +MODULE_DEVICE_TABLE(platform, mx2_camera_devtype);
> >> +
> >> +static inline int is_imx25_camera(struct mx2_camera_dev *pcdev)
> >> +{
> >> +     return pcdev->devtype == IMX25_CAMERA;
> >> +}
> >> +
> >> +static inline int is_imx27_camera(struct mx2_camera_dev *pcdev)
> >> +{
> >> +     return pcdev->devtype == IMX27_CAMERA;
> >> +}
> >> +
> >>  static struct mx2_buffer *mx2_ibuf_to_buf(struct mx2_buf_internal *int_buf)
> >>  {
> >>       return container_of(int_buf, struct mx2_buffer, internal);
> >> @@ -406,9 +438,9 @@ static void mx2_camera_deactivate(struct mx2_camera_dev *pcdev)
> >>
> >>       clk_disable_unprepare(pcdev->clk_csi);
> >>       writel(0, pcdev->base_csi + CSICR1);
> >> -     if (cpu_is_mx27()) {
> >> +     if (is_imx27_camera(pcdev)) {
> >>               writel(0, pcdev->base_emma + PRP_CNTL);
> >> -     } else if (cpu_is_mx25()) {
> >> +     } else if (is_imx25_camera(pcdev)) {
> >>               spin_lock_irqsave(&pcdev->lock, flags);
> >>               pcdev->fb1_active = NULL;
> >>               pcdev->fb2_active = NULL;
> >> @@ -438,7 +470,7 @@ static int mx2_camera_add_device(struct soc_camera_device *icd)
> >>
> >>       csicr1 = CSICR1_MCLKEN;
> >>
> >> -     if (cpu_is_mx27())
> >> +     if (is_imx27_camera(pcdev))
> >>               csicr1 |= CSICR1_PRP_IF_EN | CSICR1_FCC |
> >>                       CSICR1_RXFF_LEVEL(0);
> >>
> >> @@ -514,7 +546,7 @@ out:
> >>  static irqreturn_t mx25_camera_irq(int irq_csi, void *data)
> >>  {
> >>       struct mx2_camera_dev *pcdev = data;
> >> -     u32 status = readl(pcdev->base_csi + CSISR);
> >> +     u32 status = readl(pcdev->base_csi + pcdev->reg_csisr);
> >>
> >>       if (status & CSISR_DMA_TSF_FB1_INT)
> >>               mx25_camera_frame_done(pcdev, 1, MX2_STATE_DONE);
> >> @@ -523,7 +555,7 @@ static irqreturn_t mx25_camera_irq(int irq_csi, void *data)
> >>
> >>       /* FIXME: handle CSISR_RFF_OR_INT */
> >>
> >> -     writel(status, pcdev->base_csi + CSISR);
> >> +     writel(status, pcdev->base_csi + pcdev->reg_csisr);
> >>
> >>       return IRQ_HANDLED;
> >>  }
> >> @@ -608,7 +640,7 @@ static void mx2_videobuf_queue(struct vb2_buffer *vb)
> >>       buf->state = MX2_STATE_QUEUED;
> >>       list_add_tail(&buf->internal.queue, &pcdev->capture);
> >>
> >> -     if (cpu_is_mx25()) {
> >> +     if (is_imx25_camera(pcdev)) {
> >>               u32 csicr3, dma_inten = 0;
> >>
> >>               if (pcdev->fb1_active == NULL) {
> >> @@ -627,20 +659,20 @@ static void mx2_videobuf_queue(struct vb2_buffer *vb)
> >>                       list_del(&buf->internal.queue);
> >>                       buf->state = MX2_STATE_ACTIVE;
> >>
> >> -                     csicr3 = readl(pcdev->base_csi + CSICR3);
> >> +                     csicr3 = readl(pcdev->base_csi + pcdev->reg_csicr3);
> >>
> >>                       /* Reflash DMA */
> >>                       writel(csicr3 | CSICR3_DMA_REFLASH_RFF,
> >> -                                     pcdev->base_csi + CSICR3);
> >> +                                     pcdev->base_csi + pcdev->reg_csicr3);
> >>
> >>                       /* clear & enable interrupts */
> >> -                     writel(dma_inten, pcdev->base_csi + CSISR);
> >> +                     writel(dma_inten, pcdev->base_csi + pcdev->reg_csisr);
> >>                       pcdev->csicr1 |= dma_inten;
> >>                       writel(pcdev->csicr1, pcdev->base_csi + CSICR1);
> >>
> >>                       /* enable DMA */
> >>                       csicr3 |= CSICR3_DMA_REQ_EN_RFF | CSICR3_RXFF_LEVEL(1);
> >> -                     writel(csicr3, pcdev->base_csi + CSICR3);
> >> +                     writel(csicr3, pcdev->base_csi + pcdev->reg_csicr3);
> >>               }
> >>       }
> >>
> >> @@ -684,7 +716,7 @@ static void mx2_videobuf_release(struct vb2_buffer *vb)
> >>        */
> >>
> >>       spin_lock_irqsave(&pcdev->lock, flags);
> >> -     if (cpu_is_mx25() && buf->state == MX2_STATE_ACTIVE) {
> >> +     if (is_imx25_camera(pcdev) && buf->state == MX2_STATE_ACTIVE) {
> >>               if (pcdev->fb1_active == buf) {
> >>                       pcdev->csicr1 &= ~CSICR1_FB1_DMA_INTEN;
> >>                       writel(0, pcdev->base_csi + CSIDMASA_FB1);
> >> @@ -807,7 +839,7 @@ static int mx2_start_streaming(struct vb2_queue *q, unsigned int count)
> >>       unsigned long phys;
> >>       int bytesperline;
> >>
> >> -     if (cpu_is_mx27()) {
> >> +     if (is_imx27_camera(pcdev)) {
> >>               unsigned long flags;
> >>               if (count < 2)
> >>                       return -EINVAL;
> >> @@ -902,7 +934,7 @@ static int mx2_stop_streaming(struct vb2_queue *q)
> >>       void *b;
> >>       u32 cntl;
> >>
> >> -     if (cpu_is_mx27()) {
> >> +     if (is_imx27_camera(pcdev)) {
> >>               spin_lock_irqsave(&pcdev->lock, flags);
> >>
> >>               cntl = readl(pcdev->base_emma + PRP_CNTL);
> >> @@ -1054,11 +1086,11 @@ static int mx2_camera_set_bus_param(struct soc_camera_device *icd)
> >>       if (bytesperline < 0)
> >>               return bytesperline;
> >>
> >> -     if (cpu_is_mx27()) {
> >> +     if (is_imx27_camera(pcdev)) {
> >>               ret = mx27_camera_emma_prp_reset(pcdev);
> >>               if (ret)
> >>                       return ret;
> >> -     } else if (cpu_is_mx25()) {
> >> +     } else if (is_imx25_camera(pcdev)) {
> >>               writel((bytesperline * icd->user_height) >> 2,
> >>                               pcdev->base_csi + CSIRXCNT);
> >>               writel((bytesperline << 16) | icd->user_height,
> >> @@ -1351,7 +1383,7 @@ static int mx2_camera_try_fmt(struct soc_camera_device *icd,
> >>       /* FIXME: implement MX27 limits */
> >>
> >>       /* limit to MX25 hardware capabilities */
> >> -     if (cpu_is_mx25()) {
> >> +     if (is_imx25_camera(pcdev)) {
> >>               if (xlate->host_fmt->bits_per_sample <= 8)
> >>                       width_limit = 0xffff * 4;
> >>               else
> >> @@ -1685,6 +1717,20 @@ static int __devinit mx2_camera_probe(struct platform_device *pdev)
> >>               goto exit;
> >>       }
> >>
> >> +     pcdev->devtype = pdev->id_entry->driver_data;
> >> +     switch (pcdev->devtype) {
> >> +     case IMX25_CAMERA:
> >> +             pcdev->reg_csisr = CSISR_IMX25;
> >> +             pcdev->reg_csicr3 = CSICR3_IMX25;
> >> +             break;
> >> +     case IMX27_CAMERA:
> >> +             pcdev->reg_csisr = CSISR_IMX27;
> >> +             pcdev->reg_csicr3 = CSICR3_IMX27;
> >> +             break;
> >> +     default:
> >> +             break;
> >> +     }
> >> +
> >>       pcdev->clk_csi = devm_clk_get(&pdev->dev, "ahb");
> >>       if (IS_ERR(pcdev->clk_csi)) {
> >>               dev_err(&pdev->dev, "Could not get csi clock\n");
> >> @@ -1722,7 +1768,7 @@ static int __devinit mx2_camera_probe(struct platform_device *pdev)
> >>       pcdev->dev = &pdev->dev;
> >>       platform_set_drvdata(pdev, pcdev);
> >>
> >> -     if (cpu_is_mx25()) {
> >> +     if (is_imx25_camera(pcdev)) {
> >>               err = devm_request_irq(&pdev->dev, irq_csi, mx25_camera_irq, 0,
> >>                                      MX2_CAM_DRV_NAME, pcdev);
> >>               if (err) {
> >> @@ -1731,7 +1777,7 @@ static int __devinit mx2_camera_probe(struct platform_device *pdev)
> >>               }
> >>       }
> >>
> >> -     if (cpu_is_mx27()) {
> >> +     if (is_imx27_camera(pcdev)) {
> >>               err = mx27_camera_emma_init(pdev);
> >>               if (err)
> >>                       goto exit;
> >> @@ -1742,7 +1788,7 @@ static int __devinit mx2_camera_probe(struct platform_device *pdev)
> >>       pcdev->soc_host.priv            = pcdev;
> >>       pcdev->soc_host.v4l2_dev.dev    = &pdev->dev;
> >>       pcdev->soc_host.nr              = pdev->id;
> >> -     if (cpu_is_mx25())
> >> +     if (is_imx25_camera(pcdev))
> >>               pcdev->soc_host.capabilities = SOCAM_HOST_CAP_STRIDE;
> >>
> >>       pcdev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
> >> @@ -1762,7 +1808,7 @@ static int __devinit mx2_camera_probe(struct platform_device *pdev)
> >>  exit_free_emma:
> >>       vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx);
> >>  eallocctx:
> >> -     if (cpu_is_mx27()) {
> >> +     if (is_imx27_camera(pcdev)) {
> >>               clk_disable_unprepare(pcdev->clk_emma_ipg);
> >>               clk_disable_unprepare(pcdev->clk_emma_ahb);
> >>       }
> >> @@ -1780,7 +1826,7 @@ static int __devexit mx2_camera_remove(struct platform_device *pdev)
> >>
> >>       vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx);
> >>
> >> -     if (cpu_is_mx27()) {
> >> +     if (is_imx27_camera(pcdev)) {
> >>               clk_disable_unprepare(pcdev->clk_emma_ipg);
> >>               clk_disable_unprepare(pcdev->clk_emma_ahb);
> >>       }
> >> @@ -1794,6 +1840,7 @@ static struct platform_driver mx2_camera_driver = {
> >>       .driver         = {
> >>               .name   = MX2_CAM_DRV_NAME,
> >>       },
> >> +     .id_table       = mx2_camera_devtype,
> >>       .remove         = __devexit_p(mx2_camera_remove),
> >>  };
> >>
> >> --
> >> 1.7.9.5
> 
> I can't test this patch because it depends heavily on the previous
> one, which breaks the driver.
> 
> Regards.
> 
> -- 
> Javier Martin
> Vista Silicon S.L.
> CDTUC - FASE C - Oficina S-345
> Avda de los Castros s/n
> 39005- Santander. Cantabria. Spain
> +34 942 25 32 60
> www.vista-silicon.com
> 

---
Guennadi Liakhovetski, Ph.D.
Freelance Open-Source Software Developer
http://www.open-technology.de/
Javier Martin - Sept. 18, 2012, 8:35 a.m.
On 17 September 2012 15:59, Guennadi Liakhovetski <g.liakhovetski@gmx.de> wrote:
> On Mon, 17 Sep 2012, javier Martin wrote:
>
>> Hi Shawn,
>>
>> On 17 September 2012 11:21, Guennadi Liakhovetski <g.liakhovetski@gmx.de> wrote:
>> > On Mon, 17 Sep 2012, Shawn Guo wrote:
>> >
>> >> It changes the driver to use platform_device_id rather than cpu_is_xxx
>> >> to determine the controller type, and updates the platform code
>> >> accordingly.
>> >>
>> >> As the result, mach/hardware.h inclusion gets removed from the driver.
>> >>
>> >> Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
>> >> Cc: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
>> >> Cc: linux-media@vger.kernel.org
>> >

Tested-by: Javier Martin <javier.martin@vista-silicon.com>

>> > Acked-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
>>
>> i.MX25 support is broken and is scheduled for removal.
>
> It is not yet, I haven't pushed those your patches yet.
>
> Thanks
> Guennadi
>
>> I think we should not keep on trying to maintain it. Couldn't we just
>> drop it? It only makes maintenance tasks more difficult.
>>
>> > Thanks
>> > Guennadi
>> >
>> >> ---
>> >>  arch/arm/mach-imx/clk-imx25.c                   |    6 +-
>> >>  arch/arm/mach-imx/clk-imx27.c                   |    6 +-
>> >>  arch/arm/mach-imx/devices/devices-common.h      |    1 +
>> >>  arch/arm/mach-imx/devices/platform-mx2-camera.c |   12 +--
>> >>  drivers/media/video/mx2_camera.c                |   95 +++++++++++++++++------
>> >>  5 files changed, 85 insertions(+), 35 deletions(-)
>> >>
>> >> diff --git a/arch/arm/mach-imx/clk-imx25.c b/arch/arm/mach-imx/clk-imx25.c
>> >> index 1aea073..71fe521 100644
>> >> --- a/arch/arm/mach-imx/clk-imx25.c
>> >> +++ b/arch/arm/mach-imx/clk-imx25.c
>> >> @@ -231,9 +231,9 @@ int __init mx25_clocks_init(void)
>> >>       clk_register_clkdev(clk[esdhc2_ipg_per], "per", "sdhci-esdhc-imx25.1");
>> >>       clk_register_clkdev(clk[esdhc2_ipg], "ipg", "sdhci-esdhc-imx25.1");
>> >>       clk_register_clkdev(clk[esdhc2_ahb], "ahb", "sdhci-esdhc-imx25.1");
>> >> -     clk_register_clkdev(clk[csi_ipg_per], "per", "mx2-camera.0");
>> >> -     clk_register_clkdev(clk[csi_ipg], "ipg", "mx2-camera.0");
>> >> -     clk_register_clkdev(clk[csi_ahb], "ahb", "mx2-camera.0");
>> >> +     clk_register_clkdev(clk[csi_ipg_per], "per", "imx25-camera.0");
>> >> +     clk_register_clkdev(clk[csi_ipg], "ipg", "imx25-camera.0");
>> >> +     clk_register_clkdev(clk[csi_ahb], "ahb", "imx25-camera.0");
>> >>       clk_register_clkdev(clk[dummy], "audmux", NULL);
>> >>       clk_register_clkdev(clk[can1_ipg], NULL, "flexcan.0");
>> >>       clk_register_clkdev(clk[can2_ipg], NULL, "flexcan.1");
>> >> diff --git a/arch/arm/mach-imx/clk-imx27.c b/arch/arm/mach-imx/clk-imx27.c
>> >> index 5ff5cf0..e26de52 100644
>> >> --- a/arch/arm/mach-imx/clk-imx27.c
>> >> +++ b/arch/arm/mach-imx/clk-imx27.c
>> >> @@ -224,7 +224,7 @@ int __init mx27_clocks_init(unsigned long fref)
>> >>       clk_register_clkdev(clk[per3_gate], "per", "imx-fb.0");
>> >>       clk_register_clkdev(clk[lcdc_ipg_gate], "ipg", "imx-fb.0");
>> >>       clk_register_clkdev(clk[lcdc_ahb_gate], "ahb", "imx-fb.0");
>> >> -     clk_register_clkdev(clk[csi_ahb_gate], "ahb", "mx2-camera.0");
>> >> +     clk_register_clkdev(clk[csi_ahb_gate], "ahb", "imx27-camera.0");
>> >>       clk_register_clkdev(clk[usb_div], "per", "fsl-usb2-udc");
>> >>       clk_register_clkdev(clk[usb_ipg_gate], "ipg", "fsl-usb2-udc");
>> >>       clk_register_clkdev(clk[usb_ahb_gate], "ahb", "fsl-usb2-udc");
>> >> @@ -251,8 +251,8 @@ int __init mx27_clocks_init(unsigned long fref)
>> >>       clk_register_clkdev(clk[i2c2_ipg_gate], NULL, "imx21-i2c.1");
>> >>       clk_register_clkdev(clk[owire_ipg_gate], NULL, "mxc_w1.0");
>> >>       clk_register_clkdev(clk[kpp_ipg_gate], NULL, "imx-keypad");
>> >> -     clk_register_clkdev(clk[emma_ahb_gate], "emma-ahb", "mx2-camera.0");
>> >> -     clk_register_clkdev(clk[emma_ipg_gate], "emma-ipg", "mx2-camera.0");
>> >> +     clk_register_clkdev(clk[emma_ahb_gate], "emma-ahb", "imx27-camera.0");
>> >> +     clk_register_clkdev(clk[emma_ipg_gate], "emma-ipg", "imx27-camera.0");
>> >>       clk_register_clkdev(clk[emma_ahb_gate], "ahb", "m2m-emmaprp.0");
>> >>       clk_register_clkdev(clk[emma_ipg_gate], "ipg", "m2m-emmaprp.0");
>> >>       clk_register_clkdev(clk[iim_ipg_gate], "iim", NULL);
>> >> diff --git a/arch/arm/mach-imx/devices/devices-common.h b/arch/arm/mach-imx/devices/devices-common.h
>> >> index 7f2698c..8112a1a 100644
>> >> --- a/arch/arm/mach-imx/devices/devices-common.h
>> >> +++ b/arch/arm/mach-imx/devices/devices-common.h
>> >> @@ -202,6 +202,7 @@ struct platform_device *__init imx_add_mx3_sdc_fb(
>> >>
>> >>  #include <linux/platform_data/camera-mx2.h>
>> >>  struct imx_mx2_camera_data {
>> >> +     const char *devid;
>> >>       resource_size_t iobasecsi;
>> >>       resource_size_t iosizecsi;
>> >>       resource_size_t irqcsi;
>> >> diff --git a/arch/arm/mach-imx/devices/platform-mx2-camera.c b/arch/arm/mach-imx/devices/platform-mx2-camera.c
>> >> index 9ad5b2d..b88877d 100644
>> >> --- a/arch/arm/mach-imx/devices/platform-mx2-camera.c
>> >> +++ b/arch/arm/mach-imx/devices/platform-mx2-camera.c
>> >> @@ -9,14 +9,16 @@
>> >>  #include <mach/hardware.h>
>> >>  #include "devices-common.h"
>> >>
>> >> -#define imx_mx2_camera_data_entry_single(soc)                                \
>> >> +#define imx_mx2_camera_data_entry_single(soc, _devid)                        \
>> >>       {                                                               \
>> >> +             .devid = _devid,                                        \
>> >>               .iobasecsi = soc ## _CSI_BASE_ADDR,                     \
>> >>               .iosizecsi = SZ_4K,                                     \
>> >>               .irqcsi = soc ## _INT_CSI,                              \
>> >>       }
>> >> -#define imx_mx2_camera_data_entry_single_emma(soc)                   \
>> >> +#define imx_mx2_camera_data_entry_single_emma(soc, _devid)           \
>> >>       {                                                               \
>> >> +             .devid = _devid,                                        \
>> >>               .iobasecsi = soc ## _CSI_BASE_ADDR,                     \
>> >>               .iosizecsi = SZ_32,                                     \
>> >>               .irqcsi = soc ## _INT_CSI,                              \
>> >> @@ -27,12 +29,12 @@
>> >>
>> >>  #ifdef CONFIG_SOC_IMX25
>> >>  const struct imx_mx2_camera_data imx25_mx2_camera_data __initconst =
>> >> -     imx_mx2_camera_data_entry_single(MX25);
>> >> +     imx_mx2_camera_data_entry_single(MX25, "imx25-camera");
>> >>  #endif /* ifdef CONFIG_SOC_IMX25 */
>> >>
>> >>  #ifdef CONFIG_SOC_IMX27
>> >>  const struct imx_mx2_camera_data imx27_mx2_camera_data __initconst =
>> >> -     imx_mx2_camera_data_entry_single_emma(MX27);
>> >> +     imx_mx2_camera_data_entry_single_emma(MX27, "imx27-camera");
>> >>  #endif /* ifdef CONFIG_SOC_IMX27 */
>> >>
>> >>  struct platform_device *__init imx_add_mx2_camera(
>> >> @@ -58,7 +60,7 @@ struct platform_device *__init imx_add_mx2_camera(
>> >>                       .flags = IORESOURCE_IRQ,
>> >>               },
>> >>       };
>> >> -     return imx_add_platform_device_dmamask("mx2-camera", 0,
>> >> +     return imx_add_platform_device_dmamask(data->devid, 0,
>> >>                       res, data->iobaseemmaprp ? 4 : 2,
>> >>                       pdata, sizeof(*pdata), DMA_BIT_MASK(32));
>> >>  }
>> >> diff --git a/drivers/media/video/mx2_camera.c b/drivers/media/video/mx2_camera.c
>> >> index fe4c76c..cde3374 100644
>> >> --- a/drivers/media/video/mx2_camera.c
>> >> +++ b/drivers/media/video/mx2_camera.c
>> >> @@ -41,7 +41,6 @@
>> >>  #include <linux/videodev2.h>
>> >>
>> >>  #include <linux/platform_data/camera-mx2.h>
>> >> -#include <mach/hardware.h>
>> >>
>> >>  #include <asm/dma.h>
>> >>
>> >> @@ -121,11 +120,13 @@
>> >>
>> >>  #define CSICR1                       0x00
>> >>  #define CSICR2                       0x04
>> >> -#define CSISR                        (cpu_is_mx27() ? 0x08 : 0x18)
>> >> +#define CSISR_IMX25          0x18
>> >> +#define CSISR_IMX27          0x08
>> >>  #define CSISTATFIFO          0x0c
>> >>  #define CSIRFIFO             0x10
>> >>  #define CSIRXCNT             0x14
>> >> -#define CSICR3                       (cpu_is_mx27() ? 0x1C : 0x08)
>> >> +#define CSICR3_IMX25         0x08
>> >> +#define CSICR3_IMX27         0x1c
>> >>  #define CSIDMASA_STATFIFO    0x20
>> >>  #define CSIDMATA_STATFIFO    0x24
>> >>  #define CSIDMASA_FB1         0x28
>> >> @@ -268,6 +269,11 @@ struct mx2_buffer {
>> >>       struct mx2_buf_internal         internal;
>> >>  };
>> >>
>> >> +enum mx2_camera_type {
>> >> +     IMX25_CAMERA,
>> >> +     IMX27_CAMERA,
>> >> +};
>> >> +
>> >>  struct mx2_camera_dev {
>> >>       struct device           *dev;
>> >>       struct soc_camera_host  soc_host;
>> >> @@ -291,6 +297,9 @@ struct mx2_camera_dev {
>> >>       struct mx2_buffer       *fb2_active;
>> >>
>> >>       u32                     csicr1;
>> >> +     u32                     reg_csisr;
>> >> +     u32                     reg_csicr3;
>> >> +     enum mx2_camera_type    devtype;
>> >>
>> >>       struct mx2_buf_internal buf_discard[2];
>> >>       void                    *discard_buffer;
>> >> @@ -303,6 +312,29 @@ struct mx2_camera_dev {
>> >>       struct vb2_alloc_ctx    *alloc_ctx;
>> >>  };
>> >>
>> >> +static struct platform_device_id mx2_camera_devtype[] = {
>> >> +     {
>> >> +             .name = "imx25-camera",
>> >> +             .driver_data = IMX25_CAMERA,
>> >> +     }, {
>> >> +             .name = "imx27-camera",
>> >> +             .driver_data = IMX27_CAMERA,
>> >> +     }, {
>> >> +             /* sentinel */
>> >> +     }
>> >> +};
>> >> +MODULE_DEVICE_TABLE(platform, mx2_camera_devtype);
>> >> +
>> >> +static inline int is_imx25_camera(struct mx2_camera_dev *pcdev)
>> >> +{
>> >> +     return pcdev->devtype == IMX25_CAMERA;
>> >> +}
>> >> +
>> >> +static inline int is_imx27_camera(struct mx2_camera_dev *pcdev)
>> >> +{
>> >> +     return pcdev->devtype == IMX27_CAMERA;
>> >> +}
>> >> +
>> >>  static struct mx2_buffer *mx2_ibuf_to_buf(struct mx2_buf_internal *int_buf)
>> >>  {
>> >>       return container_of(int_buf, struct mx2_buffer, internal);
>> >> @@ -406,9 +438,9 @@ static void mx2_camera_deactivate(struct mx2_camera_dev *pcdev)
>> >>
>> >>       clk_disable_unprepare(pcdev->clk_csi);
>> >>       writel(0, pcdev->base_csi + CSICR1);
>> >> -     if (cpu_is_mx27()) {
>> >> +     if (is_imx27_camera(pcdev)) {
>> >>               writel(0, pcdev->base_emma + PRP_CNTL);
>> >> -     } else if (cpu_is_mx25()) {
>> >> +     } else if (is_imx25_camera(pcdev)) {
>> >>               spin_lock_irqsave(&pcdev->lock, flags);
>> >>               pcdev->fb1_active = NULL;
>> >>               pcdev->fb2_active = NULL;
>> >> @@ -438,7 +470,7 @@ static int mx2_camera_add_device(struct soc_camera_device *icd)
>> >>
>> >>       csicr1 = CSICR1_MCLKEN;
>> >>
>> >> -     if (cpu_is_mx27())
>> >> +     if (is_imx27_camera(pcdev))
>> >>               csicr1 |= CSICR1_PRP_IF_EN | CSICR1_FCC |
>> >>                       CSICR1_RXFF_LEVEL(0);
>> >>
>> >> @@ -514,7 +546,7 @@ out:
>> >>  static irqreturn_t mx25_camera_irq(int irq_csi, void *data)
>> >>  {
>> >>       struct mx2_camera_dev *pcdev = data;
>> >> -     u32 status = readl(pcdev->base_csi + CSISR);
>> >> +     u32 status = readl(pcdev->base_csi + pcdev->reg_csisr);
>> >>
>> >>       if (status & CSISR_DMA_TSF_FB1_INT)
>> >>               mx25_camera_frame_done(pcdev, 1, MX2_STATE_DONE);
>> >> @@ -523,7 +555,7 @@ static irqreturn_t mx25_camera_irq(int irq_csi, void *data)
>> >>
>> >>       /* FIXME: handle CSISR_RFF_OR_INT */
>> >>
>> >> -     writel(status, pcdev->base_csi + CSISR);
>> >> +     writel(status, pcdev->base_csi + pcdev->reg_csisr);
>> >>
>> >>       return IRQ_HANDLED;
>> >>  }
>> >> @@ -608,7 +640,7 @@ static void mx2_videobuf_queue(struct vb2_buffer *vb)
>> >>       buf->state = MX2_STATE_QUEUED;
>> >>       list_add_tail(&buf->internal.queue, &pcdev->capture);
>> >>
>> >> -     if (cpu_is_mx25()) {
>> >> +     if (is_imx25_camera(pcdev)) {
>> >>               u32 csicr3, dma_inten = 0;
>> >>
>> >>               if (pcdev->fb1_active == NULL) {
>> >> @@ -627,20 +659,20 @@ static void mx2_videobuf_queue(struct vb2_buffer *vb)
>> >>                       list_del(&buf->internal.queue);
>> >>                       buf->state = MX2_STATE_ACTIVE;
>> >>
>> >> -                     csicr3 = readl(pcdev->base_csi + CSICR3);
>> >> +                     csicr3 = readl(pcdev->base_csi + pcdev->reg_csicr3);
>> >>
>> >>                       /* Reflash DMA */
>> >>                       writel(csicr3 | CSICR3_DMA_REFLASH_RFF,
>> >> -                                     pcdev->base_csi + CSICR3);
>> >> +                                     pcdev->base_csi + pcdev->reg_csicr3);
>> >>
>> >>                       /* clear & enable interrupts */
>> >> -                     writel(dma_inten, pcdev->base_csi + CSISR);
>> >> +                     writel(dma_inten, pcdev->base_csi + pcdev->reg_csisr);
>> >>                       pcdev->csicr1 |= dma_inten;
>> >>                       writel(pcdev->csicr1, pcdev->base_csi + CSICR1);
>> >>
>> >>                       /* enable DMA */
>> >>                       csicr3 |= CSICR3_DMA_REQ_EN_RFF | CSICR3_RXFF_LEVEL(1);
>> >> -                     writel(csicr3, pcdev->base_csi + CSICR3);
>> >> +                     writel(csicr3, pcdev->base_csi + pcdev->reg_csicr3);
>> >>               }
>> >>       }
>> >>
>> >> @@ -684,7 +716,7 @@ static void mx2_videobuf_release(struct vb2_buffer *vb)
>> >>        */
>> >>
>> >>       spin_lock_irqsave(&pcdev->lock, flags);
>> >> -     if (cpu_is_mx25() && buf->state == MX2_STATE_ACTIVE) {
>> >> +     if (is_imx25_camera(pcdev) && buf->state == MX2_STATE_ACTIVE) {
>> >>               if (pcdev->fb1_active == buf) {
>> >>                       pcdev->csicr1 &= ~CSICR1_FB1_DMA_INTEN;
>> >>                       writel(0, pcdev->base_csi + CSIDMASA_FB1);
>> >> @@ -807,7 +839,7 @@ static int mx2_start_streaming(struct vb2_queue *q, unsigned int count)
>> >>       unsigned long phys;
>> >>       int bytesperline;
>> >>
>> >> -     if (cpu_is_mx27()) {
>> >> +     if (is_imx27_camera(pcdev)) {
>> >>               unsigned long flags;
>> >>               if (count < 2)
>> >>                       return -EINVAL;
>> >> @@ -902,7 +934,7 @@ static int mx2_stop_streaming(struct vb2_queue *q)
>> >>       void *b;
>> >>       u32 cntl;
>> >>
>> >> -     if (cpu_is_mx27()) {
>> >> +     if (is_imx27_camera(pcdev)) {
>> >>               spin_lock_irqsave(&pcdev->lock, flags);
>> >>
>> >>               cntl = readl(pcdev->base_emma + PRP_CNTL);
>> >> @@ -1054,11 +1086,11 @@ static int mx2_camera_set_bus_param(struct soc_camera_device *icd)
>> >>       if (bytesperline < 0)
>> >>               return bytesperline;
>> >>
>> >> -     if (cpu_is_mx27()) {
>> >> +     if (is_imx27_camera(pcdev)) {
>> >>               ret = mx27_camera_emma_prp_reset(pcdev);
>> >>               if (ret)
>> >>                       return ret;
>> >> -     } else if (cpu_is_mx25()) {
>> >> +     } else if (is_imx25_camera(pcdev)) {
>> >>               writel((bytesperline * icd->user_height) >> 2,
>> >>                               pcdev->base_csi + CSIRXCNT);
>> >>               writel((bytesperline << 16) | icd->user_height,
>> >> @@ -1351,7 +1383,7 @@ static int mx2_camera_try_fmt(struct soc_camera_device *icd,
>> >>       /* FIXME: implement MX27 limits */
>> >>
>> >>       /* limit to MX25 hardware capabilities */
>> >> -     if (cpu_is_mx25()) {
>> >> +     if (is_imx25_camera(pcdev)) {
>> >>               if (xlate->host_fmt->bits_per_sample <= 8)
>> >>                       width_limit = 0xffff * 4;
>> >>               else
>> >> @@ -1685,6 +1717,20 @@ static int __devinit mx2_camera_probe(struct platform_device *pdev)
>> >>               goto exit;
>> >>       }
>> >>
>> >> +     pcdev->devtype = pdev->id_entry->driver_data;
>> >> +     switch (pcdev->devtype) {
>> >> +     case IMX25_CAMERA:
>> >> +             pcdev->reg_csisr = CSISR_IMX25;
>> >> +             pcdev->reg_csicr3 = CSICR3_IMX25;
>> >> +             break;
>> >> +     case IMX27_CAMERA:
>> >> +             pcdev->reg_csisr = CSISR_IMX27;
>> >> +             pcdev->reg_csicr3 = CSICR3_IMX27;
>> >> +             break;
>> >> +     default:
>> >> +             break;
>> >> +     }
>> >> +
>> >>       pcdev->clk_csi = devm_clk_get(&pdev->dev, "ahb");
>> >>       if (IS_ERR(pcdev->clk_csi)) {
>> >>               dev_err(&pdev->dev, "Could not get csi clock\n");
>> >> @@ -1722,7 +1768,7 @@ static int __devinit mx2_camera_probe(struct platform_device *pdev)
>> >>       pcdev->dev = &pdev->dev;
>> >>       platform_set_drvdata(pdev, pcdev);
>> >>
>> >> -     if (cpu_is_mx25()) {
>> >> +     if (is_imx25_camera(pcdev)) {
>> >>               err = devm_request_irq(&pdev->dev, irq_csi, mx25_camera_irq, 0,
>> >>                                      MX2_CAM_DRV_NAME, pcdev);
>> >>               if (err) {
>> >> @@ -1731,7 +1777,7 @@ static int __devinit mx2_camera_probe(struct platform_device *pdev)
>> >>               }
>> >>       }
>> >>
>> >> -     if (cpu_is_mx27()) {
>> >> +     if (is_imx27_camera(pcdev)) {
>> >>               err = mx27_camera_emma_init(pdev);
>> >>               if (err)
>> >>                       goto exit;
>> >> @@ -1742,7 +1788,7 @@ static int __devinit mx2_camera_probe(struct platform_device *pdev)
>> >>       pcdev->soc_host.priv            = pcdev;
>> >>       pcdev->soc_host.v4l2_dev.dev    = &pdev->dev;
>> >>       pcdev->soc_host.nr              = pdev->id;
>> >> -     if (cpu_is_mx25())
>> >> +     if (is_imx25_camera(pcdev))
>> >>               pcdev->soc_host.capabilities = SOCAM_HOST_CAP_STRIDE;
>> >>
>> >>       pcdev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
>> >> @@ -1762,7 +1808,7 @@ static int __devinit mx2_camera_probe(struct platform_device *pdev)
>> >>  exit_free_emma:
>> >>       vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx);
>> >>  eallocctx:
>> >> -     if (cpu_is_mx27()) {
>> >> +     if (is_imx27_camera(pcdev)) {
>> >>               clk_disable_unprepare(pcdev->clk_emma_ipg);
>> >>               clk_disable_unprepare(pcdev->clk_emma_ahb);
>> >>       }
>> >> @@ -1780,7 +1826,7 @@ static int __devexit mx2_camera_remove(struct platform_device *pdev)
>> >>
>> >>       vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx);
>> >>
>> >> -     if (cpu_is_mx27()) {
>> >> +     if (is_imx27_camera(pcdev)) {
>> >>               clk_disable_unprepare(pcdev->clk_emma_ipg);
>> >>               clk_disable_unprepare(pcdev->clk_emma_ahb);
>> >>       }
>> >> @@ -1794,6 +1840,7 @@ static struct platform_driver mx2_camera_driver = {
>> >>       .driver         = {
>> >>               .name   = MX2_CAM_DRV_NAME,
>> >>       },
>> >> +     .id_table       = mx2_camera_devtype,
>> >>       .remove         = __devexit_p(mx2_camera_remove),
>> >>  };
>> >>
>> >> --
>> >> 1.7.9.5
>>
>> I can't test this patch because it depends heavily on the previous
>> one, which breaks the driver.
>>
>> Regards.
>>
>> --
>> Javier Martin
>> Vista Silicon S.L.
>> CDTUC - FASE C - Oficina S-345
>> Avda de los Castros s/n
>> 39005- Santander. Cantabria. Spain
>> +34 942 25 32 60
>> www.vista-silicon.com
>>
>
> ---
> Guennadi Liakhovetski, Ph.D.
> Freelance Open-Source Software Developer
> http://www.open-technology.de/
> --
> To unsubscribe from this list: send the line "unsubscribe linux-media" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
Mauro Carvalho Chehab - Sept. 27, 2012, 7:36 a.m.
Em 18-09-2012 05:35, javier Martin escreveu:
> On 17 September 2012 15:59, Guennadi Liakhovetski <g.liakhovetski@gmx.de> wrote:
>> On Mon, 17 Sep 2012, javier Martin wrote:
>>
>>> Hi Shawn,
>>>
>>> On 17 September 2012 11:21, Guennadi Liakhovetski <g.liakhovetski@gmx.de> wrote:
>>>> On Mon, 17 Sep 2012, Shawn Guo wrote:
>>>>
>>>>> It changes the driver to use platform_device_id rather than cpu_is_xxx
>>>>> to determine the controller type, and updates the platform code
>>>>> accordingly.
>>>>>
>>>>> As the result, mach/hardware.h inclusion gets removed from the driver.
>>>>>
>>>>> Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
>>>>> Cc: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
>>>>> Cc: linux-media@vger.kernel.org
>>>>
> 
> Tested-by: Javier Martin <javier.martin@vista-silicon.com>

I'm understanding that this patch will flow through arm tree[1]. So:
Acked-by: Mauro Carvalho Chehab <mchehab@redhat.com>

[1] if you understand otherwise, I can apply it via my tree as well

> 
>>>> Acked-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
>>>
>>> i.MX25 support is broken and is scheduled for removal.
>>
>> It is not yet, I haven't pushed those your patches yet.
>>
>> Thanks
>> Guennadi
>>
>>> I think we should not keep on trying to maintain it. Couldn't we just
>>> drop it? It only makes maintenance tasks more difficult.
>>>
>>>> Thanks
>>>> Guennadi
>>>>
>>>>> ---
>>>>>  arch/arm/mach-imx/clk-imx25.c                   |    6 +-
>>>>>  arch/arm/mach-imx/clk-imx27.c                   |    6 +-
>>>>>  arch/arm/mach-imx/devices/devices-common.h      |    1 +
>>>>>  arch/arm/mach-imx/devices/platform-mx2-camera.c |   12 +--
>>>>>  drivers/media/video/mx2_camera.c                |   95 +++++++++++++++++------
>>>>>  5 files changed, 85 insertions(+), 35 deletions(-)
>>>>>
>>>>> diff --git a/arch/arm/mach-imx/clk-imx25.c b/arch/arm/mach-imx/clk-imx25.c
>>>>> index 1aea073..71fe521 100644
>>>>> --- a/arch/arm/mach-imx/clk-imx25.c
>>>>> +++ b/arch/arm/mach-imx/clk-imx25.c
>>>>> @@ -231,9 +231,9 @@ int __init mx25_clocks_init(void)
>>>>>       clk_register_clkdev(clk[esdhc2_ipg_per], "per", "sdhci-esdhc-imx25.1");
>>>>>       clk_register_clkdev(clk[esdhc2_ipg], "ipg", "sdhci-esdhc-imx25.1");
>>>>>       clk_register_clkdev(clk[esdhc2_ahb], "ahb", "sdhci-esdhc-imx25.1");
>>>>> -     clk_register_clkdev(clk[csi_ipg_per], "per", "mx2-camera.0");
>>>>> -     clk_register_clkdev(clk[csi_ipg], "ipg", "mx2-camera.0");
>>>>> -     clk_register_clkdev(clk[csi_ahb], "ahb", "mx2-camera.0");
>>>>> +     clk_register_clkdev(clk[csi_ipg_per], "per", "imx25-camera.0");
>>>>> +     clk_register_clkdev(clk[csi_ipg], "ipg", "imx25-camera.0");
>>>>> +     clk_register_clkdev(clk[csi_ahb], "ahb", "imx25-camera.0");
>>>>>       clk_register_clkdev(clk[dummy], "audmux", NULL);
>>>>>       clk_register_clkdev(clk[can1_ipg], NULL, "flexcan.0");
>>>>>       clk_register_clkdev(clk[can2_ipg], NULL, "flexcan.1");
>>>>> diff --git a/arch/arm/mach-imx/clk-imx27.c b/arch/arm/mach-imx/clk-imx27.c
>>>>> index 5ff5cf0..e26de52 100644
>>>>> --- a/arch/arm/mach-imx/clk-imx27.c
>>>>> +++ b/arch/arm/mach-imx/clk-imx27.c
>>>>> @@ -224,7 +224,7 @@ int __init mx27_clocks_init(unsigned long fref)
>>>>>       clk_register_clkdev(clk[per3_gate], "per", "imx-fb.0");
>>>>>       clk_register_clkdev(clk[lcdc_ipg_gate], "ipg", "imx-fb.0");
>>>>>       clk_register_clkdev(clk[lcdc_ahb_gate], "ahb", "imx-fb.0");
>>>>> -     clk_register_clkdev(clk[csi_ahb_gate], "ahb", "mx2-camera.0");
>>>>> +     clk_register_clkdev(clk[csi_ahb_gate], "ahb", "imx27-camera.0");
>>>>>       clk_register_clkdev(clk[usb_div], "per", "fsl-usb2-udc");
>>>>>       clk_register_clkdev(clk[usb_ipg_gate], "ipg", "fsl-usb2-udc");
>>>>>       clk_register_clkdev(clk[usb_ahb_gate], "ahb", "fsl-usb2-udc");
>>>>> @@ -251,8 +251,8 @@ int __init mx27_clocks_init(unsigned long fref)
>>>>>       clk_register_clkdev(clk[i2c2_ipg_gate], NULL, "imx21-i2c.1");
>>>>>       clk_register_clkdev(clk[owire_ipg_gate], NULL, "mxc_w1.0");
>>>>>       clk_register_clkdev(clk[kpp_ipg_gate], NULL, "imx-keypad");
>>>>> -     clk_register_clkdev(clk[emma_ahb_gate], "emma-ahb", "mx2-camera.0");
>>>>> -     clk_register_clkdev(clk[emma_ipg_gate], "emma-ipg", "mx2-camera.0");
>>>>> +     clk_register_clkdev(clk[emma_ahb_gate], "emma-ahb", "imx27-camera.0");
>>>>> +     clk_register_clkdev(clk[emma_ipg_gate], "emma-ipg", "imx27-camera.0");
>>>>>       clk_register_clkdev(clk[emma_ahb_gate], "ahb", "m2m-emmaprp.0");
>>>>>       clk_register_clkdev(clk[emma_ipg_gate], "ipg", "m2m-emmaprp.0");
>>>>>       clk_register_clkdev(clk[iim_ipg_gate], "iim", NULL);
>>>>> diff --git a/arch/arm/mach-imx/devices/devices-common.h b/arch/arm/mach-imx/devices/devices-common.h
>>>>> index 7f2698c..8112a1a 100644
>>>>> --- a/arch/arm/mach-imx/devices/devices-common.h
>>>>> +++ b/arch/arm/mach-imx/devices/devices-common.h
>>>>> @@ -202,6 +202,7 @@ struct platform_device *__init imx_add_mx3_sdc_fb(
>>>>>
>>>>>  #include <linux/platform_data/camera-mx2.h>
>>>>>  struct imx_mx2_camera_data {
>>>>> +     const char *devid;
>>>>>       resource_size_t iobasecsi;
>>>>>       resource_size_t iosizecsi;
>>>>>       resource_size_t irqcsi;
>>>>> diff --git a/arch/arm/mach-imx/devices/platform-mx2-camera.c b/arch/arm/mach-imx/devices/platform-mx2-camera.c
>>>>> index 9ad5b2d..b88877d 100644
>>>>> --- a/arch/arm/mach-imx/devices/platform-mx2-camera.c
>>>>> +++ b/arch/arm/mach-imx/devices/platform-mx2-camera.c
>>>>> @@ -9,14 +9,16 @@
>>>>>  #include <mach/hardware.h>
>>>>>  #include "devices-common.h"
>>>>>
>>>>> -#define imx_mx2_camera_data_entry_single(soc)                                \
>>>>> +#define imx_mx2_camera_data_entry_single(soc, _devid)                        \
>>>>>       {                                                               \
>>>>> +             .devid = _devid,                                        \
>>>>>               .iobasecsi = soc ## _CSI_BASE_ADDR,                     \
>>>>>               .iosizecsi = SZ_4K,                                     \
>>>>>               .irqcsi = soc ## _INT_CSI,                              \
>>>>>       }
>>>>> -#define imx_mx2_camera_data_entry_single_emma(soc)                   \
>>>>> +#define imx_mx2_camera_data_entry_single_emma(soc, _devid)           \
>>>>>       {                                                               \
>>>>> +             .devid = _devid,                                        \
>>>>>               .iobasecsi = soc ## _CSI_BASE_ADDR,                     \
>>>>>               .iosizecsi = SZ_32,                                     \
>>>>>               .irqcsi = soc ## _INT_CSI,                              \
>>>>> @@ -27,12 +29,12 @@
>>>>>
>>>>>  #ifdef CONFIG_SOC_IMX25
>>>>>  const struct imx_mx2_camera_data imx25_mx2_camera_data __initconst =
>>>>> -     imx_mx2_camera_data_entry_single(MX25);
>>>>> +     imx_mx2_camera_data_entry_single(MX25, "imx25-camera");
>>>>>  #endif /* ifdef CONFIG_SOC_IMX25 */
>>>>>
>>>>>  #ifdef CONFIG_SOC_IMX27
>>>>>  const struct imx_mx2_camera_data imx27_mx2_camera_data __initconst =
>>>>> -     imx_mx2_camera_data_entry_single_emma(MX27);
>>>>> +     imx_mx2_camera_data_entry_single_emma(MX27, "imx27-camera");
>>>>>  #endif /* ifdef CONFIG_SOC_IMX27 */
>>>>>
>>>>>  struct platform_device *__init imx_add_mx2_camera(
>>>>> @@ -58,7 +60,7 @@ struct platform_device *__init imx_add_mx2_camera(
>>>>>                       .flags = IORESOURCE_IRQ,
>>>>>               },
>>>>>       };
>>>>> -     return imx_add_platform_device_dmamask("mx2-camera", 0,
>>>>> +     return imx_add_platform_device_dmamask(data->devid, 0,
>>>>>                       res, data->iobaseemmaprp ? 4 : 2,
>>>>>                       pdata, sizeof(*pdata), DMA_BIT_MASK(32));
>>>>>  }
>>>>> diff --git a/drivers/media/video/mx2_camera.c b/drivers/media/video/mx2_camera.c
>>>>> index fe4c76c..cde3374 100644
>>>>> --- a/drivers/media/video/mx2_camera.c
>>>>> +++ b/drivers/media/video/mx2_camera.c
>>>>> @@ -41,7 +41,6 @@
>>>>>  #include <linux/videodev2.h>
>>>>>
>>>>>  #include <linux/platform_data/camera-mx2.h>
>>>>> -#include <mach/hardware.h>
>>>>>
>>>>>  #include <asm/dma.h>
>>>>>
>>>>> @@ -121,11 +120,13 @@
>>>>>
>>>>>  #define CSICR1                       0x00
>>>>>  #define CSICR2                       0x04
>>>>> -#define CSISR                        (cpu_is_mx27() ? 0x08 : 0x18)
>>>>> +#define CSISR_IMX25          0x18
>>>>> +#define CSISR_IMX27          0x08
>>>>>  #define CSISTATFIFO          0x0c
>>>>>  #define CSIRFIFO             0x10
>>>>>  #define CSIRXCNT             0x14
>>>>> -#define CSICR3                       (cpu_is_mx27() ? 0x1C : 0x08)
>>>>> +#define CSICR3_IMX25         0x08
>>>>> +#define CSICR3_IMX27         0x1c
>>>>>  #define CSIDMASA_STATFIFO    0x20
>>>>>  #define CSIDMATA_STATFIFO    0x24
>>>>>  #define CSIDMASA_FB1         0x28
>>>>> @@ -268,6 +269,11 @@ struct mx2_buffer {
>>>>>       struct mx2_buf_internal         internal;
>>>>>  };
>>>>>
>>>>> +enum mx2_camera_type {
>>>>> +     IMX25_CAMERA,
>>>>> +     IMX27_CAMERA,
>>>>> +};
>>>>> +
>>>>>  struct mx2_camera_dev {
>>>>>       struct device           *dev;
>>>>>       struct soc_camera_host  soc_host;
>>>>> @@ -291,6 +297,9 @@ struct mx2_camera_dev {
>>>>>       struct mx2_buffer       *fb2_active;
>>>>>
>>>>>       u32                     csicr1;
>>>>> +     u32                     reg_csisr;
>>>>> +     u32                     reg_csicr3;
>>>>> +     enum mx2_camera_type    devtype;
>>>>>
>>>>>       struct mx2_buf_internal buf_discard[2];
>>>>>       void                    *discard_buffer;
>>>>> @@ -303,6 +312,29 @@ struct mx2_camera_dev {
>>>>>       struct vb2_alloc_ctx    *alloc_ctx;
>>>>>  };
>>>>>
>>>>> +static struct platform_device_id mx2_camera_devtype[] = {
>>>>> +     {
>>>>> +             .name = "imx25-camera",
>>>>> +             .driver_data = IMX25_CAMERA,
>>>>> +     }, {
>>>>> +             .name = "imx27-camera",
>>>>> +             .driver_data = IMX27_CAMERA,
>>>>> +     }, {
>>>>> +             /* sentinel */
>>>>> +     }
>>>>> +};
>>>>> +MODULE_DEVICE_TABLE(platform, mx2_camera_devtype);
>>>>> +
>>>>> +static inline int is_imx25_camera(struct mx2_camera_dev *pcdev)
>>>>> +{
>>>>> +     return pcdev->devtype == IMX25_CAMERA;
>>>>> +}
>>>>> +
>>>>> +static inline int is_imx27_camera(struct mx2_camera_dev *pcdev)
>>>>> +{
>>>>> +     return pcdev->devtype == IMX27_CAMERA;
>>>>> +}
>>>>> +
>>>>>  static struct mx2_buffer *mx2_ibuf_to_buf(struct mx2_buf_internal *int_buf)
>>>>>  {
>>>>>       return container_of(int_buf, struct mx2_buffer, internal);
>>>>> @@ -406,9 +438,9 @@ static void mx2_camera_deactivate(struct mx2_camera_dev *pcdev)
>>>>>
>>>>>       clk_disable_unprepare(pcdev->clk_csi);
>>>>>       writel(0, pcdev->base_csi + CSICR1);
>>>>> -     if (cpu_is_mx27()) {
>>>>> +     if (is_imx27_camera(pcdev)) {
>>>>>               writel(0, pcdev->base_emma + PRP_CNTL);
>>>>> -     } else if (cpu_is_mx25()) {
>>>>> +     } else if (is_imx25_camera(pcdev)) {
>>>>>               spin_lock_irqsave(&pcdev->lock, flags);
>>>>>               pcdev->fb1_active = NULL;
>>>>>               pcdev->fb2_active = NULL;
>>>>> @@ -438,7 +470,7 @@ static int mx2_camera_add_device(struct soc_camera_device *icd)
>>>>>
>>>>>       csicr1 = CSICR1_MCLKEN;
>>>>>
>>>>> -     if (cpu_is_mx27())
>>>>> +     if (is_imx27_camera(pcdev))
>>>>>               csicr1 |= CSICR1_PRP_IF_EN | CSICR1_FCC |
>>>>>                       CSICR1_RXFF_LEVEL(0);
>>>>>
>>>>> @@ -514,7 +546,7 @@ out:
>>>>>  static irqreturn_t mx25_camera_irq(int irq_csi, void *data)
>>>>>  {
>>>>>       struct mx2_camera_dev *pcdev = data;
>>>>> -     u32 status = readl(pcdev->base_csi + CSISR);
>>>>> +     u32 status = readl(pcdev->base_csi + pcdev->reg_csisr);
>>>>>
>>>>>       if (status & CSISR_DMA_TSF_FB1_INT)
>>>>>               mx25_camera_frame_done(pcdev, 1, MX2_STATE_DONE);
>>>>> @@ -523,7 +555,7 @@ static irqreturn_t mx25_camera_irq(int irq_csi, void *data)
>>>>>
>>>>>       /* FIXME: handle CSISR_RFF_OR_INT */
>>>>>
>>>>> -     writel(status, pcdev->base_csi + CSISR);
>>>>> +     writel(status, pcdev->base_csi + pcdev->reg_csisr);
>>>>>
>>>>>       return IRQ_HANDLED;
>>>>>  }
>>>>> @@ -608,7 +640,7 @@ static void mx2_videobuf_queue(struct vb2_buffer *vb)
>>>>>       buf->state = MX2_STATE_QUEUED;
>>>>>       list_add_tail(&buf->internal.queue, &pcdev->capture);
>>>>>
>>>>> -     if (cpu_is_mx25()) {
>>>>> +     if (is_imx25_camera(pcdev)) {
>>>>>               u32 csicr3, dma_inten = 0;
>>>>>
>>>>>               if (pcdev->fb1_active == NULL) {
>>>>> @@ -627,20 +659,20 @@ static void mx2_videobuf_queue(struct vb2_buffer *vb)
>>>>>                       list_del(&buf->internal.queue);
>>>>>                       buf->state = MX2_STATE_ACTIVE;
>>>>>
>>>>> -                     csicr3 = readl(pcdev->base_csi + CSICR3);
>>>>> +                     csicr3 = readl(pcdev->base_csi + pcdev->reg_csicr3);
>>>>>
>>>>>                       /* Reflash DMA */
>>>>>                       writel(csicr3 | CSICR3_DMA_REFLASH_RFF,
>>>>> -                                     pcdev->base_csi + CSICR3);
>>>>> +                                     pcdev->base_csi + pcdev->reg_csicr3);
>>>>>
>>>>>                       /* clear & enable interrupts */
>>>>> -                     writel(dma_inten, pcdev->base_csi + CSISR);
>>>>> +                     writel(dma_inten, pcdev->base_csi + pcdev->reg_csisr);
>>>>>                       pcdev->csicr1 |= dma_inten;
>>>>>                       writel(pcdev->csicr1, pcdev->base_csi + CSICR1);
>>>>>
>>>>>                       /* enable DMA */
>>>>>                       csicr3 |= CSICR3_DMA_REQ_EN_RFF | CSICR3_RXFF_LEVEL(1);
>>>>> -                     writel(csicr3, pcdev->base_csi + CSICR3);
>>>>> +                     writel(csicr3, pcdev->base_csi + pcdev->reg_csicr3);
>>>>>               }
>>>>>       }
>>>>>
>>>>> @@ -684,7 +716,7 @@ static void mx2_videobuf_release(struct vb2_buffer *vb)
>>>>>        */
>>>>>
>>>>>       spin_lock_irqsave(&pcdev->lock, flags);
>>>>> -     if (cpu_is_mx25() && buf->state == MX2_STATE_ACTIVE) {
>>>>> +     if (is_imx25_camera(pcdev) && buf->state == MX2_STATE_ACTIVE) {
>>>>>               if (pcdev->fb1_active == buf) {
>>>>>                       pcdev->csicr1 &= ~CSICR1_FB1_DMA_INTEN;
>>>>>                       writel(0, pcdev->base_csi + CSIDMASA_FB1);
>>>>> @@ -807,7 +839,7 @@ static int mx2_start_streaming(struct vb2_queue *q, unsigned int count)
>>>>>       unsigned long phys;
>>>>>       int bytesperline;
>>>>>
>>>>> -     if (cpu_is_mx27()) {
>>>>> +     if (is_imx27_camera(pcdev)) {
>>>>>               unsigned long flags;
>>>>>               if (count < 2)
>>>>>                       return -EINVAL;
>>>>> @@ -902,7 +934,7 @@ static int mx2_stop_streaming(struct vb2_queue *q)
>>>>>       void *b;
>>>>>       u32 cntl;
>>>>>
>>>>> -     if (cpu_is_mx27()) {
>>>>> +     if (is_imx27_camera(pcdev)) {
>>>>>               spin_lock_irqsave(&pcdev->lock, flags);
>>>>>
>>>>>               cntl = readl(pcdev->base_emma + PRP_CNTL);
>>>>> @@ -1054,11 +1086,11 @@ static int mx2_camera_set_bus_param(struct soc_camera_device *icd)
>>>>>       if (bytesperline < 0)
>>>>>               return bytesperline;
>>>>>
>>>>> -     if (cpu_is_mx27()) {
>>>>> +     if (is_imx27_camera(pcdev)) {
>>>>>               ret = mx27_camera_emma_prp_reset(pcdev);
>>>>>               if (ret)
>>>>>                       return ret;
>>>>> -     } else if (cpu_is_mx25()) {
>>>>> +     } else if (is_imx25_camera(pcdev)) {
>>>>>               writel((bytesperline * icd->user_height) >> 2,
>>>>>                               pcdev->base_csi + CSIRXCNT);
>>>>>               writel((bytesperline << 16) | icd->user_height,
>>>>> @@ -1351,7 +1383,7 @@ static int mx2_camera_try_fmt(struct soc_camera_device *icd,
>>>>>       /* FIXME: implement MX27 limits */
>>>>>
>>>>>       /* limit to MX25 hardware capabilities */
>>>>> -     if (cpu_is_mx25()) {
>>>>> +     if (is_imx25_camera(pcdev)) {
>>>>>               if (xlate->host_fmt->bits_per_sample <= 8)
>>>>>                       width_limit = 0xffff * 4;
>>>>>               else
>>>>> @@ -1685,6 +1717,20 @@ static int __devinit mx2_camera_probe(struct platform_device *pdev)
>>>>>               goto exit;
>>>>>       }
>>>>>
>>>>> +     pcdev->devtype = pdev->id_entry->driver_data;
>>>>> +     switch (pcdev->devtype) {
>>>>> +     case IMX25_CAMERA:
>>>>> +             pcdev->reg_csisr = CSISR_IMX25;
>>>>> +             pcdev->reg_csicr3 = CSICR3_IMX25;
>>>>> +             break;
>>>>> +     case IMX27_CAMERA:
>>>>> +             pcdev->reg_csisr = CSISR_IMX27;
>>>>> +             pcdev->reg_csicr3 = CSICR3_IMX27;
>>>>> +             break;
>>>>> +     default:
>>>>> +             break;
>>>>> +     }
>>>>> +
>>>>>       pcdev->clk_csi = devm_clk_get(&pdev->dev, "ahb");
>>>>>       if (IS_ERR(pcdev->clk_csi)) {
>>>>>               dev_err(&pdev->dev, "Could not get csi clock\n");
>>>>> @@ -1722,7 +1768,7 @@ static int __devinit mx2_camera_probe(struct platform_device *pdev)
>>>>>       pcdev->dev = &pdev->dev;
>>>>>       platform_set_drvdata(pdev, pcdev);
>>>>>
>>>>> -     if (cpu_is_mx25()) {
>>>>> +     if (is_imx25_camera(pcdev)) {
>>>>>               err = devm_request_irq(&pdev->dev, irq_csi, mx25_camera_irq, 0,
>>>>>                                      MX2_CAM_DRV_NAME, pcdev);
>>>>>               if (err) {
>>>>> @@ -1731,7 +1777,7 @@ static int __devinit mx2_camera_probe(struct platform_device *pdev)
>>>>>               }
>>>>>       }
>>>>>
>>>>> -     if (cpu_is_mx27()) {
>>>>> +     if (is_imx27_camera(pcdev)) {
>>>>>               err = mx27_camera_emma_init(pdev);
>>>>>               if (err)
>>>>>                       goto exit;
>>>>> @@ -1742,7 +1788,7 @@ static int __devinit mx2_camera_probe(struct platform_device *pdev)
>>>>>       pcdev->soc_host.priv            = pcdev;
>>>>>       pcdev->soc_host.v4l2_dev.dev    = &pdev->dev;
>>>>>       pcdev->soc_host.nr              = pdev->id;
>>>>> -     if (cpu_is_mx25())
>>>>> +     if (is_imx25_camera(pcdev))
>>>>>               pcdev->soc_host.capabilities = SOCAM_HOST_CAP_STRIDE;
>>>>>
>>>>>       pcdev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
>>>>> @@ -1762,7 +1808,7 @@ static int __devinit mx2_camera_probe(struct platform_device *pdev)
>>>>>  exit_free_emma:
>>>>>       vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx);
>>>>>  eallocctx:
>>>>> -     if (cpu_is_mx27()) {
>>>>> +     if (is_imx27_camera(pcdev)) {
>>>>>               clk_disable_unprepare(pcdev->clk_emma_ipg);
>>>>>               clk_disable_unprepare(pcdev->clk_emma_ahb);
>>>>>       }
>>>>> @@ -1780,7 +1826,7 @@ static int __devexit mx2_camera_remove(struct platform_device *pdev)
>>>>>
>>>>>       vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx);
>>>>>
>>>>> -     if (cpu_is_mx27()) {
>>>>> +     if (is_imx27_camera(pcdev)) {
>>>>>               clk_disable_unprepare(pcdev->clk_emma_ipg);
>>>>>               clk_disable_unprepare(pcdev->clk_emma_ahb);
>>>>>       }
>>>>> @@ -1794,6 +1840,7 @@ static struct platform_driver mx2_camera_driver = {
>>>>>       .driver         = {
>>>>>               .name   = MX2_CAM_DRV_NAME,
>>>>>       },
>>>>> +     .id_table       = mx2_camera_devtype,
>>>>>       .remove         = __devexit_p(mx2_camera_remove),
>>>>>  };
>>>>>
>>>>> --
>>>>> 1.7.9.5
>>>
>>> I can't test this patch because it depends heavily on the previous
>>> one, which breaks the driver.
>>>
>>> Regards.
>>>
>>> --
>>> Javier Martin
>>> Vista Silicon S.L.
>>> CDTUC - FASE C - Oficina S-345
>>> Avda de los Castros s/n
>>> 39005- Santander. Cantabria. Spain
>>> +34 942 25 32 60
>>> www.vista-silicon.com
>>>
>>
>> ---
>> Guennadi Liakhovetski, Ph.D.
>> Freelance Open-Source Software Developer
>> http://www.open-technology.de/
>> --
>> To unsubscribe from this list: send the line "unsubscribe linux-media" in
>> the body of a message to majordomo@vger.kernel.org
>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> 
> 
>
Shawn Guo - Oct. 6, 2012, 8:16 a.m.
On Thu, Sep 27, 2012 at 04:36:56AM -0300, Mauro Carvalho Chehab wrote:
> I'm understanding that this patch will flow through arm tree[1]. So:

Yes, it will go through arm-soc tree for 3.8.

> Acked-by: Mauro Carvalho Chehab <mchehab@redhat.com>
> 
Thanks, Mauro.

Shawn

Patch

diff --git a/arch/arm/mach-imx/clk-imx25.c b/arch/arm/mach-imx/clk-imx25.c
index 1aea073..71fe521 100644
--- a/arch/arm/mach-imx/clk-imx25.c
+++ b/arch/arm/mach-imx/clk-imx25.c
@@ -231,9 +231,9 @@  int __init mx25_clocks_init(void)
 	clk_register_clkdev(clk[esdhc2_ipg_per], "per", "sdhci-esdhc-imx25.1");
 	clk_register_clkdev(clk[esdhc2_ipg], "ipg", "sdhci-esdhc-imx25.1");
 	clk_register_clkdev(clk[esdhc2_ahb], "ahb", "sdhci-esdhc-imx25.1");
-	clk_register_clkdev(clk[csi_ipg_per], "per", "mx2-camera.0");
-	clk_register_clkdev(clk[csi_ipg], "ipg", "mx2-camera.0");
-	clk_register_clkdev(clk[csi_ahb], "ahb", "mx2-camera.0");
+	clk_register_clkdev(clk[csi_ipg_per], "per", "imx25-camera.0");
+	clk_register_clkdev(clk[csi_ipg], "ipg", "imx25-camera.0");
+	clk_register_clkdev(clk[csi_ahb], "ahb", "imx25-camera.0");
 	clk_register_clkdev(clk[dummy], "audmux", NULL);
 	clk_register_clkdev(clk[can1_ipg], NULL, "flexcan.0");
 	clk_register_clkdev(clk[can2_ipg], NULL, "flexcan.1");
diff --git a/arch/arm/mach-imx/clk-imx27.c b/arch/arm/mach-imx/clk-imx27.c
index 5ff5cf0..e26de52 100644
--- a/arch/arm/mach-imx/clk-imx27.c
+++ b/arch/arm/mach-imx/clk-imx27.c
@@ -224,7 +224,7 @@  int __init mx27_clocks_init(unsigned long fref)
 	clk_register_clkdev(clk[per3_gate], "per", "imx-fb.0");
 	clk_register_clkdev(clk[lcdc_ipg_gate], "ipg", "imx-fb.0");
 	clk_register_clkdev(clk[lcdc_ahb_gate], "ahb", "imx-fb.0");
-	clk_register_clkdev(clk[csi_ahb_gate], "ahb", "mx2-camera.0");
+	clk_register_clkdev(clk[csi_ahb_gate], "ahb", "imx27-camera.0");
 	clk_register_clkdev(clk[usb_div], "per", "fsl-usb2-udc");
 	clk_register_clkdev(clk[usb_ipg_gate], "ipg", "fsl-usb2-udc");
 	clk_register_clkdev(clk[usb_ahb_gate], "ahb", "fsl-usb2-udc");
@@ -251,8 +251,8 @@  int __init mx27_clocks_init(unsigned long fref)
 	clk_register_clkdev(clk[i2c2_ipg_gate], NULL, "imx21-i2c.1");
 	clk_register_clkdev(clk[owire_ipg_gate], NULL, "mxc_w1.0");
 	clk_register_clkdev(clk[kpp_ipg_gate], NULL, "imx-keypad");
-	clk_register_clkdev(clk[emma_ahb_gate], "emma-ahb", "mx2-camera.0");
-	clk_register_clkdev(clk[emma_ipg_gate], "emma-ipg", "mx2-camera.0");
+	clk_register_clkdev(clk[emma_ahb_gate], "emma-ahb", "imx27-camera.0");
+	clk_register_clkdev(clk[emma_ipg_gate], "emma-ipg", "imx27-camera.0");
 	clk_register_clkdev(clk[emma_ahb_gate], "ahb", "m2m-emmaprp.0");
 	clk_register_clkdev(clk[emma_ipg_gate], "ipg", "m2m-emmaprp.0");
 	clk_register_clkdev(clk[iim_ipg_gate], "iim", NULL);
diff --git a/arch/arm/mach-imx/devices/devices-common.h b/arch/arm/mach-imx/devices/devices-common.h
index 7f2698c..8112a1a 100644
--- a/arch/arm/mach-imx/devices/devices-common.h
+++ b/arch/arm/mach-imx/devices/devices-common.h
@@ -202,6 +202,7 @@  struct platform_device *__init imx_add_mx3_sdc_fb(
 
 #include <linux/platform_data/camera-mx2.h>
 struct imx_mx2_camera_data {
+	const char *devid;
 	resource_size_t iobasecsi;
 	resource_size_t iosizecsi;
 	resource_size_t irqcsi;
diff --git a/arch/arm/mach-imx/devices/platform-mx2-camera.c b/arch/arm/mach-imx/devices/platform-mx2-camera.c
index 9ad5b2d..b88877d 100644
--- a/arch/arm/mach-imx/devices/platform-mx2-camera.c
+++ b/arch/arm/mach-imx/devices/platform-mx2-camera.c
@@ -9,14 +9,16 @@ 
 #include <mach/hardware.h>
 #include "devices-common.h"
 
-#define imx_mx2_camera_data_entry_single(soc)				\
+#define imx_mx2_camera_data_entry_single(soc, _devid)			\
 	{								\
+		.devid = _devid,					\
 		.iobasecsi = soc ## _CSI_BASE_ADDR,			\
 		.iosizecsi = SZ_4K,					\
 		.irqcsi = soc ## _INT_CSI,				\
 	}
-#define imx_mx2_camera_data_entry_single_emma(soc)			\
+#define imx_mx2_camera_data_entry_single_emma(soc, _devid)		\
 	{								\
+		.devid = _devid,					\
 		.iobasecsi = soc ## _CSI_BASE_ADDR,			\
 		.iosizecsi = SZ_32,					\
 		.irqcsi = soc ## _INT_CSI,				\
@@ -27,12 +29,12 @@ 
 
 #ifdef CONFIG_SOC_IMX25
 const struct imx_mx2_camera_data imx25_mx2_camera_data __initconst =
-	imx_mx2_camera_data_entry_single(MX25);
+	imx_mx2_camera_data_entry_single(MX25, "imx25-camera");
 #endif /* ifdef CONFIG_SOC_IMX25 */
 
 #ifdef CONFIG_SOC_IMX27
 const struct imx_mx2_camera_data imx27_mx2_camera_data __initconst =
-	imx_mx2_camera_data_entry_single_emma(MX27);
+	imx_mx2_camera_data_entry_single_emma(MX27, "imx27-camera");
 #endif /* ifdef CONFIG_SOC_IMX27 */
 
 struct platform_device *__init imx_add_mx2_camera(
@@ -58,7 +60,7 @@  struct platform_device *__init imx_add_mx2_camera(
 			.flags = IORESOURCE_IRQ,
 		},
 	};
-	return imx_add_platform_device_dmamask("mx2-camera", 0,
+	return imx_add_platform_device_dmamask(data->devid, 0,
 			res, data->iobaseemmaprp ? 4 : 2,
 			pdata, sizeof(*pdata), DMA_BIT_MASK(32));
 }
diff --git a/drivers/media/video/mx2_camera.c b/drivers/media/video/mx2_camera.c
index fe4c76c..cde3374 100644
--- a/drivers/media/video/mx2_camera.c
+++ b/drivers/media/video/mx2_camera.c
@@ -41,7 +41,6 @@ 
 #include <linux/videodev2.h>
 
 #include <linux/platform_data/camera-mx2.h>
-#include <mach/hardware.h>
 
 #include <asm/dma.h>
 
@@ -121,11 +120,13 @@ 
 
 #define CSICR1			0x00
 #define CSICR2			0x04
-#define CSISR			(cpu_is_mx27() ? 0x08 : 0x18)
+#define CSISR_IMX25		0x18
+#define CSISR_IMX27		0x08
 #define CSISTATFIFO		0x0c
 #define CSIRFIFO		0x10
 #define CSIRXCNT		0x14
-#define CSICR3			(cpu_is_mx27() ? 0x1C : 0x08)
+#define CSICR3_IMX25		0x08
+#define CSICR3_IMX27		0x1c
 #define CSIDMASA_STATFIFO	0x20
 #define CSIDMATA_STATFIFO	0x24
 #define CSIDMASA_FB1		0x28
@@ -268,6 +269,11 @@  struct mx2_buffer {
 	struct mx2_buf_internal		internal;
 };
 
+enum mx2_camera_type {
+	IMX25_CAMERA,
+	IMX27_CAMERA,
+};
+
 struct mx2_camera_dev {
 	struct device		*dev;
 	struct soc_camera_host	soc_host;
@@ -291,6 +297,9 @@  struct mx2_camera_dev {
 	struct mx2_buffer	*fb2_active;
 
 	u32			csicr1;
+	u32			reg_csisr;
+	u32			reg_csicr3;
+	enum mx2_camera_type	devtype;
 
 	struct mx2_buf_internal buf_discard[2];
 	void			*discard_buffer;
@@ -303,6 +312,29 @@  struct mx2_camera_dev {
 	struct vb2_alloc_ctx	*alloc_ctx;
 };
 
+static struct platform_device_id mx2_camera_devtype[] = {
+	{
+		.name = "imx25-camera",
+		.driver_data = IMX25_CAMERA,
+	}, {
+		.name = "imx27-camera",
+		.driver_data = IMX27_CAMERA,
+	}, {
+		/* sentinel */
+	}
+};
+MODULE_DEVICE_TABLE(platform, mx2_camera_devtype);
+
+static inline int is_imx25_camera(struct mx2_camera_dev *pcdev)
+{
+	return pcdev->devtype == IMX25_CAMERA;
+}
+
+static inline int is_imx27_camera(struct mx2_camera_dev *pcdev)
+{
+	return pcdev->devtype == IMX27_CAMERA;
+}
+
 static struct mx2_buffer *mx2_ibuf_to_buf(struct mx2_buf_internal *int_buf)
 {
 	return container_of(int_buf, struct mx2_buffer, internal);
@@ -406,9 +438,9 @@  static void mx2_camera_deactivate(struct mx2_camera_dev *pcdev)
 
 	clk_disable_unprepare(pcdev->clk_csi);
 	writel(0, pcdev->base_csi + CSICR1);
-	if (cpu_is_mx27()) {
+	if (is_imx27_camera(pcdev)) {
 		writel(0, pcdev->base_emma + PRP_CNTL);
-	} else if (cpu_is_mx25()) {
+	} else if (is_imx25_camera(pcdev)) {
 		spin_lock_irqsave(&pcdev->lock, flags);
 		pcdev->fb1_active = NULL;
 		pcdev->fb2_active = NULL;
@@ -438,7 +470,7 @@  static int mx2_camera_add_device(struct soc_camera_device *icd)
 
 	csicr1 = CSICR1_MCLKEN;
 
-	if (cpu_is_mx27())
+	if (is_imx27_camera(pcdev))
 		csicr1 |= CSICR1_PRP_IF_EN | CSICR1_FCC |
 			CSICR1_RXFF_LEVEL(0);
 
@@ -514,7 +546,7 @@  out:
 static irqreturn_t mx25_camera_irq(int irq_csi, void *data)
 {
 	struct mx2_camera_dev *pcdev = data;
-	u32 status = readl(pcdev->base_csi + CSISR);
+	u32 status = readl(pcdev->base_csi + pcdev->reg_csisr);
 
 	if (status & CSISR_DMA_TSF_FB1_INT)
 		mx25_camera_frame_done(pcdev, 1, MX2_STATE_DONE);
@@ -523,7 +555,7 @@  static irqreturn_t mx25_camera_irq(int irq_csi, void *data)
 
 	/* FIXME: handle CSISR_RFF_OR_INT */
 
-	writel(status, pcdev->base_csi + CSISR);
+	writel(status, pcdev->base_csi + pcdev->reg_csisr);
 
 	return IRQ_HANDLED;
 }
@@ -608,7 +640,7 @@  static void mx2_videobuf_queue(struct vb2_buffer *vb)
 	buf->state = MX2_STATE_QUEUED;
 	list_add_tail(&buf->internal.queue, &pcdev->capture);
 
-	if (cpu_is_mx25()) {
+	if (is_imx25_camera(pcdev)) {
 		u32 csicr3, dma_inten = 0;
 
 		if (pcdev->fb1_active == NULL) {
@@ -627,20 +659,20 @@  static void mx2_videobuf_queue(struct vb2_buffer *vb)
 			list_del(&buf->internal.queue);
 			buf->state = MX2_STATE_ACTIVE;
 
-			csicr3 = readl(pcdev->base_csi + CSICR3);
+			csicr3 = readl(pcdev->base_csi + pcdev->reg_csicr3);
 
 			/* Reflash DMA */
 			writel(csicr3 | CSICR3_DMA_REFLASH_RFF,
-					pcdev->base_csi + CSICR3);
+					pcdev->base_csi + pcdev->reg_csicr3);
 
 			/* clear & enable interrupts */
-			writel(dma_inten, pcdev->base_csi + CSISR);
+			writel(dma_inten, pcdev->base_csi + pcdev->reg_csisr);
 			pcdev->csicr1 |= dma_inten;
 			writel(pcdev->csicr1, pcdev->base_csi + CSICR1);
 
 			/* enable DMA */
 			csicr3 |= CSICR3_DMA_REQ_EN_RFF | CSICR3_RXFF_LEVEL(1);
-			writel(csicr3, pcdev->base_csi + CSICR3);
+			writel(csicr3, pcdev->base_csi + pcdev->reg_csicr3);
 		}
 	}
 
@@ -684,7 +716,7 @@  static void mx2_videobuf_release(struct vb2_buffer *vb)
 	 */
 
 	spin_lock_irqsave(&pcdev->lock, flags);
-	if (cpu_is_mx25() && buf->state == MX2_STATE_ACTIVE) {
+	if (is_imx25_camera(pcdev) && buf->state == MX2_STATE_ACTIVE) {
 		if (pcdev->fb1_active == buf) {
 			pcdev->csicr1 &= ~CSICR1_FB1_DMA_INTEN;
 			writel(0, pcdev->base_csi + CSIDMASA_FB1);
@@ -807,7 +839,7 @@  static int mx2_start_streaming(struct vb2_queue *q, unsigned int count)
 	unsigned long phys;
 	int bytesperline;
 
-	if (cpu_is_mx27()) {
+	if (is_imx27_camera(pcdev)) {
 		unsigned long flags;
 		if (count < 2)
 			return -EINVAL;
@@ -902,7 +934,7 @@  static int mx2_stop_streaming(struct vb2_queue *q)
 	void *b;
 	u32 cntl;
 
-	if (cpu_is_mx27()) {
+	if (is_imx27_camera(pcdev)) {
 		spin_lock_irqsave(&pcdev->lock, flags);
 
 		cntl = readl(pcdev->base_emma + PRP_CNTL);
@@ -1054,11 +1086,11 @@  static int mx2_camera_set_bus_param(struct soc_camera_device *icd)
 	if (bytesperline < 0)
 		return bytesperline;
 
-	if (cpu_is_mx27()) {
+	if (is_imx27_camera(pcdev)) {
 		ret = mx27_camera_emma_prp_reset(pcdev);
 		if (ret)
 			return ret;
-	} else if (cpu_is_mx25()) {
+	} else if (is_imx25_camera(pcdev)) {
 		writel((bytesperline * icd->user_height) >> 2,
 				pcdev->base_csi + CSIRXCNT);
 		writel((bytesperline << 16) | icd->user_height,
@@ -1351,7 +1383,7 @@  static int mx2_camera_try_fmt(struct soc_camera_device *icd,
 	/* FIXME: implement MX27 limits */
 
 	/* limit to MX25 hardware capabilities */
-	if (cpu_is_mx25()) {
+	if (is_imx25_camera(pcdev)) {
 		if (xlate->host_fmt->bits_per_sample <= 8)
 			width_limit = 0xffff * 4;
 		else
@@ -1685,6 +1717,20 @@  static int __devinit mx2_camera_probe(struct platform_device *pdev)
 		goto exit;
 	}
 
+	pcdev->devtype = pdev->id_entry->driver_data;
+	switch (pcdev->devtype) {
+	case IMX25_CAMERA:
+		pcdev->reg_csisr = CSISR_IMX25;
+		pcdev->reg_csicr3 = CSICR3_IMX25;
+		break;
+	case IMX27_CAMERA:
+		pcdev->reg_csisr = CSISR_IMX27;
+		pcdev->reg_csicr3 = CSICR3_IMX27;
+		break;
+	default:
+		break;
+	}
+
 	pcdev->clk_csi = devm_clk_get(&pdev->dev, "ahb");
 	if (IS_ERR(pcdev->clk_csi)) {
 		dev_err(&pdev->dev, "Could not get csi clock\n");
@@ -1722,7 +1768,7 @@  static int __devinit mx2_camera_probe(struct platform_device *pdev)
 	pcdev->dev = &pdev->dev;
 	platform_set_drvdata(pdev, pcdev);
 
-	if (cpu_is_mx25()) {
+	if (is_imx25_camera(pcdev)) {
 		err = devm_request_irq(&pdev->dev, irq_csi, mx25_camera_irq, 0,
 				       MX2_CAM_DRV_NAME, pcdev);
 		if (err) {
@@ -1731,7 +1777,7 @@  static int __devinit mx2_camera_probe(struct platform_device *pdev)
 		}
 	}
 
-	if (cpu_is_mx27()) {
+	if (is_imx27_camera(pcdev)) {
 		err = mx27_camera_emma_init(pdev);
 		if (err)
 			goto exit;
@@ -1742,7 +1788,7 @@  static int __devinit mx2_camera_probe(struct platform_device *pdev)
 	pcdev->soc_host.priv		= pcdev;
 	pcdev->soc_host.v4l2_dev.dev	= &pdev->dev;
 	pcdev->soc_host.nr		= pdev->id;
-	if (cpu_is_mx25())
+	if (is_imx25_camera(pcdev))
 		pcdev->soc_host.capabilities = SOCAM_HOST_CAP_STRIDE;
 
 	pcdev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
@@ -1762,7 +1808,7 @@  static int __devinit mx2_camera_probe(struct platform_device *pdev)
 exit_free_emma:
 	vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx);
 eallocctx:
-	if (cpu_is_mx27()) {
+	if (is_imx27_camera(pcdev)) {
 		clk_disable_unprepare(pcdev->clk_emma_ipg);
 		clk_disable_unprepare(pcdev->clk_emma_ahb);
 	}
@@ -1780,7 +1826,7 @@  static int __devexit mx2_camera_remove(struct platform_device *pdev)
 
 	vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx);
 
-	if (cpu_is_mx27()) {
+	if (is_imx27_camera(pcdev)) {
 		clk_disable_unprepare(pcdev->clk_emma_ipg);
 		clk_disable_unprepare(pcdev->clk_emma_ahb);
 	}
@@ -1794,6 +1840,7 @@  static struct platform_driver mx2_camera_driver = {
 	.driver 	= {
 		.name	= MX2_CAM_DRV_NAME,
 	},
+	.id_table	= mx2_camera_devtype,
 	.remove		= __devexit_p(mx2_camera_remove),
 };