Patchwork [5/6,V3] atmel/nand: add DT support

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Submitter Jean-Christophe PLAGNIOL-VILLARD
Date Feb. 21, 2012, 9:46 a.m.
Message ID <1329817573-6473-1-git-send-email-plagnioj@jcrosoft.com>
Download mbox | patch
Permalink /patch/142276/
State New
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Comments

Jean-Christophe PLAGNIOL-VILLARD - Feb. 21, 2012, 9:46 a.m.
Use a local copy of board informatin and fill with DT data.

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Cc: Nicolas Ferre <nicolas.ferre@atmel.com>
Cc: devicetree-discuss@lists.ozlabs.org
Cc: linux-mtd@lists.infradead.org
---
v3:

	protect against !CONFIG_OF

Best Regards,
J.
 .../devicetree/bindings/mtd/atmel-nand.txt         |   41 +++++++
 arch/arm/boot/dts/at91sam9g20.dtsi                 |   17 +++
 arch/arm/boot/dts/at91sam9g45.dtsi                 |   17 +++
 arch/arm/boot/dts/at91sam9m10g45ek.dts             |   26 +++++-
 arch/arm/boot/dts/usb_a9g20.dts                    |   46 ++++++++-
 arch/arm/mach-at91/at91sam9x5.c                    |    5 -
 arch/arm/mach-at91/board-dt.c                      |   52 ---------
 drivers/mtd/nand/atmel_nand.c                      |  113 ++++++++++++++++----
 8 files changed, 238 insertions(+), 79 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/mtd/atmel-nand.txt
Nicolas Ferre - Feb. 21, 2012, 9:59 a.m.
On 02/21/2012 10:46 AM, Jean-Christophe PLAGNIOL-VILLARD :
> Use a local copy of board informatin and fill with DT data.
> 
> Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
> Acked-by: Grant Likely <grant.likely@secretlab.ca>
> Cc: Nicolas Ferre <nicolas.ferre@atmel.com>
> Cc: devicetree-discuss@lists.ozlabs.org
> Cc: linux-mtd@lists.infradead.org
> ---
> v3:
> 
> 	protect against !CONFIG_OF
> 
> Best Regards,
> J.
>  .../devicetree/bindings/mtd/atmel-nand.txt         |   41 +++++++
>  arch/arm/boot/dts/at91sam9g20.dtsi                 |   17 +++
>  arch/arm/boot/dts/at91sam9g45.dtsi                 |   17 +++
>  arch/arm/boot/dts/at91sam9m10g45ek.dts             |   26 +++++-
>  arch/arm/boot/dts/usb_a9g20.dts                    |   46 ++++++++-
>  arch/arm/mach-at91/at91sam9x5.c                    |    5 -

As we will put this series on top of 9x5, we may also add the entries in
at91sam9x5.dtsi / at91sam9x5cm.dtsi ...

>  arch/arm/mach-at91/board-dt.c                      |   52 ---------
>  drivers/mtd/nand/atmel_nand.c                      |  113 ++++++++++++++++----
>  8 files changed, 238 insertions(+), 79 deletions(-)
>  create mode 100644 Documentation/devicetree/bindings/mtd/atmel-nand.txt

Otherwise,

Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>

Bye,
Jean-Christophe PLAGNIOL-VILLARD - Feb. 21, 2012, 11 a.m.
On 10:59 Tue 21 Feb     , Nicolas Ferre wrote:
> On 02/21/2012 10:46 AM, Jean-Christophe PLAGNIOL-VILLARD :
> > Use a local copy of board informatin and fill with DT data.
> > 
> > Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
> > Acked-by: Grant Likely <grant.likely@secretlab.ca>
> > Cc: Nicolas Ferre <nicolas.ferre@atmel.com>
> > Cc: devicetree-discuss@lists.ozlabs.org
> > Cc: linux-mtd@lists.infradead.org
> > ---
> > v3:
> > 
> > 	protect against !CONFIG_OF
> > 
> > Best Regards,
> > J.
> >  .../devicetree/bindings/mtd/atmel-nand.txt         |   41 +++++++
> >  arch/arm/boot/dts/at91sam9g20.dtsi                 |   17 +++
> >  arch/arm/boot/dts/at91sam9g45.dtsi                 |   17 +++
> >  arch/arm/boot/dts/at91sam9m10g45ek.dts             |   26 +++++-
> >  arch/arm/boot/dts/usb_a9g20.dts                    |   46 ++++++++-
> >  arch/arm/mach-at91/at91sam9x5.c                    |    5 -
> 
> As we will put this series on top of 9x5, we may also add the entries in
> at91sam9x5.dtsi / at91sam9x5cm.dtsi ...
will add the sam9x5 support on an other patch

Best Regards,
J.
> 
> >  arch/arm/mach-at91/board-dt.c                      |   52 ---------
> >  drivers/mtd/nand/atmel_nand.c                      |  113 ++++++++++++++++----
> >  8 files changed, 238 insertions(+), 79 deletions(-)
> >  create mode 100644 Documentation/devicetree/bindings/mtd/atmel-nand.txt
> 
> Otherwise,
> 
> Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
> 
> Bye,
> -- 
> Nicolas Ferre
> 
> _______________________________________________
> linux-arm-kernel mailing list
> linux-arm-kernel@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

Patch

diff --git a/Documentation/devicetree/bindings/mtd/atmel-nand.txt b/Documentation/devicetree/bindings/mtd/atmel-nand.txt
new file mode 100644
index 0000000..a910ab9
--- /dev/null
+++ b/Documentation/devicetree/bindings/mtd/atmel-nand.txt
@@ -0,0 +1,41 @@ 
+Atmel NAND flash
+
+Required properties:
+- compatible : "atmel,at91rm9200-nand".
+- reg : should specify localbus address and size used for the chip,
+	and if availlable the ECC.
+- atmel,nand-addr-offset : offset for the address latch.
+- atmel,nand-cmd-offset : offset for the command latch.
+- #address-cells, #size-cells : Must be present if the device has sub-nodes
+  representing partitions.
+
+- gpios : specifies the gpio pins to control the NAND device. detect is an
+  optional gpio and may be set to 0 if not present.
+
+Optional properties:
+- nand-ecc-mode : String, operation mode of the NAND ecc mode, soft by default.
+  Supported values are: "none", "soft", "hw", "hw_syndrome", "hw_oob_first",
+  "soft_bch".
+- nand-bus-width : 8 or 16 bus width if not present 8
+- nand-on-flash-bbt: boolean to enable on flash bbt option if not present false
+
+Examples:
+nand0: nand@40000000,0 {
+	compatible = "atmel,at91rm9200-nand";
+	#address-cells = <1>;
+	#size-cells = <1>;
+	reg = <0x40000000 0x10000000
+	       0xffffe800 0x200
+	      >;
+	atmel,nand-addr-offset = <21>;
+	atmel,nand-cmd-offset = <22>;
+	nand-on-flash-bbt = <1>;
+	nand-ecc-mode = "soft";
+	gpios = <&pioC 13 0
+		 &pioC 14 0
+		 0
+		>;
+	partition@0 {
+		...
+	};
+};
diff --git a/arch/arm/boot/dts/at91sam9g20.dtsi b/arch/arm/boot/dts/at91sam9g20.dtsi
index 325989a..35abcd4 100644
--- a/arch/arm/boot/dts/at91sam9g20.dtsi
+++ b/arch/arm/boot/dts/at91sam9g20.dtsi
@@ -151,6 +151,23 @@ 
 				interrupts = <21 4>;
 				status = "disabled";
 			};
+
+			nand0: nand@40000000 {
+				compatible = "atmel,at91rm9200-nand";
+				#address-cells = <1>;
+				#size-cells = <1>;
+				reg = <0x40000000 0x10000000
+				       0xffffe800 0x200
+				      >;
+				atmel,nand-addr-offset = <21>;
+				atmel,nand-cmd-offset = <22>;
+				gpios = <&pioC 13 0
+					 &pioC 14 0
+					 0
+					>;
+				status = "disabled";
+			};
+
 		};
 	};
 };
diff --git a/arch/arm/boot/dts/at91sam9g45.dtsi b/arch/arm/boot/dts/at91sam9g45.dtsi
index a9dbbb5..6a72424 100644
--- a/arch/arm/boot/dts/at91sam9g45.dtsi
+++ b/arch/arm/boot/dts/at91sam9g45.dtsi
@@ -158,6 +158,23 @@ 
 				interrupts = <25 4>;
 				status = "disabled";
 			};
+
+			nand0: nand@40000000 {
+				compatible = "atmel,at91rm9200-nand";
+				#address-cells = <1>;
+				#size-cells = <1>;
+				reg = <0x40000000 0x10000000
+				       0xffffe200 0x200
+				      >;
+				atmel,nand-addr-offset = <21>;
+				atmel,nand-cmd-offset = <22>;
+				gpios = <&pioC 8 0
+					 &pioC 14 0
+					 0
+					>;
+				status = "disabled";
+			};
+
 		};
 	};
 };
diff --git a/arch/arm/boot/dts/at91sam9m10g45ek.dts b/arch/arm/boot/dts/at91sam9m10g45ek.dts
index a387e77..03a15c0 100644
--- a/arch/arm/boot/dts/at91sam9m10g45ek.dts
+++ b/arch/arm/boot/dts/at91sam9m10g45ek.dts
@@ -14,7 +14,7 @@ 
 	compatible = "atmel,at91sam9m10g45ek", "atmel,at91sam9g45", "atmel,at91sam9";
 
 	chosen {
-		bootargs = "mem=64M console=ttyS0,115200 mtdparts=atmel_nand:4M(bootstrap/uboot/kernel)ro,60M(rootfs),-(data) root=/dev/mtdblock1 rw rootfstype=jffs2";
+		bootargs = "mem=64M console=ttyS0,115200 root=/dev/mtdblock1 rw rootfstype=jffs2";
 	};
 
 	memory@70000000 {
@@ -35,6 +35,30 @@ 
 				phy-mode = "rmii";
 				status = "okay";
 			};
+
+			nand0: nand@40000000 {
+				nand-bus-width = <8>;
+				nand-ecc-mode = "soft";
+				nand-on-flash-bbt = <1>;
+				status = "okay";
+
+				boot@0 {
+					label = "bootstrap/uboot/kernel";
+					reg = <0x0 0x400000>;
+				};
+
+				rootfs@400000 {
+					label = "rootfs";
+					reg = <0x400000 0x3C00000>;
+				};
+
+				data@4000000 {
+					label = "data";
+					reg = <0x4000000 0xC000000>;
+				};
+
+			};
+
 		};
 	};
 };
diff --git a/arch/arm/boot/dts/usb_a9g20.dts b/arch/arm/boot/dts/usb_a9g20.dts
index f04b535..feafede 100644
--- a/arch/arm/boot/dts/usb_a9g20.dts
+++ b/arch/arm/boot/dts/usb_a9g20.dts
@@ -13,7 +13,7 @@ 
 	compatible = "calao,usb-a9g20", "atmel,at91sam9g20", "atmel,at91sam9";
 
 	chosen {
-		bootargs = "mem=64M console=ttyS0,115200 mtdparts=atmel_nand:128k(at91bootstrap),256k(barebox)ro,128k(bareboxenv),128k(bareboxenv2),4M(kernel),120M(rootfs),-(data) root=/dev/mtdblock5 rw rootfstype=ubifs";
+		bootargs = "mem=64M console=ttyS0,115200 root=/dev/mtdblock5 rw rootfstype=ubifs";
 	};
 
 	memory@20000000 {
@@ -30,6 +30,50 @@ 
 				phy-mode = "rmii";
 				status = "okay";
 			};
+
+			nand0: nand@40000000 {
+				nand-bus-width = <8>;
+				nand-ecc-mode = "soft";
+				nand-on-flash-bbt = <1>;
+				status = "okay";
+
+				at91bootstrap@0 {
+					label = "at91bootstrap";
+					reg = <0x0 0x20000>;
+				};
+
+				barebox@20000 {
+					label = "barebox";
+					reg = <0x20000 0x40000>;
+				};
+
+				bareboxenv@60000 {
+					label = "bareboxenv";
+					reg = <0x60000 0x20000>;
+				};
+
+				bareboxenv2@80000 {
+					label = "bareboxenv2";
+					reg = <0x80000 0x20000>;
+				};
+
+				kernel@a0000 {
+					label = "kernel";
+					reg = <0xa0000 0x400000>;
+				};
+
+				rootfs@4a0000 {
+					label = "rootfs";
+					reg = <0x4a0000 0x7800000>;
+				};
+
+				data@7ca0000 {
+					label = "data";
+					reg = <0x7ca0000 0x8360000>;
+				};
+
+			};
+
 		};
 	};
 };
diff --git a/arch/arm/mach-at91/at91sam9x5.c b/arch/arm/mach-at91/at91sam9x5.c
index d17d426..19f28a5 100644
--- a/arch/arm/mach-at91/at91sam9x5.c
+++ b/arch/arm/mach-at91/at91sam9x5.c
@@ -316,11 +316,6 @@  void __init at91sam9x5_initialize(void)
 }
 
 /* --------------------------------------------------------------------
- *  AT91SAM9x5 devices (temporary before modification of code)
- * -------------------------------------------------------------------- */
-void __init at91_add_device_nand(struct atmel_nand_data *data) {}
-
-/* --------------------------------------------------------------------
  *  Interrupt initialization
  * -------------------------------------------------------------------- */
 /*
diff --git a/arch/arm/mach-at91/board-dt.c b/arch/arm/mach-at91/board-dt.c
index 285d9a4..ca25689 100644
--- a/arch/arm/mach-at91/board-dt.c
+++ b/arch/arm/mach-at91/board-dt.c
@@ -17,10 +17,7 @@ 
 #include <linux/gpio.h>
 #include <linux/of_platform.h>
 
-#include <mach/hardware.h>
 #include <mach/board.h>
-#include <mach/system_rev.h>
-#include <mach/at91sam9_smc.h>
 
 #include <asm/setup.h>
 #include <asm/irq.h>
@@ -28,54 +25,8 @@ 
 #include <asm/mach/map.h>
 #include <asm/mach/irq.h>
 
-#include "sam9_smc.h"
 #include "generic.h"
 
-
-/* det_pin is not connected */
-static struct atmel_nand_data __initdata ek_nand_data = {
-	.ale		= 21,
-	.cle		= 22,
-	.det_pin	= -EINVAL,
-	.rdy_pin	= AT91_PIN_PC8,
-	.enable_pin	= AT91_PIN_PC14,
-	.ecc_mode	= NAND_ECC_SOFT,
-	.on_flash_bbt	= 1,
-};
-
-static struct sam9_smc_config __initdata ek_nand_smc_config = {
-	.ncs_read_setup		= 0,
-	.nrd_setup		= 2,
-	.ncs_write_setup	= 0,
-	.nwe_setup		= 2,
-
-	.ncs_read_pulse		= 4,
-	.nrd_pulse		= 4,
-	.ncs_write_pulse	= 4,
-	.nwe_pulse		= 4,
-
-	.read_cycle		= 7,
-	.write_cycle		= 7,
-
-	.mode			= AT91_SMC_READMODE | AT91_SMC_WRITEMODE | AT91_SMC_EXNWMODE_DISABLE,
-	.tdf_cycles		= 3,
-};
-
-static void __init ek_add_device_nand(void)
-{
-	ek_nand_data.bus_width_16 = board_have_nand_16bit();
-	/* setup bus-width (8 or 16) */
-	if (ek_nand_data.bus_width_16)
-		ek_nand_smc_config.mode |= AT91_SMC_DBW_16;
-	else
-		ek_nand_smc_config.mode |= AT91_SMC_DBW_8;
-
-	/* configure chip-select 3 (NAND) */
-	sam9_smc_configure(0, 3, &ek_nand_smc_config);
-
-	at91_add_device_nand(&ek_nand_data);
-}
-
 static void __init at91_dt_init_irq(void)
 {
 	/* Initialize processor: 12.000 MHz crystal */
@@ -87,9 +38,6 @@  static void __init at91_dt_init_irq(void)
 static void __init at91_dt_device_init(void)
 {
 	of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
-
-	/* NAND */
-	ek_add_device_nand();
 }
 
 static const char *at91_dt_board_compat[] __initdata = {
diff --git a/drivers/mtd/nand/atmel_nand.c b/drivers/mtd/nand/atmel_nand.c
index 045d174..ae7e37d 100644
--- a/drivers/mtd/nand/atmel_nand.c
+++ b/drivers/mtd/nand/atmel_nand.c
@@ -27,6 +27,10 @@ 
 #include <linux/module.h>
 #include <linux/moduleparam.h>
 #include <linux/platform_device.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/of_gpio.h>
+#include <linux/of_mtd.h>
 #include <linux/mtd/mtd.h>
 #include <linux/mtd/nand.h>
 #include <linux/mtd/partitions.h>
@@ -83,7 +87,7 @@  struct atmel_nand_host {
 	struct mtd_info		mtd;
 	void __iomem		*io_base;
 	dma_addr_t		io_phys;
-	struct atmel_nand_data	*board;
+	struct atmel_nand_data	board;
 	struct device		*dev;
 	void __iomem		*ecc;
 
@@ -101,8 +105,8 @@  static int cpu_has_dma(void)
  */
 static void atmel_nand_enable(struct atmel_nand_host *host)
 {
-	if (gpio_is_valid(host->board->enable_pin))
-		gpio_set_value(host->board->enable_pin, 0);
+	if (gpio_is_valid(host->board.enable_pin))
+		gpio_set_value(host->board.enable_pin, 0);
 }
 
 /*
@@ -110,8 +114,8 @@  static void atmel_nand_enable(struct atmel_nand_host *host)
  */
 static void atmel_nand_disable(struct atmel_nand_host *host)
 {
-	if (gpio_is_valid(host->board->enable_pin))
-		gpio_set_value(host->board->enable_pin, 1);
+	if (gpio_is_valid(host->board.enable_pin))
+		gpio_set_value(host->board.enable_pin, 1);
 }
 
 /*
@@ -132,9 +136,9 @@  static void atmel_nand_cmd_ctrl(struct mtd_info *mtd, int cmd, unsigned int ctrl
 		return;
 
 	if (ctrl & NAND_CLE)
-		writeb(cmd, host->io_base + (1 << host->board->cle));
+		writeb(cmd, host->io_base + (1 << host->board.cle));
 	else
-		writeb(cmd, host->io_base + (1 << host->board->ale));
+		writeb(cmd, host->io_base + (1 << host->board.ale));
 }
 
 /*
@@ -145,8 +149,8 @@  static int atmel_nand_device_ready(struct mtd_info *mtd)
 	struct nand_chip *nand_chip = mtd->priv;
 	struct atmel_nand_host *host = nand_chip->priv;
 
-	return gpio_get_value(host->board->rdy_pin) ^
-                !!host->board->rdy_pin_active_low;
+	return gpio_get_value(host->board.rdy_pin) ^
+                !!host->board.rdy_pin_active_low;
 }
 
 /*
@@ -261,7 +265,7 @@  static void atmel_read_buf(struct mtd_info *mtd, u8 *buf, int len)
 		if (atmel_nand_dma_op(mtd, buf, len, 1) == 0)
 			return;
 
-	if (host->board->bus_width_16)
+	if (host->board.bus_width_16)
 		atmel_read_buf16(mtd, buf, len);
 	else
 		atmel_read_buf8(mtd, buf, len);
@@ -277,7 +281,7 @@  static void atmel_write_buf(struct mtd_info *mtd, const u8 *buf, int len)
 		if (atmel_nand_dma_op(mtd, (void *)buf, len, 0) == 0)
 			return;
 
-	if (host->board->bus_width_16)
+	if (host->board.bus_width_16)
 		atmel_write_buf16(mtd, buf, len);
 	else
 		atmel_write_buf8(mtd, buf, len);
@@ -469,6 +473,56 @@  static void atmel_nand_hwctl(struct mtd_info *mtd, int mode)
 	}
 }
 
+#if defined(CONFIG_OF)
+static int __devinit atmel_of_init_port(struct atmel_nand_host *host,
+					 struct device_node *np)
+{
+	u32 val;
+	int ecc_mode;
+	struct atmel_nand_data *board = &host->board;
+	enum of_gpio_flags flags;
+
+	if (of_property_read_u32(np, "atmel,nand-addr-offset", &val) == 0) {
+		if (val >= 32) {
+			dev_err(host->dev, "invalid addr-offset %u\n", val);
+			return -EINVAL;
+		}
+		board->ale = val;
+	}
+
+	if (of_property_read_u32(np, "atmel,nand-cmd-offset", &val) == 0) {
+		if (val >= 32) {
+			dev_err(host->dev, "invalid cmd-offset %u\n", val);
+			return -EINVAL;
+		}
+		board->cle = val;
+	}
+
+	ecc_mode = of_get_nand_ecc_mode(np);
+
+	board->ecc_mode = ecc_mode < 0 ? NAND_ECC_SOFT : ecc_mode;
+
+	board->on_flash_bbt = of_get_nand_on_flash_bbt(np);
+
+	if (of_get_nand_bus_width(np) == 16)
+		board->bus_width_16 = 1;
+
+	board->rdy_pin = of_get_gpio_flags(np, 0, &flags);
+	board->rdy_pin_active_low = (flags == OF_GPIO_ACTIVE_LOW);
+
+	board->enable_pin = of_get_gpio(np, 1);
+	board->det_pin = of_get_gpio(np, 2);
+
+	return 0;
+}
+#else
+static int __devinit atmel_of_init_port(struct atmel_nand_host *host,
+					 struct device_node *np)
+{
+	return -EINVAL;
+}
+#endif
+
 /*
  * Probe for the NAND device.
  */
@@ -479,6 +533,7 @@  static int __init atmel_nand_probe(struct platform_device *pdev)
 	struct nand_chip *nand_chip;
 	struct resource *regs;
 	struct resource *mem;
+	struct mtd_part_parser_data ppdata = {};
 	int res;
 
 	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
@@ -505,8 +560,15 @@  static int __init atmel_nand_probe(struct platform_device *pdev)
 
 	mtd = &host->mtd;
 	nand_chip = &host->nand_chip;
-	host->board = pdev->dev.platform_data;
 	host->dev = &pdev->dev;
+	if (pdev->dev.of_node) {
+		res = atmel_of_init_port(host, pdev->dev.of_node);
+		if (res)
+			goto err_nand_ioremap;
+	} else {
+		memcpy(&host->board, pdev->dev.platform_data,
+		       sizeof(struct atmel_nand_data));
+	}
 
 	nand_chip->priv = host;		/* link the private data structures */
 	mtd->priv = nand_chip;
@@ -517,10 +579,10 @@  static int __init atmel_nand_probe(struct platform_device *pdev)
 	nand_chip->IO_ADDR_W = host->io_base;
 	nand_chip->cmd_ctrl = atmel_nand_cmd_ctrl;
 
-	if (gpio_is_valid(host->board->rdy_pin))
+	if (gpio_is_valid(host->board.rdy_pin))
 		nand_chip->dev_ready = atmel_nand_device_ready;
 
-	nand_chip->ecc.mode = host->board->ecc_mode;
+	nand_chip->ecc.mode = host->board.ecc_mode;
 
 	regs = platform_get_resource(pdev, IORESOURCE_MEM, 1);
 	if (!regs && nand_chip->ecc.mode == NAND_ECC_HW) {
@@ -545,7 +607,7 @@  static int __init atmel_nand_probe(struct platform_device *pdev)
 
 	nand_chip->chip_delay = 20;		/* 20us command delay time */
 
-	if (host->board->bus_width_16)	/* 16-bit bus width */
+	if (host->board.bus_width_16)	/* 16-bit bus width */
 		nand_chip->options |= NAND_BUSWIDTH_16;
 
 	nand_chip->read_buf = atmel_read_buf;
@@ -554,15 +616,15 @@  static int __init atmel_nand_probe(struct platform_device *pdev)
 	platform_set_drvdata(pdev, host);
 	atmel_nand_enable(host);
 
-	if (gpio_is_valid(host->board->det_pin)) {
-		if (gpio_get_value(host->board->det_pin)) {
+	if (gpio_is_valid(host->board.det_pin)) {
+		if (gpio_get_value(host->board.det_pin)) {
 			printk(KERN_INFO "No SmartMedia card inserted.\n");
 			res = -ENXIO;
 			goto err_no_card;
 		}
 	}
 
-	if (host->board->on_flash_bbt || on_flash_bbt) {
+	if (host->board.on_flash_bbt || on_flash_bbt) {
 		printk(KERN_INFO "atmel_nand: Use On Flash BBT\n");
 		nand_chip->bbt_options |= NAND_BBT_USE_FLASH;
 	}
@@ -637,8 +699,9 @@  static int __init atmel_nand_probe(struct platform_device *pdev)
 	}
 
 	mtd->name = "atmel_nand";
-	res = mtd_device_parse_register(mtd, NULL, 0,
-			host->board->parts, host->board->num_parts);
+	ppdata.of_node = pdev->dev.of_node;
+	res = mtd_device_parse_register(mtd, NULL, &ppdata,
+			host->board.parts, host->board.num_parts);
 	if (!res)
 		return res;
 
@@ -682,11 +745,21 @@  static int __exit atmel_nand_remove(struct platform_device *pdev)
 	return 0;
 }
 
+#if defined(CONFIG_OF)
+static const struct of_device_id atmel_nand_dt_ids[] = {
+	{ .compatible = "atmel,at91rm9200-nand" },
+	{ /* sentinel */ }
+};
+
+MODULE_DEVICE_TABLE(of, atmel_nand_dt_ids);
+#endif
+
 static struct platform_driver atmel_nand_driver = {
 	.remove		= __exit_p(atmel_nand_remove),
 	.driver		= {
 		.name	= "atmel_nand",
 		.owner	= THIS_MODULE,
+		.of_match_table	= of_match_ptr(atmel_nand_dt_ids),
 	},
 };