[1/2] ARM i.MX35: Add devicetree support.

From: Steffen Trumtrar <s.trumtrar@pengutronix.de>

Cc: Shawn Guo <shawn.guo@linaro.org>
Cc: linux-arm-kernel@lists.infradead.org
Cc: Eric Bénard <eric@eukrea.com>
Signed-off-by: Steffen Trumtrar <s.trumtrar@pengutronix.de>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Denis Carikli <denis@eukrea.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 .../devicetree/bindings/clock/imx35-clock.txt      | 113 +++++++++++++++++++++
 arch/arm/mach-imx/Kconfig                          |   8 ++
 arch/arm/mach-imx/Makefile                         |   1 +
 arch/arm/mach-imx/clk-imx35.c                      |  14 +++
 arch/arm/mach-imx/imx35-dt.c                       |  57 +++++++++++
 5 files changed, 193 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/clock/imx35-clock.txt
 create mode 100644 arch/arm/mach-imx/imx35-dt.c

On Wed, Dec 18, 2013 at 03:10:25PM +0100, Sascha Hauer wrote:
> From: Steffen Trumtrar <s.trumtrar@pengutronix.de>
> 
> Cc: Shawn Guo <shawn.guo@linaro.org>
> Cc: linux-arm-kernel@lists.infradead.org
> Cc: Eric Bénard <eric@eukrea.com>
> Signed-off-by: Steffen Trumtrar <s.trumtrar@pengutronix.de>
> Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
> Signed-off-by: Denis Carikli <denis@eukrea.com>
> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
> ---
>  .../devicetree/bindings/clock/imx35-clock.txt      | 113 +++++++++++++++++++++

+ devicetree list

This should be simple, but let's still copy devicetree list to avoid the
possible nag from arm-soc folks when we send this to them.

>  arch/arm/mach-imx/Kconfig                          |   8 ++
>  arch/arm/mach-imx/Makefile                         |   1 +
>  arch/arm/mach-imx/clk-imx35.c                      |  14 +++
>  arch/arm/mach-imx/imx35-dt.c                       |  57 +++++++++++
>  5 files changed, 193 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/clock/imx35-clock.txt
>  create mode 100644 arch/arm/mach-imx/imx35-dt.c
> 
> diff --git a/Documentation/devicetree/bindings/clock/imx35-clock.txt b/Documentation/devicetree/bindings/clock/imx35-clock.txt
> new file mode 100644
> index 0000000..a703564
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/clock/imx35-clock.txt
> @@ -0,0 +1,113 @@
> +* Clock bindings for Freescale i.MX35
> +
> +Required properties:
> +- compatible: Should be "fsl,imx35-ccm"
> +- reg: Address and length of the register set
> +- interrupts: Should contain CCM interrupt
> +- #clock-cells: Should be <1>
> +
> +The clock consumer should specify the desired clock by having the clock
> +ID in its "clocks" phandle cell.  The following is a full list of i.MX35
> +clocks and IDs.
> +
> +	Clock			ID
> +	---------------------------
> +	ckih			0
> +	mpll			1
> +	ppll			2
> +	mpll_075		3
> +	arm			4
> +	hsp			5
> +	hsp_div			6
> +	hsp_sel			7
> +	ahb			8
> +	ipg			9
> +	arm_per_div		10
> +	ahb_per_div		11
> +	ipg_per			12
> +	uart_sel		13
> +	uart_div		14
> +	esdhc_sel		15
> +	esdhc1_div		16
> +	esdhc2_div		17
> +	esdhc3_div		18
> +	spdif_sel		19
> +	spdif_div_pre		20
> +	spdif_div_post		21
> +	ssi_sel			22
> +	ssi1_div_pre		23
> +	ssi1_div_post		24
> +	ssi2_div_pre		25
> +	ssi2_div_post		26
> +	usb_sel			27
> +	usb_div			28
> +	nfc_div			29
> +	asrc_gate		30
> +	pata_gate		31
> +	audmux_gate		32
> +	can1_gate		33
> +	can2_gate		34
> +	cspi1_gate		35
> +	cspi2_gate		36
> +	ect_gate		37
> +	edio_gate		38
> +	emi_gate		39
> +	epit1_gate		40
> +	epit2_gate		41
> +	esai_gate		42
> +	esdhc1_gate		43
> +	esdhc2_gate		44
> +	esdhc3_gate		45
> +	fec_gate		46
> +	gpio1_gate		47
> +	gpio2_gate		48
> +	gpio3_gate		49
> +	gpt_gate		50
> +	i2c1_gate		51
> +	i2c2_gate		52
> +	i2c3_gate		53
> +	iomuxc_gate		54
> +	ipu_gate		55
> +	kpp_gate		56
> +	mlb_gate		57
> +	mshc_gate		58
> +	owire_gate		59
> +	pwm_gate		60
> +	rngc_gate		61
> +	rtc_gate		62
> +	rtic_gate		63
> +	scc_gate		64
> +	sdma_gate		65
> +	spba_gate		66
> +	spdif_gate		67
> +	ssi1_gate		68
> +	ssi2_gate		69
> +	uart1_gate		70
> +	uart2_gate		71
> +	uart3_gate		72
> +	usbotg_gate		73
> +	wdog_gate		74
> +	max_gate		75
> +	admux_gate		76
> +	csi_gate		77
> +	csi_div			78
> +	csi_sel			79
> +	iim_gate		80
> +	gpu2d_gate		81
> +
> +Examples:
> +
> +clks: ccm@53f80000 {
> +	compatible = "fsl,imx35-ccm";
> +	reg = <0x53f80000 0x4000>;
> +	interrupts = <31>;
> +	#clock-cells = <1>;
> +};
> +
> +esdhc1: esdhc@53fb4000 {
> +	compatible = "fsl,imx35-esdhc";
> +	reg = <0x53fb4000 0x4000>;
> +	interrupts = <7>;
> +	clocks = <&clks 9>, <&clks 8>, <&clks 43>;
> +	clock-names = "ipg", "ahb", "per";
> +};
> diff --git a/arch/arm/mach-imx/Kconfig b/arch/arm/mach-imx/Kconfig
> index 29a8af6..44233c9 100644
> --- a/arch/arm/mach-imx/Kconfig
> +++ b/arch/arm/mach-imx/Kconfig
> @@ -138,6 +138,7 @@ config SOC_IMX35
>  	select HAVE_EPIT
>  	select MXC_AVIC
>  	select SMP_ON_UP if SMP
> +	select PINCTRL
>  
>  config SOC_IMX5
>  	bool
> @@ -625,6 +626,13 @@ config MACH_IMX31_DT
>  
>  comment "MX35 platforms:"
>  
> +config MACH_IMX35_DT
> +	bool "Support i.MX35 platforms from device tree"
> +	select SOC_IMX35
> +	help
> +	  Include support for Freescale i.MX35 based platforms
> +	  using the device tree for discovery.
> +
>  config MACH_PCM043
>  	bool "Support Phytec pcm043 (i.MX35) platforms"
>  	select IMX_HAVE_PLATFORM_FLEXCAN
> diff --git a/arch/arm/mach-imx/Makefile b/arch/arm/mach-imx/Makefile
> index 5383c58..f20a117 100644
> --- a/arch/arm/mach-imx/Makefile
> +++ b/arch/arm/mach-imx/Makefile
> @@ -89,6 +89,7 @@ obj-$(CONFIG_MACH_MX35_3DS) += mach-mx35_3ds.o
>  obj-$(CONFIG_MACH_EUKREA_CPUIMX35SD) += mach-cpuimx35.o
>  obj-$(CONFIG_MACH_EUKREA_MBIMXSD35_BASEBOARD) += eukrea_mbimxsd35-baseboard.o
>  obj-$(CONFIG_MACH_VPR200) += mach-vpr200.o
> +obj-$(CONFIG_MACH_IMX35_DT) += imx35-dt.o
>  
>  obj-$(CONFIG_HAVE_IMX_ANATOP) += anatop.o
>  obj-$(CONFIG_HAVE_IMX_GPC) += gpc.o
> diff --git a/arch/arm/mach-imx/clk-imx35.c b/arch/arm/mach-imx/clk-imx35.c
> index 2193c83..a4d5e42 100644
> --- a/arch/arm/mach-imx/clk-imx35.c
> +++ b/arch/arm/mach-imx/clk-imx35.c
> @@ -45,6 +45,8 @@ static struct arm_ahb_div clk_consumer[] = {
>  static char hsp_div_532[] = { 4, 8, 3, 0 };
>  static char hsp_div_400[] = { 3, 6, 3, 0 };
>  
> +static struct clk_onecell_data clk_data;
> +
>  static const char *std_sel[] = {"ppll", "arm"};
>  static const char *ipg_per_sel[] = {"ahb_per_div", "arm_per_div"};
>  
> @@ -286,3 +288,15 @@ int __init mx35_clocks_init(void)
>  
>  	return 0;
>  }
> +
> +static int __init mx35_clocks_init_dt(struct device_node *ccm_node)
> +{
> +	clk_data.clks = clk;
> +	clk_data.clk_num = ARRAY_SIZE(clk);
> +	of_clk_add_provider(ccm_node, of_clk_src_onecell_get, &clk_data);
> +
> +	mx35_clocks_init();
> +
> +	return 0;
> +}
> +CLK_OF_DECLARE(imx35, "fsl,imx35-ccm", mx35_clocks_init_dt);
> diff --git a/arch/arm/mach-imx/imx35-dt.c b/arch/arm/mach-imx/imx35-dt.c
> new file mode 100644
> index 0000000..8073d3f
> --- /dev/null
> +++ b/arch/arm/mach-imx/imx35-dt.c
> @@ -0,0 +1,57 @@
> +/*
> + * Copyright 2012 Steffen Trumtrar, Pengutronix
> + *
> + * based on imx27-dt.c
> + *
> + * This program is free software; you can redistribute it and/or modify it under
> + * the terms of the GNU General Public License version 2 as published by the
> + * Free Software Foundation.
> + */
> +
> +#include <linux/irq.h>
> +#include <linux/irqdomain.h>
> +#include <linux/of_irq.h>
> +#include <linux/of_platform.h>
> +#include <linux/clk-provider.h>
> +#include <linux/clocksource.h>
> +#include <asm/mach/arch.h>
> +#include <asm/mach/time.h>
> +#include <asm/hardware/cache-l2x0.h>
> +#include "common.h"
> +#include "mx35.h"
> +
> +static void __init imx35_dt_init(void)
> +{
> +	mxc_arch_reset_init_dt();
> +
> +	of_platform_populate(NULL, of_default_bus_match_table,
> +			     NULL, NULL);
> +}
> +
> +static void __init imx35_irq_init(void)
> +{
> +	imx_init_l2cache();
> +	mx35_init_irq();
> +}
> +
> +static void __init imx35_timer_init(void)
> +{
> +	of_clk_init(NULL);
> +	clocksource_of_init();
> +}

Now we can save this hook completely because of commit 4178bac (ARM:
call of_clk_init from default time_init handler).

Shawn

> +
> +static const char *imx35_dt_board_compat[] __initdata = {
> +	"fsl,imx35",
> +	NULL
> +};
> +
> +DT_MACHINE_START(IMX35_DT, "Freescale i.MX35 (Device Tree Support)")
> +	.map_io		= mx35_map_io,
> +	.init_early	= imx35_init_early,
> +	.init_irq	= imx35_irq_init,
> +	.init_time	= imx35_timer_init,
> +	.handle_irq	= imx35_handle_irq,
> +	.init_machine	= imx35_dt_init,
> +	.dt_compat	= imx35_dt_board_compat,
> +	.restart	= mxc_restart,
> +MACHINE_END
> -- 
> 1.8.5.1
>