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Commit 9f0749e3 authored by Sascha Hauer's avatar Sascha Hauer
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ARM i.MX27: Add devicetree support 



This patch adds basic devicetree support for i.MX27 based SoCs.
Only the bindings for which drivers exist are added here:

- UART
- fec
- CSPI
- I2C
- watchdog
- gpio

Signed-off-by: default avatarSascha Hauer <s.hauer@pengutronix.de>
parent 6b21d18e

arch/arm/boot/dts/imx27.dtsi

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+217 −0
Original line number Diff line number Diff line 
/*

 * Copyright 2012 Sascha Hauer, Pengutronix

 *

 * The code contained herein is licensed under the GNU General Public

 * License. You may obtain a copy of the GNU General Public License

 * Version 2 or later at the following locations:

 *

 * http://www.opensource.org/licenses/gpl-license.html

 * http://www.gnu.org/copyleft/gpl.html

 */



/include/ "skeleton.dtsi"



/ {

	aliases {

		serial0 = &uart1;

		serial1 = &uart2;

		serial2 = &uart3;

		serial3 = &uart4;

		serial4 = &uart5;

		serial5 = &uart6;

	};



	avic: avic-interrupt-controller@e0000000 {

		compatible = "fsl,imx27-avic", "fsl,avic";

		interrupt-controller;

		#interrupt-cells = <1>;

		reg = <0x10040000 0x1000>;

	};



	clocks {

		#address-cells = <1>;

		#size-cells = <0>;



		osc26m {

			compatible = "fsl,imx-osc26m", "fixed-clock";

			clock-frequency = <26000000>;

		};

	};



	soc {

		#address-cells = <1>;

		#size-cells = <1>;

		compatible = "simple-bus";

		interrupt-parent = <&avic>;

		ranges;



		aipi@10000000 { /* AIPI1 */

			compatible = "fsl,aipi-bus", "simple-bus";

			#address-cells = <1>;

			#size-cells = <1>;

			reg = <0x10000000 0x10000000>;

			ranges;



			wdog@10002000 {

				compatible = "fsl,imx27-wdt", "fsl,imx21-wdt";

				reg = <0x10002000 0x4000>;

				interrupts = <27>;

				status = "disabled";

			};



			uart1: uart@1000a000 {

				compatible = "fsl,imx27-uart", "fsl,imx21-uart";

				reg = <0x1000a000 0x1000>;

				interrupts = <20>;

				status = "disabled";

			};



			uart2: uart@1000b000 {

				compatible = "fsl,imx27-uart", "fsl,imx21-uart";

				reg = <0x1000b000 0x1000>;

				interrupts = <19>;

				status = "disabled";

			};



			uart3: uart@1000c000 {

				compatible = "fsl,imx27-uart", "fsl,imx21-uart";

				reg = <0x1000c000 0x1000>;

				interrupts = <18>;

				status = "disabled";

			};



			uart4: uart@1000d000 {

				compatible = "fsl,imx27-uart", "fsl,imx21-uart";

				reg = <0x1000d000 0x1000>;

				interrupts = <17>;

				status = "disabled";

			};



			cspi1: cspi@1000e000 {

				#address-cells = <1>;

				#size-cells = <0>;

				compatible = "fsl,imx27-cspi";

				reg = <0x1000e000 0x1000>;

				interrupts = <16>;

				status = "disabled";

			};



			cspi2: cspi@1000f000 {

				#address-cells = <1>;

				#size-cells = <0>;

				compatible = "fsl,imx27-cspi";

				reg = <0x1000f000 0x1000>;

				interrupts = <15>;

				status = "disabled";

			};



			i2c1: i2c@10012000 {

				#address-cells = <1>;

				#size-cells = <0>;

				compatible = "fsl,imx27-i2c", "fsl,imx1-i2c";

				reg = <0x10012000 0x1000>;

				interrupts = <12>;

				status = "disabled";

			};



			gpio1: gpio@10015000 {

				compatible = "fsl,imx27-gpio", "fsl,imx21-gpio";

				reg = <0x10015000 0x100>;

				interrupts = <8>;

				gpio-controller;

				#gpio-cells = <2>;

				interrupt-controller;

				#interrupt-cells = <1>;

			};



			gpio2: gpio@10015100 {

				compatible = "fsl,imx27-gpio", "fsl,imx21-gpio";

				reg = <0x10015100 0x100>;

				interrupts = <8>;

				gpio-controller;

				#gpio-cells = <2>;

				interrupt-controller;

				#interrupt-cells = <1>;

			};



			gpio3: gpio@10015200 {

				compatible = "fsl,imx27-gpio", "fsl,imx21-gpio";

				reg = <0x10015200 0x100>;

				interrupts = <8>;

				gpio-controller;

				#gpio-cells = <2>;

				interrupt-controller;

				#interrupt-cells = <1>;

			};



			gpio4: gpio@10015300 {

				compatible = "fsl,imx27-gpio", "fsl,imx21-gpio";

				reg = <0x10015300 0x100>;

				interrupts = <8>;

				gpio-controller;

				#gpio-cells = <2>;

				interrupt-controller;

				#interrupt-cells = <1>;

			};



			gpio5: gpio@10015400 {

				compatible = "fsl,imx27-gpio", "fsl,imx21-gpio";

				reg = <0x10015400 0x100>;

				interrupts = <8>;

				gpio-controller;

				#gpio-cells = <2>;

				interrupt-controller;

				#interrupt-cells = <1>;

			};



			gpio6: gpio@10015500 {

				compatible = "fsl,imx27-gpio", "fsl,imx21-gpio";

				reg = <0x10015500 0x100>;

				interrupts = <8>;

				gpio-controller;

				#gpio-cells = <2>;

				interrupt-controller;

				#interrupt-cells = <1>;

			};



			cspi3: cspi@10017000 {

				#address-cells = <1>;

				#size-cells = <0>;

				compatible = "fsl,imx27-cspi";

				reg = <0x10017000 0x1000>;

				interrupts = <6>;

				status = "disabled";

			};



			uart5: uart@1001b000 {

				compatible = "fsl,imx27-uart", "fsl,imx21-uart";

				reg = <0x1001b000 0x1000>;

				interrupts = <49>;

				status = "disabled";

			};



			uart6: uart@1001c000 {

				compatible = "fsl,imx27-uart", "fsl,imx21-uart";

				reg = <0x1001c000 0x1000>;

				interrupts = <48>;

				status = "disabled";

			};



			i2c2: i2c@1001d000 {

				#address-cells = <1>;

				#size-cells = <0>;

				compatible = "fsl,imx27-i2c", "fsl,imx1-i2c";

				reg = <0x1001d000 0x1000>;

				interrupts = <1>;

				status = "disabled";

			};



			fec: fec@1002b000 {

				compatible = "fsl,imx27-fec";

				reg = <0x1002b000 0x4000>;

				interrupts = <50>;

				status = "disabled";

			};

		};

	};

};

arch/arm/mach-imx/Kconfig

+8 −0
Original line number Diff line number Diff line
@@ -376,6 +376,14 @@ config MACH_IMX27IPCAM 
	  Include support for IMX27 IPCAM platform. This includes specific

	  configurations for the board and its peripherals.



config MACH_IMX27_DT

	bool "Support i.MX27 platforms from device tree"

	select SOC_IMX27

	select USE_OF

	help

	  Include support for Freescale i.MX27 based platforms

	  using the device tree for discovery



endif



if ARCH_IMX_V6_V7

arch/arm/mach-imx/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -41,6 +41,7 @@ obj-$(CONFIG_MACH_EUKREA_MBIMX27_BASEBOARD) += eukrea_mbimx27-baseboard.o 
obj-$(CONFIG_MACH_PCA100) += mach-pca100.o

obj-$(CONFIG_MACH_MXT_TD60) += mach-mxt_td60.o

obj-$(CONFIG_MACH_IMX27IPCAM) += mach-imx27ipcam.o

obj-$(CONFIG_MACH_IMX27_DT) += imx27-dt.o



# i.MX31 based machines

obj-$(CONFIG_MACH_MX31ADS) += mach-mx31ads.o

arch/arm/mach-imx/clock-imx27.c

+18 −0
Original line number Diff line number Diff line
@@ -22,6 +22,7 @@ 
#include <linux/io.h>

#include <linux/module.h>

#include <linux/clkdev.h>

#include <linux/of.h>



#include <asm/div64.h>
@@ -764,3 +765,20 @@ int __init mx27_clocks_init(unsigned long fref) 
	return 0;

}



#ifdef CONFIG_OF

int __init mx27_clocks_init_dt(void)

{

	struct device_node *np;

	u32 fref = 26000000; /* default */



	for_each_compatible_node(np, NULL, "fixed-clock") {

		if (!of_device_is_compatible(np, "fsl,imx-osc26m"))

			continue;



		if (!of_property_read_u32(np, "clock-frequency", &fref))

			break;

	}



	return mx27_clocks_init(fref);

}

#endif

arch/arm/mach-imx/imx27-dt.c

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/*

 * Copyright 2012 Sascha Hauer, Pengutronix

 *

 * The code contained herein is licensed under the GNU General Public

 * License. You may obtain a copy of the GNU General Public License

 * Version 2 or later at the following locations:

 *

 * http://www.opensource.org/licenses/gpl-license.html

 * http://www.gnu.org/copyleft/gpl.html

 */



#include <linux/irq.h>

#include <linux/irqdomain.h>

#include <linux/of_irq.h>

#include <linux/of_platform.h>

#include <asm/mach/arch.h>

#include <asm/mach/time.h>

#include <mach/common.h>

#include <mach/mx27.h>



static const struct of_dev_auxdata imx27_auxdata_lookup[] __initconst = {

	OF_DEV_AUXDATA("fsl,imx27-uart", MX27_UART1_BASE_ADDR, "imx21-uart.0", NULL),

	OF_DEV_AUXDATA("fsl,imx27-uart", MX27_UART2_BASE_ADDR, "imx21-uart.1", NULL),

	OF_DEV_AUXDATA("fsl,imx27-uart", MX27_UART3_BASE_ADDR, "imx21-uart.2", NULL),

	OF_DEV_AUXDATA("fsl,imx27-fec", MX27_FEC_BASE_ADDR, "imx27-fec.0", NULL),

	OF_DEV_AUXDATA("fsl,imx27-i2c", MX27_I2C1_BASE_ADDR, "imx-i2c.0", NULL),

	OF_DEV_AUXDATA("fsl,imx27-i2c", MX27_I2C2_BASE_ADDR, "imx-i2c.1", NULL),

	OF_DEV_AUXDATA("fsl,imx27-cspi", MX27_CSPI1_BASE_ADDR, "imx27-cspi.0", NULL),

	OF_DEV_AUXDATA("fsl,imx27-cspi", MX27_CSPI2_BASE_ADDR, "imx27-cspi.1", NULL),

	OF_DEV_AUXDATA("fsl,imx27-cspi", MX27_CSPI3_BASE_ADDR, "imx27-cspi.2", NULL),

	OF_DEV_AUXDATA("fsl,imx27-wdt", MX27_WDOG_BASE_ADDR, "imx2-wdt.0", NULL),

	{ /* sentinel */ }

};



static int __init imx27_avic_add_irq_domain(struct device_node *np,

				struct device_node *interrupt_parent)

{

	irq_domain_add_simple(np, 0);

	return 0;

}



static int __init imx27_gpio_add_irq_domain(struct device_node *np,

				struct device_node *interrupt_parent)

{

	static int gpio_irq_base = MXC_GPIO_IRQ_START + ARCH_NR_GPIOS;



	irq_domain_add_simple(np, gpio_irq_base);



	return 0;

}



static const struct of_device_id imx27_irq_match[] __initconst = {

	{ .compatible = "fsl,imx27-avic", .data = imx27_avic_add_irq_domain, },

	{ .compatible = "fsl,imx27-gpio", .data = imx27_gpio_add_irq_domain, },

	{ /* sentinel */ }

};



static void __init imx27_dt_init(void)

{

	of_irq_init(imx27_irq_match);



	of_platform_populate(NULL, of_default_bus_match_table,

			     imx27_auxdata_lookup, NULL);

}



static void __init imx27_timer_init(void)

{

	mx27_clocks_init_dt();

}



static struct sys_timer imx27_timer = {

	.init = imx27_timer_init,

};



static const char *imx27_dt_board_compat[] __initdata = {

	"fsl,imx27",

	NULL

};



DT_MACHINE_START(IMX27_DT, "Freescale i.MX27 (Device Tree Support)")

	.map_io		= mx27_map_io,

	.init_early	= imx27_init_early,

	.init_irq	= mx27_init_irq,

	.handle_irq	= imx27_handle_irq,

	.timer		= &imx27_timer,

	.init_machine	= imx27_dt_init,

	.dt_compat	= imx27_dt_board_compat,

	.restart	= mxc_restart,

MACHINE_END