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

	  Include support for IMX27 IPCAM platform. This includes specific

	  configurations for the board and its peripherals.

	  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

endif





if ARCH_IMX_V6_V7

if ARCH_IMX_V6_V7

arch/arm/mach-imx/Makefile

+1 −0
Original line number Original line 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_PCA100) += mach-pca100.o

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

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

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

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

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





# i.MX31 based machines

# i.MX31 based machines

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

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

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

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

#include <linux/io.h>

#include <linux/module.h>

#include <linux/module.h>

#include <linux/clkdev.h>

#include <linux/clkdev.h>

#include <linux/of.h>





#include <asm/div64.h>

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

	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