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Commit d48a41c1 authored by Srinidhi Kasagar's avatar Srinidhi Kasagar Committed by Russell King
Browse files

ARM: 5913/1: ARM U8500: add I2C platform configurations 



This adds platform configurations to support four
i2c controllers found on early MOP500 platform

This depends on the patch 5908/1 for build to succeed.

Signed-off-by: default avatarSrinidhi Kasagar <srinidhi.kasagar@stericsson.com>
Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent e208c447

arch/arm/mach-ux500/board-mop500.c

+75 −0
Original line number Diff line number Diff line
@@ -22,6 +22,7 @@ 
#include <asm/mach/arch.h>



#include <plat/mtu.h>

#include <plat/i2c.h>



#include <mach/hardware.h>

#include <mach/setup.h>
@@ -120,6 +121,70 @@ static struct amba_device pl031_device = { 
	.irq = {IRQ_RTC_RTT, NO_IRQ},

};



#define U8500_I2C_RESOURCES(id, size)		\

static struct resource u8500_i2c_resources_##id[] = {	\

	[0] = {					\

		.start	= U8500_I2C##id##_BASE,	\

		.end	= U8500_I2C##id##_BASE + size - 1, \

		.flags	= IORESOURCE_MEM,	\

	},					\

	[1] = {					\

		.start	= IRQ_I2C##id,		\

		.end	= IRQ_I2C##id,		\

		.flags	= IORESOURCE_IRQ	\

	}					\

}



U8500_I2C_RESOURCES(0, SZ_4K);

U8500_I2C_RESOURCES(1, SZ_4K);

U8500_I2C_RESOURCES(2, SZ_4K);

U8500_I2C_RESOURCES(3, SZ_4K);



#define U8500_I2C_CONTROLLER(id, _slsu, _tft, _rft, clk, _sm) \

static struct nmk_i2c_controller u8500_i2c_##id = { \

	/*				\

	 * slave data setup time, which is	\

	 * 250 ns,100ns,10ns which is 14,6,2	\

	 * respectively for a 48 Mhz	\

	 * i2c clock			\

	 */				\

	.slsu		= _slsu,	\

	/* Tx FIFO threshold */		\

	.tft		= _tft,		\

	/* Rx FIFO threshold */		\

	.rft		= _rft,		\

	/* std. mode operation */	\

	.clk_freq	= clk,		\

	.sm		= _sm,		\

}



/*

 * The board uses 4 i2c controllers, initialize all of

 * them with slave data setup time of 250 ns,

 * Tx & Rx FIFO threshold values as 1 and standard

 * mode of operation

 */

U8500_I2C_CONTROLLER(0, 0xe, 1, 1, 100000, I2C_FREQ_MODE_STANDARD);

U8500_I2C_CONTROLLER(1, 0xe, 1, 1, 100000, I2C_FREQ_MODE_STANDARD);

U8500_I2C_CONTROLLER(2,	0xe, 1, 1, 100000, I2C_FREQ_MODE_STANDARD);

U8500_I2C_CONTROLLER(3,	0xe, 1, 1, 100000, I2C_FREQ_MODE_STANDARD);



#define U8500_I2C_PDEVICE(cid)		\

static struct platform_device i2c_controller##cid = { \

	.name = "nmk-i2c",		\

	.id	 = cid,			\

	.num_resources = 2,		\

	.resource = u8500_i2c_resources_##cid,	\

	.dev = {			\

		.platform_data = &u8500_i2c_##cid \

	}				\

}



U8500_I2C_PDEVICE(0);

U8500_I2C_PDEVICE(1);

U8500_I2C_PDEVICE(2);

U8500_I2C_PDEVICE(3);



static struct amba_device *amba_devs[] __initdata = {

	&uart0_device,

	&uart1_device,
@@ -128,6 +193,14 @@ static struct amba_device *amba_devs[] __initdata = { 
	&pl031_device,

};



/* add any platform devices here - TODO */

static struct platform_device *platform_devs[] __initdata = {

	&i2c_controller0,

	&i2c_controller1,

	&i2c_controller2,

	&i2c_controller3,

};



static void __init u8500_timer_init(void)

{

#ifdef CONFIG_LOCAL_TIMERS
@@ -152,6 +225,8 @@ static void __init u8500_init_machine(void) 
	for (i = 0; i < ARRAY_SIZE(amba_devs); i++)

		amba_device_register(amba_devs[i], &iomem_resource);



	platform_add_devices(platform_devs, ARRAY_SIZE(platform_devs));



	spi_register_board_info(u8500_spi_devices,

			ARRAY_SIZE(u8500_spi_devices));