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Commit 5d4292a5 authored by Vaibhav Hiremath's avatar Vaibhav Hiremath Committed by Tony Lindgren
Browse files

AM3517: Enable I2C-GPIO Expander driver support for AM3517EVM 



Add platform hook-up interface to support I2C based GPIo expander
(TCA6416).

There are 3 instances of I2C Expander on AM3517EVM,
	- One is over I2C-2 mounted on Base board
	- Two are over I2C3 mounted on UI Card

Signed-off-by: default avatarVaibhav Hiremath <hvaibhav@ti.com>
Signed-off-by: default avatarTony Lindgren <tony@atomide.com>
parent f2afbbb8

arch/arm/mach-omap2/board-am3517evm.c

+38 −2
Original line number Original line Diff line number Diff line
@@ -20,6 +20,7 @@ 
#include <linux/init.h>

#include <linux/init.h>

#include <linux/platform_device.h>

#include <linux/platform_device.h>

#include <linux/gpio.h>

#include <linux/gpio.h>

#include <linux/i2c/pca953x.h>





#include <mach/hardware.h>

#include <mach/hardware.h>

#include <mach/am35xx.h>

#include <mach/am35xx.h>
@@ -71,11 +72,46 @@ static void __init am3517_evm_rtc_init(void) 
	am3517evm_i2c_boardinfo[0].irq = gpio_to_irq(GPIO_RTCS35390A_IRQ);

	am3517evm_i2c_boardinfo[0].irq = gpio_to_irq(GPIO_RTCS35390A_IRQ);

}

}





/*

 * I2C GPIO Expander - TCA6416

 */



/* Mounted on Base-Board */

static struct pca953x_platform_data am3517evm_gpio_expander_info_0 = {

	.gpio_base	= OMAP_MAX_GPIO_LINES,

};

static struct i2c_board_info __initdata am3517evm_tca6516_info_0[] = {

	{

		I2C_BOARD_INFO("tca6416", 0x21),

		.platform_data = &am3517evm_gpio_expander_info_0,

	},

};



/* Mounted on UI Card */

static struct pca953x_platform_data am3517evm_ui_gpio_expander_info_1 = {

	.gpio_base	= OMAP_MAX_GPIO_LINES + 16,

};

static struct pca953x_platform_data am3517evm_ui_gpio_expander_info_2 = {

	.gpio_base	= OMAP_MAX_GPIO_LINES + 32,

};

static struct i2c_board_info __initdata am3517evm_ui_tca6516_info[] = {

	{

		I2C_BOARD_INFO("tca6416", 0x20),

		.platform_data = &am3517evm_ui_gpio_expander_info_1,

	},

	{

		I2C_BOARD_INFO("tca6416", 0x21),

		.platform_data = &am3517evm_ui_gpio_expander_info_2,

	},

};



static int __init am3517_evm_i2c_init(void)

static int __init am3517_evm_i2c_init(void)

{

{

	omap_register_i2c_bus(1, 400, NULL, 0);

	omap_register_i2c_bus(1, 400, NULL, 0);

	omap_register_i2c_bus(2, 400, NULL, 0);

	omap_register_i2c_bus(2, 400, am3517evm_tca6516_info_0,

	omap_register_i2c_bus(3, 400, NULL, 0);

			ARRAY_SIZE(am3517evm_tca6516_info_0));

	omap_register_i2c_bus(3, 400, am3517evm_ui_tca6516_info,

			ARRAY_SIZE(am3517evm_ui_tca6516_info));





	return 0;

	return 0;

}

}