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Commit 661d414c authored by Linus Walleij's avatar Linus Walleij
Browse files

ARM: nomadik: register all three I2C busses 



The Nomadik has two dedicated I2C bus blocks for I2C0 and I2C1,
and a bitbanged GPIO connection on two pins for the USB portions
of the STw4811 chip. Register all three as bit-banged GPIO for
the moment.

Acked-by: default avatarArnd Bergmann <arnd@arndb.de>
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent 4a31bd28

arch/arm/mach-nomadik/i2c-8815nhk.c

+31 −7
Original line number Diff line number Diff line
@@ -5,6 +5,7 @@ 
#include <linux/i2c-gpio.h>

#include <linux/platform_device.h>

#include <plat/gpio-nomadik.h>

#include <plat/pincfg.h>



/*

 * There are two busses in the 8815NHK.
@@ -12,19 +13,27 @@ 
 * use bit-bang through GPIO by now, to keep things simple

 */



/* I2C0 connected to the STw4811 power management chip */

static struct i2c_gpio_platform_data nhk8815_i2c_data0 = {

	/* keep defaults for timeouts; pins are push-pull bidirectional */

	.scl_pin = 62,

	.sda_pin = 63,

};



/* I2C1 connected to various sensors */

static struct i2c_gpio_platform_data nhk8815_i2c_data1 = {

	/* keep defaults for timeouts; pins are push-pull bidirectional */

	.scl_pin = 53,

	.sda_pin = 54,

};



/* first bus: GPIO XX and YY */

/* I2C2 connected to the USB portions of the STw4811 only */

static struct i2c_gpio_platform_data nhk8815_i2c_data2 = {

	/* keep defaults for timeouts; pins are push-pull bidirectional */

	.scl_pin = 73,

	.sda_pin = 74,

};



static struct platform_device nhk8815_i2c_dev0 = {

	.name	= "i2c-gpio",

	.id	= 0,
@@ -32,7 +41,7 @@ static struct platform_device nhk8815_i2c_dev0 = { 
		.platform_data = &nhk8815_i2c_data0,

	},

};

/* second bus: GPIO XX and YY */



static struct platform_device nhk8815_i2c_dev1 = {

	.name	= "i2c-gpio",

	.id	= 1,
@@ -41,15 +50,29 @@ static struct platform_device nhk8815_i2c_dev1 = { 
	},

};



static struct platform_device nhk8815_i2c_dev2 = {

	.name	= "i2c-gpio",

	.id	= 2,

	.dev	= {

		.platform_data = &nhk8815_i2c_data2,

	},

};



static pin_cfg_t cpu8815_pins_i2c[] = {

	PIN_CFG_INPUT(62, GPIO, PULLUP),

	PIN_CFG_INPUT(63, GPIO, PULLUP),

	PIN_CFG_INPUT(53, GPIO, PULLUP),

	PIN_CFG_INPUT(54, GPIO, PULLUP),

	PIN_CFG_INPUT(73, GPIO, PULLUP),

	PIN_CFG_INPUT(74, GPIO, PULLUP),

};



static int __init nhk8815_i2c_init(void)

{

	nmk_gpio_set_mode(nhk8815_i2c_data0.scl_pin, NMK_GPIO_ALT_GPIO);

	nmk_gpio_set_mode(nhk8815_i2c_data0.sda_pin, NMK_GPIO_ALT_GPIO);

	nmk_config_pins(cpu8815_pins_i2c, ARRAY_SIZE(cpu8815_pins_i2c));

	platform_device_register(&nhk8815_i2c_dev0);



	nmk_gpio_set_mode(nhk8815_i2c_data1.scl_pin, NMK_GPIO_ALT_GPIO);

	nmk_gpio_set_mode(nhk8815_i2c_data1.sda_pin, NMK_GPIO_ALT_GPIO);

	platform_device_register(&nhk8815_i2c_dev1);

	platform_device_register(&nhk8815_i2c_dev2);



	return 0;

}
@@ -58,6 +81,7 @@ static void __exit nhk8815_i2c_exit(void) 
{

	platform_device_unregister(&nhk8815_i2c_dev0);

	platform_device_unregister(&nhk8815_i2c_dev1);

	platform_device_unregister(&nhk8815_i2c_dev2);

	return;

}