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Commit 63796b74 authored by Alessandro Rubini's avatar Alessandro Rubini Committed by Russell King
Browse files

[ARM] 5585/1: nomadik: add gpio-i2c devices 



Signed-off-by: default avatarAlessandro Rubini <rubini@unipv.it>
Acked-by: default avatarAndrea Gallo <andrea.gallo@stericsson.com>
Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent 2ec1d359

arch/arm/mach-nomadik/Kconfig

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@@ -11,4 +11,11 @@ endmenu 
config NOMADIK_8815

	bool





config I2C_BITBANG_8815NHK

	tristate "Driver for bit-bang busses found on the 8815 NHK"

	depends on I2C && MACH_NOMADIK_8815NHK

	select I2C_ALGOBIT

	default y



endif

arch/arm/mach-nomadik/Makefile

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@@ -14,3 +14,6 @@ obj-$(CONFIG_NOMADIK_8815) += cpu-8815.o 


# Specific board support

obj-$(CONFIG_MACH_NOMADIK_8815NHK) += board-nhk8815.o



# Nomadik extra devices

obj-$(CONFIG_I2C_BITBANG_8815NHK) += i2c-8815nhk.o

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

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#include <linux/module.h>

#include <linux/init.h>

#include <linux/i2c.h>

#include <linux/i2c-algo-bit.h>

#include <linux/i2c-gpio.h>

#include <linux/gpio.h>

#include <linux/platform_device.h>



/*

 * There are two busses in the 8815NHK.

 * They could, in theory, be driven by the hardware component, but we

 * use bit-bang through GPIO by now, to keep things simple

 */



static struct i2c_gpio_platform_data nhk8815_i2c_data0 = {

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

	.scl_pin = 62,

	.sda_pin = 63,

};



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 */

static struct platform_device nhk8815_i2c_dev0 = {

	.name	= "i2c-gpio",

	.id	= 0,

	.dev	= {

		.platform_data = &nhk8815_i2c_data0,

	},

};

/* second bus: GPIO XX and YY */

static struct platform_device nhk8815_i2c_dev1 = {

	.name	= "i2c-gpio",

	.id	= 1,

	.dev	= {

		.platform_data = &nhk8815_i2c_data1,

	},

};



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);

	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);



	return 0;

}



static void __exit nhk8815_i2c_exit(void)

{

	platform_device_unregister(&nhk8815_i2c_dev0);

	platform_device_unregister(&nhk8815_i2c_dev1);

	return;

}



module_init(nhk8815_i2c_init);

module_exit(nhk8815_i2c_exit);