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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: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Linus Walleij 2012-01-25 14:34:52 +01:00
parent 4a31bd28e8
commit 661d414cb4
1 changed files with 31 additions and 7 deletions
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38
arch/arm/mach-nomadik/i2c-8815nhk.c
View File

@ -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;
}