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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>
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@ -5,6 +5,7 @@
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#include <linux/i2c-gpio.h>
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#include <linux/platform_device.h>
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#include <plat/gpio-nomadik.h>
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#include <plat/pincfg.h>
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/*
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* There are two busses in the 8815NHK.
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@ -12,19 +13,27 @@
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* use bit-bang through GPIO by now, to keep things simple
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*/
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/* I2C0 connected to the STw4811 power management chip */
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static struct i2c_gpio_platform_data nhk8815_i2c_data0 = {
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/* keep defaults for timeouts; pins are push-pull bidirectional */
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.scl_pin = 62,
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.sda_pin = 63,
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};
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/* I2C1 connected to various sensors */
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static struct i2c_gpio_platform_data nhk8815_i2c_data1 = {
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/* keep defaults for timeouts; pins are push-pull bidirectional */
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.scl_pin = 53,
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.sda_pin = 54,
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};
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/* first bus: GPIO XX and YY */
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/* I2C2 connected to the USB portions of the STw4811 only */
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static struct i2c_gpio_platform_data nhk8815_i2c_data2 = {
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/* keep defaults for timeouts; pins are push-pull bidirectional */
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.scl_pin = 73,
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.sda_pin = 74,
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};
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static struct platform_device nhk8815_i2c_dev0 = {
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.name = "i2c-gpio",
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.id = 0,
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@ -32,7 +41,7 @@ static struct platform_device nhk8815_i2c_dev0 = {
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.platform_data = &nhk8815_i2c_data0,
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},
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};
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/* second bus: GPIO XX and YY */
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static struct platform_device nhk8815_i2c_dev1 = {
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.name = "i2c-gpio",
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.id = 1,
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@ -41,15 +50,29 @@ static struct platform_device nhk8815_i2c_dev1 = {
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},
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};
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static struct platform_device nhk8815_i2c_dev2 = {
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.name = "i2c-gpio",
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.id = 2,
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.dev = {
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.platform_data = &nhk8815_i2c_data2,
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},
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};
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static pin_cfg_t cpu8815_pins_i2c[] = {
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PIN_CFG_INPUT(62, GPIO, PULLUP),
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PIN_CFG_INPUT(63, GPIO, PULLUP),
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PIN_CFG_INPUT(53, GPIO, PULLUP),
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PIN_CFG_INPUT(54, GPIO, PULLUP),
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PIN_CFG_INPUT(73, GPIO, PULLUP),
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PIN_CFG_INPUT(74, GPIO, PULLUP),
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};
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static int __init nhk8815_i2c_init(void)
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{
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nmk_gpio_set_mode(nhk8815_i2c_data0.scl_pin, NMK_GPIO_ALT_GPIO);
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nmk_gpio_set_mode(nhk8815_i2c_data0.sda_pin, NMK_GPIO_ALT_GPIO);
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nmk_config_pins(cpu8815_pins_i2c, ARRAY_SIZE(cpu8815_pins_i2c));
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platform_device_register(&nhk8815_i2c_dev0);
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nmk_gpio_set_mode(nhk8815_i2c_data1.scl_pin, NMK_GPIO_ALT_GPIO);
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nmk_gpio_set_mode(nhk8815_i2c_data1.sda_pin, NMK_GPIO_ALT_GPIO);
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platform_device_register(&nhk8815_i2c_dev1);
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platform_device_register(&nhk8815_i2c_dev2);
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return 0;
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}
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@ -58,6 +81,7 @@ static void __exit nhk8815_i2c_exit(void)
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{
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platform_device_unregister(&nhk8815_i2c_dev0);
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platform_device_unregister(&nhk8815_i2c_dev1);
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platform_device_unregister(&nhk8815_i2c_dev2);
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return;
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}
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