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661d414cb4
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>
90 lines
2.2 KiB
C
90 lines
2.2 KiB
C
#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/i2c.h>
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#include <linux/i2c-algo-bit.h>
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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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* They could, in theory, be driven by the hardware component, but we
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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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/* 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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.dev = {
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.platform_data = &nhk8815_i2c_data0,
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},
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};
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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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.dev = {
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.platform_data = &nhk8815_i2c_data1,
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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_config_pins(cpu8815_pins_i2c, ARRAY_SIZE(cpu8815_pins_i2c));
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platform_device_register(&nhk8815_i2c_dev0);
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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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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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module_init(nhk8815_i2c_init);
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module_exit(nhk8815_i2c_exit);
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