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i2c-8815nhk.c

#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);

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