release/src-rt-6.x.4708/linux/linux-2.6.36/arch/arm/mach-nomadik/i2c-8815nhk.c

   1 #include <linux/module.h>
   2 #include <linux/init.h>
   3 #include <linux/i2c.h>
   4 #include <linux/i2c-algo-bit.h>
   5 #include <linux/i2c-gpio.h>
   6 #include <linux/gpio.h>
   7 #include <linux/platform_device.h>
   8
   9 /*
  10  * There are two busses in the 8815NHK.
  11  * They could, in theory, be driven by the hardware component, but we
  12  * use bit-bang through GPIO by now, to keep things simple
  13  */
  14
  15 static struct i2c_gpio_platform_data nhk8815_i2c_data0 = {
  16         /* keep defaults for timeouts; pins are push-pull bidirectional */
  17         .scl_pin = 62,
  18         .sda_pin = 63,
  19 };
  20
  21 static struct i2c_gpio_platform_data nhk8815_i2c_data1 = {
  22         /* keep defaults for timeouts; pins are push-pull bidirectional */
  23         .scl_pin = 53,
  24         .sda_pin = 54,
  25 };
  26
  27 /* first bus: GPIO XX and YY */
  28 static struct platform_device nhk8815_i2c_dev0 = {
  29         .name   = "i2c-gpio",
  30         .id     = 0,
  31         .dev    = {
  32                 .platform_data = &nhk8815_i2c_data0,
  33         },
  34 };
  35 /* second bus: GPIO XX and YY */
  36 static struct platform_device nhk8815_i2c_dev1 = {
  37         .name   = "i2c-gpio",
  38         .id     = 1,
  39         .dev    = {
  40                 .platform_data = &nhk8815_i2c_data1,
  41         },
  42 };
  43
  44 static int __init nhk8815_i2c_init(void)
  45 {
  46         nmk_gpio_set_mode(nhk8815_i2c_data0.scl_pin, NMK_GPIO_ALT_GPIO);
  47         nmk_gpio_set_mode(nhk8815_i2c_data0.sda_pin, NMK_GPIO_ALT_GPIO);
  48         platform_device_register(&nhk8815_i2c_dev0);
  49
  50         nmk_gpio_set_mode(nhk8815_i2c_data1.scl_pin, NMK_GPIO_ALT_GPIO);
  51         nmk_gpio_set_mode(nhk8815_i2c_data1.sda_pin, NMK_GPIO_ALT_GPIO);
  52         platform_device_register(&nhk8815_i2c_dev1);
  53
  54         return 0;
  55 }
  56
  57 static void __exit nhk8815_i2c_exit(void)
  58 {
  59         platform_device_unregister(&nhk8815_i2c_dev0);
  60         platform_device_unregister(&nhk8815_i2c_dev1);
  61         return;
  62 }
  63
  64 module_init(nhk8815_i2c_init);
  65 module_exit(nhk8815_i2c_exit);