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/platform_device.h>
   7 #include <plat/gpio-nomadik.h>
   8 #include <plat/pincfg.h>
   9
  10 /*
  11  * There are two busses in the 8815NHK.
  12  * They could, in theory, be driven by the hardware component, but we
  13  * use bit-bang through GPIO by now, to keep things simple
  14  */
  15
  16 /* I2C0 connected to the STw4811 power management chip */
  17 static struct i2c_gpio_platform_data nhk8815_i2c_data0 = {
  18         /* keep defaults for timeouts; pins are push-pull bidirectional */
  19         .scl_pin = 62,
  20         .sda_pin = 63,
  21 };
  22
  23 /* I2C1 connected to various sensors */
  24 static struct i2c_gpio_platform_data nhk8815_i2c_data1 = {
  25         /* keep defaults for timeouts; pins are push-pull bidirectional */
  26         .scl_pin = 53,
  27         .sda_pin = 54,
  28 };
  29
  30 /* I2C2 connected to the USB portions of the STw4811 only */
  31 static struct i2c_gpio_platform_data nhk8815_i2c_data2 = {
  32         /* keep defaults for timeouts; pins are push-pull bidirectional */
  33         .scl_pin = 73,
  34         .sda_pin = 74,
  35 };
  36
  37 static struct platform_device nhk8815_i2c_dev0 = {
  38         .name   = "i2c-gpio",
  39         .id     = 0,
  40         .dev    = {
  41                 .platform_data = &nhk8815_i2c_data0,
  42         },
  43 };
  44
  45 static struct platform_device nhk8815_i2c_dev1 = {
  46         .name   = "i2c-gpio",
  47         .id     = 1,
  48         .dev    = {
  49                 .platform_data = &nhk8815_i2c_data1,
  50         },
  51 };
  52
  53 static struct platform_device nhk8815_i2c_dev2 = {
  54         .name   = "i2c-gpio",
  55         .id     = 2,
  56         .dev    = {
  57                 .platform_data = &nhk8815_i2c_data2,
  58         },
  59 };
  60
  61 static pin_cfg_t cpu8815_pins_i2c[] = {
  62         PIN_CFG_INPUT(62, GPIO, PULLUP),
  63         PIN_CFG_INPUT(63, GPIO, PULLUP),
  64         PIN_CFG_INPUT(53, GPIO, PULLUP),
  65         PIN_CFG_INPUT(54, GPIO, PULLUP),
  66         PIN_CFG_INPUT(73, GPIO, PULLUP),
  67         PIN_CFG_INPUT(74, GPIO, PULLUP),
  68 };
  69
  70 static int __init nhk8815_i2c_init(void)
  71 {
  72         nmk_config_pins(cpu8815_pins_i2c, ARRAY_SIZE(cpu8815_pins_i2c));
  73         platform_device_register(&nhk8815_i2c_dev0);
  74         platform_device_register(&nhk8815_i2c_dev1);
  75         platform_device_register(&nhk8815_i2c_dev2);
  76
  77         return 0;
  78 }
  79
  80 static void __exit nhk8815_i2c_exit(void)
  81 {
  82         platform_device_unregister(&nhk8815_i2c_dev0);
  83         platform_device_unregister(&nhk8815_i2c_dev1);
  84         platform_device_unregister(&nhk8815_i2c_dev2);
  85         return;
  86 }
  87
  88 module_init(nhk8815_i2c_init);
  89 module_exit(nhk8815_i2c_exit);