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 <linux/platform_data/pinctrl-nomadik.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 /* I2C0 connected to the STw4811 power management chip */
  16 static struct i2c_gpio_platform_data nhk8815_i2c_data0 = {
  17         /* keep defaults for timeouts; pins are push-pull bidirectional */
  18         .scl_pin = 62,
  19         .sda_pin = 63,
  20 };
  21
  22 /* I2C1 connected to various sensors */
  23 static struct i2c_gpio_platform_data nhk8815_i2c_data1 = {
  24         /* keep defaults for timeouts; pins are push-pull bidirectional */
  25         .scl_pin = 53,
  26         .sda_pin = 54,
  27 };
  28
  29 /* I2C2 connected to the USB portions of the STw4811 only */
  30 static struct i2c_gpio_platform_data nhk8815_i2c_data2 = {
  31         /* keep defaults for timeouts; pins are push-pull bidirectional */
  32         .scl_pin = 73,
  33         .sda_pin = 74,
  34 };
  35
  36 static struct platform_device nhk8815_i2c_dev0 = {
  37         .name   = "i2c-gpio",
  38         .id     = 0,
  39         .dev    = {
  40                 .platform_data = &nhk8815_i2c_data0,
  41         },
  42 };
  43
  44 static struct platform_device nhk8815_i2c_dev1 = {
  45         .name   = "i2c-gpio",
  46         .id     = 1,
  47         .dev    = {
  48                 .platform_data = &nhk8815_i2c_data1,
  49         },
  50 };
  51
  52 static struct platform_device nhk8815_i2c_dev2 = {
  53         .name   = "i2c-gpio",
  54         .id     = 2,
  55         .dev    = {
  56                 .platform_data = &nhk8815_i2c_data2,
  57         },
  58 };
  59
  60 static pin_cfg_t cpu8815_pins_i2c[] = {
  61         PIN_CFG_INPUT(62, GPIO, PULLUP),
  62         PIN_CFG_INPUT(63, GPIO, PULLUP),
  63         PIN_CFG_INPUT(53, GPIO, PULLUP),
  64         PIN_CFG_INPUT(54, GPIO, PULLUP),
  65         PIN_CFG_INPUT(73, GPIO, PULLUP),
  66         PIN_CFG_INPUT(74, GPIO, PULLUP),
  67 };
  68
  69 static int __init nhk8815_i2c_init(void)
  70 {
  71         nmk_config_pins(cpu8815_pins_i2c, ARRAY_SIZE(cpu8815_pins_i2c));
  72         platform_device_register(&nhk8815_i2c_dev0);
  73         platform_device_register(&nhk8815_i2c_dev1);
  74         platform_device_register(&nhk8815_i2c_dev2);
  75
  76         return 0;
  77 }
  78
  79 static void __exit nhk8815_i2c_exit(void)
  80 {
  81         platform_device_unregister(&nhk8815_i2c_dev0);
  82         platform_device_unregister(&nhk8815_i2c_dev1);
  83         platform_device_unregister(&nhk8815_i2c_dev2);
  84         return;
  85 }
  86
  87 module_init(nhk8815_i2c_init);
  88 module_exit(nhk8815_i2c_exit);