kernel/arch/x86/platform/intel-mid/device_libs/platform_tca6416.c

   1 /*
   2  * platform_tca6416.c: tca6416 platform data initilization file
   3  *
   4  * (C) Copyright 2013 Intel Corporation
   5  * Author: Sathyanarayanan Kuppuswamy <sathyanarayanan.kuppuswamy@intel.com>
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License
   9  * as published by the Free Software Foundation; version 2
  10  * of the License.
  11  */
  12
  13 #include <linux/platform_data/pca953x.h>
  14 #include <linux/i2c.h>
  15 #include <linux/gpio.h>
  16 #include <asm/intel-mid.h>
  17
  18 #define TCA6416_NAME    "tca6416"
  19 #define TCA6416_BASE    "tca6416_base"
  20 #define TCA6416_INTR    "tca6416_int"
  21
  22 static void *tca6416_platform_data(void *info)
  23 {
  24         static struct pca953x_platform_data tca6416;
  25         struct i2c_board_info *i2c_info = info;
  26         int gpio_base, intr;
  27         char base_pin_name[SFI_NAME_LEN + 1];
  28         char intr_pin_name[SFI_NAME_LEN + 1];
  29
  30         strcpy(i2c_info->type, TCA6416_NAME);
  31         strcpy(base_pin_name, TCA6416_BASE);
  32         strcpy(intr_pin_name, TCA6416_INTR);
  33
  34         gpio_base = get_gpio_by_name(base_pin_name);
  35         intr = get_gpio_by_name(intr_pin_name);
  36
  37         if (gpio_base < 0)
  38                 return NULL;
  39         tca6416.gpio_base = gpio_base;
  40         if (intr >= 0) {
  41                 i2c_info->irq = intr + INTEL_MID_IRQ_OFFSET;
  42                 tca6416.irq_base = gpio_base + INTEL_MID_IRQ_OFFSET;
  43         } else {
  44                 i2c_info->irq = -1;
  45                 tca6416.irq_base = -1;
  46         }
  47         return &tca6416;
  48 }
  49
  50 static const struct devs_id tca6416_dev_id __initconst = {
  51         .name = "tca6416",
  52         .type = SFI_DEV_TYPE_I2C,
  53         .delay = 1,
  54         .get_platform_data = &tca6416_platform_data,
  55 };
  56
  57 sfi_device(tca6416_dev_id);