arch/x86/platform/intel-mid/device_libs/platform_pcal9555a.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * PCAL9555a platform data initialization file
   4  *
   5  * Copyright (C) 2016, Intel Corporation
   6  *
   7  * Authors: Andy Shevchenko <[email protected]>
   8  *          Dan O'Donovan <[email protected]>
   9  */
  10
  11 #include <linux/gpio.h>
  12 #include <linux/init.h>
  13 #include <linux/i2c.h>
  14 #include <linux/platform_data/pca953x.h>
  15 #include <linux/sfi.h>
  16
  17 #include <asm/intel-mid.h>
  18
  19 #define PCAL9555A_NUM   4
  20
  21 static struct pca953x_platform_data pcal9555a_pdata[PCAL9555A_NUM];
  22 static int nr;
  23
  24 static void __init *pcal9555a_platform_data(void *info)
  25 {
  26         struct i2c_board_info *i2c_info = info;
  27         char *type = i2c_info->type;
  28         struct pca953x_platform_data *pcal9555a;
  29         char base_pin_name[SFI_NAME_LEN + 1];
  30         char intr_pin_name[SFI_NAME_LEN + 1];
  31         int gpio_base, intr;
  32
  33         snprintf(base_pin_name, sizeof(base_pin_name), "%s_base", type);
  34         snprintf(intr_pin_name, sizeof(intr_pin_name), "%s_int", type);
  35
  36         gpio_base = get_gpio_by_name(base_pin_name);
  37         intr = get_gpio_by_name(intr_pin_name);
  38
  39         /* Check if the SFI record valid */
  40         if (gpio_base == -1)
  41                 return NULL;
  42
  43         if (nr >= PCAL9555A_NUM) {
  44                 pr_err("%s: Too many instances, only %d supported\n", __func__,
  45                        PCAL9555A_NUM);
  46                 return NULL;
  47         }
  48
  49         pcal9555a = &pcal9555a_pdata[nr++];
  50         pcal9555a->gpio_base = gpio_base;
  51
  52         if (intr >= 0) {
  53                 i2c_info->irq = intr + INTEL_MID_IRQ_OFFSET;
  54                 pcal9555a->irq_base = gpio_base + INTEL_MID_IRQ_OFFSET;
  55         } else {
  56                 i2c_info->irq = -1;
  57                 pcal9555a->irq_base = -1;
  58         }
  59
  60         strcpy(type, "pcal9555a");
  61         return pcal9555a;
  62 }
  63
  64 static const struct devs_id pcal9555a_1_dev_id __initconst = {
  65         .name                   = "pcal9555a-1",
  66         .type                   = SFI_DEV_TYPE_I2C,
  67         .delay                  = 1,
  68         .get_platform_data      = &pcal9555a_platform_data,
  69 };
  70
  71 static const struct devs_id pcal9555a_2_dev_id __initconst = {
  72         .name                   = "pcal9555a-2",
  73         .type                   = SFI_DEV_TYPE_I2C,
  74         .delay                  = 1,
  75         .get_platform_data      = &pcal9555a_platform_data,
  76 };
  77
  78 static const struct devs_id pcal9555a_3_dev_id __initconst = {
  79         .name                   = "pcal9555a-3",
  80         .type                   = SFI_DEV_TYPE_I2C,
  81         .delay                  = 1,
  82         .get_platform_data      = &pcal9555a_platform_data,
  83 };
  84
  85 static const struct devs_id pcal9555a_4_dev_id __initconst = {
  86         .name                   = "pcal9555a-4",
  87         .type                   = SFI_DEV_TYPE_I2C,
  88         .delay                  = 1,
  89         .get_platform_data      = &pcal9555a_platform_data,
  90 };
  91
  92 sfi_device(pcal9555a_1_dev_id);
  93 sfi_device(pcal9555a_2_dev_id);
  94 sfi_device(pcal9555a_3_dev_id);
  95 sfi_device(pcal9555a_4_dev_id);