LXR linux/arch/x86/platform/intel-mid/device_libs/platform

   1// SPDX-License-Identifier: GPL-2.0-only
   2/*
   3 * platform_max7315.c: max7315 platform data initialization file
   4 *
   5 * (C) Copyright 2013 Intel Corporation
   6 * Author: Sathyanarayanan Kuppuswamy <sathyanarayanan.kuppuswamy@intel.com>
   7 */
   8
   9#include <linux/init.h>
  10#include <linux/gpio.h>
  11#include <linux/i2c.h>
  12#include <linux/platform_data/pca953x.h>
  13#include <asm/intel-mid.h>
  14
  15#define MAX7315_NUM 2
  16
  17static void __init *max7315_platform_data(void *info)
  18{
  19        static struct pca953x_platform_data max7315_pdata[MAX7315_NUM];
  20        static int nr;
  21        struct pca953x_platform_data *max7315 = &max7315_pdata[nr];
  22        struct i2c_board_info *i2c_info = info;
  23        int gpio_base, intr;
  24        char base_pin_name[SFI_NAME_LEN + 1];
  25        char intr_pin_name[SFI_NAME_LEN + 1];
  26
  27        if (nr == MAX7315_NUM) {
  28                pr_err("too many max7315s, we only support %d\n",
  29                                MAX7315_NUM);
  30                return NULL;
  31        }
  32        /* we have several max7315 on the board, we only need load several
  33         * instances of the same pca953x driver to cover them
  34         */
  35        strcpy(i2c_info->type, "max7315");
  36        if (nr++) {
  37                snprintf(base_pin_name, sizeof(base_pin_name),
  38                         "max7315_%d_base", nr);
  39                snprintf(intr_pin_name, sizeof(intr_pin_name),
  40                         "max7315_%d_int", nr);
  41        } else {
  42                strcpy(base_pin_name, "max7315_base");
  43                strcpy(intr_pin_name, "max7315_int");
  44        }
  45
  46        gpio_base = get_gpio_by_name(base_pin_name);
  47        intr = get_gpio_by_name(intr_pin_name);
  48
  49        if (gpio_base < 0)
  50                return NULL;
  51        max7315->gpio_base = gpio_base;
  52        if (intr != -1) {
  53                i2c_info->irq = intr + INTEL_MID_IRQ_OFFSET;
  54                max7315->irq_base = gpio_base + INTEL_MID_IRQ_OFFSET;
  55        } else {
  56                i2c_info->irq = -1;
  57                max7315->irq_base = -1;
  58        }
  59        return max7315;
  60}
  61
  62static const struct devs_id max7315_dev_id __initconst = {
  63        .name = "i2c_max7315",
  64        .type = SFI_DEV_TYPE_I2C,
  65        .delay = 1,
  66        .get_platform_data = &max7315_platform_data,
  67};
  68
  69static const struct devs_id max7315_2_dev_id __initconst = {
  70        .name = "i2c_max7315_2",
  71        .type = SFI_DEV_TYPE_I2C,
  72        .delay = 1,
  73        .get_platform_data = &max7315_platform_data,
  74};
  75
  76sfi_device(max7315_dev_id);
  77sfi_device(max7315_2_dev_id);
  78