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

   1// SPDX-License-Identifier: GPL-2.0-only
   2/*
   3 * platform_bcm43xx.c: bcm43xx platform data initialization file
   4 *
   5 * (C) Copyright 2016 Intel Corporation
   6 * Author: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
   7 */
   8
   9#include <linux/gpio/machine.h>
  10#include <linux/platform_device.h>
  11#include <linux/regulator/machine.h>
  12#include <linux/regulator/fixed.h>
  13#include <linux/sfi.h>
  14
  15#include <asm/intel-mid.h>
  16
  17#define WLAN_SFI_GPIO_IRQ_NAME          "WLAN-interrupt"
  18#define WLAN_SFI_GPIO_ENABLE_NAME       "WLAN-enable"
  19
  20#define WLAN_DEV_NAME                   "0000:00:01.3"
  21
  22static struct regulator_consumer_supply bcm43xx_vmmc_supply = {
  23        .dev_name               = WLAN_DEV_NAME,
  24        .supply                 = "vmmc",
  25};
  26
  27static struct regulator_init_data bcm43xx_vmmc_data = {
  28        .constraints = {
  29                .valid_ops_mask         = REGULATOR_CHANGE_STATUS,
  30        },
  31        .num_consumer_supplies  = 1,
  32        .consumer_supplies      = &bcm43xx_vmmc_supply,
  33};
  34
  35static struct fixed_voltage_config bcm43xx_vmmc = {
  36        .supply_name            = "bcm43xx-vmmc-regulator",
  37        /*
  38         * Announce 2.0V here to be compatible with SDIO specification. The
  39         * real voltage and signaling are still 1.8V.
  40         */
  41        .microvolts             = 2000000,              /* 1.8V */
  42        .startup_delay          = 250 * 1000,           /* 250ms */
  43        .enabled_at_boot        = 0,                    /* disabled at boot */
  44        .init_data              = &bcm43xx_vmmc_data,
  45};
  46
  47static struct platform_device bcm43xx_vmmc_regulator = {
  48        .name           = "reg-fixed-voltage",
  49        .id             = PLATFORM_DEVID_AUTO,
  50        .dev = {
  51                .platform_data  = &bcm43xx_vmmc,
  52        },
  53};
  54
  55static struct gpiod_lookup_table bcm43xx_vmmc_gpio_table = {
  56        .dev_id = "reg-fixed-voltage.0",
  57        .table  = {
  58                GPIO_LOOKUP("0000:00:0c.0", -1, NULL, GPIO_ACTIVE_LOW),
  59                {}
  60        },
  61};
  62
  63static int __init bcm43xx_regulator_register(void)
  64{
  65        struct gpiod_lookup_table *table = &bcm43xx_vmmc_gpio_table;
  66        struct gpiod_lookup *lookup = table->table;
  67        int ret;
  68
  69        lookup[0].chip_hwnum = get_gpio_by_name(WLAN_SFI_GPIO_ENABLE_NAME);
  70        gpiod_add_lookup_table(table);
  71
  72        ret = platform_device_register(&bcm43xx_vmmc_regulator);
  73        if (ret) {
  74                pr_err("%s: vmmc regulator register failed\n", __func__);
  75                return ret;
  76        }
  77
  78        return 0;
  79}
  80
  81static void __init *bcm43xx_platform_data(void *info)
  82{
  83        int ret;
  84
  85        ret = bcm43xx_regulator_register();
  86        if (ret)
  87                return NULL;
  88
  89        pr_info("Using generic wifi platform data\n");
  90
  91        /* For now it's empty */
  92        return NULL;
  93}
  94
  95static const struct devs_id bcm43xx_clk_vmmc_dev_id __initconst = {
  96        .name                   = "bcm43xx_clk_vmmc",
  97        .type                   = SFI_DEV_TYPE_SD,
  98        .get_platform_data      = &bcm43xx_platform_data,
  99};
 100
 101sfi_device(bcm43xx_clk_vmmc_dev_id);
 102