/* * platform_bcm43xx.c: bcm43xx platform data initialization file * * (C) Copyright 2016 Intel Corporation * Author: Andy Shevchenko <andriy.shevchenko@linux.intel.com> * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; version 2 * of the License. */ #include <linux/gpio/machine.h> #include <linux/platform_device.h> #include <linux/regulator/machine.h> #include <linux/regulator/fixed.h> #include <linux/sfi.h> #include <asm/intel-mid.h> #define WLAN_SFI_GPIO_IRQ_NAME "WLAN-interrupt" #define WLAN_SFI_GPIO_ENABLE_NAME "WLAN-enable" #define WLAN_DEV_NAME "0000:00:01.3" static struct regulator_consumer_supply bcm43xx_vmmc_supply = { .dev_name = WLAN_DEV_NAME, .supply = "vmmc", }; static struct regulator_init_data bcm43xx_vmmc_data = { .constraints = { .valid_ops_mask = REGULATOR_CHANGE_STATUS, }, .num_consumer_supplies = 1, .consumer_supplies = &bcm43xx_vmmc_supply, }; static struct fixed_voltage_config bcm43xx_vmmc = { .supply_name = "bcm43xx-vmmc-regulator", /* * Announce 2.0V here to be compatible with SDIO specification. The * real voltage and signaling are still 1.8V. */ .microvolts = 2000000, /* 1.8V */ .startup_delay = 250 * 1000, /* 250ms */ .enable_high = 1, /* active high */ .enabled_at_boot = 0, /* disabled at boot */ .init_data = &bcm43xx_vmmc_data, }; static struct platform_device bcm43xx_vmmc_regulator = { .name = "reg-fixed-voltage", .id = PLATFORM_DEVID_AUTO, .dev = { .platform_data = &bcm43xx_vmmc, }, }; static struct gpiod_lookup_table bcm43xx_vmmc_gpio_table = { .dev_id = "reg-fixed-voltage.0", .table = { GPIO_LOOKUP("0000:00:0c.0", -1, NULL, GPIO_ACTIVE_LOW), {} }, }; static int __init bcm43xx_regulator_register(void) { struct gpiod_lookup_table *table = &bcm43xx_vmmc_gpio_table; struct gpiod_lookup *lookup = table->table; int ret; lookup[0].chip_hwnum = get_gpio_by_name(WLAN_SFI_GPIO_ENABLE_NAME); gpiod_add_lookup_table(table); ret = platform_device_register(&bcm43xx_vmmc_regulator); if (ret) { pr_err("%s: vmmc regulator register failed\n", __func__); return ret; } return 0; } static void __init *bcm43xx_platform_data(void *info) { int ret; ret = bcm43xx_regulator_register(); if (ret) return NULL; pr_info("Using generic wifi platform data\n"); /* For now it's empty */ return NULL; } static const struct devs_id bcm43xx_clk_vmmc_dev_id __initconst = { .name = "bcm43xx_clk_vmmc", .type = SFI_DEV_TYPE_SD, .get_platform_data = &bcm43xx_platform_data, }; sfi_device(bcm43xx_clk_vmmc_dev_id);