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