mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
103 lines
2.7 KiB
103 lines
2.7 KiB
// SPDX-License-Identifier: GPL-2.0-only |
|
/* |
|
* Regulator driver for STw4810/STw4811 VMMC regulator. |
|
* |
|
* Copyright (C) 2013 ST-Ericsson SA |
|
* Written on behalf of Linaro for ST-Ericsson |
|
* |
|
* Author: Linus Walleij <[email protected]> |
|
*/ |
|
|
|
#include <linux/err.h> |
|
#include <linux/init.h> |
|
#include <linux/mfd/stw481x.h> |
|
#include <linux/module.h> |
|
#include <linux/platform_device.h> |
|
#include <linux/regulator/driver.h> |
|
#include <linux/regulator/of_regulator.h> |
|
|
|
static const unsigned int stw481x_vmmc_voltages[] = { |
|
1800000, |
|
1800000, |
|
2850000, |
|
3000000, |
|
1850000, |
|
2600000, |
|
2700000, |
|
3300000, |
|
}; |
|
|
|
static const struct regulator_ops stw481x_vmmc_ops = { |
|
.list_voltage = regulator_list_voltage_table, |
|
.enable = regulator_enable_regmap, |
|
.disable = regulator_disable_regmap, |
|
.is_enabled = regulator_is_enabled_regmap, |
|
.get_voltage_sel = regulator_get_voltage_sel_regmap, |
|
.set_voltage_sel = regulator_set_voltage_sel_regmap, |
|
}; |
|
|
|
static const struct regulator_desc vmmc_regulator = { |
|
.name = "VMMC", |
|
.id = 0, |
|
.ops = &stw481x_vmmc_ops, |
|
.type = REGULATOR_VOLTAGE, |
|
.owner = THIS_MODULE, |
|
.n_voltages = ARRAY_SIZE(stw481x_vmmc_voltages), |
|
.volt_table = stw481x_vmmc_voltages, |
|
.enable_time = 200, /* FIXME: look this up */ |
|
.enable_reg = STW_CONF1, |
|
.enable_mask = STW_CONF1_PDN_VMMC | STW_CONF1_MMC_LS_STATUS, |
|
.enable_val = STW_CONF1_PDN_VMMC, |
|
.vsel_reg = STW_CONF1, |
|
.vsel_mask = STW_CONF1_VMMC_MASK, |
|
}; |
|
|
|
static int stw481x_vmmc_regulator_probe(struct platform_device *pdev) |
|
{ |
|
struct stw481x *stw481x = dev_get_platdata(&pdev->dev); |
|
struct regulator_config config = { }; |
|
struct regulator_dev *rdev; |
|
int ret; |
|
|
|
/* First disable the external VMMC if it's active */ |
|
ret = regmap_update_bits(stw481x->map, STW_CONF2, |
|
STW_CONF2_VMMC_EXT, 0); |
|
if (ret) { |
|
dev_err(&pdev->dev, "could not disable external VMMC\n"); |
|
return ret; |
|
} |
|
|
|
/* Register VMMC regulator */ |
|
config.dev = &pdev->dev; |
|
config.driver_data = stw481x; |
|
config.regmap = stw481x->map; |
|
config.of_node = pdev->dev.of_node; |
|
config.init_data = of_get_regulator_init_data(&pdev->dev, |
|
pdev->dev.of_node, |
|
&vmmc_regulator); |
|
|
|
rdev = devm_regulator_register(&pdev->dev, &vmmc_regulator, &config); |
|
if (IS_ERR(rdev)) { |
|
dev_err(&pdev->dev, |
|
"error initializing STw481x VMMC regulator\n"); |
|
return PTR_ERR(rdev); |
|
} |
|
|
|
dev_info(&pdev->dev, "initialized STw481x VMMC regulator\n"); |
|
return 0; |
|
} |
|
|
|
static const struct of_device_id stw481x_vmmc_match[] = { |
|
{ .compatible = "st,stw481x-vmmc", }, |
|
{}, |
|
}; |
|
|
|
static struct platform_driver stw481x_vmmc_regulator_driver = { |
|
.driver = { |
|
.name = "stw481x-vmmc-regulator", |
|
.of_match_table = stw481x_vmmc_match, |
|
}, |
|
.probe = stw481x_vmmc_regulator_probe, |
|
}; |
|
|
|
module_platform_driver(stw481x_vmmc_regulator_driver);
|
|
|