drivers/regulator/sky81452-regulator.c

0001 // SPDX-License-Identifier: GPL-2.0
0002 //
0003 // sky81452-regulator.c SKY81452 regulator driver
0004 //
0005 // Copyright 2014 Skyworks Solutions Inc.
0006 // Author : Gyungoh Yoo <jack.yoo@skyworksinc.com>
0007
0008 #include <linux/module.h>
0009 #include <linux/kernel.h>
0010 #include <linux/platform_device.h>
0011 #include <linux/init.h>
0012 #include <linux/err.h>
0013 #include <linux/of.h>
0014 #include <linux/regulator/driver.h>
0015 #include <linux/regulator/of_regulator.h>
0016
0017 /* registers */
0018 #define SKY81452_REG1   0x01
0019 #define SKY81452_REG3   0x03
0020
0021 /* bit mask */
0022 #define SKY81452_LEN    0x40
0023 #define SKY81452_LOUT   0x1F
0024
0025 static const struct regulator_ops sky81452_reg_ops = {
0026     .list_voltage = regulator_list_voltage_linear_range,
0027     .map_voltage = regulator_map_voltage_linear_range,
0028     .get_voltage_sel = regulator_get_voltage_sel_regmap,
0029     .set_voltage_sel = regulator_set_voltage_sel_regmap,
0030     .enable = regulator_enable_regmap,
0031     .disable = regulator_disable_regmap,
0032     .is_enabled = regulator_is_enabled_regmap,
0033 };
0034
0035 static const struct linear_range sky81452_reg_ranges[] = {
0036     REGULATOR_LINEAR_RANGE(4500000, 0, 14, 250000),
0037     REGULATOR_LINEAR_RANGE(9000000, 15, 31, 1000000),
0038 };
0039
0040 static const struct regulator_desc sky81452_reg = {
0041     .name = "LOUT",
0042     .of_match = of_match_ptr("lout"),
0043     .regulators_node = of_match_ptr("regulator"),
0044     .ops = &sky81452_reg_ops,
0045     .type = REGULATOR_VOLTAGE,
0046     .owner = THIS_MODULE,
0047     .n_voltages = SKY81452_LOUT + 1,
0048     .linear_ranges = sky81452_reg_ranges,
0049     .n_linear_ranges = ARRAY_SIZE(sky81452_reg_ranges),
0050     .vsel_reg = SKY81452_REG3,
0051     .vsel_mask = SKY81452_LOUT,
0052     .enable_reg = SKY81452_REG1,
0053     .enable_mask = SKY81452_LEN,
0054 };
0055
0056 static int sky81452_reg_probe(struct platform_device *pdev)
0057 {
0058     struct device *dev = &pdev->dev;
0059     const struct regulator_init_data *init_data = dev_get_platdata(dev);
0060     struct regulator_config config = { };
0061     struct regulator_dev *rdev;
0062
0063     config.dev = dev->parent;
0064     config.init_data = init_data;
0065     config.of_node = dev->of_node;
0066     config.regmap = dev_get_drvdata(dev->parent);
0067
0068     rdev = devm_regulator_register(dev, &sky81452_reg, &config);
0069     if (IS_ERR(rdev)) {
0070         dev_err(dev, "failed to register. err=%ld\n", PTR_ERR(rdev));
0071         return PTR_ERR(rdev);
0072     }
0073
0074     platform_set_drvdata(pdev, rdev);
0075
0076     return 0;
0077 }
0078
0079 static struct platform_driver sky81452_reg_driver = {
0080     .driver = {
0081         .name = "sky81452-regulator",
0082     },
0083     .probe = sky81452_reg_probe,
0084 };
0085
0086 module_platform_driver(sky81452_reg_driver);
0087
0088 MODULE_DESCRIPTION("Skyworks SKY81452 Regulator driver");
0089 MODULE_AUTHOR("Gyungoh Yoo <jack.yoo@skyworksinc.com>");
0090 MODULE_LICENSE("GPL v2");