103 lines
3 KiB
C
103 lines
3 KiB
C
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/*
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* sky81452-regulator.c SKY81452 regulator driver
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*
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* Copyright 2014 Skyworks Solutions Inc.
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* Author : Gyungoh Yoo <jack.yoo@skyworksinc.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/platform_device.h>
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#include <linux/init.h>
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#include <linux/err.h>
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#include <linux/of.h>
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#include <linux/regulator/driver.h>
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#include <linux/regulator/of_regulator.h>
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/* registers */
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#define SKY81452_REG1 0x01
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#define SKY81452_REG3 0x03
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/* bit mask */
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#define SKY81452_LEN 0x40
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#define SKY81452_LOUT 0x1F
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static struct regulator_ops sky81452_reg_ops = {
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.list_voltage = regulator_list_voltage_linear_range,
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.map_voltage = regulator_map_voltage_linear_range,
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.get_voltage_sel = regulator_get_voltage_sel_regmap,
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.set_voltage_sel = regulator_set_voltage_sel_regmap,
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.enable = regulator_enable_regmap,
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.disable = regulator_disable_regmap,
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.is_enabled = regulator_is_enabled_regmap,
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};
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static const struct regulator_linear_range sky81452_reg_ranges[] = {
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REGULATOR_LINEAR_RANGE(4500000, 0, 14, 250000),
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REGULATOR_LINEAR_RANGE(9000000, 15, 31, 1000000),
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};
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static const struct regulator_desc sky81452_reg = {
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.name = "LOUT",
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.of_match = of_match_ptr("lout"),
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.regulators_node = of_match_ptr("regulator"),
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.ops = &sky81452_reg_ops,
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.type = REGULATOR_VOLTAGE,
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.owner = THIS_MODULE,
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.n_voltages = SKY81452_LOUT + 1,
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.linear_ranges = sky81452_reg_ranges,
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.n_linear_ranges = ARRAY_SIZE(sky81452_reg_ranges),
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.vsel_reg = SKY81452_REG3,
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.vsel_mask = SKY81452_LOUT,
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.enable_reg = SKY81452_REG1,
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.enable_mask = SKY81452_LEN,
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};
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static int sky81452_reg_probe(struct platform_device *pdev)
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{
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struct device *dev = &pdev->dev;
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const struct regulator_init_data *init_data = dev_get_platdata(dev);
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struct regulator_config config = { };
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struct regulator_dev *rdev;
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config.dev = dev->parent;
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config.init_data = init_data;
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config.of_node = dev->of_node;
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config.regmap = dev_get_drvdata(dev->parent);
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rdev = devm_regulator_register(dev, &sky81452_reg, &config);
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if (IS_ERR(rdev)) {
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dev_err(dev, "failed to register. err=%ld\n", PTR_ERR(rdev));
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return PTR_ERR(rdev);
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}
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platform_set_drvdata(pdev, rdev);
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return 0;
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}
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static struct platform_driver sky81452_reg_driver = {
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.driver = {
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.name = "sky81452-regulator",
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},
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.probe = sky81452_reg_probe,
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};
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module_platform_driver(sky81452_reg_driver);
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MODULE_DESCRIPTION("Skyworks SKY81452 Regulator driver");
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MODULE_AUTHOR("Gyungoh Yoo <jack.yoo@skyworksinc.com>");
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MODULE_LICENSE("GPL v2");
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