LXR linux/drivers/regulator/sky81452-regulator.c

   1/*
   2 * sky81452-regulator.c SKY81452 regulator driver
   3 *
   4 * Copyright 2014 Skyworks Solutions Inc.
   5 * Author : Gyungoh Yoo <jack.yoo@skyworksinc.com>
   6 *
   7 * This program is free software; you can redistribute it and/or modify it
   8 * under the terms of the GNU General Public License version 2
   9 * as published by the Free Software Foundation.
  10 *
  11 * This program is distributed in the hope that it will be useful, but
  12 * WITHOUT ANY WARRANTY; without even the implied warranty of
  13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14 * General Public License for more details.
  15 *
  16 * You should have received a copy of the GNU General Public License along
  17 * with this program; if not, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20#include <linux/module.h>
  21#include <linux/kernel.h>
  22#include <linux/platform_device.h>
  23#include <linux/init.h>
  24#include <linux/err.h>
  25#include <linux/of.h>
  26#include <linux/regulator/driver.h>
  27#include <linux/regulator/of_regulator.h>
  28
  29/* registers */
  30#define SKY81452_REG1   0x01
  31#define SKY81452_REG3   0x03
  32
  33/* bit mask */
  34#define SKY81452_LEN    0x40
  35#define SKY81452_LOUT   0x1F
  36
  37static struct regulator_ops sky81452_reg_ops = {
  38        .list_voltage = regulator_list_voltage_linear_range,
  39        .map_voltage = regulator_map_voltage_linear_range,
  40        .get_voltage_sel = regulator_get_voltage_sel_regmap,
  41        .set_voltage_sel = regulator_set_voltage_sel_regmap,
  42        .enable = regulator_enable_regmap,
  43        .disable = regulator_disable_regmap,
  44        .is_enabled = regulator_is_enabled_regmap,
  45};
  46
  47static const struct regulator_linear_range sky81452_reg_ranges[] = {
  48        REGULATOR_LINEAR_RANGE(4500000, 0, 14, 250000),
  49        REGULATOR_LINEAR_RANGE(9000000, 15, 31, 1000000),
  50};
  51
  52static const struct regulator_desc sky81452_reg = {
  53        .name = "LOUT",
  54        .of_match = of_match_ptr("lout"),
  55        .regulators_node = of_match_ptr("regulator"),
  56        .ops = &sky81452_reg_ops,
  57        .type = REGULATOR_VOLTAGE,
  58        .owner = THIS_MODULE,
  59        .n_voltages = SKY81452_LOUT + 1,
  60        .linear_ranges = sky81452_reg_ranges,
  61        .n_linear_ranges = ARRAY_SIZE(sky81452_reg_ranges),
  62        .vsel_reg = SKY81452_REG3,
  63        .vsel_mask = SKY81452_LOUT,
  64        .enable_reg = SKY81452_REG1,
  65        .enable_mask = SKY81452_LEN,
  66};
  67
  68static int sky81452_reg_probe(struct platform_device *pdev)
  69{
  70        struct device *dev = &pdev->dev;
  71        const struct regulator_init_data *init_data = dev_get_platdata(dev);
  72        struct regulator_config config = { };
  73        struct regulator_dev *rdev;
  74
  75        config.dev = dev->parent;
  76        config.init_data = init_data;
  77        config.of_node = dev->of_node;
  78        config.regmap = dev_get_drvdata(dev->parent);
  79
  80        rdev = devm_regulator_register(dev, &sky81452_reg, &config);
  81        if (IS_ERR(rdev)) {
  82                dev_err(dev, "failed to register. err=%ld\n", PTR_ERR(rdev));
  83                return PTR_ERR(rdev);
  84        }
  85
  86        platform_set_drvdata(pdev, rdev);
  87
  88        return 0;
  89}
  90
  91static struct platform_driver sky81452_reg_driver = {
  92        .driver = {
  93                .name = "sky81452-regulator",
  94        },
  95        .probe = sky81452_reg_probe,
  96};
  97
  98module_platform_driver(sky81452_reg_driver);
  99
 100MODULE_DESCRIPTION("Skyworks SKY81452 Regulator driver");
 101MODULE_AUTHOR("Gyungoh Yoo <jack.yoo@skyworksinc.com>");
 102MODULE_LICENSE("GPL v2");
 103