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 37 static 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 47 static 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 52 static 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 68 static 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 91 static struct platform_driver sky81452_reg_driver = { 92 .driver = { 93 .name = "sky81452-regulator", 94 }, 95 .probe = sky81452_reg_probe, 96 }; 97 98 module_platform_driver(sky81452_reg_driver); 99 100 MODULE_DESCRIPTION("Skyworks SKY81452 Regulator driver"); 101 MODULE_AUTHOR("Gyungoh Yoo <jack.yoo@skyworksinc.com>"); 102 MODULE_LICENSE("GPL v2"); 103