1 // SPDX-License-Identifier: GPL-2.0 2 // 3 // sky81452-regulator.c SKY81452 regulator driver 4 // 5 // Copyright 2014 Skyworks Solutions Inc. 6 // Author : Gyungoh Yoo <jack.yoo@skyworksinc.com> 7 8 #include <linux/module.h> 9 #include <linux/kernel.h> 10 #include <linux/platform_device.h> 11 #include <linux/init.h> 12 #include <linux/err.h> 13 #include <linux/of.h> 14 #include <linux/regulator/driver.h> 15 #include <linux/regulator/of_regulator.h> 16 17 /* registers */ 18 #define SKY81452_REG1 0x01 19 #define SKY81452_REG3 0x03 20 21 /* bit mask */ 22 #define SKY81452_LEN 0x40 23 #define SKY81452_LOUT 0x1F 24 25 static const struct regulator_ops sky81452_reg_ops = { 26 .list_voltage = regulator_list_voltage_linear_range, 27 .map_voltage = regulator_map_voltage_linear_range, 28 .get_voltage_sel = regulator_get_voltage_sel_regmap, 29 .set_voltage_sel = regulator_set_voltage_sel_regmap, 30 .enable = regulator_enable_regmap, 31 .disable = regulator_disable_regmap, 32 .is_enabled = regulator_is_enabled_regmap, 33 }; 34 35 static const struct linear_range sky81452_reg_ranges[] = { 36 REGULATOR_LINEAR_RANGE(4500000, 0, 14, 250000), 37 REGULATOR_LINEAR_RANGE(9000000, 15, 31, 1000000), 38 }; 39 40 static const struct regulator_desc sky81452_reg = { 41 .name = "LOUT", 42 .of_match = of_match_ptr("lout"), 43 .regulators_node = of_match_ptr("regulator"), 44 .ops = &sky81452_reg_ops, 45 .type = REGULATOR_VOLTAGE, 46 .owner = THIS_MODULE, 47 .n_voltages = SKY81452_LOUT + 1, 48 .linear_ranges = sky81452_reg_ranges, 49 .n_linear_ranges = ARRAY_SIZE(sky81452_reg_ranges), 50 .vsel_reg = SKY81452_REG3, 51 .vsel_mask = SKY81452_LOUT, 52 .enable_reg = SKY81452_REG1, 53 .enable_mask = SKY81452_LEN, 54 }; 55 56 static int sky81452_reg_probe(struct platform_device *pdev) 57 { 58 struct device *dev = &pdev->dev; 59 const struct regulator_init_data *init_data = dev_get_platdata(dev); 60 struct regulator_config config = { }; 61 struct regulator_dev *rdev; 62 63 config.dev = dev->parent; 64 config.init_data = init_data; 65 config.of_node = dev->of_node; 66 config.regmap = dev_get_drvdata(dev->parent); 67 68 rdev = devm_regulator_register(dev, &sky81452_reg, &config); 69 if (IS_ERR(rdev)) { 70 dev_err(dev, "failed to register. err=%ld\n", PTR_ERR(rdev)); 71 return PTR_ERR(rdev); 72 } 73 74 platform_set_drvdata(pdev, rdev); 75 76 return 0; 77 } 78 79 static struct platform_driver sky81452_reg_driver = { 80 .driver = { 81 .name = "sky81452-regulator", 82 .probe_type = PROBE_PREFER_ASYNCHRONOUS, 83 }, 84 .probe = sky81452_reg_probe, 85 }; 86 87 module_platform_driver(sky81452_reg_driver); 88 89 MODULE_DESCRIPTION("Skyworks SKY81452 Regulator driver"); 90 MODULE_AUTHOR("Gyungoh Yoo <jack.yoo@skyworksinc.com>"); 91 MODULE_LICENSE("GPL v2"); 92