projects / deliverable / linux.git / blame
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|---|---|---|
| 9839d627 GY |
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 as published by the | |
| 9 | * Free Software Foundation; either version 2, or (at your option) any | |
| 10 | * later version. | |
| 11 | * | |
| 12 | * This program is distributed in the hope that it will be useful, but | |
| 13 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 15 | * General Public License for more details. | |
| 16 | * | |
| 17 | * You should have received a copy of the GNU General Public License along | |
| 18 | * with this program; if not, see <http://www.gnu.org/licenses/>. | |
| 19 | */ | |
| 20 | ||
| 21 | #include <linux/module.h> | |
| 22 | #include <linux/kernel.h> | |
| 23 | #include <linux/platform_device.h> | |
| 24 | #include <linux/init.h> | |
| 25 | #include <linux/err.h> | |
| 26 | #include <linux/of.h> | |
| 27 | #include <linux/regulator/driver.h> | |
| 28 | #include <linux/regulator/of_regulator.h> | |
| 29 | ||
| 30 | /* registers */ | |
| 31 | #define SKY81452_REG1 0x01 | |
| 32 | #define SKY81452_REG3 0x03 | |
| 33 | ||
| 34 | /* bit mask */ | |
| 35 | #define SKY81452_LEN 0x40 | |
| 36 | #define SKY81452_LOUT 0x1F | |
| 37 | ||
| 38 | static struct regulator_ops sky81452_reg_ops = { | |
| 39 | .list_voltage = regulator_list_voltage_linear_range, | |
| 40 | .map_voltage = regulator_map_voltage_linear_range, | |
| 41 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
| 42 | .set_voltage_sel = regulator_set_voltage_sel_regmap, | |
| 43 | .enable = regulator_enable_regmap, | |
| 44 | .disable = regulator_disable_regmap, | |
| 45 | .is_enabled = regulator_is_enabled_regmap, | |
| 46 | }; | |
| 47 | ||
| 48 | static const struct regulator_linear_range sky81452_reg_ranges[] = { | |
| 49 | REGULATOR_LINEAR_RANGE(4500000, 0, 14, 250000), | |
| 50 | REGULATOR_LINEAR_RANGE(9000000, 15, 31, 1000000), | |
| 51 | }; | |
| 52 | ||
| 53 | static const struct regulator_desc sky81452_reg = { | |
| 54 | .name = "LOUT", | |
| 55 | .ops = &sky81452_reg_ops, | |
| 56 | .type = REGULATOR_VOLTAGE, | |
| 57 | .owner = THIS_MODULE, | |
| 58 | .n_voltages = SKY81452_LOUT + 1, | |
| 59 | .linear_ranges = sky81452_reg_ranges, | |
| 60 | .n_linear_ranges = ARRAY_SIZE(sky81452_reg_ranges), | |
| 61 | .vsel_reg = SKY81452_REG3, | |
| 62 | .vsel_mask = SKY81452_LOUT, | |
| 63 | .enable_reg = SKY81452_REG1, | |
| 64 | .enable_mask = SKY81452_LEN, | |
| 65 | }; | |
| 66 | ||
| 67 | #ifdef CONFIG_OF | |
| 68 | static struct regulator_init_data *sky81452_reg_parse_dt(struct device *dev) | |
| 69 | { | |
| 70 | struct regulator_init_data *init_data; | |
| 71 | struct device_node *np; | |
| 72 | ||
| 73 | np = of_get_child_by_name(dev->parent->of_node, "regulator"); | |
| 74 | if (unlikely(!np)) { | |
| 75 | dev_err(dev, "regulator node not found"); | |
| 76 | return NULL; | |
| 77 | } | |
| 78 | ||
| 79 | init_data = of_get_regulator_init_data(dev, np); | |
| 80 | ||
| 81 | of_node_put(np); | |
| 82 | return init_data; | |
| 83 | } | |
| 84 | #else | |
| 85 | static struct regulator_init_data *sky81452_reg_parse_dt(struct device *dev) | |
| 86 | { | |
| 87 | return ERR_PTR(-EINVAL); | |
| 88 | } | |
| 89 | #endif | |
| 90 | ||
| 91 | static int sky81452_reg_probe(struct platform_device *pdev) | |
| 92 | { | |
| 93 | struct device *dev = &pdev->dev; | |
| 94 | const struct regulator_init_data *init_data = dev_get_platdata(dev); | |
| 95 | struct regulator_config config = { }; | |
| 96 | struct regulator_dev *rdev; | |
| 97 | ||
| 98 | if (!init_data) { | |
| 99 | init_data = sky81452_reg_parse_dt(dev); | |
| 100 | if (IS_ERR(init_data)) | |
| 101 | return PTR_ERR(init_data); | |
| 102 | } | |
| 103 | ||
| 104 | config.dev = dev; | |
| 105 | config.init_data = init_data; | |
| 106 | config.of_node = dev->of_node; | |
| 107 | config.regmap = dev_get_drvdata(dev->parent); | |
| 108 | ||
| 109 | rdev = devm_regulator_register(dev, &sky81452_reg, &config); | |
| 110 | if (IS_ERR(rdev)) | |
| 111 | return PTR_ERR(rdev); | |
| 112 | ||
| 113 | platform_set_drvdata(pdev, rdev); | |
| 114 | ||
| 115 | return 0; | |
| 116 | } | |
| 117 | ||
| 118 | static struct platform_driver sky81452_reg_driver = { | |
| 119 | .driver = { | |
| 120 | .name = "sky81452-regulator", | |
| 121 | }, | |
| 122 | .probe = sky81452_reg_probe, | |
| 123 | }; | |
| 124 | ||
| 125 | module_platform_driver(sky81452_reg_driver); | |
| 126 | ||
| 127 | MODULE_DESCRIPTION("Skyworks SKY81452 Regulator driver"); | |
| 128 | MODULE_AUTHOR("Gyungoh Yoo <jack.yoo@skyworksinc.com>"); | |
| 129 | MODULE_LICENSE("GPL"); | |
| 130 | MODULE_VERSION("1.0"); |