172 lines · c
1// SPDX-License-Identifier: GPL-2.0-only2/*3 * Regulator driver for RICOH RC5T583 power management chip.4 *5 * Copyright (c) 2011-2012, NVIDIA CORPORATION. All rights reserved.6 * Author: Laxman dewangan <ldewangan@nvidia.com>7 *8 * based on code9 * Copyright (C) 2011 RICOH COMPANY,LTD10 */11 12#include <linux/module.h>13#include <linux/init.h>14#include <linux/slab.h>15#include <linux/err.h>16#include <linux/platform_device.h>17#include <linux/regulator/driver.h>18#include <linux/regulator/machine.h>19#include <linux/mfd/rc5t583.h>20 21struct rc5t583_regulator_info {22 int deepsleep_id;23 24 /* Regulator register address.*/25 uint8_t reg_disc_reg;26 uint8_t disc_bit;27 uint8_t deepsleep_reg;28 29 /* Regulator specific turn-on delay and voltage settling time*/30 int enable_uv_per_us;31 32 /* Used by regulator core */33 struct regulator_desc desc;34};35 36static int rc5t583_regulator_enable_time(struct regulator_dev *rdev)37{38 struct rc5t583_regulator_info *reg_info = rdev_get_drvdata(rdev);39 int vsel = regulator_get_voltage_sel_regmap(rdev);40 int curr_uV = regulator_list_voltage_linear(rdev, vsel);41 42 return DIV_ROUND_UP(curr_uV, reg_info->enable_uv_per_us);43}44 45static const struct regulator_ops rc5t583_ops = {46 .is_enabled = regulator_is_enabled_regmap,47 .enable = regulator_enable_regmap,48 .disable = regulator_disable_regmap,49 .enable_time = rc5t583_regulator_enable_time,50 .get_voltage_sel = regulator_get_voltage_sel_regmap,51 .set_voltage_sel = regulator_set_voltage_sel_regmap,52 .list_voltage = regulator_list_voltage_linear,53 .map_voltage = regulator_map_voltage_linear,54 .set_voltage_time_sel = regulator_set_voltage_time_sel,55};56 57#define RC5T583_REG(_id, _en_reg, _en_bit, _disc_reg, _disc_bit, \58 _vout_mask, _min_mv, _max_mv, _step_uV, _enable_mv) \59{ \60 .reg_disc_reg = RC5T583_REG_##_disc_reg, \61 .disc_bit = _disc_bit, \62 .deepsleep_reg = RC5T583_REG_##_id##DAC_DS, \63 .enable_uv_per_us = _enable_mv * 1000, \64 .deepsleep_id = RC5T583_DS_##_id, \65 .desc = { \66 .name = "rc5t583-regulator-"#_id, \67 .id = RC5T583_REGULATOR_##_id, \68 .n_voltages = (_max_mv - _min_mv) * 1000 / _step_uV + 1, \69 .ops = &rc5t583_ops, \70 .type = REGULATOR_VOLTAGE, \71 .owner = THIS_MODULE, \72 .vsel_reg = RC5T583_REG_##_id##DAC, \73 .vsel_mask = _vout_mask, \74 .enable_reg = RC5T583_REG_##_en_reg, \75 .enable_mask = BIT(_en_bit), \76 .min_uV = _min_mv * 1000, \77 .uV_step = _step_uV, \78 .ramp_delay = 40 * 1000, \79 }, \80}81 82static struct rc5t583_regulator_info rc5t583_reg_info[RC5T583_REGULATOR_MAX] = {83 RC5T583_REG(DC0, DC0CTL, 0, DC0CTL, 1, 0x7F, 700, 1500, 12500, 4),84 RC5T583_REG(DC1, DC1CTL, 0, DC1CTL, 1, 0x7F, 700, 1500, 12500, 14),85 RC5T583_REG(DC2, DC2CTL, 0, DC2CTL, 1, 0x7F, 900, 2400, 12500, 14),86 RC5T583_REG(DC3, DC3CTL, 0, DC3CTL, 1, 0x7F, 900, 2400, 12500, 14),87 RC5T583_REG(LDO0, LDOEN2, 0, LDODIS2, 0, 0x7F, 900, 3400, 25000, 160),88 RC5T583_REG(LDO1, LDOEN2, 1, LDODIS2, 1, 0x7F, 900, 3400, 25000, 160),89 RC5T583_REG(LDO2, LDOEN2, 2, LDODIS2, 2, 0x7F, 900, 3400, 25000, 160),90 RC5T583_REG(LDO3, LDOEN2, 3, LDODIS2, 3, 0x7F, 900, 3400, 25000, 160),91 RC5T583_REG(LDO4, LDOEN2, 4, LDODIS2, 4, 0x3F, 750, 1500, 12500, 133),92 RC5T583_REG(LDO5, LDOEN2, 5, LDODIS2, 5, 0x7F, 900, 3400, 25000, 267),93 RC5T583_REG(LDO6, LDOEN2, 6, LDODIS2, 6, 0x7F, 900, 3400, 25000, 133),94 RC5T583_REG(LDO7, LDOEN2, 7, LDODIS2, 7, 0x7F, 900, 3400, 25000, 233),95 RC5T583_REG(LDO8, LDOEN1, 0, LDODIS1, 0, 0x7F, 900, 3400, 25000, 233),96 RC5T583_REG(LDO9, LDOEN1, 1, LDODIS1, 1, 0x7F, 900, 3400, 25000, 133),97};98 99static int rc5t583_regulator_probe(struct platform_device *pdev)100{101 struct rc5t583 *rc5t583 = dev_get_drvdata(pdev->dev.parent);102 struct rc5t583_platform_data *pdata = dev_get_platdata(rc5t583->dev);103 struct regulator_config config = { };104 struct regulator_dev *rdev;105 struct rc5t583_regulator_info *ri;106 int ret;107 int id;108 109 if (!pdata) {110 dev_err(&pdev->dev, "No platform data, exiting...\n");111 return -ENODEV;112 }113 114 for (id = 0; id < RC5T583_REGULATOR_MAX; ++id) {115 ri = &rc5t583_reg_info[id];116 117 if (ri->deepsleep_id == RC5T583_DS_NONE)118 goto skip_ext_pwr_config;119 120 ret = rc5t583_ext_power_req_config(rc5t583->dev,121 ri->deepsleep_id,122 pdata->regulator_ext_pwr_control[id],123 pdata->regulator_deepsleep_slot[id]);124 /*125 * Configuring external control is not a major issue,126 * just give warning.127 */128 if (ret < 0)129 dev_warn(&pdev->dev,130 "Failed to configure ext control %d\n", id);131 132skip_ext_pwr_config:133 config.dev = &pdev->dev;134 config.init_data = pdata->reg_init_data[id];135 config.driver_data = ri;136 config.regmap = rc5t583->regmap;137 138 rdev = devm_regulator_register(&pdev->dev, &ri->desc, &config);139 if (IS_ERR(rdev)) {140 dev_err(&pdev->dev, "Failed to register regulator %s\n",141 ri->desc.name);142 return PTR_ERR(rdev);143 }144 }145 return 0;146}147 148static struct platform_driver rc5t583_regulator_driver = {149 .driver = {150 .name = "rc5t583-regulator",151 .probe_type = PROBE_PREFER_ASYNCHRONOUS,152 },153 .probe = rc5t583_regulator_probe,154};155 156static int __init rc5t583_regulator_init(void)157{158 return platform_driver_register(&rc5t583_regulator_driver);159}160subsys_initcall(rc5t583_regulator_init);161 162static void __exit rc5t583_regulator_exit(void)163{164 platform_driver_unregister(&rc5t583_regulator_driver);165}166module_exit(rc5t583_regulator_exit);167 168MODULE_AUTHOR("Laxman Dewangan <ldewangan@nvidia.com>");169MODULE_DESCRIPTION("RC5T583 regulator driver");170MODULE_ALIAS("platform:rc5t583-regulator");171MODULE_LICENSE("GPL v2");172