376 lines · c
1// SPDX-License-Identifier: GPL-2.0+2 3#include <linux/bitops.h>4#include <linux/i2c.h>5#include <linux/kernel.h>6#include <linux/module.h>7#include <linux/of.h>8#include <linux/regmap.h>9#include <linux/regulator/driver.h>10 11enum {12 RTQ2134_IDX_BUCK1 = 0,13 RTQ2134_IDX_BUCK2,14 RTQ2134_IDX_BUCK3,15 RTQ2134_IDX_MAX16};17 18#define RTQ2134_AUTO_MODE 019#define RTQ2134_FCCM_MODE 120 21#define RTQ2134_BUCK_DVS0_CTRL 022#define RTQ2134_BUCK_VSEL_CTRL 223 24#define RTQ2134_REG_IO_CHIPNAME 0x0125#define RTQ2134_REG_FLT_RECORDTEMP 0x1326#define RTQ2134_REG_FLT_RECORDBUCK(_id) (0x14 + (_id))27#define RTQ2134_REG_FLT_BUCKCTRL(_id) (0x37 + (_id))28#define RTQ2134_REG_BUCK1_CFG0 0x4229#define RTQ2134_REG_BUCK1_DVS0CFG1 0x4830#define RTQ2134_REG_BUCK1_DVS0CFG0 0x4931#define RTQ2134_REG_BUCK1_DVS1CFG1 0x4A32#define RTQ2134_REG_BUCK1_DVS1CFG0 0x4B33#define RTQ2134_REG_BUCK1_DVSCFG 0x5234#define RTQ2134_REG_BUCK1_RSPCFG 0x5435#define RTQ2134_REG_BUCK2_CFG0 0x5F36#define RTQ2134_REG_BUCK2_DVS0CFG1 0x6237#define RTQ2134_REG_BUCK2_DVS0CFG0 0x6338#define RTQ2134_REG_BUCK2_DVS1CFG1 0x6439#define RTQ2134_REG_BUCK2_DVS1CFG0 0x6540#define RTQ2134_REG_BUCK2_DVSCFG 0x6C41#define RTQ2134_REG_BUCK2_RSPCFG 0x6E42#define RTQ2134_REG_BUCK3_CFG0 0x7943#define RTQ2134_REG_BUCK3_DVS0CFG1 0x7C44#define RTQ2134_REG_BUCK3_DVS0CFG0 0x7D45#define RTQ2134_REG_BUCK3_DVS1CFG1 0x7E46#define RTQ2134_REG_BUCK3_DVS1CFG0 0x7F47#define RTQ2134_REG_BUCK3_DVSCFG 0x8648#define RTQ2134_REG_BUCK3_RSPCFG 0x8849#define RTQ2134_REG_BUCK3_SLEWCTRL 0x8950 51#define RTQ2134_VOUT_MAXNUM 25652#define RTQ2134_VOUT_MASK 0xFF53#define RTQ2134_VOUTEN_MASK BIT(0)54#define RTQ2134_ACTDISCHG_MASK BIT(0)55#define RTQ2134_RSPUP_MASK GENMASK(6, 4)56#define RTQ2134_FCCM_MASK BIT(5)57#define RTQ2134_UVHICCUP_MASK BIT(3)58#define RTQ2134_BUCKDVS_CTRL_MASK GENMASK(1, 0)59#define RTQ2134_CHIPOT_MASK BIT(2)60#define RTQ2134_BUCKOV_MASK BIT(5)61#define RTQ2134_BUCKUV_MASK BIT(4)62 63struct rtq2134_regulator_desc {64 struct regulator_desc desc;65 /* Extension for proprietary register and mask */66 unsigned int mode_reg;67 unsigned int mode_mask;68 unsigned int suspend_enable_reg;69 unsigned int suspend_enable_mask;70 unsigned int suspend_vsel_reg;71 unsigned int suspend_vsel_mask;72 unsigned int suspend_mode_reg;73 unsigned int suspend_mode_mask;74 unsigned int dvs_ctrl_reg;75};76 77static int rtq2134_buck_set_mode(struct regulator_dev *rdev, unsigned int mode)78{79 struct rtq2134_regulator_desc *desc =80 (struct rtq2134_regulator_desc *)rdev->desc;81 unsigned int val;82 83 if (mode == REGULATOR_MODE_NORMAL)84 val = RTQ2134_AUTO_MODE;85 else if (mode == REGULATOR_MODE_FAST)86 val = RTQ2134_FCCM_MODE;87 else88 return -EINVAL;89 90 val <<= ffs(desc->mode_mask) - 1;91 return regmap_update_bits(rdev->regmap, desc->mode_reg, desc->mode_mask,92 val);93}94 95static unsigned int rtq2134_buck_get_mode(struct regulator_dev *rdev)96{97 struct rtq2134_regulator_desc *desc =98 (struct rtq2134_regulator_desc *)rdev->desc;99 unsigned int mode;100 int ret;101 102 ret = regmap_read(rdev->regmap, desc->mode_reg, &mode);103 if (ret)104 return ret;105 106 if (mode & desc->mode_mask)107 return REGULATOR_MODE_FAST;108 return REGULATOR_MODE_NORMAL;109}110 111static int rtq2134_buck_set_suspend_voltage(struct regulator_dev *rdev, int uV)112{113 struct rtq2134_regulator_desc *desc =114 (struct rtq2134_regulator_desc *)rdev->desc;115 int sel;116 117 sel = regulator_map_voltage_linear_range(rdev, uV, uV);118 if (sel < 0)119 return sel;120 121 sel <<= ffs(desc->suspend_vsel_mask) - 1;122 123 return regmap_update_bits(rdev->regmap, desc->suspend_vsel_reg,124 desc->suspend_vsel_mask, sel);125}126 127static int rtq2134_buck_set_suspend_enable(struct regulator_dev *rdev)128{129 struct rtq2134_regulator_desc *desc =130 (struct rtq2134_regulator_desc *)rdev->desc;131 unsigned int val = desc->suspend_enable_mask;132 133 return regmap_update_bits(rdev->regmap, desc->suspend_enable_reg,134 desc->suspend_enable_mask, val);135}136 137static int rtq2134_buck_set_suspend_disable(struct regulator_dev *rdev)138{139 struct rtq2134_regulator_desc *desc =140 (struct rtq2134_regulator_desc *)rdev->desc;141 142 return regmap_update_bits(rdev->regmap, desc->suspend_enable_reg,143 desc->suspend_enable_mask, 0);144}145 146static int rtq2134_buck_set_suspend_mode(struct regulator_dev *rdev,147 unsigned int mode)148{149 struct rtq2134_regulator_desc *desc =150 (struct rtq2134_regulator_desc *)rdev->desc;151 unsigned int val;152 153 if (mode == REGULATOR_MODE_NORMAL)154 val = RTQ2134_AUTO_MODE;155 else if (mode == REGULATOR_MODE_FAST)156 val = RTQ2134_FCCM_MODE;157 else158 return -EINVAL;159 160 val <<= ffs(desc->suspend_mode_mask) - 1;161 return regmap_update_bits(rdev->regmap, desc->suspend_mode_reg,162 desc->suspend_mode_mask, val);163}164 165static int rtq2134_buck_get_error_flags(struct regulator_dev *rdev,166 unsigned int *flags)167{168 int rid = rdev_get_id(rdev);169 unsigned int chip_error, buck_error, events = 0;170 int ret;171 172 ret = regmap_read(rdev->regmap, RTQ2134_REG_FLT_RECORDTEMP,173 &chip_error);174 if (ret) {175 dev_err(&rdev->dev, "Failed to get chip error flag\n");176 return ret;177 }178 179 ret = regmap_read(rdev->regmap, RTQ2134_REG_FLT_RECORDBUCK(rid),180 &buck_error);181 if (ret) {182 dev_err(&rdev->dev, "Failed to get buck error flag\n");183 return ret;184 }185 186 if (chip_error & RTQ2134_CHIPOT_MASK)187 events |= REGULATOR_ERROR_OVER_TEMP;188 189 if (buck_error & RTQ2134_BUCKUV_MASK)190 events |= REGULATOR_ERROR_UNDER_VOLTAGE;191 192 if (buck_error & RTQ2134_BUCKOV_MASK)193 events |= REGULATOR_ERROR_REGULATION_OUT;194 195 *flags = events;196 return 0;197}198 199static const struct regulator_ops rtq2134_buck_ops = {200 .list_voltage = regulator_list_voltage_linear_range,201 .set_voltage_sel = regulator_set_voltage_sel_regmap,202 .get_voltage_sel = regulator_get_voltage_sel_regmap,203 .enable = regulator_enable_regmap,204 .disable = regulator_disable_regmap,205 .is_enabled = regulator_is_enabled_regmap,206 .set_active_discharge = regulator_set_active_discharge_regmap,207 .set_ramp_delay = regulator_set_ramp_delay_regmap,208 .set_mode = rtq2134_buck_set_mode,209 .get_mode = rtq2134_buck_get_mode,210 .set_suspend_voltage = rtq2134_buck_set_suspend_voltage,211 .set_suspend_enable = rtq2134_buck_set_suspend_enable,212 .set_suspend_disable = rtq2134_buck_set_suspend_disable,213 .set_suspend_mode = rtq2134_buck_set_suspend_mode,214 .get_error_flags = rtq2134_buck_get_error_flags,215};216 217static const struct linear_range rtq2134_buck_vout_ranges[] = {218 REGULATOR_LINEAR_RANGE(300000, 0, 200, 5000),219 REGULATOR_LINEAR_RANGE(1310000, 201, 255, 10000)220};221 222static unsigned int rtq2134_buck_of_map_mode(unsigned int mode)223{224 switch (mode) {225 case RTQ2134_AUTO_MODE:226 return REGULATOR_MODE_NORMAL;227 case RTQ2134_FCCM_MODE:228 return REGULATOR_MODE_FAST;229 }230 231 return REGULATOR_MODE_INVALID;232}233 234static int rtq2134_buck_of_parse_cb(struct device_node *np,235 const struct regulator_desc *desc,236 struct regulator_config *cfg)237{238 struct rtq2134_regulator_desc *rdesc =239 (struct rtq2134_regulator_desc *)desc;240 int rid = desc->id;241 bool uv_shutdown, vsel_dvs;242 unsigned int val;243 int ret;244 245 vsel_dvs = of_property_read_bool(np, "richtek,use-vsel-dvs");246 if (vsel_dvs)247 val = RTQ2134_BUCK_VSEL_CTRL;248 else249 val = RTQ2134_BUCK_DVS0_CTRL;250 251 ret = regmap_update_bits(cfg->regmap, rdesc->dvs_ctrl_reg,252 RTQ2134_BUCKDVS_CTRL_MASK, val);253 if (ret)254 return ret;255 256 uv_shutdown = of_property_read_bool(np, "richtek,uv-shutdown");257 if (uv_shutdown)258 val = 0;259 else260 val = RTQ2134_UVHICCUP_MASK;261 262 return regmap_update_bits(cfg->regmap, RTQ2134_REG_FLT_BUCKCTRL(rid),263 RTQ2134_UVHICCUP_MASK, val);264}265 266static const unsigned int rtq2134_buck_ramp_delay_table[] = {267 0, 16000, 0, 8000, 4000, 2000, 1000, 500268};269 270#define RTQ2134_BUCK_DESC(_id) { \271 .desc = { \272 .name = "rtq2134_buck" #_id, \273 .of_match = of_match_ptr("buck" #_id), \274 .regulators_node = of_match_ptr("regulators"), \275 .id = RTQ2134_IDX_BUCK##_id, \276 .type = REGULATOR_VOLTAGE, \277 .owner = THIS_MODULE, \278 .ops = &rtq2134_buck_ops, \279 .n_voltages = RTQ2134_VOUT_MAXNUM, \280 .linear_ranges = rtq2134_buck_vout_ranges, \281 .n_linear_ranges = ARRAY_SIZE(rtq2134_buck_vout_ranges), \282 .vsel_reg = RTQ2134_REG_BUCK##_id##_DVS0CFG1, \283 .vsel_mask = RTQ2134_VOUT_MASK, \284 .enable_reg = RTQ2134_REG_BUCK##_id##_DVS0CFG0, \285 .enable_mask = RTQ2134_VOUTEN_MASK, \286 .active_discharge_reg = RTQ2134_REG_BUCK##_id##_CFG0, \287 .active_discharge_mask = RTQ2134_ACTDISCHG_MASK, \288 .active_discharge_on = RTQ2134_ACTDISCHG_MASK, \289 .ramp_reg = RTQ2134_REG_BUCK##_id##_RSPCFG, \290 .ramp_mask = RTQ2134_RSPUP_MASK, \291 .ramp_delay_table = rtq2134_buck_ramp_delay_table, \292 .n_ramp_values = ARRAY_SIZE(rtq2134_buck_ramp_delay_table), \293 .of_map_mode = rtq2134_buck_of_map_mode, \294 .of_parse_cb = rtq2134_buck_of_parse_cb, \295 }, \296 .mode_reg = RTQ2134_REG_BUCK##_id##_DVS0CFG0, \297 .mode_mask = RTQ2134_FCCM_MASK, \298 .suspend_mode_reg = RTQ2134_REG_BUCK##_id##_DVS1CFG0, \299 .suspend_mode_mask = RTQ2134_FCCM_MASK, \300 .suspend_enable_reg = RTQ2134_REG_BUCK##_id##_DVS1CFG0, \301 .suspend_enable_mask = RTQ2134_VOUTEN_MASK, \302 .suspend_vsel_reg = RTQ2134_REG_BUCK##_id##_DVS1CFG1, \303 .suspend_vsel_mask = RTQ2134_VOUT_MASK, \304 .dvs_ctrl_reg = RTQ2134_REG_BUCK##_id##_DVSCFG, \305}306 307static const struct rtq2134_regulator_desc rtq2134_regulator_descs[] = {308 RTQ2134_BUCK_DESC(1),309 RTQ2134_BUCK_DESC(2),310 RTQ2134_BUCK_DESC(3)311};312 313static bool rtq2134_is_accissible_reg(struct device *dev, unsigned int reg)314{315 if (reg >= RTQ2134_REG_IO_CHIPNAME && reg <= RTQ2134_REG_BUCK3_SLEWCTRL)316 return true;317 return false;318}319 320static const struct regmap_config rtq2134_regmap_config = {321 .reg_bits = 8,322 .val_bits = 8,323 .max_register = RTQ2134_REG_BUCK3_SLEWCTRL,324 325 .readable_reg = rtq2134_is_accissible_reg,326 .writeable_reg = rtq2134_is_accissible_reg,327};328 329static int rtq2134_probe(struct i2c_client *i2c)330{331 struct regmap *regmap;332 struct regulator_dev *rdev;333 struct regulator_config regulator_cfg = {};334 int i;335 336 regmap = devm_regmap_init_i2c(i2c, &rtq2134_regmap_config);337 if (IS_ERR(regmap)) {338 dev_err(&i2c->dev, "Failed to allocate regmap\n");339 return PTR_ERR(regmap);340 }341 342 regulator_cfg.dev = &i2c->dev;343 regulator_cfg.regmap = regmap;344 for (i = 0; i < ARRAY_SIZE(rtq2134_regulator_descs); i++) {345 rdev = devm_regulator_register(&i2c->dev,346 &rtq2134_regulator_descs[i].desc,347 ®ulator_cfg);348 if (IS_ERR(rdev)) {349 dev_err(&i2c->dev, "Failed to init %d regulator\n", i);350 return PTR_ERR(rdev);351 }352 }353 354 return 0;355}356 357static const struct of_device_id __maybe_unused rtq2134_device_tables[] = {358 { .compatible = "richtek,rtq2134", },359 {}360};361MODULE_DEVICE_TABLE(of, rtq2134_device_tables);362 363static struct i2c_driver rtq2134_driver = {364 .driver = {365 .name = "rtq2134",366 .probe_type = PROBE_PREFER_ASYNCHRONOUS,367 .of_match_table = rtq2134_device_tables,368 },369 .probe = rtq2134_probe,370};371module_i2c_driver(rtq2134_driver);372 373MODULE_AUTHOR("ChiYuan Huang <cy_huang@richtek.com>");374MODULE_DESCRIPTION("Richtek RTQ2134 Regulator Driver");375MODULE_LICENSE("GPL v2");376