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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * Driver for TPS65218 Integrated power management chipsets4 *5 * Copyright (C) 2014 Texas Instruments Incorporated - https://www.ti.com/6 */7 8#include <linux/kernel.h>9#include <linux/device.h>10#include <linux/module.h>11#include <linux/platform_device.h>12#include <linux/init.h>13#include <linux/i2c.h>14#include <linux/slab.h>15#include <linux/regmap.h>16#include <linux/err.h>17#include <linux/of.h>18#include <linux/irq.h>19#include <linux/interrupt.h>20#include <linux/mutex.h>21 22#include <linux/mfd/core.h>23#include <linux/mfd/tps65218.h>24 25#define TPS65218_PASSWORD_REGS_UNLOCK 0x7D26 27static const struct mfd_cell tps65218_cells[] = {28 {29 .name = "tps65218-pwrbutton",30 .of_compatible = "ti,tps65218-pwrbutton",31 },32 {33 .name = "tps65218-gpio",34 .of_compatible = "ti,tps65218-gpio",35 },36 { .name = "tps65218-regulator", },37};38 39/**40 * tps65218_reg_write: Write a single tps65218 register.41 *42 * @tps: Device to write to.43 * @reg: Register to write to.44 * @val: Value to write.45 * @level: Password protected level46 */47int tps65218_reg_write(struct tps65218 *tps, unsigned int reg,48 unsigned int val, unsigned int level)49{50 int ret;51 unsigned int xor_reg_val;52 53 switch (level) {54 case TPS65218_PROTECT_NONE:55 return regmap_write(tps->regmap, reg, val);56 case TPS65218_PROTECT_L1:57 xor_reg_val = reg ^ TPS65218_PASSWORD_REGS_UNLOCK;58 ret = regmap_write(tps->regmap, TPS65218_REG_PASSWORD,59 xor_reg_val);60 if (ret < 0)61 return ret;62 63 return regmap_write(tps->regmap, reg, val);64 default:65 return -EINVAL;66 }67}68EXPORT_SYMBOL_GPL(tps65218_reg_write);69 70/**71 * tps65218_update_bits: Modify bits w.r.t mask, val and level.72 *73 * @tps: Device to write to.74 * @reg: Register to read-write to.75 * @mask: Mask.76 * @val: Value to write.77 * @level: Password protected level78 */79static int tps65218_update_bits(struct tps65218 *tps, unsigned int reg,80 unsigned int mask, unsigned int val, unsigned int level)81{82 int ret;83 unsigned int data;84 85 ret = regmap_read(tps->regmap, reg, &data);86 if (ret) {87 dev_err(tps->dev, "Read from reg 0x%x failed\n", reg);88 return ret;89 }90 91 data &= ~mask;92 data |= val & mask;93 94 mutex_lock(&tps->tps_lock);95 ret = tps65218_reg_write(tps, reg, data, level);96 if (ret)97 dev_err(tps->dev, "Write for reg 0x%x failed\n", reg);98 mutex_unlock(&tps->tps_lock);99 100 return ret;101}102 103int tps65218_set_bits(struct tps65218 *tps, unsigned int reg,104 unsigned int mask, unsigned int val, unsigned int level)105{106 return tps65218_update_bits(tps, reg, mask, val, level);107}108EXPORT_SYMBOL_GPL(tps65218_set_bits);109 110int tps65218_clear_bits(struct tps65218 *tps, unsigned int reg,111 unsigned int mask, unsigned int level)112{113 return tps65218_update_bits(tps, reg, mask, 0, level);114}115EXPORT_SYMBOL_GPL(tps65218_clear_bits);116 117static const struct regmap_range tps65218_yes_ranges[] = {118 regmap_reg_range(TPS65218_REG_INT1, TPS65218_REG_INT2),119 regmap_reg_range(TPS65218_REG_STATUS, TPS65218_REG_STATUS),120};121 122static const struct regmap_access_table tps65218_volatile_table = {123 .yes_ranges = tps65218_yes_ranges,124 .n_yes_ranges = ARRAY_SIZE(tps65218_yes_ranges),125};126 127static const struct regmap_config tps65218_regmap_config = {128 .reg_bits = 8,129 .val_bits = 8,130 .cache_type = REGCACHE_MAPLE,131 .volatile_table = &tps65218_volatile_table,132};133 134static const struct regmap_irq tps65218_irqs[] = {135 /* INT1 IRQs */136 [TPS65218_PRGC_IRQ] = {137 .mask = TPS65218_INT1_PRGC,138 },139 [TPS65218_CC_AQC_IRQ] = {140 .mask = TPS65218_INT1_CC_AQC,141 },142 [TPS65218_HOT_IRQ] = {143 .mask = TPS65218_INT1_HOT,144 },145 [TPS65218_PB_IRQ] = {146 .mask = TPS65218_INT1_PB,147 },148 [TPS65218_AC_IRQ] = {149 .mask = TPS65218_INT1_AC,150 },151 [TPS65218_VPRG_IRQ] = {152 .mask = TPS65218_INT1_VPRG,153 },154 [TPS65218_INVALID1_IRQ] = {155 },156 [TPS65218_INVALID2_IRQ] = {157 },158 /* INT2 IRQs*/159 [TPS65218_LS1_I_IRQ] = {160 .mask = TPS65218_INT2_LS1_I,161 .reg_offset = 1,162 },163 [TPS65218_LS2_I_IRQ] = {164 .mask = TPS65218_INT2_LS2_I,165 .reg_offset = 1,166 },167 [TPS65218_LS3_I_IRQ] = {168 .mask = TPS65218_INT2_LS3_I,169 .reg_offset = 1,170 },171 [TPS65218_LS1_F_IRQ] = {172 .mask = TPS65218_INT2_LS1_F,173 .reg_offset = 1,174 },175 [TPS65218_LS2_F_IRQ] = {176 .mask = TPS65218_INT2_LS2_F,177 .reg_offset = 1,178 },179 [TPS65218_LS3_F_IRQ] = {180 .mask = TPS65218_INT2_LS3_F,181 .reg_offset = 1,182 },183 [TPS65218_INVALID3_IRQ] = {184 },185 [TPS65218_INVALID4_IRQ] = {186 },187};188 189static const struct regmap_irq_chip tps65218_irq_chip = {190 .name = "tps65218",191 .irqs = tps65218_irqs,192 .num_irqs = ARRAY_SIZE(tps65218_irqs),193 194 .num_regs = 2,195 .mask_base = TPS65218_REG_INT_MASK1,196 .status_base = TPS65218_REG_INT1,197};198 199static const struct of_device_id of_tps65218_match_table[] = {200 { .compatible = "ti,tps65218", },201 {}202};203MODULE_DEVICE_TABLE(of, of_tps65218_match_table);204 205static int tps65218_voltage_set_strict(struct tps65218 *tps)206{207 u32 strict;208 209 if (of_property_read_u32(tps->dev->of_node,210 "ti,strict-supply-voltage-supervision",211 &strict))212 return 0;213 214 if (strict != 0 && strict != 1) {215 dev_err(tps->dev,216 "Invalid ti,strict-supply-voltage-supervision value\n");217 return -EINVAL;218 }219 220 tps65218_update_bits(tps, TPS65218_REG_CONFIG1,221 TPS65218_CONFIG1_STRICT,222 strict ? TPS65218_CONFIG1_STRICT : 0,223 TPS65218_PROTECT_L1);224 return 0;225}226 227static int tps65218_voltage_set_uv_hyst(struct tps65218 *tps)228{229 u32 hyst;230 231 if (of_property_read_u32(tps->dev->of_node,232 "ti,under-voltage-hyst-microvolt", &hyst))233 return 0;234 235 if (hyst != 400000 && hyst != 200000) {236 dev_err(tps->dev,237 "Invalid ti,under-voltage-hyst-microvolt value\n");238 return -EINVAL;239 }240 241 tps65218_update_bits(tps, TPS65218_REG_CONFIG2,242 TPS65218_CONFIG2_UVLOHYS,243 hyst == 400000 ? TPS65218_CONFIG2_UVLOHYS : 0,244 TPS65218_PROTECT_L1);245 return 0;246}247 248static int tps65218_voltage_set_uvlo(struct tps65218 *tps)249{250 u32 uvlo;251 int uvloval;252 253 if (of_property_read_u32(tps->dev->of_node,254 "ti,under-voltage-limit-microvolt", &uvlo))255 return 0;256 257 switch (uvlo) {258 case 2750000:259 uvloval = TPS65218_CONFIG1_UVLO_2750000;260 break;261 case 2950000:262 uvloval = TPS65218_CONFIG1_UVLO_2950000;263 break;264 case 3250000:265 uvloval = TPS65218_CONFIG1_UVLO_3250000;266 break;267 case 3350000:268 uvloval = TPS65218_CONFIG1_UVLO_3350000;269 break;270 default:271 dev_err(tps->dev,272 "Invalid ti,under-voltage-limit-microvolt value\n");273 return -EINVAL;274 }275 276 tps65218_update_bits(tps, TPS65218_REG_CONFIG1,277 TPS65218_CONFIG1_UVLO_MASK, uvloval,278 TPS65218_PROTECT_L1);279 return 0;280}281 282static int tps65218_probe(struct i2c_client *client)283{284 struct tps65218 *tps;285 int ret;286 unsigned int chipid;287 288 tps = devm_kzalloc(&client->dev, sizeof(*tps), GFP_KERNEL);289 if (!tps)290 return -ENOMEM;291 292 i2c_set_clientdata(client, tps);293 tps->dev = &client->dev;294 tps->irq = client->irq;295 tps->regmap = devm_regmap_init_i2c(client, &tps65218_regmap_config);296 if (IS_ERR(tps->regmap)) {297 ret = PTR_ERR(tps->regmap);298 dev_err(tps->dev, "Failed to allocate register map: %d\n",299 ret);300 return ret;301 }302 303 mutex_init(&tps->tps_lock);304 305 ret = devm_regmap_add_irq_chip(&client->dev, tps->regmap, tps->irq,306 IRQF_ONESHOT, 0, &tps65218_irq_chip,307 &tps->irq_data);308 if (ret < 0)309 return ret;310 311 ret = regmap_read(tps->regmap, TPS65218_REG_CHIPID, &chipid);312 if (ret) {313 dev_err(tps->dev, "Failed to read chipid: %d\n", ret);314 return ret;315 }316 317 tps->rev = chipid & TPS65218_CHIPID_REV_MASK;318 319 ret = tps65218_voltage_set_strict(tps);320 if (ret)321 return ret;322 323 ret = tps65218_voltage_set_uvlo(tps);324 if (ret)325 return ret;326 327 ret = tps65218_voltage_set_uv_hyst(tps);328 if (ret)329 return ret;330 331 ret = mfd_add_devices(tps->dev, PLATFORM_DEVID_AUTO, tps65218_cells,332 ARRAY_SIZE(tps65218_cells), NULL, 0,333 regmap_irq_get_domain(tps->irq_data));334 335 return ret;336}337 338static const struct i2c_device_id tps65218_id_table[] = {339 { "tps65218", TPS65218 },340 { },341};342MODULE_DEVICE_TABLE(i2c, tps65218_id_table);343 344static struct i2c_driver tps65218_driver = {345 .driver = {346 .name = "tps65218",347 .of_match_table = of_tps65218_match_table,348 },349 .probe = tps65218_probe,350 .id_table = tps65218_id_table,351};352 353module_i2c_driver(tps65218_driver);354 355MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>");356MODULE_DESCRIPTION("TPS65218 chip family multi-function driver");357MODULE_LICENSE("GPL v2");358