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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * tps65217.c4 *5 * TPS65217 chip family multi-function driver6 *7 * Copyright (C) 2011 Texas Instruments Incorporated - https://www.ti.com/8 */9 10#include <linux/device.h>11#include <linux/err.h>12#include <linux/init.h>13#include <linux/interrupt.h>14#include <linux/i2c.h>15#include <linux/irq.h>16#include <linux/irqdomain.h>17#include <linux/kernel.h>18#include <linux/module.h>19#include <linux/of.h>20#include <linux/platform_device.h>21#include <linux/regmap.h>22#include <linux/slab.h>23 24#include <linux/mfd/core.h>25#include <linux/mfd/tps65217.h>26 27static const struct resource charger_resources[] = {28 DEFINE_RES_IRQ_NAMED(TPS65217_IRQ_AC, "AC"),29 DEFINE_RES_IRQ_NAMED(TPS65217_IRQ_USB, "USB"),30};31 32static const struct resource pb_resources[] = {33 DEFINE_RES_IRQ_NAMED(TPS65217_IRQ_PB, "PB"),34};35 36static void tps65217_irq_lock(struct irq_data *data)37{38 struct tps65217 *tps = irq_data_get_irq_chip_data(data);39 40 mutex_lock(&tps->irq_lock);41}42 43static void tps65217_irq_sync_unlock(struct irq_data *data)44{45 struct tps65217 *tps = irq_data_get_irq_chip_data(data);46 int ret;47 48 ret = tps65217_set_bits(tps, TPS65217_REG_INT, TPS65217_INT_MASK,49 tps->irq_mask, TPS65217_PROTECT_NONE);50 if (ret != 0)51 dev_err(tps->dev, "Failed to sync IRQ masks\n");52 53 mutex_unlock(&tps->irq_lock);54}55 56static void tps65217_irq_enable(struct irq_data *data)57{58 struct tps65217 *tps = irq_data_get_irq_chip_data(data);59 u8 mask = BIT(data->hwirq) << TPS65217_INT_SHIFT;60 61 tps->irq_mask &= ~mask;62}63 64static void tps65217_irq_disable(struct irq_data *data)65{66 struct tps65217 *tps = irq_data_get_irq_chip_data(data);67 u8 mask = BIT(data->hwirq) << TPS65217_INT_SHIFT;68 69 tps->irq_mask |= mask;70}71 72static struct irq_chip tps65217_irq_chip = {73 .name = "tps65217",74 .irq_bus_lock = tps65217_irq_lock,75 .irq_bus_sync_unlock = tps65217_irq_sync_unlock,76 .irq_enable = tps65217_irq_enable,77 .irq_disable = tps65217_irq_disable,78};79 80static struct mfd_cell tps65217s[] = {81 {82 .name = "tps65217-pmic",83 .of_compatible = "ti,tps65217-pmic",84 },85 {86 .name = "tps65217-bl",87 .of_compatible = "ti,tps65217-bl",88 },89 {90 .name = "tps65217-charger",91 .num_resources = ARRAY_SIZE(charger_resources),92 .resources = charger_resources,93 .of_compatible = "ti,tps65217-charger",94 },95 {96 .name = "tps65217-pwrbutton",97 .num_resources = ARRAY_SIZE(pb_resources),98 .resources = pb_resources,99 .of_compatible = "ti,tps65217-pwrbutton",100 },101};102 103static irqreturn_t tps65217_irq_thread(int irq, void *data)104{105 struct tps65217 *tps = data;106 unsigned int status;107 bool handled = false;108 int i;109 int ret;110 111 ret = tps65217_reg_read(tps, TPS65217_REG_INT, &status);112 if (ret < 0) {113 dev_err(tps->dev, "Failed to read IRQ status: %d\n",114 ret);115 return IRQ_NONE;116 }117 118 for (i = 0; i < TPS65217_NUM_IRQ; i++) {119 if (status & BIT(i)) {120 handle_nested_irq(irq_find_mapping(tps->irq_domain, i));121 handled = true;122 }123 }124 125 if (handled)126 return IRQ_HANDLED;127 128 return IRQ_NONE;129}130 131static int tps65217_irq_map(struct irq_domain *h, unsigned int virq,132 irq_hw_number_t hw)133{134 struct tps65217 *tps = h->host_data;135 136 irq_set_chip_data(virq, tps);137 irq_set_chip_and_handler(virq, &tps65217_irq_chip, handle_edge_irq);138 irq_set_nested_thread(virq, 1);139 irq_set_parent(virq, tps->irq);140 irq_set_noprobe(virq);141 142 return 0;143}144 145static const struct irq_domain_ops tps65217_irq_domain_ops = {146 .map = tps65217_irq_map,147};148 149static int tps65217_irq_init(struct tps65217 *tps, int irq)150{151 int ret;152 153 mutex_init(&tps->irq_lock);154 tps->irq = irq;155 156 /* Mask all interrupt sources */157 tps->irq_mask = TPS65217_INT_MASK;158 tps65217_set_bits(tps, TPS65217_REG_INT, TPS65217_INT_MASK,159 TPS65217_INT_MASK, TPS65217_PROTECT_NONE);160 161 tps->irq_domain = irq_domain_add_linear(tps->dev->of_node,162 TPS65217_NUM_IRQ, &tps65217_irq_domain_ops, tps);163 if (!tps->irq_domain) {164 dev_err(tps->dev, "Could not create IRQ domain\n");165 return -ENOMEM;166 }167 168 ret = devm_request_threaded_irq(tps->dev, irq, NULL,169 tps65217_irq_thread, IRQF_ONESHOT,170 "tps65217-irq", tps);171 if (ret) {172 dev_err(tps->dev, "Failed to request IRQ %d: %d\n",173 irq, ret);174 return ret;175 }176 177 enable_irq_wake(irq);178 179 return 0;180}181 182/**183 * tps65217_reg_read: Read a single tps65217 register.184 *185 * @tps: Device to read from.186 * @reg: Register to read.187 * @val: Contians the value188 */189int tps65217_reg_read(struct tps65217 *tps, unsigned int reg,190 unsigned int *val)191{192 return regmap_read(tps->regmap, reg, val);193}194EXPORT_SYMBOL_GPL(tps65217_reg_read);195 196/**197 * tps65217_reg_write: Write a single tps65217 register.198 *199 * @tps: Device to write to.200 * @reg: Register to write to.201 * @val: Value to write.202 * @level: Password protected level203 */204int tps65217_reg_write(struct tps65217 *tps, unsigned int reg,205 unsigned int val, unsigned int level)206{207 int ret;208 unsigned int xor_reg_val;209 210 switch (level) {211 case TPS65217_PROTECT_NONE:212 return regmap_write(tps->regmap, reg, val);213 case TPS65217_PROTECT_L1:214 xor_reg_val = reg ^ TPS65217_PASSWORD_REGS_UNLOCK;215 ret = regmap_write(tps->regmap, TPS65217_REG_PASSWORD,216 xor_reg_val);217 if (ret < 0)218 return ret;219 220 return regmap_write(tps->regmap, reg, val);221 case TPS65217_PROTECT_L2:222 xor_reg_val = reg ^ TPS65217_PASSWORD_REGS_UNLOCK;223 ret = regmap_write(tps->regmap, TPS65217_REG_PASSWORD,224 xor_reg_val);225 if (ret < 0)226 return ret;227 ret = regmap_write(tps->regmap, reg, val);228 if (ret < 0)229 return ret;230 ret = regmap_write(tps->regmap, TPS65217_REG_PASSWORD,231 xor_reg_val);232 if (ret < 0)233 return ret;234 return regmap_write(tps->regmap, reg, val);235 default:236 return -EINVAL;237 }238}239EXPORT_SYMBOL_GPL(tps65217_reg_write);240 241/**242 * tps65217_update_bits: Modify bits w.r.t mask, val and level.243 *244 * @tps: Device to write to.245 * @reg: Register to read-write to.246 * @mask: Mask.247 * @val: Value to write.248 * @level: Password protected level249 */250static int tps65217_update_bits(struct tps65217 *tps, unsigned int reg,251 unsigned int mask, unsigned int val, unsigned int level)252{253 int ret;254 unsigned int data;255 256 ret = tps65217_reg_read(tps, reg, &data);257 if (ret) {258 dev_err(tps->dev, "Read from reg 0x%x failed\n", reg);259 return ret;260 }261 262 data &= ~mask;263 data |= val & mask;264 265 ret = tps65217_reg_write(tps, reg, data, level);266 if (ret)267 dev_err(tps->dev, "Write for reg 0x%x failed\n", reg);268 269 return ret;270}271 272int tps65217_set_bits(struct tps65217 *tps, unsigned int reg,273 unsigned int mask, unsigned int val, unsigned int level)274{275 return tps65217_update_bits(tps, reg, mask, val, level);276}277EXPORT_SYMBOL_GPL(tps65217_set_bits);278 279int tps65217_clear_bits(struct tps65217 *tps, unsigned int reg,280 unsigned int mask, unsigned int level)281{282 return tps65217_update_bits(tps, reg, mask, 0, level);283}284EXPORT_SYMBOL_GPL(tps65217_clear_bits);285 286static bool tps65217_volatile_reg(struct device *dev, unsigned int reg)287{288 switch (reg) {289 case TPS65217_REG_INT:290 return true;291 default:292 return false;293 }294}295 296static const struct regmap_config tps65217_regmap_config = {297 .reg_bits = 8,298 .val_bits = 8,299 300 .max_register = TPS65217_REG_MAX,301 .volatile_reg = tps65217_volatile_reg,302};303 304static const struct of_device_id tps65217_of_match[] = {305 { .compatible = "ti,tps65217"},306 { /* sentinel */ },307};308MODULE_DEVICE_TABLE(of, tps65217_of_match);309 310static int tps65217_probe(struct i2c_client *client)311{312 struct tps65217 *tps;313 unsigned int version;314 bool status_off = false;315 int ret;316 317 status_off = of_property_read_bool(client->dev.of_node,318 "ti,pmic-shutdown-controller");319 320 tps = devm_kzalloc(&client->dev, sizeof(*tps), GFP_KERNEL);321 if (!tps)322 return -ENOMEM;323 324 i2c_set_clientdata(client, tps);325 tps->dev = &client->dev;326 327 tps->regmap = devm_regmap_init_i2c(client, &tps65217_regmap_config);328 if (IS_ERR(tps->regmap)) {329 ret = PTR_ERR(tps->regmap);330 dev_err(tps->dev, "Failed to allocate register map: %d\n",331 ret);332 return ret;333 }334 335 if (client->irq) {336 tps65217_irq_init(tps, client->irq);337 } else {338 int i;339 340 /* Don't tell children about IRQ resources which won't fire */341 for (i = 0; i < ARRAY_SIZE(tps65217s); i++)342 tps65217s[i].num_resources = 0;343 }344 345 ret = devm_mfd_add_devices(tps->dev, -1, tps65217s,346 ARRAY_SIZE(tps65217s), NULL, 0,347 tps->irq_domain);348 if (ret < 0) {349 dev_err(tps->dev, "mfd_add_devices failed: %d\n", ret);350 return ret;351 }352 353 ret = tps65217_reg_read(tps, TPS65217_REG_CHIPID, &version);354 if (ret < 0) {355 dev_err(tps->dev, "Failed to read revision register: %d\n",356 ret);357 return ret;358 }359 360 /* Set the PMIC to shutdown on PWR_EN toggle */361 if (status_off) {362 ret = tps65217_set_bits(tps, TPS65217_REG_STATUS,363 TPS65217_STATUS_OFF, TPS65217_STATUS_OFF,364 TPS65217_PROTECT_NONE);365 if (ret)366 dev_warn(tps->dev, "unable to set the status OFF\n");367 }368 369 dev_info(tps->dev, "TPS65217 ID %#x version 1.%d\n",370 (version & TPS65217_CHIPID_CHIP_MASK) >> 4,371 version & TPS65217_CHIPID_REV_MASK);372 373 return 0;374}375 376static void tps65217_remove(struct i2c_client *client)377{378 struct tps65217 *tps = i2c_get_clientdata(client);379 unsigned int virq;380 int i;381 382 for (i = 0; i < TPS65217_NUM_IRQ; i++) {383 virq = irq_find_mapping(tps->irq_domain, i);384 if (virq)385 irq_dispose_mapping(virq);386 }387 388 irq_domain_remove(tps->irq_domain);389 tps->irq_domain = NULL;390}391 392static const struct i2c_device_id tps65217_id_table[] = {393 {"tps65217", TPS65217},394 { /* sentinel */ }395};396MODULE_DEVICE_TABLE(i2c, tps65217_id_table);397 398static struct i2c_driver tps65217_driver = {399 .driver = {400 .name = "tps65217",401 .of_match_table = tps65217_of_match,402 },403 .id_table = tps65217_id_table,404 .probe = tps65217_probe,405 .remove = tps65217_remove,406};407 408static int __init tps65217_init(void)409{410 return i2c_add_driver(&tps65217_driver);411}412subsys_initcall(tps65217_init);413 414static void __exit tps65217_exit(void)415{416 i2c_del_driver(&tps65217_driver);417}418module_exit(tps65217_exit);419 420MODULE_AUTHOR("AnilKumar Ch <anilkumar@ti.com>");421MODULE_DESCRIPTION("TPS65217 chip family multi-function driver");422MODULE_LICENSE("GPL v2");423