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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * Core driver for TI TPS65090 PMIC family4 *5 * Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved.6 *7 * Author: Venu Byravarasu <vbyravarasu@nvidia.com>8 */9 10#include <linux/interrupt.h>11#include <linux/irq.h>12#include <linux/kernel.h>13#include <linux/init.h>14#include <linux/mutex.h>15#include <linux/slab.h>16#include <linux/i2c.h>17#include <linux/mfd/core.h>18#include <linux/mfd/tps65090.h>19#include <linux/of.h>20#include <linux/err.h>21 22#define NUM_INT_REG 223 24#define TPS65090_INT1_MASK_VAC_STATUS_CHANGE 125#define TPS65090_INT1_MASK_VSYS_STATUS_CHANGE 226#define TPS65090_INT1_MASK_BAT_STATUS_CHANGE 327#define TPS65090_INT1_MASK_CHARGING_STATUS_CHANGE 428#define TPS65090_INT1_MASK_CHARGING_COMPLETE 529#define TPS65090_INT1_MASK_OVERLOAD_DCDC1 630#define TPS65090_INT1_MASK_OVERLOAD_DCDC2 731#define TPS65090_INT2_MASK_OVERLOAD_DCDC3 032#define TPS65090_INT2_MASK_OVERLOAD_FET1 133#define TPS65090_INT2_MASK_OVERLOAD_FET2 234#define TPS65090_INT2_MASK_OVERLOAD_FET3 335#define TPS65090_INT2_MASK_OVERLOAD_FET4 436#define TPS65090_INT2_MASK_OVERLOAD_FET5 537#define TPS65090_INT2_MASK_OVERLOAD_FET6 638#define TPS65090_INT2_MASK_OVERLOAD_FET7 739 40static const struct resource charger_resources[] = {41 {42 .start = TPS65090_IRQ_VAC_STATUS_CHANGE,43 .end = TPS65090_IRQ_VAC_STATUS_CHANGE,44 .flags = IORESOURCE_IRQ,45 }46};47 48enum tps65090_cells {49 PMIC = 0,50 CHARGER = 1,51};52 53static struct mfd_cell tps65090s[] = {54 [PMIC] = {55 .name = "tps65090-pmic",56 },57 [CHARGER] = {58 .name = "tps65090-charger",59 .num_resources = ARRAY_SIZE(charger_resources),60 .resources = &charger_resources[0],61 .of_compatible = "ti,tps65090-charger",62 },63};64 65static const struct regmap_irq tps65090_irqs[] = {66 /* INT1 IRQs*/67 [TPS65090_IRQ_VAC_STATUS_CHANGE] = {68 .mask = TPS65090_INT1_MASK_VAC_STATUS_CHANGE,69 },70 [TPS65090_IRQ_VSYS_STATUS_CHANGE] = {71 .mask = TPS65090_INT1_MASK_VSYS_STATUS_CHANGE,72 },73 [TPS65090_IRQ_BAT_STATUS_CHANGE] = {74 .mask = TPS65090_INT1_MASK_BAT_STATUS_CHANGE,75 },76 [TPS65090_IRQ_CHARGING_STATUS_CHANGE] = {77 .mask = TPS65090_INT1_MASK_CHARGING_STATUS_CHANGE,78 },79 [TPS65090_IRQ_CHARGING_COMPLETE] = {80 .mask = TPS65090_INT1_MASK_CHARGING_COMPLETE,81 },82 [TPS65090_IRQ_OVERLOAD_DCDC1] = {83 .mask = TPS65090_INT1_MASK_OVERLOAD_DCDC1,84 },85 [TPS65090_IRQ_OVERLOAD_DCDC2] = {86 .mask = TPS65090_INT1_MASK_OVERLOAD_DCDC2,87 },88 /* INT2 IRQs*/89 [TPS65090_IRQ_OVERLOAD_DCDC3] = {90 .reg_offset = 1,91 .mask = TPS65090_INT2_MASK_OVERLOAD_DCDC3,92 },93 [TPS65090_IRQ_OVERLOAD_FET1] = {94 .reg_offset = 1,95 .mask = TPS65090_INT2_MASK_OVERLOAD_FET1,96 },97 [TPS65090_IRQ_OVERLOAD_FET2] = {98 .reg_offset = 1,99 .mask = TPS65090_INT2_MASK_OVERLOAD_FET2,100 },101 [TPS65090_IRQ_OVERLOAD_FET3] = {102 .reg_offset = 1,103 .mask = TPS65090_INT2_MASK_OVERLOAD_FET3,104 },105 [TPS65090_IRQ_OVERLOAD_FET4] = {106 .reg_offset = 1,107 .mask = TPS65090_INT2_MASK_OVERLOAD_FET4,108 },109 [TPS65090_IRQ_OVERLOAD_FET5] = {110 .reg_offset = 1,111 .mask = TPS65090_INT2_MASK_OVERLOAD_FET5,112 },113 [TPS65090_IRQ_OVERLOAD_FET6] = {114 .reg_offset = 1,115 .mask = TPS65090_INT2_MASK_OVERLOAD_FET6,116 },117 [TPS65090_IRQ_OVERLOAD_FET7] = {118 .reg_offset = 1,119 .mask = TPS65090_INT2_MASK_OVERLOAD_FET7,120 },121};122 123static const struct regmap_irq_chip tps65090_irq_chip = {124 .name = "tps65090",125 .irqs = tps65090_irqs,126 .num_irqs = ARRAY_SIZE(tps65090_irqs),127 .num_regs = NUM_INT_REG,128 .status_base = TPS65090_REG_INTR_STS,129 .unmask_base = TPS65090_REG_INTR_MASK,130};131 132static bool is_volatile_reg(struct device *dev, unsigned int reg)133{134 /* Nearly all registers have status bits mixed in, except a few */135 switch (reg) {136 case TPS65090_REG_INTR_MASK:137 case TPS65090_REG_INTR_MASK2:138 case TPS65090_REG_CG_CTRL0:139 case TPS65090_REG_CG_CTRL1:140 case TPS65090_REG_CG_CTRL2:141 case TPS65090_REG_CG_CTRL3:142 case TPS65090_REG_CG_CTRL4:143 case TPS65090_REG_CG_CTRL5:144 return false;145 }146 return true;147}148 149static const struct regmap_config tps65090_regmap_config = {150 .reg_bits = 8,151 .val_bits = 8,152 .max_register = TPS65090_MAX_REG,153 .num_reg_defaults_raw = TPS65090_NUM_REGS,154 .cache_type = REGCACHE_MAPLE,155 .volatile_reg = is_volatile_reg,156};157 158#ifdef CONFIG_OF159static const struct of_device_id tps65090_of_match[] = {160 { .compatible = "ti,tps65090",},161 {},162};163#endif164 165static int tps65090_i2c_probe(struct i2c_client *client)166{167 struct tps65090_platform_data *pdata = dev_get_platdata(&client->dev);168 int irq_base = 0;169 struct tps65090 *tps65090;170 int ret;171 172 if (!pdata && !client->dev.of_node) {173 dev_err(&client->dev,174 "tps65090 requires platform data or of_node\n");175 return -EINVAL;176 }177 178 if (pdata)179 irq_base = pdata->irq_base;180 181 tps65090 = devm_kzalloc(&client->dev, sizeof(*tps65090), GFP_KERNEL);182 if (!tps65090)183 return -ENOMEM;184 185 tps65090->dev = &client->dev;186 i2c_set_clientdata(client, tps65090);187 188 tps65090->rmap = devm_regmap_init_i2c(client, &tps65090_regmap_config);189 if (IS_ERR(tps65090->rmap)) {190 ret = PTR_ERR(tps65090->rmap);191 dev_err(&client->dev, "regmap_init failed with err: %d\n", ret);192 return ret;193 }194 195 if (client->irq) {196 ret = regmap_add_irq_chip(tps65090->rmap, client->irq,197 IRQF_ONESHOT | IRQF_TRIGGER_LOW, irq_base,198 &tps65090_irq_chip, &tps65090->irq_data);199 if (ret) {200 dev_err(&client->dev,201 "IRQ init failed with err: %d\n", ret);202 return ret;203 }204 } else {205 /* Don't tell children they have an IRQ that'll never fire */206 tps65090s[CHARGER].num_resources = 0;207 }208 209 ret = mfd_add_devices(tps65090->dev, -1, tps65090s,210 ARRAY_SIZE(tps65090s), NULL,211 0, regmap_irq_get_domain(tps65090->irq_data));212 if (ret) {213 dev_err(&client->dev, "add mfd devices failed with err: %d\n",214 ret);215 goto err_irq_exit;216 }217 218 return 0;219 220err_irq_exit:221 if (client->irq)222 regmap_del_irq_chip(client->irq, tps65090->irq_data);223 return ret;224}225 226 227static const struct i2c_device_id tps65090_id_table[] = {228 { "tps65090" },229 { }230};231 232static struct i2c_driver tps65090_driver = {233 .driver = {234 .name = "tps65090",235 .suppress_bind_attrs = true,236 .of_match_table = of_match_ptr(tps65090_of_match),237 },238 .probe = tps65090_i2c_probe,239 .id_table = tps65090_id_table,240};241 242static int __init tps65090_init(void)243{244 return i2c_add_driver(&tps65090_driver);245}246subsys_initcall(tps65090_init);247