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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * Analog Devices ADP5585 I/O expander, PWM controller and keypad controller4 *5 * Copyright 2022 NXP6 * Copyright 2024 Ideas on Board Oy7 */8 9#include <linux/array_size.h>10#include <linux/device.h>11#include <linux/err.h>12#include <linux/i2c.h>13#include <linux/mfd/adp5585.h>14#include <linux/mfd/core.h>15#include <linux/mod_devicetable.h>16#include <linux/module.h>17#include <linux/regmap.h>18#include <linux/types.h>19 20static const struct mfd_cell adp5585_devs[] = {21 { .name = "adp5585-gpio", },22 { .name = "adp5585-pwm", },23};24 25static const struct regmap_range adp5585_volatile_ranges[] = {26 regmap_reg_range(ADP5585_ID, ADP5585_GPI_STATUS_B),27};28 29static const struct regmap_access_table adp5585_volatile_regs = {30 .yes_ranges = adp5585_volatile_ranges,31 .n_yes_ranges = ARRAY_SIZE(adp5585_volatile_ranges),32};33 34/*35 * Chip variants differ in the default configuration of pull-up and pull-down36 * resistors, and therefore have different default register values:37 *38 * - The -00, -01 and -03 variants (collectively referred to as39 * ADP5585_REGMAP_00) have pull-up on all GPIO pins by default.40 * - The -02 variant has no default pull-up or pull-down resistors.41 * - The -04 variant has default pull-down resistors on all GPIO pins.42 */43 44static const u8 adp5585_regmap_defaults_00[ADP5585_MAX_REG + 1] = {45 /* 0x00 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,46 /* 0x08 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,47 /* 0x10 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,48 /* 0x18 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,49 /* 0x20 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,50 /* 0x28 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,51 /* 0x30 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,52 /* 0x38 */ 0x00, 0x00, 0x00, 0x00, 0x00,53};54 55static const u8 adp5585_regmap_defaults_02[ADP5585_MAX_REG + 1] = {56 /* 0x00 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,57 /* 0x08 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,58 /* 0x10 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xc3,59 /* 0x18 */ 0x03, 0x00, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00,60 /* 0x20 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,61 /* 0x28 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,62 /* 0x30 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,63 /* 0x38 */ 0x00, 0x00, 0x00, 0x00, 0x00,64};65 66static const u8 adp5585_regmap_defaults_04[ADP5585_MAX_REG + 1] = {67 /* 0x00 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,68 /* 0x08 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,69 /* 0x10 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x55,70 /* 0x18 */ 0x05, 0x55, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,71 /* 0x20 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,72 /* 0x28 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,73 /* 0x30 */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,74 /* 0x38 */ 0x00, 0x00, 0x00, 0x00, 0x00,75};76 77enum adp5585_regmap_type {78 ADP5585_REGMAP_00,79 ADP5585_REGMAP_02,80 ADP5585_REGMAP_04,81};82 83static const struct regmap_config adp5585_regmap_configs[] = {84 [ADP5585_REGMAP_00] = {85 .reg_bits = 8,86 .val_bits = 8,87 .max_register = ADP5585_MAX_REG,88 .volatile_table = &adp5585_volatile_regs,89 .cache_type = REGCACHE_MAPLE,90 .reg_defaults_raw = adp5585_regmap_defaults_00,91 .num_reg_defaults_raw = sizeof(adp5585_regmap_defaults_00),92 },93 [ADP5585_REGMAP_02] = {94 .reg_bits = 8,95 .val_bits = 8,96 .max_register = ADP5585_MAX_REG,97 .volatile_table = &adp5585_volatile_regs,98 .cache_type = REGCACHE_MAPLE,99 .reg_defaults_raw = adp5585_regmap_defaults_02,100 .num_reg_defaults_raw = sizeof(adp5585_regmap_defaults_02),101 },102 [ADP5585_REGMAP_04] = {103 .reg_bits = 8,104 .val_bits = 8,105 .max_register = ADP5585_MAX_REG,106 .volatile_table = &adp5585_volatile_regs,107 .cache_type = REGCACHE_MAPLE,108 .reg_defaults_raw = adp5585_regmap_defaults_04,109 .num_reg_defaults_raw = sizeof(adp5585_regmap_defaults_04),110 },111};112 113static int adp5585_i2c_probe(struct i2c_client *i2c)114{115 const struct regmap_config *regmap_config;116 struct adp5585_dev *adp5585;117 unsigned int id;118 int ret;119 120 adp5585 = devm_kzalloc(&i2c->dev, sizeof(*adp5585), GFP_KERNEL);121 if (!adp5585)122 return -ENOMEM;123 124 i2c_set_clientdata(i2c, adp5585);125 126 regmap_config = i2c_get_match_data(i2c);127 adp5585->regmap = devm_regmap_init_i2c(i2c, regmap_config);128 if (IS_ERR(adp5585->regmap))129 return dev_err_probe(&i2c->dev, PTR_ERR(adp5585->regmap),130 "Failed to initialize register map\n");131 132 ret = regmap_read(adp5585->regmap, ADP5585_ID, &id);133 if (ret)134 return dev_err_probe(&i2c->dev, ret,135 "Failed to read device ID\n");136 137 if ((id & ADP5585_MAN_ID_MASK) != ADP5585_MAN_ID_VALUE)138 return dev_err_probe(&i2c->dev, -ENODEV,139 "Invalid device ID 0x%02x\n", id);140 141 ret = devm_mfd_add_devices(&i2c->dev, PLATFORM_DEVID_AUTO,142 adp5585_devs, ARRAY_SIZE(adp5585_devs),143 NULL, 0, NULL);144 if (ret)145 return dev_err_probe(&i2c->dev, ret,146 "Failed to add child devices\n");147 148 return 0;149}150 151static int adp5585_suspend(struct device *dev)152{153 struct adp5585_dev *adp5585 = dev_get_drvdata(dev);154 155 regcache_cache_only(adp5585->regmap, true);156 157 return 0;158}159 160static int adp5585_resume(struct device *dev)161{162 struct adp5585_dev *adp5585 = dev_get_drvdata(dev);163 164 regcache_cache_only(adp5585->regmap, false);165 regcache_mark_dirty(adp5585->regmap);166 167 return regcache_sync(adp5585->regmap);168}169 170static DEFINE_SIMPLE_DEV_PM_OPS(adp5585_pm, adp5585_suspend, adp5585_resume);171 172static const struct of_device_id adp5585_of_match[] = {173 {174 .compatible = "adi,adp5585-00",175 .data = &adp5585_regmap_configs[ADP5585_REGMAP_00],176 }, {177 .compatible = "adi,adp5585-01",178 .data = &adp5585_regmap_configs[ADP5585_REGMAP_00],179 }, {180 .compatible = "adi,adp5585-02",181 .data = &adp5585_regmap_configs[ADP5585_REGMAP_02],182 }, {183 .compatible = "adi,adp5585-03",184 .data = &adp5585_regmap_configs[ADP5585_REGMAP_00],185 }, {186 .compatible = "adi,adp5585-04",187 .data = &adp5585_regmap_configs[ADP5585_REGMAP_04],188 },189 { /* sentinel */ }190};191MODULE_DEVICE_TABLE(of, adp5585_of_match);192 193static struct i2c_driver adp5585_i2c_driver = {194 .driver = {195 .name = "adp5585",196 .of_match_table = adp5585_of_match,197 .pm = pm_sleep_ptr(&adp5585_pm),198 },199 .probe = adp5585_i2c_probe,200};201module_i2c_driver(adp5585_i2c_driver);202 203MODULE_DESCRIPTION("ADP5585 core driver");204MODULE_AUTHOR("Haibo Chen <haibo.chen@nxp.com>");205MODULE_LICENSE("GPL");206