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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * TI LP8788 MFD - core interface4 *5 * Copyright 2012 Texas Instruments6 *7 * Author: Milo(Woogyom) Kim <milo.kim@ti.com>8 */9 10#include <linux/err.h>11#include <linux/i2c.h>12#include <linux/mfd/core.h>13#include <linux/mfd/lp8788.h>14#include <linux/module.h>15#include <linux/slab.h>16 17#define MAX_LP8788_REGISTERS 0xA218 19#define MFD_DEV_SIMPLE(_name) \20{ \21 .name = LP8788_DEV_##_name, \22}23 24#define MFD_DEV_WITH_ID(_name, _id) \25{ \26 .name = LP8788_DEV_##_name, \27 .id = _id, \28}29 30#define MFD_DEV_WITH_RESOURCE(_name, _resource, num_resource) \31{ \32 .name = LP8788_DEV_##_name, \33 .resources = _resource, \34 .num_resources = num_resource, \35}36 37static const struct resource chg_irqs[] = {38 /* Charger Interrupts */39 {40 .start = LP8788_INT_CHG_INPUT_STATE,41 .end = LP8788_INT_PRECHG_TIMEOUT,42 .name = LP8788_CHG_IRQ,43 .flags = IORESOURCE_IRQ,44 },45 /* Power Routing Switch Interrupts */46 {47 .start = LP8788_INT_ENTER_SYS_SUPPORT,48 .end = LP8788_INT_EXIT_SYS_SUPPORT,49 .name = LP8788_PRSW_IRQ,50 .flags = IORESOURCE_IRQ,51 },52 /* Battery Interrupts */53 {54 .start = LP8788_INT_BATT_LOW,55 .end = LP8788_INT_NO_BATT,56 .name = LP8788_BATT_IRQ,57 .flags = IORESOURCE_IRQ,58 },59};60 61static const struct resource rtc_irqs[] = {62 {63 .start = LP8788_INT_RTC_ALARM1,64 .end = LP8788_INT_RTC_ALARM2,65 .name = LP8788_ALM_IRQ,66 .flags = IORESOURCE_IRQ,67 },68};69 70static const struct mfd_cell lp8788_devs[] = {71 /* 4 bucks */72 MFD_DEV_WITH_ID(BUCK, 1),73 MFD_DEV_WITH_ID(BUCK, 2),74 MFD_DEV_WITH_ID(BUCK, 3),75 MFD_DEV_WITH_ID(BUCK, 4),76 77 /* 12 digital ldos */78 MFD_DEV_WITH_ID(DLDO, 1),79 MFD_DEV_WITH_ID(DLDO, 2),80 MFD_DEV_WITH_ID(DLDO, 3),81 MFD_DEV_WITH_ID(DLDO, 4),82 MFD_DEV_WITH_ID(DLDO, 5),83 MFD_DEV_WITH_ID(DLDO, 6),84 MFD_DEV_WITH_ID(DLDO, 7),85 MFD_DEV_WITH_ID(DLDO, 8),86 MFD_DEV_WITH_ID(DLDO, 9),87 MFD_DEV_WITH_ID(DLDO, 10),88 MFD_DEV_WITH_ID(DLDO, 11),89 MFD_DEV_WITH_ID(DLDO, 12),90 91 /* 10 analog ldos */92 MFD_DEV_WITH_ID(ALDO, 1),93 MFD_DEV_WITH_ID(ALDO, 2),94 MFD_DEV_WITH_ID(ALDO, 3),95 MFD_DEV_WITH_ID(ALDO, 4),96 MFD_DEV_WITH_ID(ALDO, 5),97 MFD_DEV_WITH_ID(ALDO, 6),98 MFD_DEV_WITH_ID(ALDO, 7),99 MFD_DEV_WITH_ID(ALDO, 8),100 MFD_DEV_WITH_ID(ALDO, 9),101 MFD_DEV_WITH_ID(ALDO, 10),102 103 /* ADC */104 MFD_DEV_SIMPLE(ADC),105 106 /* battery charger */107 MFD_DEV_WITH_RESOURCE(CHARGER, chg_irqs, ARRAY_SIZE(chg_irqs)),108 109 /* rtc */110 MFD_DEV_WITH_RESOURCE(RTC, rtc_irqs, ARRAY_SIZE(rtc_irqs)),111 112 /* backlight */113 MFD_DEV_SIMPLE(BACKLIGHT),114 115 /* current sink for vibrator */116 MFD_DEV_SIMPLE(VIBRATOR),117 118 /* current sink for keypad LED */119 MFD_DEV_SIMPLE(KEYLED),120};121 122int lp8788_read_byte(struct lp8788 *lp, u8 reg, u8 *data)123{124 int ret;125 unsigned int val;126 127 ret = regmap_read(lp->regmap, reg, &val);128 if (ret < 0) {129 dev_err(lp->dev, "failed to read 0x%.2x\n", reg);130 return ret;131 }132 133 *data = (u8)val;134 return 0;135}136EXPORT_SYMBOL_GPL(lp8788_read_byte);137 138int lp8788_read_multi_bytes(struct lp8788 *lp, u8 reg, u8 *data, size_t count)139{140 return regmap_bulk_read(lp->regmap, reg, data, count);141}142EXPORT_SYMBOL_GPL(lp8788_read_multi_bytes);143 144int lp8788_write_byte(struct lp8788 *lp, u8 reg, u8 data)145{146 return regmap_write(lp->regmap, reg, data);147}148EXPORT_SYMBOL_GPL(lp8788_write_byte);149 150int lp8788_update_bits(struct lp8788 *lp, u8 reg, u8 mask, u8 data)151{152 return regmap_update_bits(lp->regmap, reg, mask, data);153}154EXPORT_SYMBOL_GPL(lp8788_update_bits);155 156static int lp8788_platform_init(struct lp8788 *lp)157{158 struct lp8788_platform_data *pdata = lp->pdata;159 160 return (pdata && pdata->init_func) ? pdata->init_func(lp) : 0;161}162 163static const struct regmap_config lp8788_regmap_config = {164 .reg_bits = 8,165 .val_bits = 8,166 .max_register = MAX_LP8788_REGISTERS,167};168 169static int lp8788_probe(struct i2c_client *cl)170{171 struct lp8788 *lp;172 struct lp8788_platform_data *pdata = dev_get_platdata(&cl->dev);173 int ret;174 175 lp = devm_kzalloc(&cl->dev, sizeof(struct lp8788), GFP_KERNEL);176 if (!lp)177 return -ENOMEM;178 179 lp->regmap = devm_regmap_init_i2c(cl, &lp8788_regmap_config);180 if (IS_ERR(lp->regmap)) {181 ret = PTR_ERR(lp->regmap);182 dev_err(&cl->dev, "regmap init i2c err: %d\n", ret);183 return ret;184 }185 186 lp->pdata = pdata;187 lp->dev = &cl->dev;188 i2c_set_clientdata(cl, lp);189 190 ret = lp8788_platform_init(lp);191 if (ret)192 return ret;193 194 ret = lp8788_irq_init(lp, cl->irq);195 if (ret)196 return ret;197 198 ret = mfd_add_devices(lp->dev, -1, lp8788_devs,199 ARRAY_SIZE(lp8788_devs), NULL, 0, NULL);200 if (ret)201 goto err_exit_irq;202 203 return 0;204 205err_exit_irq:206 lp8788_irq_exit(lp);207 return ret;208}209 210static void lp8788_remove(struct i2c_client *cl)211{212 struct lp8788 *lp = i2c_get_clientdata(cl);213 214 mfd_remove_devices(lp->dev);215 lp8788_irq_exit(lp);216}217 218static const struct i2c_device_id lp8788_ids[] = {219 { "lp8788" },220 { }221};222MODULE_DEVICE_TABLE(i2c, lp8788_ids);223 224static struct i2c_driver lp8788_driver = {225 .driver = {226 .name = "lp8788",227 },228 .probe = lp8788_probe,229 .remove = lp8788_remove,230 .id_table = lp8788_ids,231};232 233static int __init lp8788_init(void)234{235 return i2c_add_driver(&lp8788_driver);236}237subsys_initcall(lp8788_init);238 239static void __exit lp8788_exit(void)240{241 i2c_del_driver(&lp8788_driver);242}243module_exit(lp8788_exit);244 245MODULE_DESCRIPTION("TI LP8788 MFD Driver");246MODULE_AUTHOR("Milo Kim");247