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1// SPDX-License-Identifier: GPL-2.0+2//3// max77693.c - mfd core driver for the MAX 776934//5// Copyright (C) 2012 Samsung Electronics6// SangYoung Son <hello.son@samsung.com>7//8// This program is not provided / owned by Maxim Integrated Products.9//10// This driver is based on max8997.c11 12#include <linux/module.h>13#include <linux/slab.h>14#include <linux/i2c.h>15#include <linux/err.h>16#include <linux/interrupt.h>17#include <linux/of.h>18#include <linux/pm_runtime.h>19#include <linux/mutex.h>20#include <linux/mfd/core.h>21#include <linux/mfd/max77693.h>22#include <linux/mfd/max77693-common.h>23#include <linux/mfd/max77693-private.h>24#include <linux/regulator/machine.h>25#include <linux/regmap.h>26 27#define I2C_ADDR_PMIC	(0xCC >> 1)	/* Charger, Flash LED */28#define I2C_ADDR_MUIC	(0x4A >> 1)29#define I2C_ADDR_HAPTIC	(0x90 >> 1)30 31static const struct mfd_cell max77693_devs[] = {32	{ .name = "max77693-pmic", },33	{34		.name = "max77693-charger",35		.of_compatible = "maxim,max77693-charger",36	},37	{38		.name = "max77693-muic",39		.of_compatible = "maxim,max77693-muic",40	},41	{42		.name = "max77693-haptic",43		.of_compatible = "maxim,max77693-haptic",44	},45	{46		.name = "max77693-led",47		.of_compatible = "maxim,max77693-led",48	},49};50 51static const struct regmap_config max77693_regmap_config = {52	.reg_bits = 8,53	.val_bits = 8,54	.max_register = MAX77693_PMIC_REG_END,55};56 57static const struct regmap_irq max77693_led_irqs[] = {58	{ .mask = LED_IRQ_FLED2_OPEN,  },59	{ .mask = LED_IRQ_FLED2_SHORT, },60	{ .mask = LED_IRQ_FLED1_OPEN,  },61	{ .mask = LED_IRQ_FLED1_SHORT, },62	{ .mask = LED_IRQ_MAX_FLASH,   },63};64 65static const struct regmap_irq_chip max77693_led_irq_chip = {66	.name			= "max77693-led",67	.status_base		= MAX77693_LED_REG_FLASH_INT,68	.mask_base		= MAX77693_LED_REG_FLASH_INT_MASK,69	.num_regs		= 1,70	.irqs			= max77693_led_irqs,71	.num_irqs		= ARRAY_SIZE(max77693_led_irqs),72};73 74static const struct regmap_irq max77693_topsys_irqs[] = {75	{ .mask = TOPSYS_IRQ_T120C_INT,  },76	{ .mask = TOPSYS_IRQ_T140C_INT,  },77	{ .mask = TOPSYS_IRQ_LOWSYS_INT, },78};79 80static const struct regmap_irq_chip max77693_topsys_irq_chip = {81	.name			= "max77693-topsys",82	.status_base		= MAX77693_PMIC_REG_TOPSYS_INT,83	.mask_base		= MAX77693_PMIC_REG_TOPSYS_INT_MASK,84	.num_regs		= 1,85	.irqs			= max77693_topsys_irqs,86	.num_irqs		= ARRAY_SIZE(max77693_topsys_irqs),87};88 89static const struct regmap_irq max77693_charger_irqs[] = {90	{ .mask = CHG_IRQ_BYP_I,   },91	{ .mask = CHG_IRQ_THM_I,   },92	{ .mask = CHG_IRQ_BAT_I,   },93	{ .mask = CHG_IRQ_CHG_I,   },94	{ .mask = CHG_IRQ_CHGIN_I, },95};96 97static const struct regmap_irq_chip max77693_charger_irq_chip = {98	.name			= "max77693-charger",99	.status_base		= MAX77693_CHG_REG_CHG_INT,100	.mask_base		= MAX77693_CHG_REG_CHG_INT_MASK,101	.num_regs		= 1,102	.irqs			= max77693_charger_irqs,103	.num_irqs		= ARRAY_SIZE(max77693_charger_irqs),104};105 106static const struct regmap_config max77693_regmap_muic_config = {107	.reg_bits = 8,108	.val_bits = 8,109	.max_register = MAX77693_MUIC_REG_END,110};111 112static const struct regmap_irq max77693_muic_irqs[] = {113	{ .reg_offset = 0, .mask = MUIC_IRQ_INT1_ADC,		},114	{ .reg_offset = 0, .mask = MUIC_IRQ_INT1_ADC_LOW,	},115	{ .reg_offset = 0, .mask = MUIC_IRQ_INT1_ADC_ERR,	},116	{ .reg_offset = 0, .mask = MUIC_IRQ_INT1_ADC1K,		},117 118	{ .reg_offset = 1, .mask = MUIC_IRQ_INT2_CHGTYP,	},119	{ .reg_offset = 1, .mask = MUIC_IRQ_INT2_CHGDETREUN,	},120	{ .reg_offset = 1, .mask = MUIC_IRQ_INT2_DCDTMR,	},121	{ .reg_offset = 1, .mask = MUIC_IRQ_INT2_DXOVP,		},122	{ .reg_offset = 1, .mask = MUIC_IRQ_INT2_VBVOLT,	},123	{ .reg_offset = 1, .mask = MUIC_IRQ_INT2_VIDRM,		},124 125	{ .reg_offset = 2, .mask = MUIC_IRQ_INT3_EOC,		},126	{ .reg_offset = 2, .mask = MUIC_IRQ_INT3_CGMBC,		},127	{ .reg_offset = 2, .mask = MUIC_IRQ_INT3_OVP,		},128	{ .reg_offset = 2, .mask = MUIC_IRQ_INT3_MBCCHG_ERR,	},129	{ .reg_offset = 2, .mask = MUIC_IRQ_INT3_CHG_ENABLED,	},130	{ .reg_offset = 2, .mask = MUIC_IRQ_INT3_BAT_DET,	},131};132 133static const struct regmap_irq_chip max77693_muic_irq_chip = {134	.name			= "max77693-muic",135	.status_base		= MAX77693_MUIC_REG_INT1,136	.unmask_base		= MAX77693_MUIC_REG_INTMASK1,137	.num_regs		= 3,138	.irqs			= max77693_muic_irqs,139	.num_irqs		= ARRAY_SIZE(max77693_muic_irqs),140};141 142static const struct regmap_config max77693_regmap_haptic_config = {143	.reg_bits = 8,144	.val_bits = 8,145	.max_register = MAX77693_HAPTIC_REG_END,146};147 148static int max77693_i2c_probe(struct i2c_client *i2c)149{150	const struct i2c_device_id *id = i2c_client_get_device_id(i2c);151	struct max77693_dev *max77693;152	unsigned int reg_data;153	int ret = 0;154 155	max77693 = devm_kzalloc(&i2c->dev,156			sizeof(struct max77693_dev), GFP_KERNEL);157	if (max77693 == NULL)158		return -ENOMEM;159 160	i2c_set_clientdata(i2c, max77693);161	max77693->dev = &i2c->dev;162	max77693->i2c = i2c;163	max77693->irq = i2c->irq;164	max77693->type = id->driver_data;165 166	max77693->regmap = devm_regmap_init_i2c(i2c, &max77693_regmap_config);167	if (IS_ERR(max77693->regmap)) {168		ret = PTR_ERR(max77693->regmap);169		dev_err(max77693->dev, "failed to allocate register map: %d\n",170				ret);171		return ret;172	}173 174	ret = regmap_read(max77693->regmap, MAX77693_PMIC_REG_PMIC_ID2,175				&reg_data);176	if (ret < 0) {177		dev_err(max77693->dev, "device not found on this channel\n");178		return ret;179	} else180		dev_info(max77693->dev, "device ID: 0x%x\n", reg_data);181 182	max77693->i2c_muic = i2c_new_dummy_device(i2c->adapter, I2C_ADDR_MUIC);183	if (IS_ERR(max77693->i2c_muic)) {184		dev_err(max77693->dev, "Failed to allocate I2C device for MUIC\n");185		return PTR_ERR(max77693->i2c_muic);186	}187	i2c_set_clientdata(max77693->i2c_muic, max77693);188 189	max77693->i2c_haptic = i2c_new_dummy_device(i2c->adapter, I2C_ADDR_HAPTIC);190	if (IS_ERR(max77693->i2c_haptic)) {191		dev_err(max77693->dev, "Failed to allocate I2C device for Haptic\n");192		ret = PTR_ERR(max77693->i2c_haptic);193		goto err_i2c_haptic;194	}195	i2c_set_clientdata(max77693->i2c_haptic, max77693);196 197	max77693->regmap_haptic = devm_regmap_init_i2c(max77693->i2c_haptic,198					&max77693_regmap_haptic_config);199	if (IS_ERR(max77693->regmap_haptic)) {200		ret = PTR_ERR(max77693->regmap_haptic);201		dev_err(max77693->dev,202			"failed to initialize haptic register map: %d\n", ret);203		goto err_regmap;204	}205 206	/*207	 * Initialize register map for MUIC device because use regmap-muic208	 * instance of MUIC device when irq of max77693 is initialized209	 * before call max77693-muic probe() function.210	 */211	max77693->regmap_muic = devm_regmap_init_i2c(max77693->i2c_muic,212					 &max77693_regmap_muic_config);213	if (IS_ERR(max77693->regmap_muic)) {214		ret = PTR_ERR(max77693->regmap_muic);215		dev_err(max77693->dev,216			"failed to allocate register map: %d\n", ret);217		goto err_regmap;218	}219 220	ret = regmap_add_irq_chip(max77693->regmap, max77693->irq,221				IRQF_ONESHOT | IRQF_SHARED, 0,222				&max77693_led_irq_chip,223				&max77693->irq_data_led);224	if (ret) {225		dev_err(max77693->dev, "failed to add irq chip: %d\n", ret);226		goto err_regmap;227	}228 229	ret = regmap_add_irq_chip(max77693->regmap, max77693->irq,230				IRQF_ONESHOT | IRQF_SHARED, 0,231				&max77693_topsys_irq_chip,232				&max77693->irq_data_topsys);233	if (ret) {234		dev_err(max77693->dev, "failed to add irq chip: %d\n", ret);235		goto err_irq_topsys;236	}237 238	ret = regmap_add_irq_chip(max77693->regmap, max77693->irq,239				IRQF_ONESHOT | IRQF_SHARED, 0,240				&max77693_charger_irq_chip,241				&max77693->irq_data_chg);242	if (ret) {243		dev_err(max77693->dev, "failed to add irq chip: %d\n", ret);244		goto err_irq_charger;245	}246 247	ret = regmap_add_irq_chip(max77693->regmap_muic, max77693->irq,248				IRQF_ONESHOT | IRQF_SHARED, 0,249				&max77693_muic_irq_chip,250				&max77693->irq_data_muic);251	if (ret) {252		dev_err(max77693->dev, "failed to add irq chip: %d\n", ret);253		goto err_irq_muic;254	}255 256	/* Unmask interrupts from all blocks in interrupt source register */257	ret = regmap_update_bits(max77693->regmap,258				MAX77693_PMIC_REG_INTSRC_MASK,259				SRC_IRQ_ALL, (unsigned int)~SRC_IRQ_ALL);260	if (ret < 0) {261		dev_err(max77693->dev,262			"Could not unmask interrupts in INTSRC: %d\n",263			ret);264		goto err_intsrc;265	}266 267	pm_runtime_set_active(max77693->dev);268 269	ret = mfd_add_devices(max77693->dev, -1, max77693_devs,270			      ARRAY_SIZE(max77693_devs), NULL, 0, NULL);271	if (ret < 0)272		goto err_mfd;273 274	return ret;275 276err_mfd:277	mfd_remove_devices(max77693->dev);278err_intsrc:279	regmap_del_irq_chip(max77693->irq, max77693->irq_data_muic);280err_irq_muic:281	regmap_del_irq_chip(max77693->irq, max77693->irq_data_chg);282err_irq_charger:283	regmap_del_irq_chip(max77693->irq, max77693->irq_data_topsys);284err_irq_topsys:285	regmap_del_irq_chip(max77693->irq, max77693->irq_data_led);286err_regmap:287	i2c_unregister_device(max77693->i2c_haptic);288err_i2c_haptic:289	i2c_unregister_device(max77693->i2c_muic);290	return ret;291}292 293static void max77693_i2c_remove(struct i2c_client *i2c)294{295	struct max77693_dev *max77693 = i2c_get_clientdata(i2c);296 297	mfd_remove_devices(max77693->dev);298 299	regmap_del_irq_chip(max77693->irq, max77693->irq_data_muic);300	regmap_del_irq_chip(max77693->irq, max77693->irq_data_chg);301	regmap_del_irq_chip(max77693->irq, max77693->irq_data_topsys);302	regmap_del_irq_chip(max77693->irq, max77693->irq_data_led);303 304	i2c_unregister_device(max77693->i2c_muic);305	i2c_unregister_device(max77693->i2c_haptic);306}307 308static const struct i2c_device_id max77693_i2c_id[] = {309	{ "max77693", TYPE_MAX77693 },310	{ }311};312MODULE_DEVICE_TABLE(i2c, max77693_i2c_id);313 314static int max77693_suspend(struct device *dev)315{316	struct i2c_client *i2c = to_i2c_client(dev);317	struct max77693_dev *max77693 = i2c_get_clientdata(i2c);318 319	if (device_may_wakeup(dev)) {320		enable_irq_wake(max77693->irq);321		disable_irq(max77693->irq);322	}323 324	return 0;325}326 327static int max77693_resume(struct device *dev)328{329	struct i2c_client *i2c = to_i2c_client(dev);330	struct max77693_dev *max77693 = i2c_get_clientdata(i2c);331 332	if (device_may_wakeup(dev)) {333		disable_irq_wake(max77693->irq);334		enable_irq(max77693->irq);335	}336 337	return 0;338}339 340static const struct dev_pm_ops max77693_pm = {341	.suspend = max77693_suspend,342	.resume = max77693_resume,343};344 345#ifdef CONFIG_OF346static const struct of_device_id max77693_dt_match[] = {347	{ .compatible = "maxim,max77693" },348	{},349};350MODULE_DEVICE_TABLE(of, max77693_dt_match);351#endif352 353static struct i2c_driver max77693_i2c_driver = {354	.driver = {355		   .name = "max77693",356		   .pm = &max77693_pm,357		   .of_match_table = of_match_ptr(max77693_dt_match),358	},359	.probe = max77693_i2c_probe,360	.remove = max77693_i2c_remove,361	.id_table = max77693_i2c_id,362};363 364module_i2c_driver(max77693_i2c_driver);365 366MODULE_DESCRIPTION("MAXIM 77693 multi-function core driver");367MODULE_AUTHOR("SangYoung, Son <hello.son@samsung.com>");368MODULE_LICENSE("GPL");369