[linux.git] / drivers / mfd / max77843.c

// SPDX-License-Identifier: GPL-2.0+
//
// MFD core driver for the Maxim MAX77843
//
// Copyright (C) 2015 Samsung Electronics
// Author: Jaewon Kim <[email protected]>
// Author: Beomho Seo <[email protected]>

#include <linux/err.h>
#include <linux/i2c.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/mfd/core.h>
#include <linux/mfd/max77693-common.h>
#include <linux/mfd/max77843-private.h>
#include <linux/mod_devicetable.h>
#include <linux/platform_device.h>

static const struct mfd_cell max77843_devs[] = {
	{
		.name = "max77843-muic",
		.of_compatible = "maxim,max77843-muic",
	}, {
		.name = "max77843-regulator",
		.of_compatible = "maxim,max77843-regulator",
	}, {
		.name = "max77843-charger",
		.of_compatible = "maxim,max77843-charger"
	}, {
		.name = "max77843-fuelgauge",
		.of_compatible = "maxim,max77843-fuelgauge",
	}, {
		.name = "max77843-haptic",
		.of_compatible = "maxim,max77843-haptic",
	},
};

static const struct regmap_config max77843_charger_regmap_config = {
	.reg_bits	= 8,
	.val_bits	= 8,
	.max_register	= MAX77843_CHG_REG_END,
};

static const struct regmap_config max77843_regmap_config = {
	.reg_bits	= 8,
	.val_bits	= 8,
	.max_register	= MAX77843_SYS_REG_END,
};

static const struct regmap_irq max77843_irqs[] = {
	/* TOPSYS interrupts */
	{ .reg_offset = 0, .mask = MAX77843_SYS_IRQ_SYSUVLO_INT, },
	{ .reg_offset = 0, .mask = MAX77843_SYS_IRQ_SYSOVLO_INT, },
	{ .reg_offset = 0, .mask = MAX77843_SYS_IRQ_TSHDN_INT, },
	{ .reg_offset = 0, .mask = MAX77843_SYS_IRQ_TM_INT, },
};

static const struct regmap_irq_chip max77843_irq_chip = {
	.name		= "max77843",
	.status_base	= MAX77843_SYS_REG_SYSINTSRC,
	.mask_base	= MAX77843_SYS_REG_SYSINTMASK,
	.num_regs	= 1,
	.irqs		= max77843_irqs,
	.num_irqs	= ARRAY_SIZE(max77843_irqs),
};

/* Charger and Charger regulator use same regmap. */
static int max77843_chg_init(struct max77693_dev *max77843)
{
	int ret;

	max77843->i2c_chg = i2c_new_dummy_device(max77843->i2c->adapter, I2C_ADDR_CHG);
	if (IS_ERR(max77843->i2c_chg)) {
		dev_err(&max77843->i2c->dev,
				"Cannot allocate I2C device for Charger\n");
		return PTR_ERR(max77843->i2c_chg);
	}
	i2c_set_clientdata(max77843->i2c_chg, max77843);

	max77843->regmap_chg = devm_regmap_init_i2c(max77843->i2c_chg,
			&max77843_charger_regmap_config);
	if (IS_ERR(max77843->regmap_chg)) {
		ret = PTR_ERR(max77843->regmap_chg);
		goto err_chg_i2c;
	}

	return 0;

err_chg_i2c:
	i2c_unregister_device(max77843->i2c_chg);

	return ret;
}

static int max77843_probe(struct i2c_client *i2c)
{
	const struct i2c_device_id *id = i2c_client_get_device_id(i2c);
	struct max77693_dev *max77843;
	unsigned int reg_data;
	int ret;

	max77843 = devm_kzalloc(&i2c->dev, sizeof(*max77843), GFP_KERNEL);
	if (!max77843)
		return -ENOMEM;

	i2c_set_clientdata(i2c, max77843);
	max77843->dev = &i2c->dev;
	max77843->i2c = i2c;
	max77843->irq = i2c->irq;
	max77843->type = id->driver_data;

	max77843->regmap = devm_regmap_init_i2c(i2c,
			&max77843_regmap_config);
	if (IS_ERR(max77843->regmap)) {
		dev_err(&i2c->dev, "Failed to allocate topsys register map\n");
		return PTR_ERR(max77843->regmap);
	}

	ret = regmap_add_irq_chip(max77843->regmap, max77843->irq,
			IRQF_TRIGGER_LOW | IRQF_ONESHOT | IRQF_SHARED,
			0, &max77843_irq_chip, &max77843->irq_data_topsys);
	if (ret) {
		dev_err(&i2c->dev, "Failed to add TOPSYS IRQ chip\n");
		return ret;
	}

	ret = regmap_read(max77843->regmap,
			MAX77843_SYS_REG_PMICID, &reg_data);
	if (ret < 0) {
		dev_err(&i2c->dev, "Failed to read PMIC ID\n");
		goto err_pmic_id;
	}
	dev_info(&i2c->dev, "device ID: 0x%x\n", reg_data);

	ret = max77843_chg_init(max77843);
	if (ret) {
		dev_err(&i2c->dev, "Failed to init Charger\n");
		goto err_pmic_id;
	}

	ret = regmap_update_bits(max77843->regmap,
				 MAX77843_SYS_REG_INTSRCMASK,
				 MAX77843_INTSRC_MASK_MASK,
				 (unsigned int)~MAX77843_INTSRC_MASK_MASK);
	if (ret < 0) {
		dev_err(&i2c->dev, "Failed to unmask interrupt source\n");
		goto err_pmic_id;
	}

	ret = mfd_add_devices(max77843->dev, -1, max77843_devs,
			      ARRAY_SIZE(max77843_devs), NULL, 0, NULL);
	if (ret < 0) {
		dev_err(&i2c->dev, "Failed to add mfd device\n");
		goto err_pmic_id;
	}

	device_init_wakeup(max77843->dev, true);

	return 0;

err_pmic_id:
	regmap_del_irq_chip(max77843->irq, max77843->irq_data_topsys);

	return ret;
}

static const struct of_device_id max77843_dt_match[] = {
	{ .compatible = "maxim,max77843", },
	{ },
};

static const struct i2c_device_id max77843_id[] = {
	{ "max77843", TYPE_MAX77843, },
	{ },
};

static int __maybe_unused max77843_suspend(struct device *dev)
{
	struct i2c_client *i2c = to_i2c_client(dev);
	struct max77693_dev *max77843 = i2c_get_clientdata(i2c);

	disable_irq(max77843->irq);
	if (device_may_wakeup(dev))
		enable_irq_wake(max77843->irq);

	return 0;
}

static int __maybe_unused max77843_resume(struct device *dev)
{
	struct i2c_client *i2c = to_i2c_client(dev);
	struct max77693_dev *max77843 = i2c_get_clientdata(i2c);

	if (device_may_wakeup(dev))
		disable_irq_wake(max77843->irq);
	enable_irq(max77843->irq);

	return 0;
}

static SIMPLE_DEV_PM_OPS(max77843_pm, max77843_suspend, max77843_resume);

static struct i2c_driver max77843_i2c_driver = {
	.driver	= {
		.name = "max77843",
		.pm = &max77843_pm,
		.of_match_table = max77843_dt_match,
		.suppress_bind_attrs = true,
	},
	.probe = max77843_probe,
	.id_table = max77843_id,
};

static int __init max77843_i2c_init(void)
{
	return i2c_add_driver(&max77843_i2c_driver);
}
subsys_initcall(max77843_i2c_init);
Commit	Line	Data
d7d8d7a2 KK	1	// SPDX-License-Identifier: GPL-2.0+
	2	//
	3	// MFD core driver for the Maxim MAX77843
	4	//
	5	// Copyright (C) 2015 Samsung Electronics
	6	// Author: Jaewon Kim <[email protected]>
	7	// Author: Beomho Seo <[email protected]>
c7f585fe JK	8
	9	#include <linux/err.h>
	10	#include <linux/i2c.h>
	11	#include <linux/init.h>
	12	#include <linux/interrupt.h>
c7f585fe	13	#include <linux/mfd/core.h>
bc1aadc1	14	#include <linux/mfd/max77693-common.h>
c7f585fe	15	#include <linux/mfd/max77843-private.h>
dc0c386e	16	#include <linux/mod_devicetable.h>
c7f585fe JK	17	#include <linux/platform_device.h>
	18
	19	static const struct mfd_cell max77843_devs[] = {
	20	{
	21	.name = "max77843-muic",
	22	.of_compatible = "maxim,max77843-muic",
	23	}, {
	24	.name = "max77843-regulator",
	25	.of_compatible = "maxim,max77843-regulator",
	26	}, {
	27	.name = "max77843-charger",
	28	.of_compatible = "maxim,max77843-charger"
	29	}, {
	30	.name = "max77843-fuelgauge",
	31	.of_compatible = "maxim,max77843-fuelgauge",
	32	}, {
	33	.name = "max77843-haptic",
	34	.of_compatible = "maxim,max77843-haptic",
	35	},
	36	};
	37
	38	static const struct regmap_config max77843_charger_regmap_config = {
	39	.reg_bits = 8,
	40	.val_bits = 8,
	41	.max_register = MAX77843_CHG_REG_END,
	42	};
	43
	44	static const struct regmap_config max77843_regmap_config = {
	45	.reg_bits = 8,
	46	.val_bits = 8,
	47	.max_register = MAX77843_SYS_REG_END,
	48	};
	49
	50	static const struct regmap_irq max77843_irqs[] = {
	51	/* TOPSYS interrupts */
	52	{ .reg_offset = 0, .mask = MAX77843_SYS_IRQ_SYSUVLO_INT, },
	53	{ .reg_offset = 0, .mask = MAX77843_SYS_IRQ_SYSOVLO_INT, },
	54	{ .reg_offset = 0, .mask = MAX77843_SYS_IRQ_TSHDN_INT, },
	55	{ .reg_offset = 0, .mask = MAX77843_SYS_IRQ_TM_INT, },
	56	};
	57
	58	static const struct regmap_irq_chip max77843_irq_chip = {
	59	.name = "max77843",
	60	.status_base = MAX77843_SYS_REG_SYSINTSRC,
	61	.mask_base = MAX77843_SYS_REG_SYSINTMASK,
c7f585fe JK	62	.num_regs = 1,
	63	.irqs = max77843_irqs,
	64	.num_irqs = ARRAY_SIZE(max77843_irqs),
	65	};
	66
	67	/* Charger and Charger regulator use same regmap. */
bc1aadc1	68	static int max77843_chg_init(struct max77693_dev *max77843)
c7f585fe JK	69	{
	70	int ret;
	71
0005a9e1 WS	72	max77843->i2c_chg = i2c_new_dummy_device(max77843->i2c->adapter, I2C_ADDR_CHG);
0005a9e1 WS	73	if (IS_ERR(max77843->i2c_chg)) {
c7f585fe JK	74	dev_err(&max77843->i2c->dev,
c7f585fe JK	75	"Cannot allocate I2C device for Charger\n");
0005a9e1	76	return PTR_ERR(max77843->i2c_chg);
c7f585fe JK	77	}
	78	i2c_set_clientdata(max77843->i2c_chg, max77843);
	79
	80	max77843->regmap_chg = devm_regmap_init_i2c(max77843->i2c_chg,
	81	&max77843_charger_regmap_config);
	82	if (IS_ERR(max77843->regmap_chg)) {
	83	ret = PTR_ERR(max77843->regmap_chg);
	84	goto err_chg_i2c;
	85	}
	86
	87	return 0;
	88
	89	err_chg_i2c:
	90	i2c_unregister_device(max77843->i2c_chg);
	91
	92	return ret;
	93	}
	94
13c6de60	95	static int max77843_probe(struct i2c_client *i2c)
c7f585fe	96	{
13c6de60	97	const struct i2c_device_id *id = i2c_client_get_device_id(i2c);
bc1aadc1	98	struct max77693_dev *max77843;
c7f585fe JK	99	unsigned int reg_data;
	100	int ret;
	101
	102	max77843 = devm_kzalloc(&i2c->dev, sizeof(*max77843), GFP_KERNEL);
	103	if (!max77843)
	104	return -ENOMEM;
	105
	106	i2c_set_clientdata(i2c, max77843);
	107	max77843->dev = &i2c->dev;
	108	max77843->i2c = i2c;
	109	max77843->irq = i2c->irq;
bc1aadc1	110	max77843->type = id->driver_data;
c7f585fe JK	111
	112	max77843->regmap = devm_regmap_init_i2c(i2c,
	113	&max77843_regmap_config);
	114	if (IS_ERR(max77843->regmap)) {
	115	dev_err(&i2c->dev, "Failed to allocate topsys register map\n");
	116	return PTR_ERR(max77843->regmap);
	117	}
	118
	119	ret = regmap_add_irq_chip(max77843->regmap, max77843->irq,
	120	IRQF_TRIGGER_LOW \| IRQF_ONESHOT \| IRQF_SHARED,
bc1aadc1	121	0, &max77843_irq_chip, &max77843->irq_data_topsys);
c7f585fe JK	122	if (ret) {
	123	dev_err(&i2c->dev, "Failed to add TOPSYS IRQ chip\n");
	124	return ret;
	125	}
	126
	127	ret = regmap_read(max77843->regmap,
	128	MAX77843_SYS_REG_PMICID, &reg_data);
	129	if (ret < 0) {
	130	dev_err(&i2c->dev, "Failed to read PMIC ID\n");
	131	goto err_pmic_id;
	132	}
	133	dev_info(&i2c->dev, "device ID: 0x%x\n", reg_data);
	134
	135	ret = max77843_chg_init(max77843);
	136	if (ret) {
	137	dev_err(&i2c->dev, "Failed to init Charger\n");
	138	goto err_pmic_id;
	139	}
	140
	141	ret = regmap_update_bits(max77843->regmap,
	142	MAX77843_SYS_REG_INTSRCMASK,
	143	MAX77843_INTSRC_MASK_MASK,
	144	(unsigned int)~MAX77843_INTSRC_MASK_MASK);
	145	if (ret < 0) {
	146	dev_err(&i2c->dev, "Failed to unmask interrupt source\n");
	147	goto err_pmic_id;
	148	}
	149
	150	ret = mfd_add_devices(max77843->dev, -1, max77843_devs,
	151	ARRAY_SIZE(max77843_devs), NULL, 0, NULL);
	152	if (ret < 0) {
	153	dev_err(&i2c->dev, "Failed to add mfd device\n");
	154	goto err_pmic_id;
	155	}
	156
	157	device_init_wakeup(max77843->dev, true);
	158
	159	return 0;
	160
	161	err_pmic_id:
bc1aadc1	162	regmap_del_irq_chip(max77843->irq, max77843->irq_data_topsys);
c7f585fe JK	163
	164	return ret;
	165	}
	166
c7f585fe JK	167	static const struct of_device_id max77843_dt_match[] = {
	168	{ .compatible = "maxim,max77843", },
	169	{ },
	170	};
	171
	172	static const struct i2c_device_id max77843_id[] = {
bc1aadc1	173	{ "max77843", TYPE_MAX77843, },
c7f585fe JK	174	{ },
c7f585fe JK	175	};
c7f585fe JK	176
	177	static int __maybe_unused max77843_suspend(struct device *dev)
	178	{
1b5420e1	179	struct i2c_client *i2c = to_i2c_client(dev);
bc1aadc1	180	struct max77693_dev *max77843 = i2c_get_clientdata(i2c);
c7f585fe JK	181
	182	disable_irq(max77843->irq);
	183	if (device_may_wakeup(dev))
	184	enable_irq_wake(max77843->irq);
	185
	186	return 0;
	187	}
	188
	189	static int __maybe_unused max77843_resume(struct device *dev)
	190	{
1b5420e1	191	struct i2c_client *i2c = to_i2c_client(dev);
bc1aadc1	192	struct max77693_dev *max77843 = i2c_get_clientdata(i2c);
c7f585fe JK	193
	194	if (device_may_wakeup(dev))
	195	disable_irq_wake(max77843->irq);
	196	enable_irq(max77843->irq);
	197
	198	return 0;
	199	}
	200
	201	static SIMPLE_DEV_PM_OPS(max77843_pm, max77843_suspend, max77843_resume);
	202
	203	static struct i2c_driver max77843_i2c_driver = {
	204	.driver = {
	205	.name = "max77843",
	206	.pm = &max77843_pm,
	207	.of_match_table = max77843_dt_match,
38f70da3	208	.suppress_bind_attrs = true,
c7f585fe	209	},
9816d859	210	.probe = max77843_probe,
c7f585fe JK	211	.id_table = max77843_id,
	212	};
	213
	214	static int __init max77843_i2c_init(void)
	215	{
	216	return i2c_add_driver(&max77843_i2c_driver);
	217	}
	218	subsys_initcall(max77843_i2c_init);