[linux-block.git] / drivers / mfd / rt5033.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * MFD core driver for the Richtek RT5033.
 *
 * RT5033 comprises multiple sub-devices switcing charger, fuel gauge,
 * flash LED, current source, LDO and BUCK regulators.
 *
 * Copyright (C) 2014 Samsung Electronics, Co., Ltd.
 * Author: Beomho Seo <beomho.seo@samsung.com>
 */

#include <linux/err.h>
#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/mfd/core.h>
#include <linux/mfd/rt5033.h>
#include <linux/mfd/rt5033-private.h>

static const struct regmap_irq rt5033_irqs[] = {
	{ .mask = RT5033_PMIC_IRQ_BUCKOCP, },
	{ .mask = RT5033_PMIC_IRQ_BUCKLV, },
	{ .mask = RT5033_PMIC_IRQ_SAFELDOLV, },
	{ .mask = RT5033_PMIC_IRQ_LDOLV, },
	{ .mask = RT5033_PMIC_IRQ_OT, },
	{ .mask = RT5033_PMIC_IRQ_VDDA_UV, },
};

static const struct regmap_irq_chip rt5033_irq_chip = {
	.name		= "rt5033",
	.status_base	= RT5033_REG_PMIC_IRQ_STAT,
	.unmask_base	= RT5033_REG_PMIC_IRQ_CTRL,
	.num_regs	= 1,
	.irqs		= rt5033_irqs,
	.num_irqs	= ARRAY_SIZE(rt5033_irqs),
};

static const struct mfd_cell rt5033_devs[] = {
	{ .name = "rt5033-regulator", },
	{
		.name = "rt5033-charger",
		.of_compatible = "richtek,rt5033-charger",
	}, {
		.name = "rt5033-led",
		.of_compatible = "richtek,rt5033-led",
	},
};

static const struct regmap_config rt5033_regmap_config = {
	.reg_bits	= 8,
	.val_bits	= 8,
	.max_register	= RT5033_REG_END,
};

static int rt5033_i2c_probe(struct i2c_client *i2c)
{
	struct rt5033_dev *rt5033;
	unsigned int dev_id, chip_rev;
	int ret;

	rt5033 = devm_kzalloc(&i2c->dev, sizeof(*rt5033), GFP_KERNEL);
	if (!rt5033)
		return -ENOMEM;

	i2c_set_clientdata(i2c, rt5033);
	rt5033->dev = &i2c->dev;
	rt5033->irq = i2c->irq;
	rt5033->wakeup = true;

	rt5033->regmap = devm_regmap_init_i2c(i2c, &rt5033_regmap_config);
	if (IS_ERR(rt5033->regmap)) {
		dev_err(&i2c->dev, "Failed to allocate register map.\n");
		return PTR_ERR(rt5033->regmap);
	}

	ret = regmap_read(rt5033->regmap, RT5033_REG_DEVICE_ID, &dev_id);
	if (ret) {
		dev_err(&i2c->dev, "Device not found\n");
		return -ENODEV;
	}
	chip_rev = dev_id & RT5033_CHIP_REV_MASK;
	dev_info(&i2c->dev, "Device found (rev. %d)\n", chip_rev);

	ret = regmap_add_irq_chip(rt5033->regmap, rt5033->irq,
			IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
			0, &rt5033_irq_chip, &rt5033->irq_data);
	if (ret) {
		dev_err(&i2c->dev, "Failed to request IRQ %d: %d\n",
							rt5033->irq, ret);
		return ret;
	}

	ret = devm_mfd_add_devices(rt5033->dev, -1, rt5033_devs,
				   ARRAY_SIZE(rt5033_devs), NULL, 0,
				   regmap_irq_get_domain(rt5033->irq_data));
	if (ret < 0) {
		dev_err(&i2c->dev, "Failed to add RT5033 child devices.\n");
		return ret;
	}

	device_init_wakeup(rt5033->dev, rt5033->wakeup);

	return 0;
}

static const struct i2c_device_id rt5033_i2c_id[] = {
	{ "rt5033", },
	{ }
};
MODULE_DEVICE_TABLE(i2c, rt5033_i2c_id);

static const struct of_device_id rt5033_dt_match[] = {
	{ .compatible = "richtek,rt5033", },
	{ }
};
MODULE_DEVICE_TABLE(of, rt5033_dt_match);

static struct i2c_driver rt5033_driver = {
	.driver = {
		.name = "rt5033",
		.of_match_table = rt5033_dt_match,
	},
	.probe = rt5033_i2c_probe,
	.id_table = rt5033_i2c_id,
};
module_i2c_driver(rt5033_driver);

MODULE_DESCRIPTION("Richtek RT5033 multi-function core driver");
MODULE_AUTHOR("Beomho Seo <beomho.seo@samsung.com>");
MODULE_LICENSE("GPL");
Commit	Line	Data
d925da5c	1	// SPDX-License-Identifier: GPL-2.0-only
0b271258 BS	2	/*
	3	* MFD core driver for the Richtek RT5033.
	4	*
	5	* RT5033 comprises multiple sub-devices switcing charger, fuel gauge,
	6	* flash LED, current source, LDO and BUCK regulators.
	7	*
	8	* Copyright (C) 2014 Samsung Electronics, Co., Ltd.
	9	* Author: Beomho Seo <beomho.seo@samsung.com>
0b271258 BS	10	*/
	11
	12	#include <linux/err.h>
dc0c386e	13	#include <linux/mod_devicetable.h>
0b271258 BS	14	#include <linux/module.h>
0b271258 BS	15	#include <linux/interrupt.h>
0b271258 BS	16	#include <linux/mfd/core.h>
	17	#include <linux/mfd/rt5033.h>
	18	#include <linux/mfd/rt5033-private.h>
	19
	20	static const struct regmap_irq rt5033_irqs[] = {
	21	{ .mask = RT5033_PMIC_IRQ_BUCKOCP, },
	22	{ .mask = RT5033_PMIC_IRQ_BUCKLV, },
	23	{ .mask = RT5033_PMIC_IRQ_SAFELDOLV, },
	24	{ .mask = RT5033_PMIC_IRQ_LDOLV, },
	25	{ .mask = RT5033_PMIC_IRQ_OT, },
	26	{ .mask = RT5033_PMIC_IRQ_VDDA_UV, },
	27	};
	28
	29	static const struct regmap_irq_chip rt5033_irq_chip = {
	30	.name = "rt5033",
	31	.status_base = RT5033_REG_PMIC_IRQ_STAT,
4627ecec	32	.unmask_base = RT5033_REG_PMIC_IRQ_CTRL,
0b271258 BS	33	.num_regs = 1,
	34	.irqs = rt5033_irqs,
	35	.num_irqs = ARRAY_SIZE(rt5033_irqs),
	36	};
	37
	38	static const struct mfd_cell rt5033_devs[] = {
	39	{ .name = "rt5033-regulator", },
	40	{
	41	.name = "rt5033-charger",
	42	.of_compatible = "richtek,rt5033-charger",
b487c17d IK	43	}, {
	44	.name = "rt5033-led",
	45	.of_compatible = "richtek,rt5033-led",
0b271258 BS	46	},
	47	};
	48
	49	static const struct regmap_config rt5033_regmap_config = {
	50	.reg_bits = 8,
	51	.val_bits = 8,
	52	.max_register = RT5033_REG_END,
	53	};
	54
e46b578c	55	static int rt5033_i2c_probe(struct i2c_client *i2c)
0b271258 BS	56	{
0b271258 BS	57	struct rt5033_dev *rt5033;
c4747d7c	58	unsigned int dev_id, chip_rev;
0b271258 BS	59	int ret;
	60
	61	rt5033 = devm_kzalloc(&i2c->dev, sizeof(*rt5033), GFP_KERNEL);
	62	if (!rt5033)
	63	return -ENOMEM;
	64
	65	i2c_set_clientdata(i2c, rt5033);
	66	rt5033->dev = &i2c->dev;
	67	rt5033->irq = i2c->irq;
	68	rt5033->wakeup = true;
	69
	70	rt5033->regmap = devm_regmap_init_i2c(i2c, &rt5033_regmap_config);
	71	if (IS_ERR(rt5033->regmap)) {
	72	dev_err(&i2c->dev, "Failed to allocate register map.\n");
	73	return PTR_ERR(rt5033->regmap);
	74	}
	75
	76	ret = regmap_read(rt5033->regmap, RT5033_REG_DEVICE_ID, &dev_id);
	77	if (ret) {
	78	dev_err(&i2c->dev, "Device not found\n");
	79	return -ENODEV;
	80	}
c4747d7c JH	81	chip_rev = dev_id & RT5033_CHIP_REV_MASK;
c4747d7c JH	82	dev_info(&i2c->dev, "Device found (rev. %d)\n", chip_rev);
0b271258 BS	83
	84	ret = regmap_add_irq_chip(rt5033->regmap, rt5033->irq,
	85	IRQF_TRIGGER_FALLING \| IRQF_ONESHOT,
	86	0, &rt5033_irq_chip, &rt5033->irq_data);
	87	if (ret) {
	88	dev_err(&i2c->dev, "Failed to request IRQ %d: %d\n",
	89	rt5033->irq, ret);
	90	return ret;
	91	}
	92
6b719eba LD	93	ret = devm_mfd_add_devices(rt5033->dev, -1, rt5033_devs,
	94	ARRAY_SIZE(rt5033_devs), NULL, 0,
	95	regmap_irq_get_domain(rt5033->irq_data));
0b271258 BS	96	if (ret < 0) {
	97	dev_err(&i2c->dev, "Failed to add RT5033 child devices.\n");
	98	return ret;
	99	}
	100
	101	device_init_wakeup(rt5033->dev, rt5033->wakeup);
	102
	103	return 0;
	104	}
	105
0b271258 BS	106	static const struct i2c_device_id rt5033_i2c_id[] = {
	107	{ "rt5033", },
	108	{ }
	109	};
	110	MODULE_DEVICE_TABLE(i2c, rt5033_i2c_id);
	111
	112	static const struct of_device_id rt5033_dt_match[] = {
	113	{ .compatible = "richtek,rt5033", },
	114	{ }
	115	};
4895e493	116	MODULE_DEVICE_TABLE(of, rt5033_dt_match);
0b271258 BS	117
	118	static struct i2c_driver rt5033_driver = {
	119	.driver = {
	120	.name = "rt5033",
a232bcd2	121	.of_match_table = rt5033_dt_match,
0b271258	122	},
9816d859	123	.probe = rt5033_i2c_probe,
0b271258 BS	124	.id_table = rt5033_i2c_id,
	125	};
	126	module_i2c_driver(rt5033_driver);
	127
0b271258 BS	128	MODULE_DESCRIPTION("Richtek RT5033 multi-function core driver");
	129	MODULE_AUTHOR("Beomho Seo <beomho.seo@samsung.com>");
	130	MODULE_LICENSE("GPL");