1// SPDX-License-Identifier: GPL-2.0-only
  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>
 10 */
 11
 12#include <linux/err.h>
 13#include <linux/mod_devicetable.h>
 14#include <linux/module.h>
 15#include <linux/interrupt.h>
 16#include <linux/mfd/core.h>
 17#include <linux/mfd/rt5033.h>
 18#include <linux/mfd/rt5033-private.h>
 19
 20static 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
 29static const struct regmap_irq_chip rt5033_irq_chip = {
 30	.name		= "rt5033",
 31	.status_base	= RT5033_REG_PMIC_IRQ_STAT,
 32	.unmask_base	= RT5033_REG_PMIC_IRQ_CTRL,
 33	.num_regs	= 1,
 34	.irqs		= rt5033_irqs,
 35	.num_irqs	= ARRAY_SIZE(rt5033_irqs),
 36};
 37
 38static const struct mfd_cell rt5033_devs[] = {
 39	{ .name = "rt5033-regulator", },
 40	{
 41		.name = "rt5033-charger",
 42		.of_compatible = "richtek,rt5033-charger",
 43	}, {
 44		.name = "rt5033-led",
 45		.of_compatible = "richtek,rt5033-led",
 46	},
 47};
 48
 49static const struct regmap_config rt5033_regmap_config = {
 50	.reg_bits	= 8,
 51	.val_bits	= 8,
 52	.max_register	= RT5033_REG_END,
 53};
 54
 55static int rt5033_i2c_probe(struct i2c_client *i2c)
 56{
 57	struct rt5033_dev *rt5033;
 58	unsigned int dev_id, chip_rev;
 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	}
 81	chip_rev = dev_id & RT5033_CHIP_REV_MASK;
 82	dev_info(&i2c->dev, "Device found (rev. %d)\n", chip_rev);
 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
 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));
 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
106static const struct i2c_device_id rt5033_i2c_id[] = {
107	{ "rt5033", },
108	{ }
109};
110MODULE_DEVICE_TABLE(i2c, rt5033_i2c_id);
111
112static const struct of_device_id rt5033_dt_match[] = {
113	{ .compatible = "richtek,rt5033", },
114	{ }
115};
116MODULE_DEVICE_TABLE(of, rt5033_dt_match);
117
118static struct i2c_driver rt5033_driver = {
119	.driver = {
120		.name = "rt5033",
121		.of_match_table = rt5033_dt_match,
122	},
123	.probe = rt5033_i2c_probe,
124	.id_table = rt5033_i2c_id,
125};
126module_i2c_driver(rt5033_driver);
127
128MODULE_DESCRIPTION("Richtek RT5033 multi-function core driver");
129MODULE_AUTHOR("Beomho Seo <beomho.seo@samsung.com>");
130MODULE_LICENSE("GPL");