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/module.h>
 14#include <linux/interrupt.h>
 15#include <linux/of_device.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	.mask_base	= RT5033_REG_PMIC_IRQ_CTRL,
 33	.mask_invert	= true,
 34	.num_regs	= 1,
 35	.irqs		= rt5033_irqs,
 36	.num_irqs	= ARRAY_SIZE(rt5033_irqs),
 37};
 38
 39static const struct mfd_cell rt5033_devs[] = {
 40	{ .name = "rt5033-regulator", },
 41	{
 42		.name = "rt5033-charger",
 43		.of_compatible = "richtek,rt5033-charger",
 44	}, {
 45		.name = "rt5033-battery",
 46		.of_compatible = "richtek,rt5033-battery",
 47	}, {
 48		.name = "rt5033-led",
 49		.of_compatible = "richtek,rt5033-led",
 50	},
 51};
 52
 53static const struct regmap_config rt5033_regmap_config = {
 54	.reg_bits	= 8,
 55	.val_bits	= 8,
 56	.max_register	= RT5033_REG_END,
 57};
 58
 59static int rt5033_i2c_probe(struct i2c_client *i2c,
 60				const struct i2c_device_id *id)
 61{
 62	struct rt5033_dev *rt5033;
 63	unsigned int dev_id;
 64	int ret;
 65
 66	rt5033 = devm_kzalloc(&i2c->dev, sizeof(*rt5033), GFP_KERNEL);
 67	if (!rt5033)
 68		return -ENOMEM;
 69
 70	i2c_set_clientdata(i2c, rt5033);
 71	rt5033->dev = &i2c->dev;
 72	rt5033->irq = i2c->irq;
 73	rt5033->wakeup = true;
 74
 75	rt5033->regmap = devm_regmap_init_i2c(i2c, &rt5033_regmap_config);
 76	if (IS_ERR(rt5033->regmap)) {
 77		dev_err(&i2c->dev, "Failed to allocate register map.\n");
 78		return PTR_ERR(rt5033->regmap);
 79	}
 80
 81	ret = regmap_read(rt5033->regmap, RT5033_REG_DEVICE_ID, &dev_id);
 82	if (ret) {
 83		dev_err(&i2c->dev, "Device not found\n");
 84		return -ENODEV;
 85	}
 86	dev_info(&i2c->dev, "Device found Device ID: %04x\n", dev_id);
 87
 88	ret = regmap_add_irq_chip(rt5033->regmap, rt5033->irq,
 89			IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
 90			0, &rt5033_irq_chip, &rt5033->irq_data);
 91	if (ret) {
 92		dev_err(&i2c->dev, "Failed to request IRQ %d: %d\n",
 93							rt5033->irq, ret);
 94		return ret;
 95	}
 96
 97	ret = devm_mfd_add_devices(rt5033->dev, -1, rt5033_devs,
 98				   ARRAY_SIZE(rt5033_devs), NULL, 0,
 99				   regmap_irq_get_domain(rt5033->irq_data));
100	if (ret < 0) {
101		dev_err(&i2c->dev, "Failed to add RT5033 child devices.\n");
102		return ret;
103	}
104
105	device_init_wakeup(rt5033->dev, rt5033->wakeup);
106
107	return 0;
108}
109
110static const struct i2c_device_id rt5033_i2c_id[] = {
111	{ "rt5033", },
112	{ }
113};
114MODULE_DEVICE_TABLE(i2c, rt5033_i2c_id);
115
116static const struct of_device_id rt5033_dt_match[] = {
117	{ .compatible = "richtek,rt5033", },
118	{ }
119};
120MODULE_DEVICE_TABLE(of, rt5033_dt_match);
121
122static struct i2c_driver rt5033_driver = {
123	.driver = {
124		.name = "rt5033",
125		.of_match_table = of_match_ptr(rt5033_dt_match),
126	},
127	.probe = rt5033_i2c_probe,
128	.id_table = rt5033_i2c_id,
129};
130module_i2c_driver(rt5033_driver);
131
132MODULE_DESCRIPTION("Richtek RT5033 multi-function core driver");
133MODULE_AUTHOR("Beomho Seo <beomho.seo@samsung.com>");
134MODULE_LICENSE("GPL");