[mirror_ubuntu-hirsute-kernel.git] / drivers / mfd / rohm-bd718x7.c

// SPDX-License-Identifier: GPL-2.0-or-later
//
// Copyright (C) 2018 ROHM Semiconductors
//
// ROHM BD71837MWV and BD71847MWV PMIC driver
//
// Datasheet for BD71837MWV available from
// https://www.rohm.com/datasheet/BD71837MWV/bd71837mwv-e

#include <linux/gpio_keys.h>
#include <linux/i2c.h>
#include <linux/input.h>
#include <linux/interrupt.h>
#include <linux/mfd/rohm-bd718x7.h>
#include <linux/mfd/core.h>
#include <linux/module.h>
#include <linux/of_device.h>
#include <linux/regmap.h>
#include <linux/types.h>

static struct gpio_keys_button button = {
	.code = KEY_POWER,
	.gpio = -1,
	.type = EV_KEY,
};

static struct gpio_keys_platform_data bd718xx_powerkey_data = {
	.buttons = &button,
	.nbuttons = 1,
	.name = "bd718xx-pwrkey",
};

static struct mfd_cell bd718xx_mfd_cells[] = {
	{
		.name = "gpio-keys",
		.platform_data = &bd718xx_powerkey_data,
		.pdata_size = sizeof(bd718xx_powerkey_data),
	},
	{ .name = "bd718xx-clk", },
	{ .name = "bd718xx-pmic", },
};

static const struct regmap_irq bd718xx_irqs[] = {
	REGMAP_IRQ_REG(BD718XX_INT_SWRST, 0, BD718XX_INT_SWRST_MASK),
	REGMAP_IRQ_REG(BD718XX_INT_PWRBTN_S, 0, BD718XX_INT_PWRBTN_S_MASK),
	REGMAP_IRQ_REG(BD718XX_INT_PWRBTN_L, 0, BD718XX_INT_PWRBTN_L_MASK),
	REGMAP_IRQ_REG(BD718XX_INT_PWRBTN, 0, BD718XX_INT_PWRBTN_MASK),
	REGMAP_IRQ_REG(BD718XX_INT_WDOG, 0, BD718XX_INT_WDOG_MASK),
	REGMAP_IRQ_REG(BD718XX_INT_ON_REQ, 0, BD718XX_INT_ON_REQ_MASK),
	REGMAP_IRQ_REG(BD718XX_INT_STBY_REQ, 0, BD718XX_INT_STBY_REQ_MASK),
};

static struct regmap_irq_chip bd718xx_irq_chip = {
	.name = "bd718xx-irq",
	.irqs = bd718xx_irqs,
	.num_irqs = ARRAY_SIZE(bd718xx_irqs),
	.num_regs = 1,
	.irq_reg_stride = 1,
	.status_base = BD718XX_REG_IRQ,
	.mask_base = BD718XX_REG_MIRQ,
	.ack_base = BD718XX_REG_IRQ,
	.init_ack_masked = true,
	.mask_invert = false,
};

static const struct regmap_range pmic_status_range = {
	.range_min = BD718XX_REG_IRQ,
	.range_max = BD718XX_REG_POW_STATE,
};

static const struct regmap_access_table volatile_regs = {
	.yes_ranges = &pmic_status_range,
	.n_yes_ranges = 1,
};

static const struct regmap_config bd718xx_regmap_config = {
	.reg_bits = 8,
	.val_bits = 8,
	.volatile_table = &volatile_regs,
	.max_register = BD718XX_MAX_REGISTER - 1,
	.cache_type = REGCACHE_RBTREE,
};

static int bd718xx_init_press_duration(struct bd718xx *bd718xx)
{
	struct device* dev = bd718xx->chip.dev;
	u32 short_press_ms, long_press_ms;
	u32 short_press_value, long_press_value;
	int ret;

	ret = of_property_read_u32(dev->of_node, "rohm,short-press-ms",
				   &short_press_ms);
	if (!ret) {
		short_press_value = min(15u, (short_press_ms + 250) / 500);
		ret = regmap_update_bits(bd718xx->chip.regmap,
					 BD718XX_REG_PWRONCONFIG0,
					 BD718XX_PWRBTN_PRESS_DURATION_MASK,
					 short_press_value);
		if (ret) {
			dev_err(dev, "Failed to init pwron short press\n");
			return ret;
		}
	}

	ret = of_property_read_u32(dev->of_node, "rohm,long-press-ms",
				   &long_press_ms);
	if (!ret) {
		long_press_value = min(15u, (long_press_ms + 500) / 1000);
		ret = regmap_update_bits(bd718xx->chip.regmap,
					 BD718XX_REG_PWRONCONFIG1,
					 BD718XX_PWRBTN_PRESS_DURATION_MASK,
					 long_press_value);
		if (ret) {
			dev_err(dev, "Failed to init pwron long press\n");
			return ret;
		}
	}

	return 0;
}

static int bd718xx_i2c_probe(struct i2c_client *i2c,
			    const struct i2c_device_id *id)
{
	struct bd718xx *bd718xx;
	int ret;

	if (!i2c->irq) {
		dev_err(&i2c->dev, "No IRQ configured\n");
		return -EINVAL;
	}

	bd718xx = devm_kzalloc(&i2c->dev, sizeof(struct bd718xx), GFP_KERNEL);

	if (!bd718xx)
		return -ENOMEM;

	bd718xx->chip_irq = i2c->irq;
	bd718xx->chip.chip_type = (unsigned int)(uintptr_t)
				of_device_get_match_data(&i2c->dev);
	bd718xx->chip.dev = &i2c->dev;
	dev_set_drvdata(&i2c->dev, bd718xx);

	bd718xx->chip.regmap = devm_regmap_init_i2c(i2c,
						    &bd718xx_regmap_config);
	if (IS_ERR(bd718xx->chip.regmap)) {
		dev_err(&i2c->dev, "regmap initialization failed\n");
		return PTR_ERR(bd718xx->chip.regmap);
	}

	ret = devm_regmap_add_irq_chip(&i2c->dev, bd718xx->chip.regmap,
				       bd718xx->chip_irq, IRQF_ONESHOT, 0,
				       &bd718xx_irq_chip, &bd718xx->irq_data);
	if (ret) {
		dev_err(&i2c->dev, "Failed to add irq_chip\n");
		return ret;
	}

	ret = bd718xx_init_press_duration(bd718xx);
	if (ret)
		return ret;

	ret = regmap_irq_get_virq(bd718xx->irq_data, BD718XX_INT_PWRBTN_S);

	if (ret < 0) {
		dev_err(&i2c->dev, "Failed to get the IRQ\n");
		return ret;
	}

	button.irq = ret;

	ret = devm_mfd_add_devices(bd718xx->chip.dev, PLATFORM_DEVID_AUTO,
				   bd718xx_mfd_cells,
				   ARRAY_SIZE(bd718xx_mfd_cells), NULL, 0,
				   regmap_irq_get_domain(bd718xx->irq_data));
	if (ret)
		dev_err(&i2c->dev, "Failed to create subdevices\n");

	return ret;
}

static const struct of_device_id bd718xx_of_match[] = {
	{
		.compatible = "rohm,bd71837",
		.data = (void *)ROHM_CHIP_TYPE_BD71837,
	},
	{
		.compatible = "rohm,bd71847",
		.data = (void *)ROHM_CHIP_TYPE_BD71847,
	},
	{ }
};
MODULE_DEVICE_TABLE(of, bd718xx_of_match);

static struct i2c_driver bd718xx_i2c_driver = {
	.driver = {
		.name = "rohm-bd718x7",
		.of_match_table = bd718xx_of_match,
	},
	.probe = bd718xx_i2c_probe,
};

static int __init bd718xx_i2c_init(void)
{
	return i2c_add_driver(&bd718xx_i2c_driver);
}

/* Initialise early so consumer devices can complete system boot */
subsys_initcall(bd718xx_i2c_init);

static void __exit bd718xx_i2c_exit(void)
{
	i2c_del_driver(&bd718xx_i2c_driver);
}
module_exit(bd718xx_i2c_exit);

MODULE_AUTHOR("Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>");
MODULE_DESCRIPTION("ROHM BD71837/BD71847 Power Management IC driver");
MODULE_LICENSE("GPL");
Commit	Line	Data
30107fa6 MV	1	// SPDX-License-Identifier: GPL-2.0-or-later
	2	//
	3	// Copyright (C) 2018 ROHM Semiconductors
	4	//
dd2be639	5	// ROHM BD71837MWV and BD71847MWV PMIC driver
30107fa6	6	//
dd2be639	7	// Datasheet for BD71837MWV available from
30107fa6 MV	8	// https://www.rohm.com/datasheet/BD71837MWV/bd71837mwv-e
30107fa6 MV	9
494edd26	10	#include <linux/gpio_keys.h>
30107fa6 MV	11	#include <linux/i2c.h>
	12	#include <linux/input.h>
	13	#include <linux/interrupt.h>
	14	#include <linux/mfd/rohm-bd718x7.h>
	15	#include <linux/mfd/core.h>
	16	#include <linux/module.h>
494edd26	17	#include <linux/of_device.h>
30107fa6	18	#include <linux/regmap.h>
494edd26	19	#include <linux/types.h>
30107fa6 MV	20
	21	static struct gpio_keys_button button = {
	22	.code = KEY_POWER,
	23	.gpio = -1,
	24	.type = EV_KEY,
	25	};
	26
	27	static struct gpio_keys_platform_data bd718xx_powerkey_data = {
	28	.buttons = &button,
	29	.nbuttons = 1,
	30	.name = "bd718xx-pwrkey",
	31	};
	32
dd2be639	33	static struct mfd_cell bd718xx_mfd_cells[] = {
30107fa6 MV	34	{
	35	.name = "gpio-keys",
	36	.platform_data = &bd718xx_powerkey_data,
	37	.pdata_size = sizeof(bd718xx_powerkey_data),
	38	},
494edd26 MV	39	{ .name = "bd718xx-clk", },
494edd26 MV	40	{ .name = "bd718xx-pmic", },
30107fa6 MV	41	};
30107fa6 MV	42
dd2be639 MV	43	static const struct regmap_irq bd718xx_irqs[] = {
	44	REGMAP_IRQ_REG(BD718XX_INT_SWRST, 0, BD718XX_INT_SWRST_MASK),
	45	REGMAP_IRQ_REG(BD718XX_INT_PWRBTN_S, 0, BD718XX_INT_PWRBTN_S_MASK),
	46	REGMAP_IRQ_REG(BD718XX_INT_PWRBTN_L, 0, BD718XX_INT_PWRBTN_L_MASK),
	47	REGMAP_IRQ_REG(BD718XX_INT_PWRBTN, 0, BD718XX_INT_PWRBTN_MASK),
	48	REGMAP_IRQ_REG(BD718XX_INT_WDOG, 0, BD718XX_INT_WDOG_MASK),
	49	REGMAP_IRQ_REG(BD718XX_INT_ON_REQ, 0, BD718XX_INT_ON_REQ_MASK),
	50	REGMAP_IRQ_REG(BD718XX_INT_STBY_REQ, 0, BD718XX_INT_STBY_REQ_MASK),
30107fa6 MV	51	};
30107fa6 MV	52
dd2be639 MV	53	static struct regmap_irq_chip bd718xx_irq_chip = {
	54	.name = "bd718xx-irq",
	55	.irqs = bd718xx_irqs,
	56	.num_irqs = ARRAY_SIZE(bd718xx_irqs),
30107fa6 MV	57	.num_regs = 1,
30107fa6 MV	58	.irq_reg_stride = 1,
494edd26 MV	59	.status_base = BD718XX_REG_IRQ,
	60	.mask_base = BD718XX_REG_MIRQ,
	61	.ack_base = BD718XX_REG_IRQ,
30107fa6 MV	62	.init_ack_masked = true,
	63	.mask_invert = false,
	64	};
	65
	66	static const struct regmap_range pmic_status_range = {
494edd26 MV	67	.range_min = BD718XX_REG_IRQ,
494edd26 MV	68	.range_max = BD718XX_REG_POW_STATE,
30107fa6 MV	69	};
	70
	71	static const struct regmap_access_table volatile_regs = {
	72	.yes_ranges = &pmic_status_range,
	73	.n_yes_ranges = 1,
	74	};
	75
dd2be639	76	static const struct regmap_config bd718xx_regmap_config = {
30107fa6 MV	77	.reg_bits = 8,
	78	.val_bits = 8,
	79	.volatile_table = &volatile_regs,
494edd26	80	.max_register = BD718XX_MAX_REGISTER - 1,
30107fa6 MV	81	.cache_type = REGCACHE_RBTREE,
	82	};
	83
e25547f8 LC	84	static int bd718xx_init_press_duration(struct bd718xx *bd718xx)
	85	{
	86	struct device* dev = bd718xx->chip.dev;
	87	u32 short_press_ms, long_press_ms;
	88	u32 short_press_value, long_press_value;
	89	int ret;
	90
	91	ret = of_property_read_u32(dev->of_node, "rohm,short-press-ms",
	92	&short_press_ms);
	93	if (!ret) {
	94	short_press_value = min(15u, (short_press_ms + 250) / 500);
	95	ret = regmap_update_bits(bd718xx->chip.regmap,
	96	BD718XX_REG_PWRONCONFIG0,
	97	BD718XX_PWRBTN_PRESS_DURATION_MASK,
	98	short_press_value);
	99	if (ret) {
	100	dev_err(dev, "Failed to init pwron short press\n");
	101	return ret;
	102	}
	103	}
	104
	105	ret = of_property_read_u32(dev->of_node, "rohm,long-press-ms",
	106	&long_press_ms);
	107	if (!ret) {
	108	long_press_value = min(15u, (long_press_ms + 500) / 1000);
	109	ret = regmap_update_bits(bd718xx->chip.regmap,
	110	BD718XX_REG_PWRONCONFIG1,
	111	BD718XX_PWRBTN_PRESS_DURATION_MASK,
	112	long_press_value);
	113	if (ret) {
	114	dev_err(dev, "Failed to init pwron long press\n");
	115	return ret;
	116	}
	117	}
	118
	119	return 0;
	120	}
	121
dd2be639	122	static int bd718xx_i2c_probe(struct i2c_client *i2c,
30107fa6 MV	123	const struct i2c_device_id *id)
30107fa6 MV	124	{
dd2be639	125	struct bd718xx *bd718xx;
494edd26 MV	126	int ret;
	127
	128	if (!i2c->irq) {
	129	dev_err(&i2c->dev, "No IRQ configured\n");
	130	return -EINVAL;
	131	}
30107fa6	132
dd2be639	133	bd718xx = devm_kzalloc(&i2c->dev, sizeof(struct bd718xx), GFP_KERNEL);
30107fa6	134
dd2be639	135	if (!bd718xx)
30107fa6 MV	136	return -ENOMEM;
30107fa6 MV	137
dd2be639	138	bd718xx->chip_irq = i2c->irq;
2a6a7aac	139	bd718xx->chip.chip_type = (unsigned int)(uintptr_t)
494edd26	140	of_device_get_match_data(&i2c->dev);
2a6a7aac	141	bd718xx->chip.dev = &i2c->dev;
dd2be639	142	dev_set_drvdata(&i2c->dev, bd718xx);
30107fa6	143
2a6a7aac MV	144	bd718xx->chip.regmap = devm_regmap_init_i2c(i2c,
	145	&bd718xx_regmap_config);
	146	if (IS_ERR(bd718xx->chip.regmap)) {
30107fa6	147	dev_err(&i2c->dev, "regmap initialization failed\n");
2a6a7aac	148	return PTR_ERR(bd718xx->chip.regmap);
30107fa6 MV	149	}
30107fa6 MV	150
2a6a7aac	151	ret = devm_regmap_add_irq_chip(&i2c->dev, bd718xx->chip.regmap,
dd2be639 MV	152	bd718xx->chip_irq, IRQF_ONESHOT, 0,
dd2be639 MV	153	&bd718xx_irq_chip, &bd718xx->irq_data);
30107fa6 MV	154	if (ret) {
	155	dev_err(&i2c->dev, "Failed to add irq_chip\n");
	156	return ret;
	157	}
	158
e25547f8 LC	159	ret = bd718xx_init_press_duration(bd718xx);
	160	if (ret)
	161	return ret;
	162
dd2be639	163	ret = regmap_irq_get_virq(bd718xx->irq_data, BD718XX_INT_PWRBTN_S);
30107fa6 MV	164
	165	if (ret < 0) {
	166	dev_err(&i2c->dev, "Failed to get the IRQ\n");
	167	return ret;
	168	}
	169
	170	button.irq = ret;
	171
2a6a7aac	172	ret = devm_mfd_add_devices(bd718xx->chip.dev, PLATFORM_DEVID_AUTO,
dd2be639 MV	173	bd718xx_mfd_cells,
	174	ARRAY_SIZE(bd718xx_mfd_cells), NULL, 0,
	175	regmap_irq_get_domain(bd718xx->irq_data));
30107fa6 MV	176	if (ret)
	177	dev_err(&i2c->dev, "Failed to create subdevices\n");
	178
	179	return ret;
	180	}
	181
dd2be639	182	static const struct of_device_id bd718xx_of_match[] = {
494edd26 MV	183	{
494edd26 MV	184	.compatible = "rohm,bd71837",
2a6a7aac	185	.data = (void *)ROHM_CHIP_TYPE_BD71837,
494edd26 MV	186	},
	187	{
	188	.compatible = "rohm,bd71847",
2a6a7aac	189	.data = (void *)ROHM_CHIP_TYPE_BD71847,
494edd26	190	},
30107fa6 MV	191	{ }
30107fa6 MV	192	};
dd2be639	193	MODULE_DEVICE_TABLE(of, bd718xx_of_match);
30107fa6	194
dd2be639	195	static struct i2c_driver bd718xx_i2c_driver = {
30107fa6 MV	196	.driver = {
30107fa6 MV	197	.name = "rohm-bd718x7",
dd2be639	198	.of_match_table = bd718xx_of_match,
30107fa6	199	},
dd2be639	200	.probe = bd718xx_i2c_probe,
30107fa6 MV	201	};
30107fa6 MV	202
dd2be639	203	static int __init bd718xx_i2c_init(void)
30107fa6	204	{
dd2be639	205	return i2c_add_driver(&bd718xx_i2c_driver);
30107fa6 MV	206	}
	207
	208	/* Initialise early so consumer devices can complete system boot */
dd2be639	209	subsys_initcall(bd718xx_i2c_init);
30107fa6	210
dd2be639	211	static void __exit bd718xx_i2c_exit(void)
30107fa6	212	{
dd2be639	213	i2c_del_driver(&bd718xx_i2c_driver);
30107fa6	214	}
dd2be639	215	module_exit(bd718xx_i2c_exit);
30107fa6 MV	216
30107fa6 MV	217	MODULE_AUTHOR("Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>");
dd2be639	218	MODULE_DESCRIPTION("ROHM BD71837/BD71847 Power Management IC driver");
30107fa6	219	MODULE_LICENSE("GPL");