[linux-block.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 bd71837_mfd_cells[] = {
	{
		.name = "gpio-keys",
		.platform_data = &bd718xx_powerkey_data,
		.pdata_size = sizeof(bd718xx_powerkey_data),
	},
	{ .name = "bd71837-clk", },
	{ .name = "bd71837-pmic", },
};

static struct mfd_cell bd71847_mfd_cells[] = {
	{
		.name = "gpio-keys",
		.platform_data = &bd718xx_powerkey_data,
		.pdata_size = sizeof(bd718xx_powerkey_data),
	},
	{ .name = "bd71847-clk", },
	{ .name = "bd71847-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,
};

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 regmap *regmap,
				       struct device *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(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(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)
{
	struct regmap *regmap;
	struct regmap_irq_chip_data *irq_data;
	int ret;
	unsigned int chip_type;
	struct mfd_cell *mfd;
	int cells;

	if (!i2c->irq) {
		dev_err(&i2c->dev, "No IRQ configured\n");
		return -EINVAL;
	}
	chip_type = (unsigned int)(uintptr_t)
		    of_device_get_match_data(&i2c->dev);
	switch (chip_type) {
	case ROHM_CHIP_TYPE_BD71837:
		mfd = bd71837_mfd_cells;
		cells = ARRAY_SIZE(bd71837_mfd_cells);
		break;
	case ROHM_CHIP_TYPE_BD71847:
		mfd = bd71847_mfd_cells;
		cells = ARRAY_SIZE(bd71847_mfd_cells);
		break;
	default:
		dev_err(&i2c->dev, "Unknown device type");
		return -EINVAL;
	}

	regmap = devm_regmap_init_i2c(i2c, &bd718xx_regmap_config);
	if (IS_ERR(regmap))
		return dev_err_probe(&i2c->dev, PTR_ERR(regmap),
				     "regmap initialization failed\n");

	ret = devm_regmap_add_irq_chip(&i2c->dev, regmap, i2c->irq,
				       IRQF_ONESHOT, 0, &bd718xx_irq_chip,
				       &irq_data);
	if (ret)
		return dev_err_probe(&i2c->dev, ret, "Failed to add irq_chip\n");

	ret = bd718xx_init_press_duration(regmap, &i2c->dev);
	if (ret)
		return ret;

	ret = regmap_irq_get_virq(irq_data, BD718XX_INT_PWRBTN_S);

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

	button.irq = ret;

	ret = devm_mfd_add_devices(&i2c->dev, PLATFORM_DEVID_AUTO,
				   mfd, cells, NULL, 0,
				   regmap_irq_get_domain(irq_data));
	if (ret)
		dev_err_probe(&i2c->dev, ret, "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,
	},
	{
		.compatible = "rohm,bd71850",
		.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_new = 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
1b1c26b2	33	static struct mfd_cell bd71837_mfd_cells[] = {
30107fa6 MV	34	{
	35	.name = "gpio-keys",
	36	.platform_data = &bd718xx_powerkey_data,
	37	.pdata_size = sizeof(bd718xx_powerkey_data),
	38	},
1b1c26b2 MV	39	{ .name = "bd71837-clk", },
	40	{ .name = "bd71837-pmic", },
	41	};
	42
	43	static struct mfd_cell bd71847_mfd_cells[] = {
	44	{
	45	.name = "gpio-keys",
	46	.platform_data = &bd718xx_powerkey_data,
	47	.pdata_size = sizeof(bd718xx_powerkey_data),
	48	},
	49	{ .name = "bd71847-clk", },
	50	{ .name = "bd71847-pmic", },
30107fa6 MV	51	};
30107fa6 MV	52
dd2be639 MV	53	static const struct regmap_irq bd718xx_irqs[] = {
	54	REGMAP_IRQ_REG(BD718XX_INT_SWRST, 0, BD718XX_INT_SWRST_MASK),
	55	REGMAP_IRQ_REG(BD718XX_INT_PWRBTN_S, 0, BD718XX_INT_PWRBTN_S_MASK),
	56	REGMAP_IRQ_REG(BD718XX_INT_PWRBTN_L, 0, BD718XX_INT_PWRBTN_L_MASK),
	57	REGMAP_IRQ_REG(BD718XX_INT_PWRBTN, 0, BD718XX_INT_PWRBTN_MASK),
	58	REGMAP_IRQ_REG(BD718XX_INT_WDOG, 0, BD718XX_INT_WDOG_MASK),
	59	REGMAP_IRQ_REG(BD718XX_INT_ON_REQ, 0, BD718XX_INT_ON_REQ_MASK),
	60	REGMAP_IRQ_REG(BD718XX_INT_STBY_REQ, 0, BD718XX_INT_STBY_REQ_MASK),
30107fa6 MV	61	};
30107fa6 MV	62
dd2be639 MV	63	static struct regmap_irq_chip bd718xx_irq_chip = {
	64	.name = "bd718xx-irq",
	65	.irqs = bd718xx_irqs,
	66	.num_irqs = ARRAY_SIZE(bd718xx_irqs),
30107fa6 MV	67	.num_regs = 1,
30107fa6 MV	68	.irq_reg_stride = 1,
494edd26 MV	69	.status_base = BD718XX_REG_IRQ,
	70	.mask_base = BD718XX_REG_MIRQ,
	71	.ack_base = BD718XX_REG_IRQ,
30107fa6	72	.init_ack_masked = true,
30107fa6 MV	73	};
	74
	75	static const struct regmap_range pmic_status_range = {
494edd26 MV	76	.range_min = BD718XX_REG_IRQ,
494edd26 MV	77	.range_max = BD718XX_REG_POW_STATE,
30107fa6 MV	78	};
	79
	80	static const struct regmap_access_table volatile_regs = {
	81	.yes_ranges = &pmic_status_range,
	82	.n_yes_ranges = 1,
	83	};
	84
dd2be639	85	static const struct regmap_config bd718xx_regmap_config = {
30107fa6 MV	86	.reg_bits = 8,
	87	.val_bits = 8,
	88	.volatile_table = &volatile_regs,
494edd26	89	.max_register = BD718XX_MAX_REGISTER - 1,
30107fa6 MV	90	.cache_type = REGCACHE_RBTREE,
	91	};
	92
316d0d92 MV	93	static int bd718xx_init_press_duration(struct regmap *regmap,
316d0d92 MV	94	struct device *dev)
e25547f8	95	{
e25547f8 LC	96	u32 short_press_ms, long_press_ms;
	97	u32 short_press_value, long_press_value;
	98	int ret;
	99
	100	ret = of_property_read_u32(dev->of_node, "rohm,short-press-ms",
	101	&short_press_ms);
	102	if (!ret) {
	103	short_press_value = min(15u, (short_press_ms + 250) / 500);
316d0d92	104	ret = regmap_update_bits(regmap, BD718XX_REG_PWRONCONFIG0,
e25547f8 LC	105	BD718XX_PWRBTN_PRESS_DURATION_MASK,
	106	short_press_value);
	107	if (ret) {
	108	dev_err(dev, "Failed to init pwron short press\n");
	109	return ret;
	110	}
	111	}
	112
	113	ret = of_property_read_u32(dev->of_node, "rohm,long-press-ms",
	114	&long_press_ms);
	115	if (!ret) {
	116	long_press_value = min(15u, (long_press_ms + 500) / 1000);
316d0d92	117	ret = regmap_update_bits(regmap, BD718XX_REG_PWRONCONFIG1,
e25547f8 LC	118	BD718XX_PWRBTN_PRESS_DURATION_MASK,
	119	long_press_value);
	120	if (ret) {
	121	dev_err(dev, "Failed to init pwron long press\n");
	122	return ret;
	123	}
	124	}
	125
	126	return 0;
	127	}
	128
6816c54b	129	static int bd718xx_i2c_probe(struct i2c_client *i2c)
30107fa6	130	{
316d0d92 MV	131	struct regmap *regmap;
316d0d92 MV	132	struct regmap_irq_chip_data *irq_data;
494edd26	133	int ret;
1b1c26b2 MV	134	unsigned int chip_type;
	135	struct mfd_cell *mfd;
	136	int cells;
494edd26 MV	137
	138	if (!i2c->irq) {
	139	dev_err(&i2c->dev, "No IRQ configured\n");
	140	return -EINVAL;
	141	}
1b1c26b2 MV	142	chip_type = (unsigned int)(uintptr_t)
	143	of_device_get_match_data(&i2c->dev);
	144	switch (chip_type) {
	145	case ROHM_CHIP_TYPE_BD71837:
	146	mfd = bd71837_mfd_cells;
	147	cells = ARRAY_SIZE(bd71837_mfd_cells);
	148	break;
	149	case ROHM_CHIP_TYPE_BD71847:
	150	mfd = bd71847_mfd_cells;
	151	cells = ARRAY_SIZE(bd71847_mfd_cells);
	152	break;
	153	default:
	154	dev_err(&i2c->dev, "Unknown device type");
	155	return -EINVAL;
	156	}
30107fa6	157
316d0d92	158	regmap = devm_regmap_init_i2c(i2c, &bd718xx_regmap_config);
cb83cb0d MV	159	if (IS_ERR(regmap))
	160	return dev_err_probe(&i2c->dev, PTR_ERR(regmap),
	161	"regmap initialization failed\n");
30107fa6	162
316d0d92 MV	163	ret = devm_regmap_add_irq_chip(&i2c->dev, regmap, i2c->irq,
	164	IRQF_ONESHOT, 0, &bd718xx_irq_chip,
	165	&irq_data);
cb83cb0d MV	166	if (ret)
cb83cb0d MV	167	return dev_err_probe(&i2c->dev, ret, "Failed to add irq_chip\n");
30107fa6	168
316d0d92	169	ret = bd718xx_init_press_duration(regmap, &i2c->dev);
e25547f8 LC	170	if (ret)
	171	return ret;
	172
316d0d92	173	ret = regmap_irq_get_virq(irq_data, BD718XX_INT_PWRBTN_S);
30107fa6	174
cb83cb0d MV	175	if (ret < 0)
cb83cb0d MV	176	return dev_err_probe(&i2c->dev, ret, "Failed to get the IRQ\n");
30107fa6 MV	177
	178	button.irq = ret;
	179
316d0d92	180	ret = devm_mfd_add_devices(&i2c->dev, PLATFORM_DEVID_AUTO,
1b1c26b2	181	mfd, cells, NULL, 0,
316d0d92	182	regmap_irq_get_domain(irq_data));
30107fa6	183	if (ret)
cb83cb0d	184	dev_err_probe(&i2c->dev, ret, "Failed to create subdevices\n");
30107fa6 MV	185
	186	return ret;
	187	}
	188
dd2be639	189	static const struct of_device_id bd718xx_of_match[] = {
494edd26 MV	190	{
494edd26 MV	191	.compatible = "rohm,bd71837",
2a6a7aac	192	.data = (void *)ROHM_CHIP_TYPE_BD71837,
494edd26 MV	193	},
	194	{
	195	.compatible = "rohm,bd71847",
2a6a7aac	196	.data = (void *)ROHM_CHIP_TYPE_BD71847,
494edd26	197	},
8c352e68 MV	198	{
	199	.compatible = "rohm,bd71850",
	200	.data = (void *)ROHM_CHIP_TYPE_BD71847,
	201	},
30107fa6 MV	202	{ }
30107fa6 MV	203	};
dd2be639	204	MODULE_DEVICE_TABLE(of, bd718xx_of_match);
30107fa6	205
dd2be639	206	static struct i2c_driver bd718xx_i2c_driver = {
30107fa6 MV	207	.driver = {
30107fa6 MV	208	.name = "rohm-bd718x7",
dd2be639	209	.of_match_table = bd718xx_of_match,
30107fa6	210	},
6816c54b	211	.probe_new = bd718xx_i2c_probe,
30107fa6 MV	212	};
30107fa6 MV	213
dd2be639	214	static int __init bd718xx_i2c_init(void)
30107fa6	215	{
dd2be639	216	return i2c_add_driver(&bd718xx_i2c_driver);
30107fa6 MV	217	}
	218
	219	/* Initialise early so consumer devices can complete system boot */
dd2be639	220	subsys_initcall(bd718xx_i2c_init);
30107fa6	221
dd2be639	222	static void __exit bd718xx_i2c_exit(void)
30107fa6	223	{
dd2be639	224	i2c_del_driver(&bd718xx_i2c_driver);
30107fa6	225	}
dd2be639	226	module_exit(bd718xx_i2c_exit);
30107fa6 MV	227
30107fa6 MV	228	MODULE_AUTHOR("Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>");
dd2be639	229	MODULE_DESCRIPTION("ROHM BD71837/BD71847 Power Management IC driver");
30107fa6	230	MODULE_LICENSE("GPL");