[thirdparty/linux.git] / drivers / regulator / wm8994-regulator.c

// SPDX-License-Identifier: GPL-2.0+
//
// wm8994-regulator.c  --  Regulator driver for the WM8994
//
// Copyright 2009 Wolfson Microelectronics PLC.
//
// Author: Mark Brown <broonie@opensource.wolfsonmicro.com>

#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/bitops.h>
#include <linux/err.h>
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/gpio/consumer.h>
#include <linux/slab.h>

#include <linux/mfd/wm8994/core.h>
#include <linux/mfd/wm8994/registers.h>
#include <linux/mfd/wm8994/pdata.h>

struct wm8994_ldo {
	struct regulator_dev *regulator;
	struct wm8994 *wm8994;
	struct regulator_consumer_supply supply;
	struct regulator_init_data init_data;
};

#define WM8994_LDO1_MAX_SELECTOR 0x7
#define WM8994_LDO2_MAX_SELECTOR 0x3

static const struct regulator_ops wm8994_ldo1_ops = {
	.list_voltage = regulator_list_voltage_linear,
	.map_voltage = regulator_map_voltage_linear,
	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	.set_voltage_sel = regulator_set_voltage_sel_regmap,
};

static int wm8994_ldo2_list_voltage(struct regulator_dev *rdev,
				    unsigned int selector)
{
	struct wm8994_ldo *ldo = rdev_get_drvdata(rdev);

	if (selector > WM8994_LDO2_MAX_SELECTOR)
		return -EINVAL;

	switch (ldo->wm8994->type) {
	case WM8994:
		return (selector * 100000) + 900000;
	case WM8958:
		return (selector * 100000) + 1000000;
	case WM1811:
		switch (selector) {
		case 0:
			return -EINVAL;
		default:
			return (selector * 100000) + 950000;
		}
		break;
	default:
		return -EINVAL;
	}
}

static const struct regulator_ops wm8994_ldo2_ops = {
	.list_voltage = wm8994_ldo2_list_voltage,
	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	.set_voltage_sel = regulator_set_voltage_sel_regmap,
};

static const struct regulator_desc wm8994_ldo_desc[] = {
	{
		.name = "LDO1",
		.id = 1,
		.type = REGULATOR_VOLTAGE,
		.n_voltages = WM8994_LDO1_MAX_SELECTOR + 1,
		.vsel_reg = WM8994_LDO_1,
		.vsel_mask = WM8994_LDO1_VSEL_MASK,
		.ops = &wm8994_ldo1_ops,
		.min_uV = 2400000,
		.uV_step = 100000,
		.enable_time = 3000,
		.owner = THIS_MODULE,
	},
	{
		.name = "LDO2",
		.id = 2,
		.type = REGULATOR_VOLTAGE,
		.n_voltages = WM8994_LDO2_MAX_SELECTOR + 1,
		.vsel_reg = WM8994_LDO_2,
		.vsel_mask = WM8994_LDO2_VSEL_MASK,
		.ops = &wm8994_ldo2_ops,
		.enable_time = 3000,
		.owner = THIS_MODULE,
	},
};

static const struct regulator_consumer_supply wm8994_ldo_consumer[] = {
	{ .supply = "AVDD1" },
	{ .supply = "DCVDD" },
};

static const struct regulator_init_data wm8994_ldo_default[] = {
	{
		.constraints = {
			.valid_ops_mask = REGULATOR_CHANGE_STATUS,
		},
		.num_consumer_supplies = 1,
	},
	{
		.constraints = {
			.valid_ops_mask = REGULATOR_CHANGE_STATUS,
		},
		.num_consumer_supplies = 1,
	},
};

static int wm8994_ldo_probe(struct platform_device *pdev)
{
	struct wm8994 *wm8994 = dev_get_drvdata(pdev->dev.parent);
	struct wm8994_pdata *pdata = dev_get_platdata(wm8994->dev);
	int id = pdev->id % ARRAY_SIZE(pdata->ldo);
	struct regulator_config config = { };
	struct wm8994_ldo *ldo;
	struct gpio_desc *gpiod;
	int ret;

	dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1);

	ldo = devm_kzalloc(&pdev->dev, sizeof(struct wm8994_ldo), GFP_KERNEL);
	if (!ldo)
		return -ENOMEM;

	ldo->wm8994 = wm8994;
	ldo->supply = wm8994_ldo_consumer[id];
	ldo->supply.dev_name = dev_name(wm8994->dev);

	config.dev = wm8994->dev;
	config.driver_data = ldo;
	config.regmap = wm8994->regmap;
	config.init_data = &ldo->init_data;

	/*
	 * Look up LDO enable GPIO from the parent device node, we don't
	 * use devm because the regulator core will free the GPIO
	 */
	gpiod = gpiod_get_optional(pdev->dev.parent,
				   id ? "wlf,ldo2ena" : "wlf,ldo1ena",
				   GPIOD_OUT_LOW |
				   GPIOD_FLAGS_BIT_NONEXCLUSIVE);
	if (IS_ERR(gpiod))
		return PTR_ERR(gpiod);
	config.ena_gpiod = gpiod;

	/* Use default constraints if none set up */
	if (!pdata || !pdata->ldo[id].init_data || wm8994->dev->of_node) {
		dev_dbg(wm8994->dev, "Using default init data, supply %s %s\n",
			ldo->supply.dev_name, ldo->supply.supply);

		ldo->init_data = wm8994_ldo_default[id];
		ldo->init_data.consumer_supplies = &ldo->supply;
		if (!gpiod)
			ldo->init_data.constraints.valid_ops_mask = 0;
	} else {
		ldo->init_data = *pdata->ldo[id].init_data;
	}

	/*
	 * At this point the GPIO descriptor is handled over to the
	 * regulator core and we need not worry about it on the
	 * error path.
	 */
	ldo->regulator = devm_regulator_register(&pdev->dev,
						 &wm8994_ldo_desc[id],
						 &config);
	if (IS_ERR(ldo->regulator)) {
		ret = PTR_ERR(ldo->regulator);
		dev_err(wm8994->dev, "Failed to register LDO%d: %d\n",
			id + 1, ret);
		return ret;
	}

	platform_set_drvdata(pdev, ldo);

	return 0;
}

static struct platform_driver wm8994_ldo_driver = {
	.probe = wm8994_ldo_probe,
	.driver		= {
		.name	= "wm8994-ldo",
	},
};

module_platform_driver(wm8994_ldo_driver);

/* Module information */
MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
MODULE_DESCRIPTION("WM8994 LDO driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:wm8994-ldo");
Commit	Line	Data
e8d59d9a AL	1	// SPDX-License-Identifier: GPL-2.0+
	2	//
	3	// wm8994-regulator.c -- Regulator driver for the WM8994
	4	//
	5	// Copyright 2009 Wolfson Microelectronics PLC.
	6	//
	7	// Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
69dc16c3 MB	8
	9	#include <linux/module.h>
	10	#include <linux/moduleparam.h>
	11	#include <linux/init.h>
	12	#include <linux/bitops.h>
	13	#include <linux/err.h>
	14	#include <linux/platform_device.h>
	15	#include <linux/regulator/driver.h>
e3d27775	16	#include <linux/regulator/machine.h>
1d2f4681	17	#include <linux/gpio/consumer.h>
5a0e3ad6	18	#include <linux/slab.h>
69dc16c3 MB	19
	20	#include <linux/mfd/wm8994/core.h>
	21	#include <linux/mfd/wm8994/registers.h>
	22	#include <linux/mfd/wm8994/pdata.h>
	23
	24	struct wm8994_ldo {
69dc16c3 MB	25	struct regulator_dev *regulator;
69dc16c3 MB	26	struct wm8994 *wm8994;
e3d27775 MB	27	struct regulator_consumer_supply supply;
e3d27775 MB	28	struct regulator_init_data init_data;
69dc16c3 MB	29	};
	30
	31	#define WM8994_LDO1_MAX_SELECTOR 0x7
	32	#define WM8994_LDO2_MAX_SELECTOR 0x3
	33
b0d6dd3b	34	static const struct regulator_ops wm8994_ldo1_ops = {
f2d103ad AL	35	.list_voltage = regulator_list_voltage_linear,
f2d103ad AL	36	.map_voltage = regulator_map_voltage_linear,
633b6fcd MB	37	.get_voltage_sel = regulator_get_voltage_sel_regmap,
633b6fcd MB	38	.set_voltage_sel = regulator_set_voltage_sel_regmap,
69dc16c3 MB	39	};
	40
	41	static int wm8994_ldo2_list_voltage(struct regulator_dev *rdev,
	42	unsigned int selector)
	43	{
5a7743ed MB	44	struct wm8994_ldo *ldo = rdev_get_drvdata(rdev);
5a7743ed MB	45
69dc16c3 MB	46	if (selector > WM8994_LDO2_MAX_SELECTOR)
	47	return -EINVAL;
	48
5a7743ed MB	49	switch (ldo->wm8994->type) {
	50	case WM8994:
	51	return (selector * 100000) + 900000;
	52	case WM8958:
	53	return (selector * 100000) + 1000000;
a1ff89ef MB	54	case WM1811:
	55	switch (selector) {
	56	case 0:
	57	return -EINVAL;
	58	default:
	59	return (selector * 100000) + 950000;
	60	}
	61	break;
5a7743ed MB	62	default:
	63	return -EINVAL;
	64	}
69dc16c3 MB	65	}
69dc16c3 MB	66
b0d6dd3b	67	static const struct regulator_ops wm8994_ldo2_ops = {
69dc16c3	68	.list_voltage = wm8994_ldo2_list_voltage,
633b6fcd MB	69	.get_voltage_sel = regulator_get_voltage_sel_regmap,
633b6fcd MB	70	.set_voltage_sel = regulator_set_voltage_sel_regmap,
69dc16c3 MB	71	};
69dc16c3 MB	72
25e4d602	73	static const struct regulator_desc wm8994_ldo_desc[] = {
69dc16c3 MB	74	{
	75	.name = "LDO1",
	76	.id = 1,
	77	.type = REGULATOR_VOLTAGE,
	78	.n_voltages = WM8994_LDO1_MAX_SELECTOR + 1,
633b6fcd MB	79	.vsel_reg = WM8994_LDO_1,
633b6fcd MB	80	.vsel_mask = WM8994_LDO1_VSEL_MASK,
69dc16c3	81	.ops = &wm8994_ldo1_ops,
f2d103ad AL	82	.min_uV = 2400000,
f2d103ad AL	83	.uV_step = 100000,
00581b30	84	.enable_time = 3000,
69dc16c3 MB	85	.owner = THIS_MODULE,
	86	},
	87	{
	88	.name = "LDO2",
	89	.id = 2,
	90	.type = REGULATOR_VOLTAGE,
	91	.n_voltages = WM8994_LDO2_MAX_SELECTOR + 1,
633b6fcd MB	92	.vsel_reg = WM8994_LDO_2,
633b6fcd MB	93	.vsel_mask = WM8994_LDO2_VSEL_MASK,
69dc16c3	94	.ops = &wm8994_ldo2_ops,
00581b30	95	.enable_time = 3000,
69dc16c3 MB	96	.owner = THIS_MODULE,
	97	},
	98	};
	99
e3d27775 MB	100	static const struct regulator_consumer_supply wm8994_ldo_consumer[] = {
	101	{ .supply = "AVDD1" },
	102	{ .supply = "DCVDD" },
	103	};
	104
	105	static const struct regulator_init_data wm8994_ldo_default[] = {
	106	{
	107	.constraints = {
	108	.valid_ops_mask = REGULATOR_CHANGE_STATUS,
	109	},
	110	.num_consumer_supplies = 1,
	111	},
	112	{
	113	.constraints = {
	114	.valid_ops_mask = REGULATOR_CHANGE_STATUS,
	115	},
	116	.num_consumer_supplies = 1,
	117	},
	118	};
	119
a5023574	120	static int wm8994_ldo_probe(struct platform_device *pdev)
69dc16c3 MB	121	{
69dc16c3 MB	122	struct wm8994 *wm8994 = dev_get_drvdata(pdev->dev.parent);
dff91d0b	123	struct wm8994_pdata *pdata = dev_get_platdata(wm8994->dev);
69dc16c3	124	int id = pdev->id % ARRAY_SIZE(pdata->ldo);
c172708d	125	struct regulator_config config = { };
69dc16c3	126	struct wm8994_ldo *ldo;
1d2f4681	127	struct gpio_desc *gpiod;
69dc16c3 MB	128	int ret;
	129
	130	dev_dbg(&pdev->dev, "Probing LDO%d\n", id + 1);
	131
b9e0348f	132	ldo = devm_kzalloc(&pdev->dev, sizeof(struct wm8994_ldo), GFP_KERNEL);
4deaf85a	133	if (!ldo)
69dc16c3	134	return -ENOMEM;
69dc16c3 MB	135
69dc16c3 MB	136	ldo->wm8994 = wm8994;
e3d27775 MB	137	ldo->supply = wm8994_ldo_consumer[id];
e3d27775 MB	138	ldo->supply.dev_name = dev_name(wm8994->dev);
69dc16c3	139
5d0526ea	140	config.dev = wm8994->dev;
c172708d	141	config.driver_data = ldo;
633b6fcd	142	config.regmap = wm8994->regmap;
e3d27775	143	config.init_data = &ldo->init_data;
1d2f4681	144
466affa0 CK	145	/*
	146	* Look up LDO enable GPIO from the parent device node, we don't
	147	* use devm because the regulator core will free the GPIO
	148	*/
	149	gpiod = gpiod_get_optional(pdev->dev.parent,
	150	id ? "wlf,ldo2ena" : "wlf,ldo1ena",
	151	GPIOD_OUT_LOW \|
	152	GPIOD_FLAGS_BIT_NONEXCLUSIVE);
1d2f4681 LW	153	if (IS_ERR(gpiod))
	154	return PTR_ERR(gpiod);
	155	config.ena_gpiod = gpiod;
e3d27775 MB	156
e3d27775 MB	157	/* Use default constraints if none set up */
3ea93896	158	if (!pdata \|\| !pdata->ldo[id].init_data \|\| wm8994->dev->of_node) {
e3d27775 MB	159	dev_dbg(wm8994->dev, "Using default init data, supply %s %s\n",
	160	ldo->supply.dev_name, ldo->supply.supply);
	161
	162	ldo->init_data = wm8994_ldo_default[id];
	163	ldo->init_data.consumer_supplies = &ldo->supply;
1d2f4681	164	if (!gpiod)
e3d27775 MB	165	ldo->init_data.constraints.valid_ops_mask = 0;
	166	} else {
	167	ldo->init_data = *pdata->ldo[id].init_data;
495fd8c8	168	}
c172708d	169
daa531db LW	170	/*
	171	* At this point the GPIO descriptor is handled over to the
	172	* regulator core and we need not worry about it on the
	173	* error path.
	174	*/
9e2bfbbd MB	175	ldo->regulator = devm_regulator_register(&pdev->dev,
	176	&wm8994_ldo_desc[id],
	177	&config);
69dc16c3 MB	178	if (IS_ERR(ldo->regulator)) {
	179	ret = PTR_ERR(ldo->regulator);
	180	dev_err(wm8994->dev, "Failed to register LDO%d: %d\n",
	181	id + 1, ret);
daa531db	182	return ret;
69dc16c3 MB	183	}
	184
	185	platform_set_drvdata(pdev, ldo);
	186
	187	return 0;
69dc16c3 MB	188	}
69dc16c3 MB	189
69dc16c3 MB	190	static struct platform_driver wm8994_ldo_driver = {
69dc16c3 MB	191	.probe = wm8994_ldo_probe,
69dc16c3 MB	192	.driver = {
	193	.name = "wm8994-ldo",
	194	},
	195	};
	196
05650216	197	module_platform_driver(wm8994_ldo_driver);
69dc16c3 MB	198
	199	/* Module information */
	200	MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
	201	MODULE_DESCRIPTION("WM8994 LDO driver");
	202	MODULE_LICENSE("GPL");
	203	MODULE_ALIAS("platform:wm8994-ldo");