[linux.git] / drivers / regulator / lochnagar-regulator.c

// SPDX-License-Identifier: GPL-2.0
//
// Lochnagar regulator driver
//
// Copyright (c) 2017-2018 Cirrus Logic, Inc. and
//                         Cirrus Logic International Semiconductor Ltd.
//
// Author: Charles Keepax <[email protected]>

#include <linux/bitops.h>
#include <linux/device.h>
#include <linux/err.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/regulator/of_regulator.h>

#include <linux/mfd/lochnagar.h>
#include <linux/mfd/lochnagar1_regs.h>
#include <linux/mfd/lochnagar2_regs.h>

static const struct regulator_ops lochnagar_micvdd_ops = {
	.enable = regulator_enable_regmap,
	.disable = regulator_disable_regmap,
	.is_enabled = regulator_is_enabled_regmap,

	.list_voltage = regulator_list_voltage_linear_range,
	.map_voltage = regulator_map_voltage_linear_range,

	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	.set_voltage_sel = regulator_set_voltage_sel_regmap,
};

static const struct linear_range lochnagar_micvdd_ranges[] = {
	REGULATOR_LINEAR_RANGE(1000000, 0,    0xC, 50000),
	REGULATOR_LINEAR_RANGE(1700000, 0xD, 0x1F, 100000),
};

static int lochnagar_micbias_enable(struct regulator_dev *rdev)
{
	struct lochnagar *lochnagar = rdev_get_drvdata(rdev);
	int ret;

	mutex_lock(&lochnagar->analogue_config_lock);

	ret = regulator_enable_regmap(rdev);
	if (ret < 0)
		goto err;

	ret = lochnagar_update_config(lochnagar);

err:
	mutex_unlock(&lochnagar->analogue_config_lock);

	return ret;
}

static int lochnagar_micbias_disable(struct regulator_dev *rdev)
{
	struct lochnagar *lochnagar = rdev_get_drvdata(rdev);
	int ret;

	mutex_lock(&lochnagar->analogue_config_lock);

	ret = regulator_disable_regmap(rdev);
	if (ret < 0)
		goto err;

	ret = lochnagar_update_config(lochnagar);

err:
	mutex_unlock(&lochnagar->analogue_config_lock);

	return ret;
}

static const struct regulator_ops lochnagar_micbias_ops = {
	.enable = lochnagar_micbias_enable,
	.disable = lochnagar_micbias_disable,
	.is_enabled = regulator_is_enabled_regmap,
};

static const struct regulator_ops lochnagar_vddcore_ops = {
	.enable = regulator_enable_regmap,
	.disable = regulator_disable_regmap,
	.is_enabled = regulator_is_enabled_regmap,

	.list_voltage = regulator_list_voltage_linear_range,
	.map_voltage = regulator_map_voltage_linear_range,

	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	.set_voltage_sel = regulator_set_voltage_sel_regmap,
};

static const struct linear_range lochnagar_vddcore_ranges[] = {
	REGULATOR_LINEAR_RANGE(600000, 0,    0x7, 0),
	REGULATOR_LINEAR_RANGE(600000, 0x8, 0x41, 12500),
};

enum lochnagar_regulators {
	LOCHNAGAR_MICVDD,
	LOCHNAGAR_MIC1VDD,
	LOCHNAGAR_MIC2VDD,
	LOCHNAGAR_VDDCORE,
};

static int lochnagar_micbias_of_parse(struct device_node *np,
				      const struct regulator_desc *desc,
				      struct regulator_config *config)
{
	struct lochnagar *lochnagar = config->driver_data;
	int shift = (desc->id - LOCHNAGAR_MIC1VDD) *
		    LOCHNAGAR2_P2_MICBIAS_SRC_SHIFT;
	int mask = LOCHNAGAR2_P1_MICBIAS_SRC_MASK << shift;
	unsigned int val;
	int ret;

	ret = of_property_read_u32(np, "cirrus,micbias-input", &val);
	if (ret >= 0) {
		mutex_lock(&lochnagar->analogue_config_lock);
		ret = regmap_update_bits(lochnagar->regmap,
					 LOCHNAGAR2_ANALOGUE_PATH_CTRL2,
					 mask, val << shift);
		mutex_unlock(&lochnagar->analogue_config_lock);
		if (ret < 0) {
			dev_err(lochnagar->dev,
				"Failed to update micbias source: %d\n", ret);
			return ret;
		}
	}

	return 0;
}

static const struct regulator_desc lochnagar_regulators[] = {
	[LOCHNAGAR_MICVDD] = {
		.name = "MICVDD",
		.supply_name = "SYSVDD",
		.type = REGULATOR_VOLTAGE,
		.n_voltages = 32,
		.ops = &lochnagar_micvdd_ops,

		.id = LOCHNAGAR_MICVDD,
		.of_match = of_match_ptr("MICVDD"),

		.enable_reg = LOCHNAGAR2_MICVDD_CTRL1,
		.enable_mask = LOCHNAGAR2_MICVDD_REG_ENA_MASK,
		.vsel_reg = LOCHNAGAR2_MICVDD_CTRL2,
		.vsel_mask = LOCHNAGAR2_MICVDD_VSEL_MASK,

		.linear_ranges = lochnagar_micvdd_ranges,
		.n_linear_ranges = ARRAY_SIZE(lochnagar_micvdd_ranges),

		.enable_time = 3000,
		.ramp_delay = 1000,

		.owner = THIS_MODULE,
	},
	[LOCHNAGAR_MIC1VDD] = {
		.name = "MIC1VDD",
		.supply_name = "MICBIAS1",
		.type = REGULATOR_VOLTAGE,
		.ops = &lochnagar_micbias_ops,

		.id = LOCHNAGAR_MIC1VDD,
		.of_match = of_match_ptr("MIC1VDD"),
		.of_parse_cb = lochnagar_micbias_of_parse,

		.enable_reg = LOCHNAGAR2_ANALOGUE_PATH_CTRL2,
		.enable_mask = LOCHNAGAR2_P1_INPUT_BIAS_ENA_MASK,

		.owner = THIS_MODULE,
	},
	[LOCHNAGAR_MIC2VDD] = {
		.name = "MIC2VDD",
		.supply_name = "MICBIAS2",
		.type = REGULATOR_VOLTAGE,
		.ops = &lochnagar_micbias_ops,

		.id = LOCHNAGAR_MIC2VDD,
		.of_match = of_match_ptr("MIC2VDD"),
		.of_parse_cb = lochnagar_micbias_of_parse,

		.enable_reg = LOCHNAGAR2_ANALOGUE_PATH_CTRL2,
		.enable_mask = LOCHNAGAR2_P2_INPUT_BIAS_ENA_MASK,

		.owner = THIS_MODULE,
	},
	[LOCHNAGAR_VDDCORE] = {
		.name = "VDDCORE",
		.supply_name = "SYSVDD",
		.type = REGULATOR_VOLTAGE,
		.n_voltages = 66,
		.ops = &lochnagar_vddcore_ops,

		.id = LOCHNAGAR_VDDCORE,
		.of_match = of_match_ptr("VDDCORE"),

		.enable_reg = LOCHNAGAR2_VDDCORE_CDC_CTRL1,
		.enable_mask = LOCHNAGAR2_VDDCORE_CDC_REG_ENA_MASK,
		.vsel_reg = LOCHNAGAR2_VDDCORE_CDC_CTRL2,
		.vsel_mask = LOCHNAGAR2_VDDCORE_CDC_VSEL_MASK,

		.linear_ranges = lochnagar_vddcore_ranges,
		.n_linear_ranges = ARRAY_SIZE(lochnagar_vddcore_ranges),

		.enable_time = 3000,
		.ramp_delay = 1000,
		.off_on_delay = 15000,

		.owner = THIS_MODULE,
	},
};

static const struct of_device_id lochnagar_of_match[] = {
	{
		.compatible = "cirrus,lochnagar2-micvdd",
		.data = &lochnagar_regulators[LOCHNAGAR_MICVDD],
	},
	{
		.compatible = "cirrus,lochnagar2-mic1vdd",
		.data = &lochnagar_regulators[LOCHNAGAR_MIC1VDD],
	},
	{
		.compatible = "cirrus,lochnagar2-mic2vdd",
		.data = &lochnagar_regulators[LOCHNAGAR_MIC2VDD],
	},
	{
		.compatible = "cirrus,lochnagar2-vddcore",
		.data = &lochnagar_regulators[LOCHNAGAR_VDDCORE],
	},
	{}
};
MODULE_DEVICE_TABLE(of, lochnagar_of_match);

static int lochnagar_regulator_probe(struct platform_device *pdev)
{
	struct device *dev = &pdev->dev;
	struct lochnagar *lochnagar = dev_get_drvdata(dev->parent);
	struct regulator_config config = { };
	const struct regulator_desc *desc;
	struct regulator_dev *rdev;
	int ret;

	config.dev = dev;
	config.regmap = lochnagar->regmap;
	config.driver_data = lochnagar;

	desc = device_get_match_data(dev);
	if (!desc)
		return -EINVAL;

	rdev = devm_regulator_register(dev, desc, &config);
	if (IS_ERR(rdev)) {
		ret = PTR_ERR(rdev);
		dev_err(dev, "Failed to register %s regulator: %d\n",
			desc->name, ret);
		return ret;
	}

	return 0;
}

static struct platform_driver lochnagar_regulator_driver = {
	.driver = {
		.name = "lochnagar-regulator",
		.probe_type = PROBE_PREFER_ASYNCHRONOUS,
		.of_match_table = of_match_ptr(lochnagar_of_match),
	},

	.probe = lochnagar_regulator_probe,
};
module_platform_driver(lochnagar_regulator_driver);

MODULE_AUTHOR("Charles Keepax <[email protected]>");
MODULE_DESCRIPTION("Regulator driver for Cirrus Logic Lochnagar Board");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:lochnagar-regulator");
Commit	Line	Data
bef9391c	1	// SPDX-License-Identifier: GPL-2.0
d8b2a8e9 CK	2	//
	3	// Lochnagar regulator driver
	4	//
	5	// Copyright (c) 2017-2018 Cirrus Logic, Inc. and
	6	// Cirrus Logic International Semiconductor Ltd.
	7	//
	8	// Author: Charles Keepax <[email protected]>
bef9391c CK	9
	10	#include <linux/bitops.h>
	11	#include <linux/device.h>
	12	#include <linux/err.h>
	13	#include <linux/module.h>
	14	#include <linux/mutex.h>
	15	#include <linux/of.h>
	16	#include <linux/platform_device.h>
	17	#include <linux/regmap.h>
	18	#include <linux/regulator/driver.h>
	19	#include <linux/regulator/machine.h>
	20	#include <linux/regulator/of_regulator.h>
	21
	22	#include <linux/mfd/lochnagar.h>
fa2bb8b9 CK	23	#include <linux/mfd/lochnagar1_regs.h>
fa2bb8b9 CK	24	#include <linux/mfd/lochnagar2_regs.h>
bef9391c CK	25
	26	static const struct regulator_ops lochnagar_micvdd_ops = {
	27	.enable = regulator_enable_regmap,
	28	.disable = regulator_disable_regmap,
	29	.is_enabled = regulator_is_enabled_regmap,
	30
	31	.list_voltage = regulator_list_voltage_linear_range,
	32	.map_voltage = regulator_map_voltage_linear_range,
	33
	34	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	35	.set_voltage_sel = regulator_set_voltage_sel_regmap,
	36	};
	37
60ab7f41	38	static const struct linear_range lochnagar_micvdd_ranges[] = {
bef9391c CK	39	REGULATOR_LINEAR_RANGE(1000000, 0, 0xC, 50000),
	40	REGULATOR_LINEAR_RANGE(1700000, 0xD, 0x1F, 100000),
	41	};
	42
	43	static int lochnagar_micbias_enable(struct regulator_dev *rdev)
	44	{
	45	struct lochnagar *lochnagar = rdev_get_drvdata(rdev);
	46	int ret;
	47
	48	mutex_lock(&lochnagar->analogue_config_lock);
	49
	50	ret = regulator_enable_regmap(rdev);
	51	if (ret < 0)
	52	goto err;
	53
	54	ret = lochnagar_update_config(lochnagar);
	55
	56	err:
	57	mutex_unlock(&lochnagar->analogue_config_lock);
	58
	59	return ret;
	60	}
	61
	62	static int lochnagar_micbias_disable(struct regulator_dev *rdev)
	63	{
	64	struct lochnagar *lochnagar = rdev_get_drvdata(rdev);
	65	int ret;
	66
	67	mutex_lock(&lochnagar->analogue_config_lock);
	68
	69	ret = regulator_disable_regmap(rdev);
	70	if (ret < 0)
	71	goto err;
	72
	73	ret = lochnagar_update_config(lochnagar);
	74
	75	err:
	76	mutex_unlock(&lochnagar->analogue_config_lock);
	77
	78	return ret;
	79	}
	80
	81	static const struct regulator_ops lochnagar_micbias_ops = {
	82	.enable = lochnagar_micbias_enable,
	83	.disable = lochnagar_micbias_disable,
	84	.is_enabled = regulator_is_enabled_regmap,
	85	};
	86
	87	static const struct regulator_ops lochnagar_vddcore_ops = {
	88	.enable = regulator_enable_regmap,
	89	.disable = regulator_disable_regmap,
	90	.is_enabled = regulator_is_enabled_regmap,
	91
	92	.list_voltage = regulator_list_voltage_linear_range,
	93	.map_voltage = regulator_map_voltage_linear_range,
	94
	95	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	96	.set_voltage_sel = regulator_set_voltage_sel_regmap,
	97	};
	98
60ab7f41	99	static const struct linear_range lochnagar_vddcore_ranges[] = {
6dc9674d	100	REGULATOR_LINEAR_RANGE(600000, 0, 0x7, 0),
bef9391c CK	101	REGULATOR_LINEAR_RANGE(600000, 0x8, 0x41, 12500),
	102	};
	103
	104	enum lochnagar_regulators {
	105	LOCHNAGAR_MICVDD,
	106	LOCHNAGAR_MIC1VDD,
	107	LOCHNAGAR_MIC2VDD,
	108	LOCHNAGAR_VDDCORE,
	109	};
	110
	111	static int lochnagar_micbias_of_parse(struct device_node *np,
	112	const struct regulator_desc *desc,
	113	struct regulator_config *config)
	114	{
	115	struct lochnagar *lochnagar = config->driver_data;
	116	int shift = (desc->id - LOCHNAGAR_MIC1VDD) *
	117	LOCHNAGAR2_P2_MICBIAS_SRC_SHIFT;
	118	int mask = LOCHNAGAR2_P1_MICBIAS_SRC_MASK << shift;
	119	unsigned int val;
	120	int ret;
	121
	122	ret = of_property_read_u32(np, "cirrus,micbias-input", &val);
	123	if (ret >= 0) {
	124	mutex_lock(&lochnagar->analogue_config_lock);
	125	ret = regmap_update_bits(lochnagar->regmap,
	126	LOCHNAGAR2_ANALOGUE_PATH_CTRL2,
	127	mask, val << shift);
	128	mutex_unlock(&lochnagar->analogue_config_lock);
	129	if (ret < 0) {
	130	dev_err(lochnagar->dev,
	131	"Failed to update micbias source: %d\n", ret);
	132	return ret;
	133	}
	134	}
	135
	136	return 0;
	137	}
	138
	139	static const struct regulator_desc lochnagar_regulators[] = {
	140	[LOCHNAGAR_MICVDD] = {
	141	.name = "MICVDD",
	142	.supply_name = "SYSVDD",
	143	.type = REGULATOR_VOLTAGE,
	144	.n_voltages = 32,
	145	.ops = &lochnagar_micvdd_ops,
	146
	147	.id = LOCHNAGAR_MICVDD,
	148	.of_match = of_match_ptr("MICVDD"),
	149
	150	.enable_reg = LOCHNAGAR2_MICVDD_CTRL1,
	151	.enable_mask = LOCHNAGAR2_MICVDD_REG_ENA_MASK,
	152	.vsel_reg = LOCHNAGAR2_MICVDD_CTRL2,
	153	.vsel_mask = LOCHNAGAR2_MICVDD_VSEL_MASK,
	154
	155	.linear_ranges = lochnagar_micvdd_ranges,
	156	.n_linear_ranges = ARRAY_SIZE(lochnagar_micvdd_ranges),
	157
	158	.enable_time = 3000,
	159	.ramp_delay = 1000,
	160
	161	.owner = THIS_MODULE,
	162	},
	163	[LOCHNAGAR_MIC1VDD] = {
	164	.name = "MIC1VDD",
165	.supply_name = "MICBIAS1",
166	.type = REGULATOR_VOLTAGE,
167	.ops = &lochnagar_micbias_ops,
168
169	.id = LOCHNAGAR_MIC1VDD,
170	.of_match = of_match_ptr("MIC1VDD"),
171	.of_parse_cb = lochnagar_micbias_of_parse,
172
173	.enable_reg = LOCHNAGAR2_ANALOGUE_PATH_CTRL2,
174	.enable_mask = LOCHNAGAR2_P1_INPUT_BIAS_ENA_MASK,
175
176	.owner = THIS_MODULE,
177	},
178	[LOCHNAGAR_MIC2VDD] = {
179	.name = "MIC2VDD",
180	.supply_name = "MICBIAS2",
181	.type = REGULATOR_VOLTAGE,
182	.ops = &lochnagar_micbias_ops,
183
184	.id = LOCHNAGAR_MIC2VDD,
185	.of_match = of_match_ptr("MIC2VDD"),
186	.of_parse_cb = lochnagar_micbias_of_parse,
187
188	.enable_reg = LOCHNAGAR2_ANALOGUE_PATH_CTRL2,
189	.enable_mask = LOCHNAGAR2_P2_INPUT_BIAS_ENA_MASK,
190
191	.owner = THIS_MODULE,
192	},
193	[LOCHNAGAR_VDDCORE] = {
194	.name = "VDDCORE",
195	.supply_name = "SYSVDD",
196	.type = REGULATOR_VOLTAGE,
9df3bb31	197	.n_voltages = 66,
bef9391c CK	198	.ops = &lochnagar_vddcore_ops,
	199
	200	.id = LOCHNAGAR_VDDCORE,
	201	.of_match = of_match_ptr("VDDCORE"),
	202
	203	.enable_reg = LOCHNAGAR2_VDDCORE_CDC_CTRL1,
	204	.enable_mask = LOCHNAGAR2_VDDCORE_CDC_REG_ENA_MASK,
	205	.vsel_reg = LOCHNAGAR2_VDDCORE_CDC_CTRL2,
	206	.vsel_mask = LOCHNAGAR2_VDDCORE_CDC_VSEL_MASK,
	207
	208	.linear_ranges = lochnagar_vddcore_ranges,
	209	.n_linear_ranges = ARRAY_SIZE(lochnagar_vddcore_ranges),
	210
	211	.enable_time = 3000,
	212	.ramp_delay = 1000,
f75841aa	213	.off_on_delay = 15000,
bef9391c CK	214
	215	.owner = THIS_MODULE,
	216	},
	217	};
	218
d90acbc4 CK	219	static const struct of_device_id lochnagar_of_match[] = {
	220	{
	221	.compatible = "cirrus,lochnagar2-micvdd",
	222	.data = &lochnagar_regulators[LOCHNAGAR_MICVDD],
	223	},
	224	{
	225	.compatible = "cirrus,lochnagar2-mic1vdd",
	226	.data = &lochnagar_regulators[LOCHNAGAR_MIC1VDD],
	227	},
	228	{
	229	.compatible = "cirrus,lochnagar2-mic2vdd",
4cac31e2	230	.data = &lochnagar_regulators[LOCHNAGAR_MIC2VDD],
d90acbc4 CK	231	},
	232	{
	233	.compatible = "cirrus,lochnagar2-vddcore",
	234	.data = &lochnagar_regulators[LOCHNAGAR_VDDCORE],
	235	},
692f8b56	236	{}
d90acbc4	237	};
692f8b56	238	MODULE_DEVICE_TABLE(of, lochnagar_of_match);
d90acbc4	239
bef9391c CK	240	static int lochnagar_regulator_probe(struct platform_device *pdev)
	241	{
	242	struct device *dev = &pdev->dev;
	243	struct lochnagar *lochnagar = dev_get_drvdata(dev->parent);
	244	struct regulator_config config = { };
d90acbc4	245	const struct regulator_desc *desc;
bef9391c	246	struct regulator_dev *rdev;
d90acbc4	247	int ret;
bef9391c	248
d90acbc4	249	config.dev = dev;
bef9391c CK	250	config.regmap = lochnagar->regmap;
	251	config.driver_data = lochnagar;
	252
8f7e17d8 RH	253	desc = device_get_match_data(dev);
8f7e17d8 RH	254	if (!desc)
d90acbc4	255	return -EINVAL;
bef9391c	256
d90acbc4 CK	257	rdev = devm_regulator_register(dev, desc, &config);
	258	if (IS_ERR(rdev)) {
	259	ret = PTR_ERR(rdev);
	260	dev_err(dev, "Failed to register %s regulator: %d\n",
	261	desc->name, ret);
	262	return ret;
bef9391c CK	263	}
	264
	265	return 0;
	266	}
	267
	268	static struct platform_driver lochnagar_regulator_driver = {
	269	.driver = {
	270	.name = "lochnagar-regulator",
d3b81d97	271	.probe_type = PROBE_PREFER_ASYNCHRONOUS,
d90acbc4	272	.of_match_table = of_match_ptr(lochnagar_of_match),
bef9391c CK	273	},
	274
	275	.probe = lochnagar_regulator_probe,
	276	};
	277	module_platform_driver(lochnagar_regulator_driver);
	278
	279	MODULE_AUTHOR("Charles Keepax <[email protected]>");
	280	MODULE_DESCRIPTION("Regulator driver for Cirrus Logic Lochnagar Board");
	281	MODULE_LICENSE("GPL v2");
	282	MODULE_ALIAS("platform:lochnagar-regulator");