[mirror_ubuntu-zesty-kernel.git] / drivers / regulator / arizona-ldo1.c

/*
 * arizona-ldo1.c  --  LDO1 supply for Arizona devices
 *
 * Copyright 2012 Wolfson Microelectronics PLC.
 *
 * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
 *
 *  This program is free software; you can redistribute  it and/or modify it
 *  under  the terms of  the GNU General  Public License as published by the
 *  Free Software Foundation;  either version 2 of the  License, or (at your
 *  option) any later version.
 */

#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/regulator/of_regulator.h>
#include <linux/gpio.h>
#include <linux/slab.h>

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

struct arizona_ldo1 {
	struct regulator_dev *regulator;
	struct arizona *arizona;

	struct regulator_consumer_supply supply;
	struct regulator_init_data init_data;
};

static int arizona_ldo1_hc_list_voltage(struct regulator_dev *rdev,
					unsigned int selector)
{
	if (selector >= rdev->desc->n_voltages)
		return -EINVAL;

	if (selector == rdev->desc->n_voltages - 1)
		return 1800000;
	else
		return rdev->desc->min_uV + (rdev->desc->uV_step * selector);
}

static int arizona_ldo1_hc_map_voltage(struct regulator_dev *rdev,
				       int min_uV, int max_uV)
{
	int sel;

	sel = DIV_ROUND_UP(min_uV - rdev->desc->min_uV, rdev->desc->uV_step);
	if (sel >= rdev->desc->n_voltages)
		sel = rdev->desc->n_voltages - 1;

	return sel;
}

static int arizona_ldo1_hc_set_voltage_sel(struct regulator_dev *rdev,
					   unsigned sel)
{
	struct arizona_ldo1 *ldo = rdev_get_drvdata(rdev);
	struct regmap *regmap = ldo->arizona->regmap;
	unsigned int val;
	int ret;

	if (sel == rdev->desc->n_voltages - 1)
		val = ARIZONA_LDO1_HI_PWR;
	else
		val = 0;

	ret = regmap_update_bits(regmap, ARIZONA_LDO1_CONTROL_2,
				 ARIZONA_LDO1_HI_PWR, val);
	if (ret != 0)
		return ret;

	ret = regmap_update_bits(regmap, ARIZONA_DYNAMIC_FREQUENCY_SCALING_1,
				 ARIZONA_SUBSYS_MAX_FREQ, val);
	if (ret != 0)
		return ret;

	if (val)
		return 0;

	val = sel << ARIZONA_LDO1_VSEL_SHIFT;

	return regmap_update_bits(regmap, ARIZONA_LDO1_CONTROL_1,
				  ARIZONA_LDO1_VSEL_MASK, val);
}

static int arizona_ldo1_hc_get_voltage_sel(struct regulator_dev *rdev)
{
	struct arizona_ldo1 *ldo = rdev_get_drvdata(rdev);
	struct regmap *regmap = ldo->arizona->regmap;
	unsigned int val;
	int ret;

	ret = regmap_read(regmap, ARIZONA_LDO1_CONTROL_2, &val);
	if (ret != 0)
		return ret;

	if (val & ARIZONA_LDO1_HI_PWR)
		return rdev->desc->n_voltages - 1;

	ret = regmap_read(regmap, ARIZONA_LDO1_CONTROL_1, &val);
	if (ret != 0)
		return ret;

	return (val & ARIZONA_LDO1_VSEL_MASK) >> ARIZONA_LDO1_VSEL_SHIFT;
}

static struct regulator_ops arizona_ldo1_hc_ops = {
	.list_voltage = arizona_ldo1_hc_list_voltage,
	.map_voltage = arizona_ldo1_hc_map_voltage,
	.get_voltage_sel = arizona_ldo1_hc_get_voltage_sel,
	.set_voltage_sel = arizona_ldo1_hc_set_voltage_sel,
	.get_bypass = regulator_get_bypass_regmap,
	.set_bypass = regulator_set_bypass_regmap,
};

static const struct regulator_desc arizona_ldo1_hc = {
	.name = "LDO1",
	.supply_name = "LDOVDD",
	.type = REGULATOR_VOLTAGE,
	.ops = &arizona_ldo1_hc_ops,

	.bypass_reg = ARIZONA_LDO1_CONTROL_1,
	.bypass_mask = ARIZONA_LDO1_BYPASS,
	.min_uV = 900000,
	.uV_step = 50000,
	.n_voltages = 8,
	.enable_time = 1500,

	.owner = THIS_MODULE,
};

static struct regulator_ops arizona_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,
	.get_bypass = regulator_get_bypass_regmap,
	.set_bypass = regulator_set_bypass_regmap,
};

static const struct regulator_desc arizona_ldo1 = {
	.name = "LDO1",
	.supply_name = "LDOVDD",
	.type = REGULATOR_VOLTAGE,
	.ops = &arizona_ldo1_ops,

	.vsel_reg = ARIZONA_LDO1_CONTROL_1,
	.vsel_mask = ARIZONA_LDO1_VSEL_MASK,
	.min_uV = 900000,
	.uV_step = 25000,
	.n_voltages = 13,
	.enable_time = 500,

	.owner = THIS_MODULE,
};

static const struct regulator_init_data arizona_ldo1_dvfs = {
	.constraints = {
		.min_uV = 1200000,
		.max_uV = 1800000,
		.valid_ops_mask = REGULATOR_CHANGE_STATUS |
				  REGULATOR_CHANGE_VOLTAGE,
	},
	.num_consumer_supplies = 1,
};

static const struct regulator_init_data arizona_ldo1_default = {
	.constraints = {
		.valid_ops_mask = REGULATOR_CHANGE_STATUS,
	},
	.num_consumer_supplies = 1,
};

static int arizona_ldo1_of_get_pdata(struct arizona *arizona,
				     struct regulator_config *config)
{
	struct arizona_pdata *pdata = &arizona->pdata;
	struct arizona_ldo1 *ldo1 = config->driver_data;
	struct device_node *init_node, *dcvdd_node;
	struct regulator_init_data *init_data;

	pdata->ldoena = arizona_of_get_named_gpio(arizona, "wlf,ldoena", true);

	init_node = of_get_child_by_name(arizona->dev->of_node, "ldo1");
	dcvdd_node = of_parse_phandle(arizona->dev->of_node, "DCVDD-supply", 0);

	if (init_node) {
		config->of_node = init_node;

		init_data = of_get_regulator_init_data(arizona->dev, init_node);

		if (init_data) {
			init_data->consumer_supplies = &ldo1->supply;
			init_data->num_consumer_supplies = 1;

			if (dcvdd_node && dcvdd_node != init_node)
				arizona->external_dcvdd = true;

			pdata->ldo1 = init_data;
		}
	} else if (dcvdd_node) {
		arizona->external_dcvdd = true;
	}

	of_node_put(dcvdd_node);

	return 0;
}

static int arizona_ldo1_probe(struct platform_device *pdev)
{
	struct arizona *arizona = dev_get_drvdata(pdev->dev.parent);
	const struct regulator_desc *desc;
	struct regulator_config config = { };
	struct arizona_ldo1 *ldo1;
	int ret;

	arizona->external_dcvdd = false;

	ldo1 = devm_kzalloc(&pdev->dev, sizeof(*ldo1), GFP_KERNEL);
	if (!ldo1)
		return -ENOMEM;

	ldo1->arizona = arizona;

	/*
	 * Since the chip usually supplies itself we provide some
	 * default init_data for it.  This will be overridden with
	 * platform data if provided.
	 */
	switch (arizona->type) {
	case WM5102:
	case WM8997:
		desc = &arizona_ldo1_hc;
		ldo1->init_data = arizona_ldo1_dvfs;
		break;
	default:
		desc = &arizona_ldo1;
		ldo1->init_data = arizona_ldo1_default;
		break;
	}

	ldo1->init_data.consumer_supplies = &ldo1->supply;
	ldo1->supply.supply = "DCVDD";
	ldo1->supply.dev_name = dev_name(arizona->dev);

	config.dev = arizona->dev;
	config.driver_data = ldo1;
	config.regmap = arizona->regmap;

	if (IS_ENABLED(CONFIG_OF)) {
		if (!dev_get_platdata(arizona->dev)) {
			ret = arizona_ldo1_of_get_pdata(arizona, &config);
			if (ret < 0)
				return ret;
		}
	}

	config.ena_gpio = arizona->pdata.ldoena;

	if (arizona->pdata.ldo1)
		config.init_data = arizona->pdata.ldo1;
	else
		config.init_data = &ldo1->init_data;

	/*
	 * LDO1 can only be used to supply DCVDD so if it has no
	 * consumers then DCVDD is supplied externally.
	 */
	if (config.init_data->num_consumer_supplies == 0)
		arizona->external_dcvdd = true;

	ldo1->regulator = devm_regulator_register(&pdev->dev, desc, &config);
	if (IS_ERR(ldo1->regulator)) {
		ret = PTR_ERR(ldo1->regulator);
		dev_err(arizona->dev, "Failed to register LDO1 supply: %d\n",
			ret);
		return ret;
	}

	of_node_put(config.of_node);

	platform_set_drvdata(pdev, ldo1);

	return 0;
}

static struct platform_driver arizona_ldo1_driver = {
	.probe = arizona_ldo1_probe,
	.driver		= {
		.name	= "arizona-ldo1",
		.owner	= THIS_MODULE,
	},
};

module_platform_driver(arizona_ldo1_driver);

/* Module information */
MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
MODULE_DESCRIPTION("Arizona LDO1 driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:arizona-ldo1");
Commit	Line	Data
1910efa1 MB	1	/*
	2	* arizona-ldo1.c -- LDO1 supply for Arizona devices
	3	*
	4	* Copyright 2012 Wolfson Microelectronics PLC.
	5	*
	6	* Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
	7	*
	8	* This program is free software; you can redistribute it and/or modify it
	9	* under the terms of the GNU General Public License as published by the
	10	* Free Software Foundation; either version 2 of the License, or (at your
	11	* option) any later version.
	12	*/
	13
	14	#include <linux/module.h>
	15	#include <linux/moduleparam.h>
	16	#include <linux/init.h>
	17	#include <linux/bitops.h>
	18	#include <linux/err.h>
	19	#include <linux/platform_device.h>
	20	#include <linux/regulator/driver.h>
	21	#include <linux/regulator/machine.h>
2cce4be9	22	#include <linux/regulator/of_regulator.h>
1910efa1 MB	23	#include <linux/gpio.h>
	24	#include <linux/slab.h>
	25
	26	#include <linux/mfd/arizona/core.h>
	27	#include <linux/mfd/arizona/pdata.h>
	28	#include <linux/mfd/arizona/registers.h>
	29
	30	struct arizona_ldo1 {
	31	struct regulator_dev *regulator;
	32	struct arizona *arizona;
	33
	34	struct regulator_consumer_supply supply;
	35	struct regulator_init_data init_data;
	36	};
	37
73ee2946 MB	38	static int arizona_ldo1_hc_list_voltage(struct regulator_dev *rdev,
	39	unsigned int selector)
	40	{
	41	if (selector >= rdev->desc->n_voltages)
	42	return -EINVAL;
	43
	44	if (selector == rdev->desc->n_voltages - 1)
	45	return 1800000;
	46	else
	47	return rdev->desc->min_uV + (rdev->desc->uV_step * selector);
	48	}
	49
	50	static int arizona_ldo1_hc_map_voltage(struct regulator_dev *rdev,
	51	int min_uV, int max_uV)
	52	{
	53	int sel;
	54
	55	sel = DIV_ROUND_UP(min_uV - rdev->desc->min_uV, rdev->desc->uV_step);
	56	if (sel >= rdev->desc->n_voltages)
	57	sel = rdev->desc->n_voltages - 1;
	58
	59	return sel;
	60	}
	61
	62	static int arizona_ldo1_hc_set_voltage_sel(struct regulator_dev *rdev,
	63	unsigned sel)
	64	{
	65	struct arizona_ldo1 *ldo = rdev_get_drvdata(rdev);
	66	struct regmap *regmap = ldo->arizona->regmap;
	67	unsigned int val;
	68	int ret;
	69
	70	if (sel == rdev->desc->n_voltages - 1)
	71	val = ARIZONA_LDO1_HI_PWR;
	72	else
	73	val = 0;
	74
	75	ret = regmap_update_bits(regmap, ARIZONA_LDO1_CONTROL_2,
	76	ARIZONA_LDO1_HI_PWR, val);
	77	if (ret != 0)
	78	return ret;
	79
	80	ret = regmap_update_bits(regmap, ARIZONA_DYNAMIC_FREQUENCY_SCALING_1,
	81	ARIZONA_SUBSYS_MAX_FREQ, val);
	82	if (ret != 0)
	83	return ret;
	84
	85	if (val)
	86	return 0;
	87
	88	val = sel << ARIZONA_LDO1_VSEL_SHIFT;
	89
	90	return regmap_update_bits(regmap, ARIZONA_LDO1_CONTROL_1,
	91	ARIZONA_LDO1_VSEL_MASK, val);
	92	}
	93
	94	static int arizona_ldo1_hc_get_voltage_sel(struct regulator_dev *rdev)
	95	{
	96	struct arizona_ldo1 *ldo = rdev_get_drvdata(rdev);
	97	struct regmap *regmap = ldo->arizona->regmap;
	98	unsigned int val;
	99	int ret;
	100
	101	ret = regmap_read(regmap, ARIZONA_LDO1_CONTROL_2, &val);
102	if (ret != 0)
103	return ret;
104
105	if (val & ARIZONA_LDO1_HI_PWR)
106	return rdev->desc->n_voltages - 1;
107
108	ret = regmap_read(regmap, ARIZONA_LDO1_CONTROL_1, &val);
109	if (ret != 0)
110	return ret;
111
112	return (val & ARIZONA_LDO1_VSEL_MASK) >> ARIZONA_LDO1_VSEL_SHIFT;
113	}
114
115	static struct regulator_ops arizona_ldo1_hc_ops = {
116	.list_voltage = arizona_ldo1_hc_list_voltage,
117	.map_voltage = arizona_ldo1_hc_map_voltage,
118	.get_voltage_sel = arizona_ldo1_hc_get_voltage_sel,
119	.set_voltage_sel = arizona_ldo1_hc_set_voltage_sel,
120	.get_bypass = regulator_get_bypass_regmap,
121	.set_bypass = regulator_set_bypass_regmap,
122	};
123
124	static const struct regulator_desc arizona_ldo1_hc = {
125	.name = "LDO1",
126	.supply_name = "LDOVDD",
127	.type = REGULATOR_VOLTAGE,
128	.ops = &arizona_ldo1_hc_ops,
129
130	.bypass_reg = ARIZONA_LDO1_CONTROL_1,
131	.bypass_mask = ARIZONA_LDO1_BYPASS,
132	.min_uV = 900000,
133	.uV_step = 50000,
134	.n_voltages = 8,
ce1bcb7e	135	.enable_time = 1500,
73ee2946 MB	136
	137	.owner = THIS_MODULE,
	138	};
	139
1910efa1 MB	140	static struct regulator_ops arizona_ldo1_ops = {
	141	.list_voltage = regulator_list_voltage_linear,
	142	.map_voltage = regulator_map_voltage_linear,
	143	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	144	.set_voltage_sel = regulator_set_voltage_sel_regmap,
9a17de04 MB	145	.get_bypass = regulator_get_bypass_regmap,
9a17de04 MB	146	.set_bypass = regulator_set_bypass_regmap,
1910efa1 MB	147	};
	148
	149	static const struct regulator_desc arizona_ldo1 = {
	150	.name = "LDO1",
	151	.supply_name = "LDOVDD",
	152	.type = REGULATOR_VOLTAGE,
	153	.ops = &arizona_ldo1_ops,
	154
	155	.vsel_reg = ARIZONA_LDO1_CONTROL_1,
	156	.vsel_mask = ARIZONA_LDO1_VSEL_MASK,
	157	.min_uV = 900000,
a35ff286 CK	158	.uV_step = 25000,
a35ff286 CK	159	.n_voltages = 13,
86a14501	160	.enable_time = 500,
1910efa1 MB	161
	162	.owner = THIS_MODULE,
	163	};
	164
55a18aef MB	165	static const struct regulator_init_data arizona_ldo1_dvfs = {
	166	.constraints = {
	167	.min_uV = 1200000,
	168	.max_uV = 1800000,
	169	.valid_ops_mask = REGULATOR_CHANGE_STATUS \|
	170	REGULATOR_CHANGE_VOLTAGE,
	171	},
	172	.num_consumer_supplies = 1,
	173	};
	174
1910efa1	175	static const struct regulator_init_data arizona_ldo1_default = {
a9905b1d MB	176	.constraints = {
	177	.valid_ops_mask = REGULATOR_CHANGE_STATUS,
	178	},
1910efa1 MB	179	.num_consumer_supplies = 1,
	180	};
	181
2cce4be9 CK	182	static int arizona_ldo1_of_get_pdata(struct arizona *arizona,
2cce4be9 CK	183	struct regulator_config *config)
4a8c475f CK	184	{
4a8c475f CK	185	struct arizona_pdata *pdata = &arizona->pdata;
2cce4be9 CK	186	struct arizona_ldo1 *ldo1 = config->driver_data;
	187	struct device_node init_node, dcvdd_node;
	188	struct regulator_init_data *init_data;
4a8c475f CK	189
	190	pdata->ldoena = arizona_of_get_named_gpio(arizona, "wlf,ldoena", true);
	191
2cce4be9 CK	192	init_node = of_get_child_by_name(arizona->dev->of_node, "ldo1");
	193	dcvdd_node = of_parse_phandle(arizona->dev->of_node, "DCVDD-supply", 0);
	194
	195	if (init_node) {
	196	config->of_node = init_node;
	197
	198	init_data = of_get_regulator_init_data(arizona->dev, init_node);
	199
	200	if (init_data) {
	201	init_data->consumer_supplies = &ldo1->supply;
	202	init_data->num_consumer_supplies = 1;
	203
	204	if (dcvdd_node && dcvdd_node != init_node)
	205	arizona->external_dcvdd = true;
	206
	207	pdata->ldo1 = init_data;
	208	}
	209	} else if (dcvdd_node) {
	210	arizona->external_dcvdd = true;
	211	}
	212
	213	of_node_put(dcvdd_node);
	214
4a8c475f CK	215	return 0;
	216	}
	217
a5023574	218	static int arizona_ldo1_probe(struct platform_device *pdev)
1910efa1 MB	219	{
1910efa1 MB	220	struct arizona *arizona = dev_get_drvdata(pdev->dev.parent);
73ee2946	221	const struct regulator_desc *desc;
1910efa1 MB	222	struct regulator_config config = { };
	223	struct arizona_ldo1 *ldo1;
	224	int ret;
	225
4a8c475f CK	226	arizona->external_dcvdd = false;
4a8c475f CK	227
1910efa1	228	ldo1 = devm_kzalloc(&pdev->dev, sizeof(*ldo1), GFP_KERNEL);
f4a6c5b4	229	if (!ldo1)
1910efa1	230	return -ENOMEM;
1910efa1 MB	231
	232	ldo1->arizona = arizona;
	233
	234	/*
	235	* Since the chip usually supplies itself we provide some
	236	* default init_data for it. This will be overridden with
	237	* platform data if provided.
	238	*/
55a18aef MB	239	switch (arizona->type) {
55a18aef MB	240	case WM5102:
a35ff286	241	case WM8997:
73ee2946	242	desc = &arizona_ldo1_hc;
55a18aef MB	243	ldo1->init_data = arizona_ldo1_dvfs;
	244	break;
	245	default:
73ee2946	246	desc = &arizona_ldo1;
55a18aef MB	247	ldo1->init_data = arizona_ldo1_default;
	248	break;
	249	}
	250
1910efa1 MB	251	ldo1->init_data.consumer_supplies = &ldo1->supply;
	252	ldo1->supply.supply = "DCVDD";
	253	ldo1->supply.dev_name = dev_name(arizona->dev);
	254
	255	config.dev = arizona->dev;
	256	config.driver_data = ldo1;
	257	config.regmap = arizona->regmap;
4a8c475f CK	258
	259	if (IS_ENABLED(CONFIG_OF)) {
	260	if (!dev_get_platdata(arizona->dev)) {
2cce4be9	261	ret = arizona_ldo1_of_get_pdata(arizona, &config);
4a8c475f CK	262	if (ret < 0)
	263	return ret;
	264	}
	265	}
	266
a9905b1d	267	config.ena_gpio = arizona->pdata.ldoena;
1910efa1 MB	268
	269	if (arizona->pdata.ldo1)
	270	config.init_data = arizona->pdata.ldo1;
	271	else
	272	config.init_data = &ldo1->init_data;
	273
4a8c475f CK	274	/*
	275	* LDO1 can only be used to supply DCVDD so if it has no
	276	* consumers then DCVDD is supplied externally.
	277	*/
	278	if (config.init_data->num_consumer_supplies == 0)
	279	arizona->external_dcvdd = true;
	280
14ffa888	281	ldo1->regulator = devm_regulator_register(&pdev->dev, desc, &config);
1910efa1 MB	282	if (IS_ERR(ldo1->regulator)) {
	283	ret = PTR_ERR(ldo1->regulator);
	284	dev_err(arizona->dev, "Failed to register LDO1 supply: %d\n",
	285	ret);
	286	return ret;
	287	}
	288
2cce4be9 CK	289	of_node_put(config.of_node);
2cce4be9 CK	290
1910efa1 MB	291	platform_set_drvdata(pdev, ldo1);
	292
	293	return 0;
	294	}
	295
1910efa1 MB	296	static struct platform_driver arizona_ldo1_driver = {
1910efa1 MB	297	.probe = arizona_ldo1_probe,
1910efa1 MB	298	.driver = {
	299	.name = "arizona-ldo1",
	300	.owner = THIS_MODULE,
	301	},
	302	};
	303
	304	module_platform_driver(arizona_ldo1_driver);
	305
	306	/* Module information */
	307	MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
	308	MODULE_DESCRIPTION("Arizona LDO1 driver");
	309	MODULE_LICENSE("GPL");
	310	MODULE_ALIAS("platform:arizona-ldo1");