summaryrefslogtreecommitdiffstats
path: root/drivers/regulator/88pm800.c
blob: 3459f60dcfd1c7dfc67aa641edd49f697ffb8b94 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
/*
 * Regulators driver for Marvell 88PM800
 *
 * Copyright (C) 2012 Marvell International Ltd.
 * Joseph(Yossi) Hanin <yhanin@marvell.com>
 * Yi Zhang <yizhang@marvell.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/err.h>
#include <linux/regmap.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/mfd/88pm80x.h>
#include <linux/delay.h>
#include <linux/io.h>
#include <linux/of.h>
#include <linux/regulator/of_regulator.h>

/* LDO1 with DVC[0..3] */
#define PM800_LDO1_VOUT		(0x08) /* VOUT1 */
#define PM800_LDO1_VOUT_2	(0x09)
#define PM800_LDO1_VOUT_3	(0x0A)
#define PM800_LDO2_VOUT		(0x0B)
#define PM800_LDO3_VOUT		(0x0C)
#define PM800_LDO4_VOUT		(0x0D)
#define PM800_LDO5_VOUT		(0x0E)
#define PM800_LDO6_VOUT		(0x0F)
#define PM800_LDO7_VOUT		(0x10)
#define PM800_LDO8_VOUT		(0x11)
#define PM800_LDO9_VOUT		(0x12)
#define PM800_LDO10_VOUT	(0x13)
#define PM800_LDO11_VOUT	(0x14)
#define PM800_LDO12_VOUT	(0x15)
#define PM800_LDO13_VOUT	(0x16)
#define PM800_LDO14_VOUT	(0x17)
#define PM800_LDO15_VOUT	(0x18)
#define PM800_LDO16_VOUT	(0x19)
#define PM800_LDO17_VOUT	(0x1A)
#define PM800_LDO18_VOUT	(0x1B)
#define PM800_LDO19_VOUT	(0x1C)

/* BUCK1 with DVC[0..3] */
#define PM800_BUCK1		(0x3C)
#define PM800_BUCK1_1		(0x3D)
#define PM800_BUCK1_2		(0x3E)
#define PM800_BUCK1_3		(0x3F)
#define PM800_BUCK2		(0x40)
#define PM800_BUCK3		(0x41)
#define PM800_BUCK3		(0x41)
#define PM800_BUCK4		(0x42)
#define PM800_BUCK4_1		(0x43)
#define PM800_BUCK4_2		(0x44)
#define PM800_BUCK4_3		(0x45)
#define PM800_BUCK5		(0x46)

#define PM800_BUCK_ENA		(0x50)
#define PM800_LDO_ENA1_1	(0x51)
#define PM800_LDO_ENA1_2	(0x52)
#define PM800_LDO_ENA1_3	(0x53)

#define PM800_LDO_ENA2_1	(0x56)
#define PM800_LDO_ENA2_2	(0x57)
#define PM800_LDO_ENA2_3	(0x58)

#define PM800_BUCK1_MISC1	(0x78)
#define PM800_BUCK3_MISC1	(0x7E)
#define PM800_BUCK4_MISC1	(0x81)
#define PM800_BUCK5_MISC1	(0x84)

struct pm800_regulator_info {
	struct regulator_desc desc;
	int max_ua;
};

struct pm800_regulators {
	struct regulator_dev *regulators[PM800_ID_RG_MAX];
	struct pm80x_chip *chip;
	struct regmap *map;
};

/*
 * vreg - the buck regs string.
 * ereg - the string for the enable register.
 * ebit - the bit number in the enable register.
 * amax - the current
 * Buck has 2 kinds of voltage steps. It is easy to find voltage by ranges,
 * not the constant voltage table.
 * n_volt - Number of available selectors
 */
#define PM800_BUCK(vreg, ereg, ebit, amax, volt_ranges, n_volt)		\
{									\
	.desc	= {							\
		.name	= #vreg,					\
		.ops	= &pm800_volt_range_ops,			\
		.type	= REGULATOR_VOLTAGE,				\
		.id	= PM800_ID_##vreg,				\
		.owner	= THIS_MODULE,					\
		.n_voltages		= n_volt,			\
		.linear_ranges		= volt_ranges,			\
		.n_linear_ranges	= ARRAY_SIZE(volt_ranges),	\
		.vsel_reg		= PM800_##vreg,			\
		.vsel_mask		= 0x7f,				\
		.enable_reg		= PM800_##ereg,			\
		.enable_mask		= 1 << (ebit),			\
	},								\
	.max_ua		= (amax),					\
}

/*
 * vreg - the LDO regs string
 * ereg -  the string for the enable register.
 * ebit - the bit number in the enable register.
 * amax - the current
 * volt_table - the LDO voltage table
 * For all the LDOes, there are too many ranges. Using volt_table will be
 * simpler and faster.
 */
#define PM800_LDO(vreg, ereg, ebit, amax, ldo_volt_table)		\
{									\
	.desc	= {							\
		.name	= #vreg,					\
		.ops	= &pm800_volt_table_ops,			\
		.type	= REGULATOR_VOLTAGE,				\
		.id	= PM800_ID_##vreg,				\
		.owner	= THIS_MODULE,					\
		.n_voltages = ARRAY_SIZE(ldo_volt_table),		\
		.vsel_reg	= PM800_##vreg##_VOUT,			\
		.vsel_mask	= 0x1f,					\
		.enable_reg	= PM800_##ereg,				\
		.enable_mask	= 1 << (ebit),				\
		.volt_table	= ldo_volt_table,			\
	},								\
	.max_ua		= (amax),					\
}

/* Ranges are sorted in ascending order. */
static const struct regulator_linear_range buck1_volt_range[] = {
	{ .min_uV = 600000, .max_uV = 1587500, .min_sel = 0, .max_sel = 0x4f,
	  .uV_step = 12500 },
	{ .min_uV = 1600000, .max_uV = 1800000, .min_sel = 0x50,
	  .max_sel = 0x54, .uV_step = 50000 },
};

/* BUCK 2~5 have same ranges. */
static const struct regulator_linear_range buck2_5_volt_range[] = {
	{ .min_uV = 600000, .max_uV = 1587500,	.min_sel = 0, .max_sel = 0x4f,
	  .uV_step = 12500 },
	{ .min_uV = 1600000, .max_uV = 3300000, .min_sel = 0x50,
	  .max_sel = 0x72, .uV_step = 50000 },
};

static const unsigned int ldo1_volt_table[] = {
	600000,  650000,  700000,  750000,  800000,  850000,  900000,  950000,
	1000000, 1050000, 1100000, 1150000, 1200000, 1300000, 1400000, 1500000,
};

static const unsigned int ldo2_volt_table[] = {
	1700000, 1800000, 1900000, 2000000, 2100000, 2500000, 2700000, 2800000,
};

/* LDO 3~17 have same voltage table. */
static const unsigned int ldo3_17_volt_table[] = {
	1200000, 1250000, 1700000, 1800000, 1850000, 1900000, 2500000, 2600000,
	2700000, 2750000, 2800000, 2850000, 2900000, 3000000, 3100000, 3300000,
};

/* LDO 18~19 have same voltage table. */
static const unsigned int ldo18_19_volt_table[] = {
	1700000, 1800000, 1900000, 2500000, 2800000, 2900000, 3100000, 3300000,
};

static int pm800_get_current_limit(struct regulator_dev *rdev)
{
	struct pm800_regulator_info *info = rdev_get_drvdata(rdev);

	return info->max_ua;
}

static struct regulator_ops pm800_volt_range_ops = {
	.list_voltage = regulator_list_voltage_linear_range,
	.map_voltage = regulator_map_voltage_linear_range,
	.set_voltage_sel = regulator_set_voltage_sel_regmap,
	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	.enable = regulator_enable_regmap,
	.disable = regulator_disable_regmap,
	.is_enabled = regulator_is_enabled_regmap,
	.get_current_limit = pm800_get_current_limit,
};

static struct regulator_ops pm800_volt_table_ops = {
	.list_voltage = regulator_list_voltage_table,
	.map_voltage = regulator_map_voltage_iterate,
	.set_voltage_sel = regulator_set_voltage_sel_regmap,
	.get_voltage_sel = regulator_get_voltage_sel_regmap,
	.enable = regulator_enable_regmap,
	.disable = regulator_disable_regmap,
	.is_enabled = regulator_is_enabled_regmap,
	.get_current_limit = pm800_get_current_limit,
};

/* The array is indexed by id(PM800_ID_XXX) */
static struct pm800_regulator_info pm800_regulator_info[] = {
	PM800_BUCK(BUCK1, BUCK_ENA, 0, 3000000, buck1_volt_range, 0x55),
	PM800_BUCK(BUCK2, BUCK_ENA, 1, 1200000, buck2_5_volt_range, 0x73),
	PM800_BUCK(BUCK3, BUCK_ENA, 2, 1200000, buck2_5_volt_range, 0x73),
	PM800_BUCK(BUCK4, BUCK_ENA, 3, 1200000, buck2_5_volt_range, 0x73),
	PM800_BUCK(BUCK5, BUCK_ENA, 4, 1200000, buck2_5_volt_range, 0x73),

	PM800_LDO(LDO1, LDO_ENA1_1, 0, 200000, ldo1_volt_table),
	PM800_LDO(LDO2, LDO_ENA1_1, 1, 10000, ldo2_volt_table),
	PM800_LDO(LDO3, LDO_ENA1_1, 2, 300000, ldo3_17_volt_table),
	PM800_LDO(LDO4, LDO_ENA1_1, 3, 300000, ldo3_17_volt_table),
	PM800_LDO(LDO5, LDO_ENA1_1, 4, 300000, ldo3_17_volt_table),
	PM800_LDO(LDO6, LDO_ENA1_1, 5, 300000, ldo3_17_volt_table),
	PM800_LDO(LDO7, LDO_ENA1_1, 6, 300000, ldo3_17_volt_table),
	PM800_LDO(LDO8, LDO_ENA1_1, 7, 300000, ldo3_17_volt_table),
	PM800_LDO(LDO9, LDO_ENA1_2, 0, 300000, ldo3_17_volt_table),
	PM800_LDO(LDO10, LDO_ENA1_2, 1, 300000, ldo3_17_volt_table),
	PM800_LDO(LDO11, LDO_ENA1_2, 2, 300000, ldo3_17_volt_table),
	PM800_LDO(LDO12, LDO_ENA1_2, 3, 300000, ldo3_17_volt_table),
	PM800_LDO(LDO13, LDO_ENA1_2, 4, 300000, ldo3_17_volt_table),
	PM800_LDO(LDO14, LDO_ENA1_2, 5, 300000, ldo3_17_volt_table),
	PM800_LDO(LDO15, LDO_ENA1_2, 6, 300000, ldo3_17_volt_table),
	PM800_LDO(LDO16, LDO_ENA1_2, 7, 300000, ldo3_17_volt_table),
	PM800_LDO(LDO17, LDO_ENA1_3, 0, 300000, ldo3_17_volt_table),
	PM800_LDO(LDO18, LDO_ENA1_3, 1, 200000, ldo18_19_volt_table),
	PM800_LDO(LDO19, LDO_ENA1_3, 2, 200000, ldo18_19_volt_table),
};

#define PM800_REGULATOR_OF_MATCH(_name, _id)				\
	[PM800_ID_##_id] = {						\
		.name = #_name,						\
		.driver_data = &pm800_regulator_info[PM800_ID_##_id],	\
	}

static struct of_regulator_match pm800_regulator_matches[] = {
	PM800_REGULATOR_OF_MATCH(buck1, BUCK1),
	PM800_REGULATOR_OF_MATCH(buck2, BUCK2),
	PM800_REGULATOR_OF_MATCH(buck3, BUCK3),
	PM800_REGULATOR_OF_MATCH(buck4, BUCK4),
	PM800_REGULATOR_OF_MATCH(buck5, BUCK5),
	PM800_REGULATOR_OF_MATCH(ldo1, LDO1),
	PM800_REGULATOR_OF_MATCH(ldo2, LDO2),
	PM800_REGULATOR_OF_MATCH(ldo3, LDO3),
	PM800_REGULATOR_OF_MATCH(ldo4, LDO4),
	PM800_REGULATOR_OF_MATCH(ldo5, LDO5),
	PM800_REGULATOR_OF_MATCH(ldo6, LDO6),
	PM800_REGULATOR_OF_MATCH(ldo7, LDO7),
	PM800_REGULATOR_OF_MATCH(ldo8, LDO8),
	PM800_REGULATOR_OF_MATCH(ldo9, LDO9),
	PM800_REGULATOR_OF_MATCH(ldo10, LDO10),
	PM800_REGULATOR_OF_MATCH(ldo11, LDO11),
	PM800_REGULATOR_OF_MATCH(ldo12, LDO12),
	PM800_REGULATOR_OF_MATCH(ldo13, LDO13),
	PM800_REGULATOR_OF_MATCH(ldo14, LDO14),
	PM800_REGULATOR_OF_MATCH(ldo15, LDO15),
	PM800_REGULATOR_OF_MATCH(ldo16, LDO16),
	PM800_REGULATOR_OF_MATCH(ldo17, LDO17),
	PM800_REGULATOR_OF_MATCH(ldo18, LDO18),
	PM800_REGULATOR_OF_MATCH(ldo19, LDO19),
};

static int pm800_regulator_dt_init(struct platform_device *pdev)
{
	struct device_node *np = pdev->dev.of_node;
	int ret;

	ret = of_regulator_match(&pdev->dev, np,
				 pm800_regulator_matches,
				 ARRAY_SIZE(pm800_regulator_matches));
	if (ret < 0)
		return ret;

	return 0;
}

static int pm800_regulator_probe(struct platform_device *pdev)
{
	struct pm80x_chip *chip = dev_get_drvdata(pdev->dev.parent);
	struct pm80x_platform_data *pdata = dev_get_platdata(pdev->dev.parent);
	struct pm800_regulators *pm800_data;
	struct pm800_regulator_info *info;
	struct regulator_config config = { };
	struct regulator_init_data *init_data;
	int i, ret;

	if (!pdata || pdata->num_regulators == 0) {
		if (IS_ENABLED(CONFIG_OF)) {
			ret = pm800_regulator_dt_init(pdev);
			if (ret)
				return ret;
		} else {
			return -ENODEV;
		}
	} else if (pdata->num_regulators) {
		unsigned int count = 0;

		/* Check whether num_regulator is valid. */
		for (i = 0; i < ARRAY_SIZE(pdata->regulators); i++) {
			if (pdata->regulators[i])
				count++;
		}
		if (count != pdata->num_regulators)
			return -EINVAL;
	} else {
		return -EINVAL;
	}

	pm800_data = devm_kzalloc(&pdev->dev, sizeof(*pm800_data),
					GFP_KERNEL);
	if (!pm800_data) {
		dev_err(&pdev->dev, "Failed to allocate pm800_regualtors");
		return -ENOMEM;
	}

	pm800_data->map = chip->subchip->regmap_power;
	pm800_data->chip = chip;

	platform_set_drvdata(pdev, pm800_data);

	for (i = 0; i < PM800_ID_RG_MAX; i++) {
		if (!pdata || pdata->num_regulators == 0)
			init_data = pm800_regulator_matches[i].init_data;
		else
			init_data = pdata->regulators[i];
		if (!init_data)
			continue;
		info = pm800_regulator_matches[i].driver_data;
		config.dev = &pdev->dev;
		config.init_data = init_data;
		config.driver_data = info;
		config.regmap = pm800_data->map;
		config.of_node = pm800_regulator_matches[i].of_node;

		pm800_data->regulators[i] =
				regulator_register(&info->desc, &config);
		if (IS_ERR(pm800_data->regulators[i])) {
			ret = PTR_ERR(pm800_data->regulators[i]);
			dev_err(&pdev->dev, "Failed to register %s\n",
				info->desc.name);

			while (--i >= 0)
				regulator_unregister(pm800_data->regulators[i]);

			return ret;
		}
	}

	return 0;
}

static int pm800_regulator_remove(struct platform_device *pdev)
{
	struct pm800_regulators *pm800_data = platform_get_drvdata(pdev);
	int i;

	for (i = 0; i < PM800_ID_RG_MAX; i++)
		regulator_unregister(pm800_data->regulators[i]);

	return 0;
}

static struct platform_driver pm800_regulator_driver = {
	.driver		= {
		.name	= "88pm80x-regulator",
		.owner	= THIS_MODULE,
	},
	.probe		= pm800_regulator_probe,
	.remove		= pm800_regulator_remove,
};

module_platform_driver(pm800_regulator_driver);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Joseph(Yossi) Hanin <yhanin@marvell.com>");
MODULE_DESCRIPTION("Regulator Driver for Marvell 88PM800 PMIC");
MODULE_ALIAS("platform:88pm800-regulator");
OpenPOWER on IntegriCloud