summaryrefslogtreecommitdiffstats
path: root/drivers/regulator/tps65218-regulator.c
blob: a5e5634eeb9e493067b73e440ee11caee3c346f9 (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
/*
 * tps65218-regulator.c
 *
 * Regulator driver for TPS65218 PMIC
 *
 * Copyright (C) 2014 Texas Instruments Incorporated - http://www.ti.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.
 *
 * This program is distributed "as is" WITHOUT ANY WARRANTY of any
 * kind, whether expressed or implied; without even the implied warranty
 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License version 2 for more details.
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/device.h>
#include <linux/init.h>
#include <linux/err.h>
#include <linux/platform_device.h>
#include <linux/of_device.h>
#include <linux/regulator/of_regulator.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/mfd/tps65218.h>

enum tps65218_regulators { DCDC1, DCDC2, DCDC3, DCDC4,
			   DCDC5, DCDC6, LDO1, LS3 };

#define TPS65218_REGULATOR(_name, _id, _type, _ops, _n, _vr, _vm, _er, _em, \
			    _cr, _cm, _lr, _nlr, _delay, _fuv)		\
	{							\
		.name			= _name,		\
		.id			= _id,			\
		.ops			= &_ops,		\
		.n_voltages		= _n,			\
		.type			= _type,	\
		.owner			= THIS_MODULE,		\
		.vsel_reg		= _vr,			\
		.vsel_mask		= _vm,			\
		.csel_reg		= _cr,			\
		.csel_mask		= _cm,			\
		.enable_reg		= _er,			\
		.enable_mask		= _em,			\
		.volt_table		= NULL,			\
		.linear_ranges		= _lr,			\
		.n_linear_ranges	= _nlr,			\
		.ramp_delay		= _delay,		\
		.fixed_uV		= _fuv			\
	}							\

#define TPS65218_INFO(_id, _nm, _min, _max)	\
	[_id] = {					\
		.id		= _id,			\
		.name		= _nm,			\
		.min_uV		= _min,			\
		.max_uV		= _max,			\
	}

static const struct regulator_linear_range dcdc1_dcdc2_ranges[] = {
	REGULATOR_LINEAR_RANGE(850000, 0x0, 0x32, 10000),
	REGULATOR_LINEAR_RANGE(1375000, 0x33, 0x3f, 25000),
};

static const struct regulator_linear_range ldo1_dcdc3_ranges[] = {
	REGULATOR_LINEAR_RANGE(900000, 0x0, 0x1a, 25000),
	REGULATOR_LINEAR_RANGE(1600000, 0x1b, 0x3f, 50000),
};

static const struct regulator_linear_range dcdc4_ranges[] = {
	REGULATOR_LINEAR_RANGE(1175000, 0x0, 0xf, 25000),
	REGULATOR_LINEAR_RANGE(1600000, 0x10, 0x34, 50000),
};

static struct tps_info tps65218_pmic_regs[] = {
	TPS65218_INFO(DCDC1, "DCDC1", 850000, 1675000),
	TPS65218_INFO(DCDC2, "DCDC2", 850000, 1675000),
	TPS65218_INFO(DCDC3, "DCDC3", 900000, 3400000),
	TPS65218_INFO(DCDC4, "DCDC4", 1175000, 3400000),
	TPS65218_INFO(DCDC5, "DCDC5", 1000000, 1000000),
	TPS65218_INFO(DCDC6, "DCDC6", 1800000, 1800000),
	TPS65218_INFO(LDO1, "LDO1", 900000, 3400000),
	TPS65218_INFO(LS3, "LS3", -1, -1),
};

#define TPS65218_OF_MATCH(comp, label) \
	{ \
		.compatible = comp, \
		.data = &label, \
	}

static const struct of_device_id tps65218_of_match[] = {
	TPS65218_OF_MATCH("ti,tps65218-dcdc1", tps65218_pmic_regs[DCDC1]),
	TPS65218_OF_MATCH("ti,tps65218-dcdc2", tps65218_pmic_regs[DCDC2]),
	TPS65218_OF_MATCH("ti,tps65218-dcdc3", tps65218_pmic_regs[DCDC3]),
	TPS65218_OF_MATCH("ti,tps65218-dcdc4", tps65218_pmic_regs[DCDC4]),
	TPS65218_OF_MATCH("ti,tps65218-dcdc5", tps65218_pmic_regs[DCDC5]),
	TPS65218_OF_MATCH("ti,tps65218-dcdc6", tps65218_pmic_regs[DCDC6]),
	TPS65218_OF_MATCH("ti,tps65218-ldo1", tps65218_pmic_regs[LDO1]),
	TPS65218_OF_MATCH("ti,tps65218-ls3", tps65218_pmic_regs[LS3]),
	{ }
};
MODULE_DEVICE_TABLE(of, tps65218_of_match);

static int tps65218_pmic_set_voltage_sel(struct regulator_dev *dev,
					 unsigned selector)
{
	int ret;
	struct tps65218 *tps = rdev_get_drvdata(dev);
	unsigned int rid = rdev_get_id(dev);

	/* Set the voltage based on vsel value and write protect level is 2 */
	ret = tps65218_set_bits(tps, dev->desc->vsel_reg, dev->desc->vsel_mask,
				selector, TPS65218_PROTECT_L1);

	/* Set GO bit for DCDC1/2 to initiate voltage transistion */
	switch (rid) {
	case TPS65218_DCDC_1:
	case TPS65218_DCDC_2:
		ret = tps65218_set_bits(tps, TPS65218_REG_CONTRL_SLEW_RATE,
					TPS65218_SLEW_RATE_GO,
					TPS65218_SLEW_RATE_GO,
					TPS65218_PROTECT_L1);
		break;
	}

	return ret;
}

static int tps65218_pmic_enable(struct regulator_dev *dev)
{
	struct tps65218 *tps = rdev_get_drvdata(dev);
	int rid = rdev_get_id(dev);

	if (rid < TPS65218_DCDC_1 || rid > TPS65218_LDO_1)
		return -EINVAL;

	/* Enable the regulator and password protection is level 1 */
	return tps65218_set_bits(tps, dev->desc->enable_reg,
				 dev->desc->enable_mask, dev->desc->enable_mask,
				 TPS65218_PROTECT_L1);
}

static int tps65218_pmic_disable(struct regulator_dev *dev)
{
	struct tps65218 *tps = rdev_get_drvdata(dev);
	int rid = rdev_get_id(dev);

	if (rid < TPS65218_DCDC_1 || rid > TPS65218_LDO_1)
		return -EINVAL;

	/* Disable the regulator and password protection is level 1 */
	return tps65218_clear_bits(tps, dev->desc->enable_reg,
				   dev->desc->enable_mask, TPS65218_PROTECT_L1);
}

/* Operations permitted on DCDC1, DCDC2 */
static struct regulator_ops tps65218_dcdc12_ops = {
	.is_enabled		= regulator_is_enabled_regmap,
	.enable			= tps65218_pmic_enable,
	.disable		= tps65218_pmic_disable,
	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
	.set_voltage_sel	= tps65218_pmic_set_voltage_sel,
	.list_voltage		= regulator_list_voltage_linear_range,
	.map_voltage		= regulator_map_voltage_linear_range,
	.set_voltage_time_sel	= regulator_set_voltage_time_sel,
};

/* Operations permitted on DCDC3, DCDC4 and LDO1 */
static struct regulator_ops tps65218_ldo1_dcdc34_ops = {
	.is_enabled		= regulator_is_enabled_regmap,
	.enable			= tps65218_pmic_enable,
	.disable		= tps65218_pmic_disable,
	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
	.set_voltage_sel	= tps65218_pmic_set_voltage_sel,
	.list_voltage		= regulator_list_voltage_linear_range,
	.map_voltage		= regulator_map_voltage_linear_range,
};

static const int ls3_currents[] = { 100, 200, 500, 1000 };

static int tps65218_pmic_set_input_current_lim(struct regulator_dev *dev,
					       int lim_uA)
{
	unsigned int index = 0;
	unsigned int num_currents = ARRAY_SIZE(ls3_currents);
	struct tps65218 *tps = rdev_get_drvdata(dev);

	while (index < num_currents && ls3_currents[index] != lim_uA)
		index++;

	if (index == num_currents)
		return -EINVAL;

	return tps65218_set_bits(tps, dev->desc->csel_reg, dev->desc->csel_mask,
				 index << 2, TPS65218_PROTECT_L1);
}

static int tps65218_pmic_set_current_limit(struct regulator_dev *dev,
					   int min_uA, int max_uA)
{
	int index = 0;
	unsigned int num_currents = ARRAY_SIZE(ls3_currents);
	struct tps65218 *tps = rdev_get_drvdata(dev);

	while (index < num_currents && ls3_currents[index] < max_uA)
		index++;

	index--;

	if (index < 0 || ls3_currents[index] < min_uA)
		return -EINVAL;

	return tps65218_set_bits(tps, dev->desc->csel_reg, dev->desc->csel_mask,
				 index << 2, TPS65218_PROTECT_L1);
}

static int tps65218_pmic_get_current_limit(struct regulator_dev *dev)
{
	int retval;
	unsigned int index;
	struct tps65218 *tps = rdev_get_drvdata(dev);

	retval = tps65218_reg_read(tps, dev->desc->csel_reg, &index);
	if (retval < 0)
		return retval;

	index = (index & dev->desc->csel_mask) >> 2;

	return ls3_currents[index];
}

static struct regulator_ops tps65218_ls3_ops = {
	.is_enabled		= regulator_is_enabled_regmap,
	.enable			= tps65218_pmic_enable,
	.disable		= tps65218_pmic_disable,
	.set_input_current_limit = tps65218_pmic_set_input_current_lim,
	.set_current_limit	= tps65218_pmic_set_current_limit,
	.get_current_limit	= tps65218_pmic_get_current_limit,
};

/* Operations permitted on DCDC5, DCDC6 */
static struct regulator_ops tps65218_dcdc56_pmic_ops = {
	.is_enabled		= regulator_is_enabled_regmap,
	.enable			= tps65218_pmic_enable,
	.disable		= tps65218_pmic_disable,
};

static const struct regulator_desc regulators[] = {
	TPS65218_REGULATOR("DCDC1", TPS65218_DCDC_1, REGULATOR_VOLTAGE,
			   tps65218_dcdc12_ops, 64, TPS65218_REG_CONTROL_DCDC1,
			   TPS65218_CONTROL_DCDC1_MASK, TPS65218_REG_ENABLE1,
			   TPS65218_ENABLE1_DC1_EN, 0, 0, dcdc1_dcdc2_ranges,
			   2, 4000, 0),
	TPS65218_REGULATOR("DCDC2", TPS65218_DCDC_2, REGULATOR_VOLTAGE,
			   tps65218_dcdc12_ops, 64, TPS65218_REG_CONTROL_DCDC2,
			   TPS65218_CONTROL_DCDC2_MASK, TPS65218_REG_ENABLE1,
			   TPS65218_ENABLE1_DC2_EN, 0, 0, dcdc1_dcdc2_ranges,
			   2, 4000, 0),
	TPS65218_REGULATOR("DCDC3", TPS65218_DCDC_3, REGULATOR_VOLTAGE,
			   tps65218_ldo1_dcdc34_ops, 64,
			   TPS65218_REG_CONTROL_DCDC3,
			   TPS65218_CONTROL_DCDC3_MASK, TPS65218_REG_ENABLE1,
			   TPS65218_ENABLE1_DC3_EN, 0, 0, ldo1_dcdc3_ranges, 2,
			   0, 0),
	TPS65218_REGULATOR("DCDC4", TPS65218_DCDC_4, REGULATOR_VOLTAGE,
			   tps65218_ldo1_dcdc34_ops, 53,
			   TPS65218_REG_CONTROL_DCDC4,
			   TPS65218_CONTROL_DCDC4_MASK, TPS65218_REG_ENABLE1,
			   TPS65218_ENABLE1_DC4_EN, 0, 0, dcdc4_ranges, 2,
			   0, 0),
	TPS65218_REGULATOR("DCDC5", TPS65218_DCDC_5, REGULATOR_VOLTAGE,
			   tps65218_dcdc56_pmic_ops, 1, -1, -1,
			   TPS65218_REG_ENABLE1, TPS65218_ENABLE1_DC5_EN, 0, 0,
			   NULL, 0, 0, 1000000),
	TPS65218_REGULATOR("DCDC6", TPS65218_DCDC_6, REGULATOR_VOLTAGE,
			   tps65218_dcdc56_pmic_ops, 1, -1, -1,
			   TPS65218_REG_ENABLE1, TPS65218_ENABLE1_DC6_EN, 0, 0,
			   NULL, 0, 0, 1800000),
	TPS65218_REGULATOR("LDO1", TPS65218_LDO_1, REGULATOR_VOLTAGE,
			   tps65218_ldo1_dcdc34_ops, 64,
			   TPS65218_REG_CONTROL_LDO1,
			   TPS65218_CONTROL_LDO1_MASK, TPS65218_REG_ENABLE2,
			   TPS65218_ENABLE2_LDO1_EN, 0, 0, ldo1_dcdc3_ranges,
			   2, 0, 0),
	TPS65218_REGULATOR("LS3", TPS65218_LS_3, REGULATOR_CURRENT,
			   tps65218_ls3_ops, 0, 0, 0, TPS65218_REG_ENABLE2,
			   TPS65218_ENABLE2_LS3_EN, TPS65218_REG_CONFIG2,
			   TPS65218_CONFIG2_LS3ILIM_MASK, NULL, 0, 0, 0),
};

static int tps65218_regulator_probe(struct platform_device *pdev)
{
	struct tps65218 *tps = dev_get_drvdata(pdev->dev.parent);
	struct regulator_init_data *init_data;
	const struct tps_info	*template;
	struct regulator_dev *rdev;
	const struct of_device_id	*match;
	struct regulator_config config = { };
	int id;

	match = of_match_device(tps65218_of_match, &pdev->dev);
	if (!match)
		return -ENODEV;

	template = match->data;
	id = template->id;
	init_data = of_get_regulator_init_data(&pdev->dev, pdev->dev.of_node,
					       &regulators[id]);

	platform_set_drvdata(pdev, tps);

	tps->info[id] = &tps65218_pmic_regs[id];
	config.dev = &pdev->dev;
	config.init_data = init_data;
	config.driver_data = tps;
	config.regmap = tps->regmap;
	config.of_node = pdev->dev.of_node;

	rdev = devm_regulator_register(&pdev->dev, &regulators[id], &config);
	if (IS_ERR(rdev)) {
		dev_err(tps->dev, "failed to register %s regulator\n",
			pdev->name);
		return PTR_ERR(rdev);
	}

	return 0;
}

static struct platform_driver tps65218_regulator_driver = {
	.driver = {
		.name = "tps65218-pmic",
		.of_match_table = tps65218_of_match,
	},
	.probe = tps65218_regulator_probe,
};

module_platform_driver(tps65218_regulator_driver);

MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>");
MODULE_DESCRIPTION("TPS65218 voltage regulator driver");
MODULE_ALIAS("platform:tps65218-pmic");
MODULE_LICENSE("GPL v2");