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Mark Brown1910efa2012-06-23 13:07:57 +01001/*
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>
Arnd Bergmann7b22b9a2014-05-27 17:27:34 +010019#include <linux/of.h>
Linus Walleije1739e82018-05-14 10:06:24 +020020#include <linux/gpio/consumer.h>
Mark Brown1910efa2012-06-23 13:07:57 +010021#include <linux/platform_device.h>
22#include <linux/regulator/driver.h>
23#include <linux/regulator/machine.h>
Charles Keepax2cce4be2014-04-16 10:01:39 +010024#include <linux/regulator/of_regulator.h>
Mark Brown1910efa2012-06-23 13:07:57 +010025#include <linux/slab.h>
26
Richard Fitzgeraldaaa84e62017-04-18 11:43:52 +010027#include <linux/regulator/arizona-ldo1.h>
28
Mark Brown1910efa2012-06-23 13:07:57 +010029#include <linux/mfd/arizona/core.h>
30#include <linux/mfd/arizona/pdata.h>
31#include <linux/mfd/arizona/registers.h>
32
33struct arizona_ldo1 {
34 struct regulator_dev *regulator;
Richard Fitzgerald80a55f42017-04-18 11:43:53 +010035 struct regmap *regmap;
Mark Brown1910efa2012-06-23 13:07:57 +010036
37 struct regulator_consumer_supply supply;
38 struct regulator_init_data init_data;
Charles Keepaxa9191572018-06-19 16:10:00 +010039
40 struct gpio_desc *ena_gpiod;
Mark Brown1910efa2012-06-23 13:07:57 +010041};
42
Mark Brown73ee2942012-11-27 18:48:33 +000043static int arizona_ldo1_hc_set_voltage_sel(struct regulator_dev *rdev,
44 unsigned sel)
45{
Axel Lin5db2efb2019-02-25 17:13:49 +080046 struct regmap *regmap = rdev_get_regmap(rdev);
Mark Brown73ee2942012-11-27 18:48:33 +000047 unsigned int val;
48 int ret;
49
50 if (sel == rdev->desc->n_voltages - 1)
51 val = ARIZONA_LDO1_HI_PWR;
52 else
53 val = 0;
54
55 ret = regmap_update_bits(regmap, ARIZONA_LDO1_CONTROL_2,
56 ARIZONA_LDO1_HI_PWR, val);
57 if (ret != 0)
58 return ret;
59
Mark Brown73ee2942012-11-27 18:48:33 +000060 if (val)
61 return 0;
62
Axel Lin5db2efb2019-02-25 17:13:49 +080063 return regulator_set_voltage_sel_regmap(rdev, sel);
Mark Brown73ee2942012-11-27 18:48:33 +000064}
65
66static int arizona_ldo1_hc_get_voltage_sel(struct regulator_dev *rdev)
67{
Axel Lin5db2efb2019-02-25 17:13:49 +080068 struct regmap *regmap = rdev_get_regmap(rdev);
Mark Brown73ee2942012-11-27 18:48:33 +000069 unsigned int val;
70 int ret;
71
72 ret = regmap_read(regmap, ARIZONA_LDO1_CONTROL_2, &val);
73 if (ret != 0)
74 return ret;
75
76 if (val & ARIZONA_LDO1_HI_PWR)
77 return rdev->desc->n_voltages - 1;
78
Axel Lin5db2efb2019-02-25 17:13:49 +080079 return regulator_get_voltage_sel_regmap(rdev);
Mark Brown73ee2942012-11-27 18:48:33 +000080}
81
Bhumika Goyal03d06102017-01-28 19:08:41 +053082static const struct regulator_ops arizona_ldo1_hc_ops = {
Axel Lin37b9ef92019-01-19 20:36:36 +080083 .list_voltage = regulator_list_voltage_linear_range,
84 .map_voltage = regulator_map_voltage_linear_range,
Mark Brown73ee2942012-11-27 18:48:33 +000085 .get_voltage_sel = arizona_ldo1_hc_get_voltage_sel,
86 .set_voltage_sel = arizona_ldo1_hc_set_voltage_sel,
87 .get_bypass = regulator_get_bypass_regmap,
88 .set_bypass = regulator_set_bypass_regmap,
89};
90
Axel Lin37b9ef92019-01-19 20:36:36 +080091static const struct regulator_linear_range arizona_ldo1_hc_ranges[] = {
92 REGULATOR_LINEAR_RANGE(900000, 0, 0x6, 50000),
93 REGULATOR_LINEAR_RANGE(1800000, 0x7, 0x7, 0),
94};
95
Mark Brown73ee2942012-11-27 18:48:33 +000096static const struct regulator_desc arizona_ldo1_hc = {
97 .name = "LDO1",
98 .supply_name = "LDOVDD",
99 .type = REGULATOR_VOLTAGE,
100 .ops = &arizona_ldo1_hc_ops,
101
Axel Lin5db2efb2019-02-25 17:13:49 +0800102 .vsel_reg = ARIZONA_LDO1_CONTROL_1,
103 .vsel_mask = ARIZONA_LDO1_VSEL_MASK,
Mark Brown73ee2942012-11-27 18:48:33 +0000104 .bypass_reg = ARIZONA_LDO1_CONTROL_1,
105 .bypass_mask = ARIZONA_LDO1_BYPASS,
Axel Lin37b9ef92019-01-19 20:36:36 +0800106 .linear_ranges = arizona_ldo1_hc_ranges,
107 .n_linear_ranges = ARRAY_SIZE(arizona_ldo1_hc_ranges),
Mark Brown73ee2942012-11-27 18:48:33 +0000108 .n_voltages = 8,
Mark Brownce1bcb72013-03-26 12:02:32 +0000109 .enable_time = 1500,
Charles Keepax88f0e3a2016-10-21 14:47:42 +0100110 .ramp_delay = 24000,
Mark Brown73ee2942012-11-27 18:48:33 +0000111
112 .owner = THIS_MODULE,
113};
114
Bhumika Goyal03d06102017-01-28 19:08:41 +0530115static const struct regulator_ops arizona_ldo1_ops = {
Mark Brown1910efa2012-06-23 13:07:57 +0100116 .list_voltage = regulator_list_voltage_linear,
117 .map_voltage = regulator_map_voltage_linear,
118 .get_voltage_sel = regulator_get_voltage_sel_regmap,
119 .set_voltage_sel = regulator_set_voltage_sel_regmap,
120};
121
122static const struct regulator_desc arizona_ldo1 = {
123 .name = "LDO1",
124 .supply_name = "LDOVDD",
125 .type = REGULATOR_VOLTAGE,
126 .ops = &arizona_ldo1_ops,
127
128 .vsel_reg = ARIZONA_LDO1_CONTROL_1,
129 .vsel_mask = ARIZONA_LDO1_VSEL_MASK,
130 .min_uV = 900000,
Charles Keepaxa35ff282014-03-18 10:49:17 +0000131 .uV_step = 25000,
132 .n_voltages = 13,
Mark Brown86a14502012-11-27 17:02:29 +0000133 .enable_time = 500,
Charles Keepax88f0e3a2016-10-21 14:47:42 +0100134 .ramp_delay = 24000,
Mark Brown1910efa2012-06-23 13:07:57 +0100135
136 .owner = THIS_MODULE,
137};
138
Mark Brown55a18ae2012-11-27 17:51:46 +0000139static const struct regulator_init_data arizona_ldo1_dvfs = {
140 .constraints = {
141 .min_uV = 1200000,
142 .max_uV = 1800000,
143 .valid_ops_mask = REGULATOR_CHANGE_STATUS |
144 REGULATOR_CHANGE_VOLTAGE,
145 },
146 .num_consumer_supplies = 1,
147};
148
Mark Brown1910efa2012-06-23 13:07:57 +0100149static const struct regulator_init_data arizona_ldo1_default = {
Mark Browna9905b12012-06-27 14:32:06 +0100150 .constraints = {
151 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
152 },
Mark Brown1910efa2012-06-23 13:07:57 +0100153 .num_consumer_supplies = 1,
154};
155
Charles Keepax9a6c2fe2015-05-11 13:58:07 +0100156static const struct regulator_init_data arizona_ldo1_wm5110 = {
157 .constraints = {
158 .min_uV = 1175000,
159 .max_uV = 1200000,
160 .valid_ops_mask = REGULATOR_CHANGE_STATUS |
161 REGULATOR_CHANGE_VOLTAGE,
162 },
163 .num_consumer_supplies = 1,
164};
165
Richard Fitzgeraldaaa84e62017-04-18 11:43:52 +0100166static int arizona_ldo1_of_get_pdata(struct arizona_ldo1_pdata *pdata,
Javier Martinez Canillas072e78b2014-11-10 14:43:53 +0100167 struct regulator_config *config,
Richard Fitzgeraldaaa84e62017-04-18 11:43:52 +0100168 const struct regulator_desc *desc,
169 bool *external_dcvdd)
Charles Keepax4a8c4752014-04-16 10:01:38 +0100170{
Charles Keepax2cce4be2014-04-16 10:01:39 +0100171 struct arizona_ldo1 *ldo1 = config->driver_data;
Richard Fitzgeraldaaa84e62017-04-18 11:43:52 +0100172 struct device_node *np = config->dev->of_node;
Charles Keepax2cce4be2014-04-16 10:01:39 +0100173 struct device_node *init_node, *dcvdd_node;
174 struct regulator_init_data *init_data;
Charles Keepax4a8c4752014-04-16 10:01:38 +0100175
Charles Keepaxce938002015-10-15 10:37:12 +0100176 init_node = of_get_child_by_name(np, "ldo1");
177 dcvdd_node = of_parse_phandle(np, "DCVDD-supply", 0);
Charles Keepax2cce4be2014-04-16 10:01:39 +0100178
179 if (init_node) {
180 config->of_node = init_node;
181
Richard Fitzgeraldaaa84e62017-04-18 11:43:52 +0100182 init_data = of_get_regulator_init_data(config->dev, init_node,
183 desc);
Charles Keepax2cce4be2014-04-16 10:01:39 +0100184 if (init_data) {
185 init_data->consumer_supplies = &ldo1->supply;
186 init_data->num_consumer_supplies = 1;
187
188 if (dcvdd_node && dcvdd_node != init_node)
Richard Fitzgeraldaaa84e62017-04-18 11:43:52 +0100189 *external_dcvdd = true;
Charles Keepax2cce4be2014-04-16 10:01:39 +0100190
Richard Fitzgeraldaaa84e62017-04-18 11:43:52 +0100191 pdata->init_data = init_data;
Charles Keepax2cce4be2014-04-16 10:01:39 +0100192 }
193 } else if (dcvdd_node) {
Richard Fitzgeraldaaa84e62017-04-18 11:43:52 +0100194 *external_dcvdd = true;
Charles Keepax2cce4be2014-04-16 10:01:39 +0100195 }
196
197 of_node_put(dcvdd_node);
198
Charles Keepax4a8c4752014-04-16 10:01:38 +0100199 return 0;
200}
201
Richard Fitzgeraldaf367af2017-04-18 11:43:54 +0100202static int arizona_ldo1_common_init(struct platform_device *pdev,
203 struct arizona_ldo1 *ldo1,
204 const struct regulator_desc *desc,
205 struct arizona_ldo1_pdata *pdata,
206 bool *external_dcvdd)
207{
208 struct device *parent_dev = pdev->dev.parent;
209 struct regulator_config config = { };
210 int ret;
211
212 *external_dcvdd = false;
213
214 ldo1->supply.supply = "DCVDD";
215 ldo1->init_data.consumer_supplies = &ldo1->supply;
216 ldo1->supply.dev_name = dev_name(parent_dev);
217
218 config.dev = parent_dev;
219 config.driver_data = ldo1;
220 config.regmap = ldo1->regmap;
221
222 if (IS_ENABLED(CONFIG_OF)) {
223 if (!dev_get_platdata(parent_dev)) {
224 ret = arizona_ldo1_of_get_pdata(pdata,
225 &config, desc,
226 external_dcvdd);
227 if (ret < 0)
228 return ret;
229 }
230 }
231
Charles Keepaxa9191572018-06-19 16:10:00 +0100232 /* We assume that high output = regulator off
233 * Don't use devm, since we need to get against the parent device
234 * so clean up would happen at the wrong time
235 */
236 config.ena_gpiod = gpiod_get_optional(parent_dev, "wlf,ldoena",
Linus Walleij63239e42018-10-15 11:02:40 +0200237 GPIOD_OUT_LOW | GPIOD_FLAGS_BIT_NONEXCLUSIVE);
Linus Walleije1739e82018-05-14 10:06:24 +0200238 if (IS_ERR(config.ena_gpiod))
239 return PTR_ERR(config.ena_gpiod);
Richard Fitzgeraldaf367af2017-04-18 11:43:54 +0100240
Charles Keepaxa9191572018-06-19 16:10:00 +0100241 ldo1->ena_gpiod = config.ena_gpiod;
242
Richard Fitzgeraldaf367af2017-04-18 11:43:54 +0100243 if (pdata->init_data)
244 config.init_data = pdata->init_data;
245 else
246 config.init_data = &ldo1->init_data;
247
248 /*
249 * LDO1 can only be used to supply DCVDD so if it has no
250 * consumers then DCVDD is supplied externally.
251 */
252 if (config.init_data->num_consumer_supplies == 0)
253 *external_dcvdd = true;
254
255 ldo1->regulator = devm_regulator_register(&pdev->dev, desc, &config);
256
257 of_node_put(config.of_node);
258
259 if (IS_ERR(ldo1->regulator)) {
260 ret = PTR_ERR(ldo1->regulator);
261 dev_err(&pdev->dev, "Failed to register LDO1 supply: %d\n",
262 ret);
263 return ret;
264 }
265
266 platform_set_drvdata(pdev, ldo1);
267
268 return 0;
269}
270
Bill Pembertona5023572012-11-19 13:22:22 -0500271static int arizona_ldo1_probe(struct platform_device *pdev)
Mark Brown1910efa2012-06-23 13:07:57 +0100272{
273 struct arizona *arizona = dev_get_drvdata(pdev->dev.parent);
Mark Brown1910efa2012-06-23 13:07:57 +0100274 struct arizona_ldo1 *ldo1;
Richard Fitzgeraldaf367af2017-04-18 11:43:54 +0100275 const struct regulator_desc *desc;
276 bool external_dcvdd;
Mark Brown1910efa2012-06-23 13:07:57 +0100277 int ret;
278
279 ldo1 = devm_kzalloc(&pdev->dev, sizeof(*ldo1), GFP_KERNEL);
Sachin Kamatf4a6c5b2014-02-18 16:11:09 +0530280 if (!ldo1)
Mark Brown1910efa2012-06-23 13:07:57 +0100281 return -ENOMEM;
Mark Brown1910efa2012-06-23 13:07:57 +0100282
Richard Fitzgerald80a55f42017-04-18 11:43:53 +0100283 ldo1->regmap = arizona->regmap;
Mark Brown1910efa2012-06-23 13:07:57 +0100284
285 /*
286 * Since the chip usually supplies itself we provide some
287 * default init_data for it. This will be overridden with
288 * platform data if provided.
289 */
Mark Brown55a18ae2012-11-27 17:51:46 +0000290 switch (arizona->type) {
291 case WM5102:
Charles Keepaxa35ff282014-03-18 10:49:17 +0000292 case WM8997:
Richard Fitzgerald33aa3802015-09-28 14:01:07 +0100293 case WM8998:
294 case WM1814:
Mark Brown73ee2942012-11-27 18:48:33 +0000295 desc = &arizona_ldo1_hc;
Mark Brown55a18ae2012-11-27 17:51:46 +0000296 ldo1->init_data = arizona_ldo1_dvfs;
297 break;
Charles Keepax9a6c2fe2015-05-11 13:58:07 +0100298 case WM5110:
299 case WM8280:
300 desc = &arizona_ldo1;
301 ldo1->init_data = arizona_ldo1_wm5110;
302 break;
Mark Brown55a18ae2012-11-27 17:51:46 +0000303 default:
Mark Brown73ee2942012-11-27 18:48:33 +0000304 desc = &arizona_ldo1;
Mark Brown55a18ae2012-11-27 17:51:46 +0000305 ldo1->init_data = arizona_ldo1_default;
306 break;
307 }
308
Richard Fitzgeraldaf367af2017-04-18 11:43:54 +0100309 ret = arizona_ldo1_common_init(pdev, ldo1, desc,
310 &arizona->pdata.ldo1,
311 &external_dcvdd);
312 if (ret == 0)
Richard Fitzgeraldaaa84e62017-04-18 11:43:52 +0100313 arizona->external_dcvdd = external_dcvdd;
Charles Keepax4a8c4752014-04-16 10:01:38 +0100314
Richard Fitzgeraldaf367af2017-04-18 11:43:54 +0100315 return ret;
Mark Brown1910efa2012-06-23 13:07:57 +0100316}
317
Charles Keepaxa9191572018-06-19 16:10:00 +0100318static int arizona_ldo1_remove(struct platform_device *pdev)
319{
320 struct arizona_ldo1 *ldo1 = platform_get_drvdata(pdev);
321
322 if (ldo1->ena_gpiod)
323 gpiod_put(ldo1->ena_gpiod);
324
325 return 0;
326}
327
Mark Brown1910efa2012-06-23 13:07:57 +0100328static struct platform_driver arizona_ldo1_driver = {
329 .probe = arizona_ldo1_probe,
Charles Keepaxa9191572018-06-19 16:10:00 +0100330 .remove = arizona_ldo1_remove,
Mark Brown1910efa2012-06-23 13:07:57 +0100331 .driver = {
332 .name = "arizona-ldo1",
Mark Brown1910efa2012-06-23 13:07:57 +0100333 },
334};
335
336module_platform_driver(arizona_ldo1_driver);
337
338/* Module information */
339MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
340MODULE_DESCRIPTION("Arizona LDO1 driver");
341MODULE_LICENSE("GPL");
342MODULE_ALIAS("platform:arizona-ldo1");