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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>
19#include <linux/platform_device.h>
20#include <linux/regulator/driver.h>
21#include <linux/regulator/machine.h>
22#include <linux/gpio.h>
23#include <linux/slab.h>
24
25#include <linux/mfd/arizona/core.h>
26#include <linux/mfd/arizona/pdata.h>
27#include <linux/mfd/arizona/registers.h>
28
29struct arizona_ldo1 {
30 struct regulator_dev *regulator;
31 struct arizona *arizona;
32
33 struct regulator_consumer_supply supply;
34 struct regulator_init_data init_data;
35};
36
Mark Brown73ee2942012-11-27 18:48:33 +000037static int arizona_ldo1_hc_list_voltage(struct regulator_dev *rdev,
38 unsigned int selector)
39{
40 if (selector >= rdev->desc->n_voltages)
41 return -EINVAL;
42
43 if (selector == rdev->desc->n_voltages - 1)
44 return 1800000;
45 else
46 return rdev->desc->min_uV + (rdev->desc->uV_step * selector);
47}
48
49static int arizona_ldo1_hc_map_voltage(struct regulator_dev *rdev,
50 int min_uV, int max_uV)
51{
52 int sel;
53
54 sel = DIV_ROUND_UP(min_uV - rdev->desc->min_uV, rdev->desc->uV_step);
55 if (sel >= rdev->desc->n_voltages)
56 sel = rdev->desc->n_voltages - 1;
57
58 return sel;
59}
60
61static int arizona_ldo1_hc_set_voltage_sel(struct regulator_dev *rdev,
62 unsigned sel)
63{
64 struct arizona_ldo1 *ldo = rdev_get_drvdata(rdev);
65 struct regmap *regmap = ldo->arizona->regmap;
66 unsigned int val;
67 int ret;
68
69 if (sel == rdev->desc->n_voltages - 1)
70 val = ARIZONA_LDO1_HI_PWR;
71 else
72 val = 0;
73
74 ret = regmap_update_bits(regmap, ARIZONA_LDO1_CONTROL_2,
75 ARIZONA_LDO1_HI_PWR, val);
76 if (ret != 0)
77 return ret;
78
79 ret = regmap_update_bits(regmap, ARIZONA_DYNAMIC_FREQUENCY_SCALING_1,
80 ARIZONA_SUBSYS_MAX_FREQ, val);
81 if (ret != 0)
82 return ret;
83
84 if (val)
85 return 0;
86
87 val = sel << ARIZONA_LDO1_VSEL_SHIFT;
88
89 return regmap_update_bits(regmap, ARIZONA_LDO1_CONTROL_1,
90 ARIZONA_LDO1_VSEL_MASK, val);
91}
92
93static int arizona_ldo1_hc_get_voltage_sel(struct regulator_dev *rdev)
94{
95 struct arizona_ldo1 *ldo = rdev_get_drvdata(rdev);
96 struct regmap *regmap = ldo->arizona->regmap;
97 unsigned int val;
98 int ret;
99
100 ret = regmap_read(regmap, ARIZONA_LDO1_CONTROL_2, &val);
101 if (ret != 0)
102 return ret;
103
104 if (val & ARIZONA_LDO1_HI_PWR)
105 return rdev->desc->n_voltages - 1;
106
107 ret = regmap_read(regmap, ARIZONA_LDO1_CONTROL_1, &val);
108 if (ret != 0)
109 return ret;
110
111 return (val & ARIZONA_LDO1_VSEL_MASK) >> ARIZONA_LDO1_VSEL_SHIFT;
112}
113
114static struct regulator_ops arizona_ldo1_hc_ops = {
115 .list_voltage = arizona_ldo1_hc_list_voltage,
116 .map_voltage = arizona_ldo1_hc_map_voltage,
117 .get_voltage_sel = arizona_ldo1_hc_get_voltage_sel,
118 .set_voltage_sel = arizona_ldo1_hc_set_voltage_sel,
119 .get_bypass = regulator_get_bypass_regmap,
120 .set_bypass = regulator_set_bypass_regmap,
121};
122
123static const struct regulator_desc arizona_ldo1_hc = {
124 .name = "LDO1",
125 .supply_name = "LDOVDD",
126 .type = REGULATOR_VOLTAGE,
127 .ops = &arizona_ldo1_hc_ops,
128
129 .bypass_reg = ARIZONA_LDO1_CONTROL_1,
130 .bypass_mask = ARIZONA_LDO1_BYPASS,
131 .min_uV = 900000,
132 .uV_step = 50000,
133 .n_voltages = 8,
Mark Brownce1bcb72013-03-26 12:02:32 +0000134 .enable_time = 1500,
Mark Brown73ee2942012-11-27 18:48:33 +0000135
136 .owner = THIS_MODULE,
137};
138
Mark Brown1910efa2012-06-23 13:07:57 +0100139static struct regulator_ops arizona_ldo1_ops = {
140 .list_voltage = regulator_list_voltage_linear,
141 .map_voltage = regulator_map_voltage_linear,
142 .get_voltage_sel = regulator_get_voltage_sel_regmap,
143 .set_voltage_sel = regulator_set_voltage_sel_regmap,
Mark Brown9a17de02012-08-27 16:04:35 -0700144 .get_bypass = regulator_get_bypass_regmap,
145 .set_bypass = regulator_set_bypass_regmap,
Mark Brown1910efa2012-06-23 13:07:57 +0100146};
147
148static const struct regulator_desc arizona_ldo1 = {
149 .name = "LDO1",
150 .supply_name = "LDOVDD",
151 .type = REGULATOR_VOLTAGE,
152 .ops = &arizona_ldo1_ops,
153
154 .vsel_reg = ARIZONA_LDO1_CONTROL_1,
155 .vsel_mask = ARIZONA_LDO1_VSEL_MASK,
156 .min_uV = 900000,
Charles Keepaxa35ff282014-03-18 10:49:17 +0000157 .uV_step = 25000,
158 .n_voltages = 13,
Mark Brown86a14502012-11-27 17:02:29 +0000159 .enable_time = 500,
Mark Brown1910efa2012-06-23 13:07:57 +0100160
161 .owner = THIS_MODULE,
162};
163
Mark Brown55a18ae2012-11-27 17:51:46 +0000164static const struct regulator_init_data arizona_ldo1_dvfs = {
165 .constraints = {
166 .min_uV = 1200000,
167 .max_uV = 1800000,
168 .valid_ops_mask = REGULATOR_CHANGE_STATUS |
169 REGULATOR_CHANGE_VOLTAGE,
170 },
171 .num_consumer_supplies = 1,
172};
173
Mark Brown1910efa2012-06-23 13:07:57 +0100174static const struct regulator_init_data arizona_ldo1_default = {
Mark Browna9905b12012-06-27 14:32:06 +0100175 .constraints = {
176 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
177 },
Mark Brown1910efa2012-06-23 13:07:57 +0100178 .num_consumer_supplies = 1,
179};
180
Bill Pembertona5023572012-11-19 13:22:22 -0500181static int arizona_ldo1_probe(struct platform_device *pdev)
Mark Brown1910efa2012-06-23 13:07:57 +0100182{
183 struct arizona *arizona = dev_get_drvdata(pdev->dev.parent);
Mark Brown73ee2942012-11-27 18:48:33 +0000184 const struct regulator_desc *desc;
Mark Brown1910efa2012-06-23 13:07:57 +0100185 struct regulator_config config = { };
186 struct arizona_ldo1 *ldo1;
187 int ret;
188
189 ldo1 = devm_kzalloc(&pdev->dev, sizeof(*ldo1), GFP_KERNEL);
Sachin Kamatf4a6c5b2014-02-18 16:11:09 +0530190 if (!ldo1)
Mark Brown1910efa2012-06-23 13:07:57 +0100191 return -ENOMEM;
Mark Brown1910efa2012-06-23 13:07:57 +0100192
193 ldo1->arizona = arizona;
194
195 /*
196 * Since the chip usually supplies itself we provide some
197 * default init_data for it. This will be overridden with
198 * platform data if provided.
199 */
Mark Brown55a18ae2012-11-27 17:51:46 +0000200 switch (arizona->type) {
201 case WM5102:
Charles Keepaxa35ff282014-03-18 10:49:17 +0000202 case WM8997:
Mark Brown73ee2942012-11-27 18:48:33 +0000203 desc = &arizona_ldo1_hc;
Mark Brown55a18ae2012-11-27 17:51:46 +0000204 ldo1->init_data = arizona_ldo1_dvfs;
205 break;
206 default:
Mark Brown73ee2942012-11-27 18:48:33 +0000207 desc = &arizona_ldo1;
Mark Brown55a18ae2012-11-27 17:51:46 +0000208 ldo1->init_data = arizona_ldo1_default;
209 break;
210 }
211
Mark Brown1910efa2012-06-23 13:07:57 +0100212 ldo1->init_data.consumer_supplies = &ldo1->supply;
213 ldo1->supply.supply = "DCVDD";
214 ldo1->supply.dev_name = dev_name(arizona->dev);
215
216 config.dev = arizona->dev;
217 config.driver_data = ldo1;
218 config.regmap = arizona->regmap;
Mark Browna9905b12012-06-27 14:32:06 +0100219 config.ena_gpio = arizona->pdata.ldoena;
Mark Brown1910efa2012-06-23 13:07:57 +0100220
221 if (arizona->pdata.ldo1)
222 config.init_data = arizona->pdata.ldo1;
223 else
224 config.init_data = &ldo1->init_data;
225
Mark Brown14ffa882013-08-31 11:56:47 +0100226 ldo1->regulator = devm_regulator_register(&pdev->dev, desc, &config);
Mark Brown1910efa2012-06-23 13:07:57 +0100227 if (IS_ERR(ldo1->regulator)) {
228 ret = PTR_ERR(ldo1->regulator);
229 dev_err(arizona->dev, "Failed to register LDO1 supply: %d\n",
230 ret);
231 return ret;
232 }
233
234 platform_set_drvdata(pdev, ldo1);
235
236 return 0;
237}
238
Mark Brown1910efa2012-06-23 13:07:57 +0100239static struct platform_driver arizona_ldo1_driver = {
240 .probe = arizona_ldo1_probe,
Mark Brown1910efa2012-06-23 13:07:57 +0100241 .driver = {
242 .name = "arizona-ldo1",
243 .owner = THIS_MODULE,
244 },
245};
246
247module_platform_driver(arizona_ldo1_driver);
248
249/* Module information */
250MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
251MODULE_DESCRIPTION("Arizona LDO1 driver");
252MODULE_LICENSE("GPL");
253MODULE_ALIAS("platform:arizona-ldo1");