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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
37static 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,
134 .enable_time = 1500,
135
136 .owner = THIS_MODULE,
137};
138
139static 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,
144 .get_bypass = regulator_get_bypass_regmap,
145 .set_bypass = regulator_set_bypass_regmap,
146};
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 .bypass_reg = ARIZONA_LDO1_CONTROL_1,
157 .bypass_mask = ARIZONA_LDO1_BYPASS,
158 .min_uV = 900000,
159 .uV_step = 50000,
160 .n_voltages = 7,
161 .enable_time = 500,
162
163 .owner = THIS_MODULE,
164};
165
166static const struct regulator_init_data arizona_ldo1_dvfs = {
167 .constraints = {
168 .min_uV = 1200000,
169 .max_uV = 1800000,
170 .valid_ops_mask = REGULATOR_CHANGE_STATUS |
171 REGULATOR_CHANGE_VOLTAGE,
172 },
173 .num_consumer_supplies = 1,
174};
175
176static const struct regulator_init_data arizona_ldo1_default = {
177 .constraints = {
178 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
179 },
180 .num_consumer_supplies = 1,
181};
182
183static int arizona_ldo1_probe(struct platform_device *pdev)
184{
185 struct arizona *arizona = dev_get_drvdata(pdev->dev.parent);
186 const struct regulator_desc *desc;
187 struct regulator_config config = { };
188 struct arizona_ldo1 *ldo1;
189 int ret;
190
191 ldo1 = devm_kzalloc(&pdev->dev, sizeof(*ldo1), GFP_KERNEL);
192 if (ldo1 == NULL) {
193 dev_err(&pdev->dev, "Unable to allocate private data\n");
194 return -ENOMEM;
195 }
196
197 ldo1->arizona = arizona;
198
199
200
201
202
203
204 switch (arizona->type) {
205 case WM5102:
206 desc = &arizona_ldo1_hc;
207 ldo1->init_data = arizona_ldo1_dvfs;
208 break;
209 default:
210 desc = &arizona_ldo1;
211 ldo1->init_data = arizona_ldo1_default;
212 break;
213 }
214
215 ldo1->init_data.consumer_supplies = &ldo1->supply;
216 ldo1->supply.supply = "DCVDD";
217 ldo1->supply.dev_name = dev_name(arizona->dev);
218
219 config.dev = arizona->dev;
220 config.driver_data = ldo1;
221 config.regmap = arizona->regmap;
222 config.ena_gpio = arizona->pdata.ldoena;
223
224 if (arizona->pdata.ldo1)
225 config.init_data = arizona->pdata.ldo1;
226 else
227 config.init_data = &ldo1->init_data;
228
229 ldo1->regulator = regulator_register(desc, &config);
230 if (IS_ERR(ldo1->regulator)) {
231 ret = PTR_ERR(ldo1->regulator);
232 dev_err(arizona->dev, "Failed to register LDO1 supply: %d\n",
233 ret);
234 return ret;
235 }
236
237 platform_set_drvdata(pdev, ldo1);
238
239 return 0;
240}
241
242static int arizona_ldo1_remove(struct platform_device *pdev)
243{
244 struct arizona_ldo1 *ldo1 = platform_get_drvdata(pdev);
245
246 regulator_unregister(ldo1->regulator);
247
248 return 0;
249}
250
251static struct platform_driver arizona_ldo1_driver = {
252 .probe = arizona_ldo1_probe,
253 .remove = arizona_ldo1_remove,
254 .driver = {
255 .name = "arizona-ldo1",
256 .owner = THIS_MODULE,
257 },
258};
259
260module_platform_driver(arizona_ldo1_driver);
261
262
263MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
264MODULE_DESCRIPTION("Arizona LDO1 driver");
265MODULE_LICENSE("GPL");
266MODULE_ALIAS("platform:arizona-ldo1");
267
