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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/of.h>
20#include <linux/of_gpio.h>
21#include <linux/platform_device.h>
22#include <linux/regulator/driver.h>
23#include <linux/regulator/machine.h>
24#include <linux/regulator/of_regulator.h>
25#include <linux/gpio.h>
26#include <linux/slab.h>
27
28#include <linux/regulator/arizona-ldo1.h>
29
30#include <linux/mfd/arizona/core.h>
31#include <linux/mfd/arizona/pdata.h>
32#include <linux/mfd/arizona/registers.h>
33
34struct arizona_ldo1 {
35 struct regulator_dev *regulator;
36 struct regmap *regmap;
37
38 struct regulator_consumer_supply supply;
39 struct regulator_init_data init_data;
40};
41
42static int arizona_ldo1_hc_list_voltage(struct regulator_dev *rdev,
43 unsigned int selector)
44{
45 if (selector >= rdev->desc->n_voltages)
46 return -EINVAL;
47
48 if (selector == rdev->desc->n_voltages - 1)
49 return 1800000;
50 else
51 return rdev->desc->min_uV + (rdev->desc->uV_step * selector);
52}
53
54static int arizona_ldo1_hc_map_voltage(struct regulator_dev *rdev,
55 int min_uV, int max_uV)
56{
57 int sel;
58
59 sel = DIV_ROUND_UP(min_uV - rdev->desc->min_uV, rdev->desc->uV_step);
60 if (sel >= rdev->desc->n_voltages)
61 sel = rdev->desc->n_voltages - 1;
62
63 return sel;
64}
65
66static int arizona_ldo1_hc_set_voltage_sel(struct regulator_dev *rdev,
67 unsigned sel)
68{
69 struct arizona_ldo1 *ldo = rdev_get_drvdata(rdev);
70 struct regmap *regmap = ldo->regmap;
71 unsigned int val;
72 int ret;
73
74 if (sel == rdev->desc->n_voltages - 1)
75 val = ARIZONA_LDO1_HI_PWR;
76 else
77 val = 0;
78
79 ret = regmap_update_bits(regmap, ARIZONA_LDO1_CONTROL_2,
80 ARIZONA_LDO1_HI_PWR, 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->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 const 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 .ramp_delay = 24000,
136
137 .owner = THIS_MODULE,
138};
139
140static const struct regulator_ops arizona_ldo1_ops = {
141 .list_voltage = regulator_list_voltage_linear,
142 .map_voltage = regulator_map_voltage_linear,
143 .get_voltage_sel = regulator_get_voltage_sel_regmap,
144 .set_voltage_sel = regulator_set_voltage_sel_regmap,
145};
146
147static const struct regulator_desc arizona_ldo1 = {
148 .name = "LDO1",
149 .supply_name = "LDOVDD",
150 .type = REGULATOR_VOLTAGE,
151 .ops = &arizona_ldo1_ops,
152
153 .vsel_reg = ARIZONA_LDO1_CONTROL_1,
154 .vsel_mask = ARIZONA_LDO1_VSEL_MASK,
155 .min_uV = 900000,
156 .uV_step = 25000,
157 .n_voltages = 13,
158 .enable_time = 500,
159 .ramp_delay = 24000,
160
161 .owner = THIS_MODULE,
162};
163
164static 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
174static const struct regulator_init_data arizona_ldo1_default = {
175 .constraints = {
176 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
177 },
178 .num_consumer_supplies = 1,
179};
180
181static const struct regulator_init_data arizona_ldo1_wm5110 = {
182 .constraints = {
183 .min_uV = 1175000,
184 .max_uV = 1200000,
185 .valid_ops_mask = REGULATOR_CHANGE_STATUS |
186 REGULATOR_CHANGE_VOLTAGE,
187 },
188 .num_consumer_supplies = 1,
189};
190
191static int arizona_ldo1_of_get_pdata(struct arizona_ldo1_pdata *pdata,
192 struct regulator_config *config,
193 const struct regulator_desc *desc,
194 bool *external_dcvdd)
195{
196 struct arizona_ldo1 *ldo1 = config->driver_data;
197 struct device_node *np = config->dev->of_node;
198 struct device_node *init_node, *dcvdd_node;
199 struct regulator_init_data *init_data;
200
201 pdata->ldoena = of_get_named_gpio(np, "wlf,ldoena", 0);
202 if (pdata->ldoena < 0) {
203 dev_warn(config->dev,
204 "LDOENA GPIO property missing/malformed: %d\n",
205 pdata->ldoena);
206 pdata->ldoena = 0;
207 } else {
208 config->ena_gpio_initialized = true;
209 }
210
211 init_node = of_get_child_by_name(np, "ldo1");
212 dcvdd_node = of_parse_phandle(np, "DCVDD-supply", 0);
213
214 if (init_node) {
215 config->of_node = init_node;
216
217 init_data = of_get_regulator_init_data(config->dev, init_node,
218 desc);
219 if (init_data) {
220 init_data->consumer_supplies = &ldo1->supply;
221 init_data->num_consumer_supplies = 1;
222
223 if (dcvdd_node && dcvdd_node != init_node)
224 *external_dcvdd = true;
225
226 pdata->init_data = init_data;
227 }
228 } else if (dcvdd_node) {
229 *external_dcvdd = true;
230 }
231
232 of_node_put(dcvdd_node);
233
234 return 0;
235}
236
237static int arizona_ldo1_common_init(struct platform_device *pdev,
238 struct arizona_ldo1 *ldo1,
239 const struct regulator_desc *desc,
240 struct arizona_ldo1_pdata *pdata,
241 bool *external_dcvdd)
242{
243 struct device *parent_dev = pdev->dev.parent;
244 struct regulator_config config = { };
245 int ret;
246
247 *external_dcvdd = false;
248
249 ldo1->supply.supply = "DCVDD";
250 ldo1->init_data.consumer_supplies = &ldo1->supply;
251 ldo1->supply.dev_name = dev_name(parent_dev);
252
253 config.dev = parent_dev;
254 config.driver_data = ldo1;
255 config.regmap = ldo1->regmap;
256
257 if (IS_ENABLED(CONFIG_OF)) {
258 if (!dev_get_platdata(parent_dev)) {
259 ret = arizona_ldo1_of_get_pdata(pdata,
260 &config, desc,
261 external_dcvdd);
262 if (ret < 0)
263 return ret;
264 }
265 }
266
267 config.ena_gpio = pdata->ldoena;
268
269 if (pdata->init_data)
270 config.init_data = pdata->init_data;
271 else
272 config.init_data = &ldo1->init_data;
273
274
275
276
277
278 if (config.init_data->num_consumer_supplies == 0)
279 *external_dcvdd = true;
280
281 ldo1->regulator = devm_regulator_register(&pdev->dev, desc, &config);
282
283 of_node_put(config.of_node);
284
285 if (IS_ERR(ldo1->regulator)) {
286 ret = PTR_ERR(ldo1->regulator);
287 dev_err(&pdev->dev, "Failed to register LDO1 supply: %d\n",
288 ret);
289 return ret;
290 }
291
292 platform_set_drvdata(pdev, ldo1);
293
294 return 0;
295}
296
297static int arizona_ldo1_probe(struct platform_device *pdev)
298{
299 struct arizona *arizona = dev_get_drvdata(pdev->dev.parent);
300 struct arizona_ldo1 *ldo1;
301 const struct regulator_desc *desc;
302 bool external_dcvdd;
303 int ret;
304
305 ldo1 = devm_kzalloc(&pdev->dev, sizeof(*ldo1), GFP_KERNEL);
306 if (!ldo1)
307 return -ENOMEM;
308
309 ldo1->regmap = arizona->regmap;
310
311
312
313
314
315
316 switch (arizona->type) {
317 case WM5102:
318 case WM8997:
319 case WM8998:
320 case WM1814:
321 desc = &arizona_ldo1_hc;
322 ldo1->init_data = arizona_ldo1_dvfs;
323 break;
324 case WM5110:
325 case WM8280:
326 desc = &arizona_ldo1;
327 ldo1->init_data = arizona_ldo1_wm5110;
328 break;
329 default:
330 desc = &arizona_ldo1;
331 ldo1->init_data = arizona_ldo1_default;
332 break;
333 }
334
335 ret = arizona_ldo1_common_init(pdev, ldo1, desc,
336 &arizona->pdata.ldo1,
337 &external_dcvdd);
338 if (ret == 0)
339 arizona->external_dcvdd = external_dcvdd;
340
341 return ret;
342}
343
344static struct platform_driver arizona_ldo1_driver = {
345 .probe = arizona_ldo1_probe,
346 .driver = {
347 .name = "arizona-ldo1",
348 },
349};
350
351module_platform_driver(arizona_ldo1_driver);
352
353
354MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
355MODULE_DESCRIPTION("Arizona LDO1 driver");
356MODULE_LICENSE("GPL");
357MODULE_ALIAS("platform:arizona-ldo1");
358
