Merge branch 'work.adfs' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
[linux-2.6-microblaze.git] / drivers / regulator / arizona-ldo1.c
1 // SPDX-License-Identifier: GPL-2.0+
2 //
3 // arizona-ldo1.c  --  LDO1 supply for Arizona devices
4 //
5 // Copyright 2012 Wolfson Microelectronics PLC.
6 //
7 // Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
8
9 #include <linux/module.h>
10 #include <linux/moduleparam.h>
11 #include <linux/init.h>
12 #include <linux/bitops.h>
13 #include <linux/err.h>
14 #include <linux/of.h>
15 #include <linux/gpio/consumer.h>
16 #include <linux/platform_device.h>
17 #include <linux/regulator/driver.h>
18 #include <linux/regulator/machine.h>
19 #include <linux/regulator/of_regulator.h>
20 #include <linux/slab.h>
21
22 #include <linux/regulator/arizona-ldo1.h>
23
24 #include <linux/mfd/arizona/core.h>
25 #include <linux/mfd/arizona/pdata.h>
26 #include <linux/mfd/arizona/registers.h>
27
28 #include <linux/mfd/madera/core.h>
29 #include <linux/mfd/madera/pdata.h>
30 #include <linux/mfd/madera/registers.h>
31
32 struct arizona_ldo1 {
33         struct regulator_dev *regulator;
34         struct regmap *regmap;
35
36         struct regulator_consumer_supply supply;
37         struct regulator_init_data init_data;
38
39         struct gpio_desc *ena_gpiod;
40 };
41
42 static int arizona_ldo1_hc_set_voltage_sel(struct regulator_dev *rdev,
43                                            unsigned sel)
44 {
45         struct regmap *regmap = rdev_get_regmap(rdev);
46         unsigned int val;
47         int ret;
48
49         if (sel == rdev->desc->n_voltages - 1)
50                 val = ARIZONA_LDO1_HI_PWR;
51         else
52                 val = 0;
53
54         ret = regmap_update_bits(regmap, ARIZONA_LDO1_CONTROL_2,
55                                  ARIZONA_LDO1_HI_PWR, val);
56         if (ret != 0)
57                 return ret;
58
59         if (val)
60                 return 0;
61
62         return regulator_set_voltage_sel_regmap(rdev, sel);
63 }
64
65 static int arizona_ldo1_hc_get_voltage_sel(struct regulator_dev *rdev)
66 {
67         struct regmap *regmap = rdev_get_regmap(rdev);
68         unsigned int val;
69         int ret;
70
71         ret = regmap_read(regmap, ARIZONA_LDO1_CONTROL_2, &val);
72         if (ret != 0)
73                 return ret;
74
75         if (val & ARIZONA_LDO1_HI_PWR)
76                 return rdev->desc->n_voltages - 1;
77
78         return regulator_get_voltage_sel_regmap(rdev);
79 }
80
81 static const struct regulator_ops arizona_ldo1_hc_ops = {
82         .list_voltage = regulator_list_voltage_linear_range,
83         .map_voltage = regulator_map_voltage_linear_range,
84         .get_voltage_sel = arizona_ldo1_hc_get_voltage_sel,
85         .set_voltage_sel = arizona_ldo1_hc_set_voltage_sel,
86         .get_bypass = regulator_get_bypass_regmap,
87         .set_bypass = regulator_set_bypass_regmap,
88 };
89
90 static const struct regulator_linear_range arizona_ldo1_hc_ranges[] = {
91         REGULATOR_LINEAR_RANGE(900000, 0, 0x6, 50000),
92         REGULATOR_LINEAR_RANGE(1800000, 0x7, 0x7, 0),
93 };
94
95 static const struct regulator_desc arizona_ldo1_hc = {
96         .name = "LDO1",
97         .supply_name = "LDOVDD",
98         .type = REGULATOR_VOLTAGE,
99         .ops = &arizona_ldo1_hc_ops,
100
101         .vsel_reg = ARIZONA_LDO1_CONTROL_1,
102         .vsel_mask = ARIZONA_LDO1_VSEL_MASK,
103         .bypass_reg = ARIZONA_LDO1_CONTROL_1,
104         .bypass_mask = ARIZONA_LDO1_BYPASS,
105         .linear_ranges = arizona_ldo1_hc_ranges,
106         .n_linear_ranges = ARRAY_SIZE(arizona_ldo1_hc_ranges),
107         .n_voltages = 8,
108         .enable_time = 1500,
109         .ramp_delay = 24000,
110
111         .owner = THIS_MODULE,
112 };
113
114 static const struct regulator_ops arizona_ldo1_ops = {
115         .list_voltage = regulator_list_voltage_linear,
116         .map_voltage = regulator_map_voltage_linear,
117         .get_voltage_sel = regulator_get_voltage_sel_regmap,
118         .set_voltage_sel = regulator_set_voltage_sel_regmap,
119 };
120
121 static const struct regulator_desc arizona_ldo1 = {
122         .name = "LDO1",
123         .supply_name = "LDOVDD",
124         .type = REGULATOR_VOLTAGE,
125         .ops = &arizona_ldo1_ops,
126
127         .vsel_reg = ARIZONA_LDO1_CONTROL_1,
128         .vsel_mask = ARIZONA_LDO1_VSEL_MASK,
129         .min_uV = 900000,
130         .uV_step = 25000,
131         .n_voltages = 13,
132         .enable_time = 500,
133         .ramp_delay = 24000,
134
135         .owner = THIS_MODULE,
136 };
137
138 static const struct regulator_init_data arizona_ldo1_dvfs = {
139         .constraints = {
140                 .min_uV = 1200000,
141                 .max_uV = 1800000,
142                 .valid_ops_mask = REGULATOR_CHANGE_STATUS |
143                                   REGULATOR_CHANGE_VOLTAGE,
144         },
145         .num_consumer_supplies = 1,
146 };
147
148 static const struct regulator_init_data arizona_ldo1_default = {
149         .constraints = {
150                 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
151         },
152         .num_consumer_supplies = 1,
153 };
154
155 static const struct regulator_init_data arizona_ldo1_wm5110 = {
156         .constraints = {
157                 .min_uV = 1175000,
158                 .max_uV = 1200000,
159                 .valid_ops_mask = REGULATOR_CHANGE_STATUS |
160                                   REGULATOR_CHANGE_VOLTAGE,
161         },
162         .num_consumer_supplies = 1,
163 };
164
165 static const struct regulator_desc madera_ldo1 = {
166         .name = "LDO1",
167         .supply_name = "LDOVDD",
168         .type = REGULATOR_VOLTAGE,
169         .ops = &arizona_ldo1_ops,
170
171         .vsel_reg = MADERA_LDO1_CONTROL_1,
172         .vsel_mask = MADERA_LDO1_VSEL_MASK,
173         .min_uV = 900000,
174         .uV_step = 25000,
175         .n_voltages = 13,
176         .enable_time = 3000,
177
178         .owner = THIS_MODULE,
179 };
180
181 static const struct regulator_init_data madera_ldo1_default = {
182         .constraints = {
183                 .min_uV = 1200000,
184                 .max_uV = 1200000,
185                 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
186         },
187         .num_consumer_supplies = 1,
188 };
189
190 static int arizona_ldo1_of_get_pdata(struct arizona_ldo1_pdata *pdata,
191                                      struct regulator_config *config,
192                                      const struct regulator_desc *desc,
193                                      bool *external_dcvdd)
194 {
195         struct arizona_ldo1 *ldo1 = config->driver_data;
196         struct device_node *np = config->dev->of_node;
197         struct device_node *init_node, *dcvdd_node;
198         struct regulator_init_data *init_data;
199
200         init_node = of_get_child_by_name(np, "ldo1");
201         dcvdd_node = of_parse_phandle(np, "DCVDD-supply", 0);
202
203         if (init_node) {
204                 config->of_node = init_node;
205
206                 init_data = of_get_regulator_init_data(config->dev, init_node,
207                                                        desc);
208                 if (init_data) {
209                         init_data->consumer_supplies = &ldo1->supply;
210                         init_data->num_consumer_supplies = 1;
211
212                         if (dcvdd_node && dcvdd_node != init_node)
213                                 *external_dcvdd = true;
214
215                         pdata->init_data = init_data;
216                 }
217         } else if (dcvdd_node) {
218                 *external_dcvdd = true;
219         }
220
221         of_node_put(dcvdd_node);
222
223         return 0;
224 }
225
226 static int arizona_ldo1_common_init(struct platform_device *pdev,
227                                     struct arizona_ldo1 *ldo1,
228                                     const struct regulator_desc *desc,
229                                     struct arizona_ldo1_pdata *pdata,
230                                     bool *external_dcvdd)
231 {
232         struct device *parent_dev = pdev->dev.parent;
233         struct regulator_config config = { };
234         int ret;
235
236         *external_dcvdd = false;
237
238         ldo1->supply.supply = "DCVDD";
239         ldo1->init_data.consumer_supplies = &ldo1->supply;
240         ldo1->supply.dev_name = dev_name(parent_dev);
241
242         config.dev = parent_dev;
243         config.driver_data = ldo1;
244         config.regmap = ldo1->regmap;
245
246         if (IS_ENABLED(CONFIG_OF)) {
247                 if (!dev_get_platdata(parent_dev)) {
248                         ret = arizona_ldo1_of_get_pdata(pdata,
249                                                         &config, desc,
250                                                         external_dcvdd);
251                         if (ret < 0)
252                                 return ret;
253                 }
254         }
255
256         /* We assume that high output = regulator off
257          * Don't use devm, since we need to get against the parent device
258          * so clean up would happen at the wrong time
259          */
260         config.ena_gpiod = gpiod_get_optional(parent_dev, "wlf,ldoena",
261                                 GPIOD_OUT_LOW | GPIOD_FLAGS_BIT_NONEXCLUSIVE);
262         if (IS_ERR(config.ena_gpiod))
263                 return PTR_ERR(config.ena_gpiod);
264
265         ldo1->ena_gpiod = config.ena_gpiod;
266
267         if (pdata->init_data)
268                 config.init_data = pdata->init_data;
269         else
270                 config.init_data = &ldo1->init_data;
271
272         /*
273          * LDO1 can only be used to supply DCVDD so if it has no
274          * consumers then DCVDD is supplied externally.
275          */
276         if (config.init_data->num_consumer_supplies == 0)
277                 *external_dcvdd = true;
278
279         ldo1->regulator = devm_regulator_register(&pdev->dev, desc, &config);
280
281         of_node_put(config.of_node);
282
283         if (IS_ERR(ldo1->regulator)) {
284                 ret = PTR_ERR(ldo1->regulator);
285                 dev_err(&pdev->dev, "Failed to register LDO1 supply: %d\n",
286                         ret);
287                 return ret;
288         }
289
290         platform_set_drvdata(pdev, ldo1);
291
292         return 0;
293 }
294
295 static int arizona_ldo1_probe(struct platform_device *pdev)
296 {
297         struct arizona *arizona = dev_get_drvdata(pdev->dev.parent);
298         struct arizona_ldo1 *ldo1;
299         const struct regulator_desc *desc;
300         bool external_dcvdd;
301         int ret;
302
303         ldo1 = devm_kzalloc(&pdev->dev, sizeof(*ldo1), GFP_KERNEL);
304         if (!ldo1)
305                 return -ENOMEM;
306
307         ldo1->regmap = arizona->regmap;
308
309         /*
310          * Since the chip usually supplies itself we provide some
311          * default init_data for it.  This will be overridden with
312          * platform data if provided.
313          */
314         switch (arizona->type) {
315         case WM5102:
316         case WM8997:
317         case WM8998:
318         case WM1814:
319                 desc = &arizona_ldo1_hc;
320                 ldo1->init_data = arizona_ldo1_dvfs;
321                 break;
322         case WM5110:
323         case WM8280:
324                 desc = &arizona_ldo1;
325                 ldo1->init_data = arizona_ldo1_wm5110;
326                 break;
327         default:
328                 desc = &arizona_ldo1;
329                 ldo1->init_data = arizona_ldo1_default;
330                 break;
331         }
332
333         ret = arizona_ldo1_common_init(pdev, ldo1, desc,
334                                        &arizona->pdata.ldo1,
335                                        &external_dcvdd);
336         if (ret == 0)
337                 arizona->external_dcvdd = external_dcvdd;
338
339         return ret;
340 }
341
342 static int arizona_ldo1_remove(struct platform_device *pdev)
343 {
344         struct arizona_ldo1 *ldo1 = platform_get_drvdata(pdev);
345
346         if (ldo1->ena_gpiod)
347                 gpiod_put(ldo1->ena_gpiod);
348
349         return 0;
350 }
351
352 static int madera_ldo1_probe(struct platform_device *pdev)
353 {
354         struct madera *madera = dev_get_drvdata(pdev->dev.parent);
355         struct arizona_ldo1 *ldo1;
356         bool external_dcvdd;
357         int ret;
358
359         ldo1 = devm_kzalloc(&pdev->dev, sizeof(*ldo1), GFP_KERNEL);
360         if (!ldo1)
361                 return -ENOMEM;
362
363         ldo1->regmap = madera->regmap;
364
365         ldo1->init_data = madera_ldo1_default;
366
367         ret = arizona_ldo1_common_init(pdev, ldo1, &madera_ldo1,
368                                        &madera->pdata.ldo1,
369                                        &external_dcvdd);
370         if (ret)
371                 return ret;
372
373         madera->internal_dcvdd = !external_dcvdd;
374
375         return 0;
376 }
377
378 static struct platform_driver arizona_ldo1_driver = {
379         .probe = arizona_ldo1_probe,
380         .remove = arizona_ldo1_remove,
381         .driver         = {
382                 .name   = "arizona-ldo1",
383         },
384 };
385
386 static struct platform_driver madera_ldo1_driver = {
387         .probe = madera_ldo1_probe,
388         .remove = arizona_ldo1_remove,
389         .driver         = {
390                 .name   = "madera-ldo1",
391         },
392 };
393
394 static struct platform_driver * const madera_ldo1_drivers[] = {
395         &arizona_ldo1_driver,
396         &madera_ldo1_driver,
397 };
398
399 static int __init arizona_ldo1_init(void)
400 {
401         return platform_register_drivers(madera_ldo1_drivers,
402                                          ARRAY_SIZE(madera_ldo1_drivers));
403 }
404 module_init(arizona_ldo1_init);
405
406 static void __exit madera_ldo1_exit(void)
407 {
408         platform_unregister_drivers(madera_ldo1_drivers,
409                                     ARRAY_SIZE(madera_ldo1_drivers));
410 }
411 module_exit(madera_ldo1_exit);
412
413 /* Module information */
414 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
415 MODULE_DESCRIPTION("Arizona LDO1 driver");
416 MODULE_LICENSE("GPL");
417 MODULE_ALIAS("platform:arizona-ldo1");
418 MODULE_ALIAS("platform:madera-ldo1");