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Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/evalenti/linux...
[linux/fpc-iii.git] / drivers / regulator / axp20x-regulator.c
blob40cd894e4df5e3d11f26442692dd9c0076d932af
1 /*
2 * AXP20x regulators driver.
3 *
4 * Copyright (C) 2013 Carlo Caione <carlo@caione.org>
5 *
6 * This file is subject to the terms and conditions of the GNU General
7 * Public License. See the file "COPYING" in the main directory of this
8 * archive for more details.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 */
15
16 #include <linux/err.h>
17 #include <linux/init.h>
18 #include <linux/module.h>
19 #include <linux/of.h>
20 #include <linux/of_device.h>
21 #include <linux/platform_device.h>
22 #include <linux/regmap.h>
23 #include <linux/mfd/axp20x.h>
24 #include <linux/regulator/driver.h>
25 #include <linux/regulator/of_regulator.h>
26
27 #define AXP20X_IO_ENABLED 0x03
28 #define AXP20X_IO_DISABLED 0x07
29
30 #define AXP22X_IO_ENABLED 0x03
31 #define AXP22X_IO_DISABLED 0x04
32
33 #define AXP20X_WORKMODE_DCDC2_MASK BIT(2)
34 #define AXP20X_WORKMODE_DCDC3_MASK BIT(1)
35 #define AXP22X_WORKMODE_DCDCX_MASK(x) BIT(x)
36
37 #define AXP20X_FREQ_DCDC_MASK 0x0f
38
39 #define AXP_DESC_IO(_family, _id, _match, _supply, _min, _max, _step, _vreg, \
40 _vmask, _ereg, _emask, _enable_val, _disable_val) \
41 [_family##_##_id] = { \
42 .name = (_match), \
43 .supply_name = (_supply), \
44 .of_match = of_match_ptr(_match), \
45 .regulators_node = of_match_ptr("regulators"), \
46 .type = REGULATOR_VOLTAGE, \
47 .id = _family##_##_id, \
48 .n_voltages = (((_max) - (_min)) / (_step) + 1), \
49 .owner = THIS_MODULE, \
50 .min_uV = (_min) * 1000, \
51 .uV_step = (_step) * 1000, \
52 .vsel_reg = (_vreg), \
53 .vsel_mask = (_vmask), \
54 .enable_reg = (_ereg), \
55 .enable_mask = (_emask), \
56 .enable_val = (_enable_val), \
57 .disable_val = (_disable_val), \
58 .ops = &axp20x_ops, \
59 }
60
61 #define AXP_DESC(_family, _id, _match, _supply, _min, _max, _step, _vreg, \
62 _vmask, _ereg, _emask) \
63 [_family##_##_id] = { \
64 .name = (_match), \
65 .supply_name = (_supply), \
66 .of_match = of_match_ptr(_match), \
67 .regulators_node = of_match_ptr("regulators"), \
68 .type = REGULATOR_VOLTAGE, \
69 .id = _family##_##_id, \
70 .n_voltages = (((_max) - (_min)) / (_step) + 1), \
71 .owner = THIS_MODULE, \
72 .min_uV = (_min) * 1000, \
73 .uV_step = (_step) * 1000, \
74 .vsel_reg = (_vreg), \
75 .vsel_mask = (_vmask), \
76 .enable_reg = (_ereg), \
77 .enable_mask = (_emask), \
78 .ops = &axp20x_ops, \
79 }
80
81 #define AXP_DESC_SW(_family, _id, _match, _supply, _ereg, _emask) \
82 [_family##_##_id] = { \
83 .name = (_match), \
84 .supply_name = (_supply), \
85 .of_match = of_match_ptr(_match), \
86 .regulators_node = of_match_ptr("regulators"), \
87 .type = REGULATOR_VOLTAGE, \
88 .id = _family##_##_id, \
89 .owner = THIS_MODULE, \
90 .enable_reg = (_ereg), \
91 .enable_mask = (_emask), \
92 .ops = &axp20x_ops_sw, \
93 }
94
95 #define AXP_DESC_FIXED(_family, _id, _match, _supply, _volt) \
96 [_family##_##_id] = { \
97 .name = (_match), \
98 .supply_name = (_supply), \
99 .of_match = of_match_ptr(_match), \
100 .regulators_node = of_match_ptr("regulators"), \
101 .type = REGULATOR_VOLTAGE, \
102 .id = _family##_##_id, \
103 .n_voltages = 1, \
104 .owner = THIS_MODULE, \
105 .min_uV = (_volt) * 1000, \
106 .ops = &axp20x_ops_fixed \
107 }
108
109 #define AXP_DESC_RANGES(_family, _id, _match, _supply, _ranges, _n_voltages, \
110 _vreg, _vmask, _ereg, _emask) \
111 [_family##_##_id] = { \
112 .name = (_match), \
113 .supply_name = (_supply), \
114 .of_match = of_match_ptr(_match), \
115 .regulators_node = of_match_ptr("regulators"), \
116 .type = REGULATOR_VOLTAGE, \
117 .id = _family##_##_id, \
118 .n_voltages = (_n_voltages), \
119 .owner = THIS_MODULE, \
120 .vsel_reg = (_vreg), \
121 .vsel_mask = (_vmask), \
122 .enable_reg = (_ereg), \
123 .enable_mask = (_emask), \
124 .linear_ranges = (_ranges), \
125 .n_linear_ranges = ARRAY_SIZE(_ranges), \
126 .ops = &axp20x_ops_range, \
127 }
128
129 static struct regulator_ops axp20x_ops_fixed = {
130 .list_voltage = regulator_list_voltage_linear,
131 };
132
133 static struct regulator_ops axp20x_ops_range = {
134 .set_voltage_sel = regulator_set_voltage_sel_regmap,
135 .get_voltage_sel = regulator_get_voltage_sel_regmap,
136 .list_voltage = regulator_list_voltage_linear_range,
137 .enable = regulator_enable_regmap,
138 .disable = regulator_disable_regmap,
139 .is_enabled = regulator_is_enabled_regmap,
140 };
141
142 static struct regulator_ops axp20x_ops = {
143 .set_voltage_sel = regulator_set_voltage_sel_regmap,
144 .get_voltage_sel = regulator_get_voltage_sel_regmap,
145 .list_voltage = regulator_list_voltage_linear,
146 .enable = regulator_enable_regmap,
147 .disable = regulator_disable_regmap,
148 .is_enabled = regulator_is_enabled_regmap,
149 };
150
151 static struct regulator_ops axp20x_ops_sw = {
152 .enable = regulator_enable_regmap,
153 .disable = regulator_disable_regmap,
154 .is_enabled = regulator_is_enabled_regmap,
155 };
156
157 static const struct regulator_linear_range axp20x_ldo4_ranges[] = {
158 REGULATOR_LINEAR_RANGE(1250000, 0x0, 0x0, 0),
159 REGULATOR_LINEAR_RANGE(1300000, 0x1, 0x8, 100000),
160 REGULATOR_LINEAR_RANGE(2500000, 0x9, 0xf, 100000),
161 };
162
163 static const struct regulator_desc axp20x_regulators[] = {
164 AXP_DESC(AXP20X, DCDC2, "dcdc2", "vin2", 700, 2275, 25,
165 AXP20X_DCDC2_V_OUT, 0x3f, AXP20X_PWR_OUT_CTRL, 0x10),
166 AXP_DESC(AXP20X, DCDC3, "dcdc3", "vin3", 700, 3500, 25,
167 AXP20X_DCDC3_V_OUT, 0x7f, AXP20X_PWR_OUT_CTRL, 0x02),
168 AXP_DESC_FIXED(AXP20X, LDO1, "ldo1", "acin", 1300),
169 AXP_DESC(AXP20X, LDO2, "ldo2", "ldo24in", 1800, 3300, 100,
170 AXP20X_LDO24_V_OUT, 0xf0, AXP20X_PWR_OUT_CTRL, 0x04),
171 AXP_DESC(AXP20X, LDO3, "ldo3", "ldo3in", 700, 3500, 25,
172 AXP20X_LDO3_V_OUT, 0x7f, AXP20X_PWR_OUT_CTRL, 0x40),
173 AXP_DESC_RANGES(AXP20X, LDO4, "ldo4", "ldo24in", axp20x_ldo4_ranges,
174 16, AXP20X_LDO24_V_OUT, 0x0f, AXP20X_PWR_OUT_CTRL,
175 0x08),
176 AXP_DESC_IO(AXP20X, LDO5, "ldo5", "ldo5in", 1800, 3300, 100,
177 AXP20X_LDO5_V_OUT, 0xf0, AXP20X_GPIO0_CTRL, 0x07,
178 AXP20X_IO_ENABLED, AXP20X_IO_DISABLED),
179 };
180
181 static const struct regulator_desc axp22x_regulators[] = {
182 AXP_DESC(AXP22X, DCDC1, "dcdc1", "vin1", 1600, 3400, 100,
183 AXP22X_DCDC1_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL1, BIT(1)),
184 AXP_DESC(AXP22X, DCDC2, "dcdc2", "vin2", 600, 1540, 20,
185 AXP22X_DCDC2_V_OUT, 0x3f, AXP22X_PWR_OUT_CTRL1, BIT(2)),
186 AXP_DESC(AXP22X, DCDC3, "dcdc3", "vin3", 600, 1860, 20,
187 AXP22X_DCDC3_V_OUT, 0x3f, AXP22X_PWR_OUT_CTRL1, BIT(3)),
188 AXP_DESC(AXP22X, DCDC4, "dcdc4", "vin4", 600, 1540, 20,
189 AXP22X_DCDC4_V_OUT, 0x3f, AXP22X_PWR_OUT_CTRL1, BIT(4)),
190 AXP_DESC(AXP22X, DCDC5, "dcdc5", "vin5", 1000, 2550, 50,
191 AXP22X_DCDC5_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL1, BIT(5)),
192 /* secondary switchable output of DCDC1 */
193 AXP_DESC_SW(AXP22X, DC1SW, "dc1sw", NULL, AXP22X_PWR_OUT_CTRL2,
194 BIT(7)),
195 /* LDO regulator internally chained to DCDC5 */
196 AXP_DESC(AXP22X, DC5LDO, "dc5ldo", NULL, 700, 1400, 100,
197 AXP22X_DC5LDO_V_OUT, 0x7, AXP22X_PWR_OUT_CTRL1, BIT(0)),
198 AXP_DESC(AXP22X, ALDO1, "aldo1", "aldoin", 700, 3300, 100,
199 AXP22X_ALDO1_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL1, BIT(6)),
200 AXP_DESC(AXP22X, ALDO2, "aldo2", "aldoin", 700, 3300, 100,
201 AXP22X_ALDO2_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL1, BIT(7)),
202 AXP_DESC(AXP22X, ALDO3, "aldo3", "aldoin", 700, 3300, 100,
203 AXP22X_ALDO3_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL3, BIT(7)),
204 AXP_DESC(AXP22X, DLDO1, "dldo1", "dldoin", 700, 3300, 100,
205 AXP22X_DLDO1_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2, BIT(3)),
206 AXP_DESC(AXP22X, DLDO2, "dldo2", "dldoin", 700, 3300, 100,
207 AXP22X_DLDO2_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2, BIT(4)),
208 AXP_DESC(AXP22X, DLDO3, "dldo3", "dldoin", 700, 3300, 100,
209 AXP22X_DLDO3_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2, BIT(5)),
210 AXP_DESC(AXP22X, DLDO4, "dldo4", "dldoin", 700, 3300, 100,
211 AXP22X_DLDO4_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2, BIT(6)),
212 AXP_DESC(AXP22X, ELDO1, "eldo1", "eldoin", 700, 3300, 100,
213 AXP22X_ELDO1_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2, BIT(0)),
214 AXP_DESC(AXP22X, ELDO2, "eldo2", "eldoin", 700, 3300, 100,
215 AXP22X_ELDO2_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2, BIT(1)),
216 AXP_DESC(AXP22X, ELDO3, "eldo3", "eldoin", 700, 3300, 100,
217 AXP22X_ELDO3_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2, BIT(2)),
218 AXP_DESC_IO(AXP22X, LDO_IO0, "ldo_io0", "ips", 1800, 3300, 100,
219 AXP22X_LDO_IO0_V_OUT, 0x1f, AXP20X_GPIO0_CTRL, 0x07,
220 AXP22X_IO_ENABLED, AXP22X_IO_DISABLED),
221 AXP_DESC_IO(AXP22X, LDO_IO1, "ldo_io1", "ips", 1800, 3300, 100,
222 AXP22X_LDO_IO1_V_OUT, 0x1f, AXP20X_GPIO1_CTRL, 0x07,
223 AXP22X_IO_ENABLED, AXP22X_IO_DISABLED),
224 AXP_DESC_FIXED(AXP22X, RTC_LDO, "rtc_ldo", "ips", 3000),
225 };
226
227 static int axp20x_set_dcdc_freq(struct platform_device *pdev, u32 dcdcfreq)
228 {
229 struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent);
230 u32 min, max, def, step;
231
232 switch (axp20x->variant) {
233 case AXP202_ID:
234 case AXP209_ID:
235 min = 750;
236 max = 1875;
237 def = 1500;
238 step = 75;
239 break;
240 case AXP221_ID:
241 case AXP223_ID:
242 min = 1800;
243 max = 4050;
244 def = 3000;
245 step = 150;
246 break;
247 default:
248 dev_err(&pdev->dev,
249 "Setting DCDC frequency for unsupported AXP variant\n");
250 return -EINVAL;
251 }
252
253 if (dcdcfreq == 0)
254 dcdcfreq = def;
255
256 if (dcdcfreq < min) {
257 dcdcfreq = min;
258 dev_warn(&pdev->dev, "DCDC frequency too low. Set to %ukHz\n",
259 min);
260 }
261
262 if (dcdcfreq > max) {
263 dcdcfreq = max;
264 dev_warn(&pdev->dev, "DCDC frequency too high. Set to %ukHz\n",
265 max);
266 }
267
268 dcdcfreq = (dcdcfreq - min) / step;
269
270 return regmap_update_bits(axp20x->regmap, AXP20X_DCDC_FREQ,
271 AXP20X_FREQ_DCDC_MASK, dcdcfreq);
272 }
273
274 static int axp20x_regulator_parse_dt(struct platform_device *pdev)
275 {
276 struct device_node *np, *regulators;
277 int ret;
278 u32 dcdcfreq = 0;
279
280 np = of_node_get(pdev->dev.parent->of_node);
281 if (!np)
282 return 0;
283
284 regulators = of_get_child_by_name(np, "regulators");
285 if (!regulators) {
286 dev_warn(&pdev->dev, "regulators node not found\n");
287 } else {
288 of_property_read_u32(regulators, "x-powers,dcdc-freq", &dcdcfreq);
289 ret = axp20x_set_dcdc_freq(pdev, dcdcfreq);
290 if (ret < 0) {
291 dev_err(&pdev->dev, "Error setting dcdc frequency: %d\n", ret);
292 return ret;
293 }
294
295 of_node_put(regulators);
296 }
297
298 return 0;
299 }
300
301 static int axp20x_set_dcdc_workmode(struct regulator_dev *rdev, int id, u32 workmode)
302 {
303 struct axp20x_dev *axp20x = rdev_get_drvdata(rdev);
304 unsigned int mask;
305
306 switch (axp20x->variant) {
307 case AXP202_ID:
308 case AXP209_ID:
309 if ((id != AXP20X_DCDC2) && (id != AXP20X_DCDC3))
310 return -EINVAL;
311
312 mask = AXP20X_WORKMODE_DCDC2_MASK;
313 if (id == AXP20X_DCDC3)
314 mask = AXP20X_WORKMODE_DCDC3_MASK;
315
316 workmode <<= ffs(mask) - 1;
317 break;
318
319 case AXP221_ID:
320 case AXP223_ID:
321 if (id < AXP22X_DCDC1 || id > AXP22X_DCDC5)
322 return -EINVAL;
323
324 mask = AXP22X_WORKMODE_DCDCX_MASK(id - AXP22X_DCDC1);
325 workmode <<= id - AXP22X_DCDC1;
326 break;
327
328 default:
329 /* should not happen */
330 WARN_ON(1);
331 return -EINVAL;
332 }
333
334 return regmap_update_bits(rdev->regmap, AXP20X_DCDC_MODE, mask, workmode);
335 }
336
337 static int axp20x_regulator_probe(struct platform_device *pdev)
338 {
339 struct regulator_dev *rdev;
340 struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent);
341 const struct regulator_desc *regulators;
342 struct regulator_config config = {
343 .dev = pdev->dev.parent,
344 .regmap = axp20x->regmap,
345 .driver_data = axp20x,
346 };
347 int ret, i, nregulators;
348 u32 workmode;
349 const char *axp22x_dc1_name = axp22x_regulators[AXP22X_DCDC1].name;
350 const char *axp22x_dc5_name = axp22x_regulators[AXP22X_DCDC5].name;
351
352 switch (axp20x->variant) {
353 case AXP202_ID:
354 case AXP209_ID:
355 regulators = axp20x_regulators;
356 nregulators = AXP20X_REG_ID_MAX;
357 break;
358 case AXP221_ID:
359 case AXP223_ID:
360 regulators = axp22x_regulators;
361 nregulators = AXP22X_REG_ID_MAX;
362 break;
363 default:
364 dev_err(&pdev->dev, "Unsupported AXP variant: %ld\n",
365 axp20x->variant);
366 return -EINVAL;
367 }
368
369 /* This only sets the dcdc freq. Ignore any errors */
370 axp20x_regulator_parse_dt(pdev);
371
372 for (i = 0; i < nregulators; i++) {
373 const struct regulator_desc *desc = &regulators[i];
374 struct regulator_desc *new_desc;
375
376 /*
377 * Regulators DC1SW and DC5LDO are connected internally,
378 * so we have to handle their supply names separately.
379 *
380 * We always register the regulators in proper sequence,
381 * so the supply names are correctly read. See the last
382 * part of this loop to see where we save the DT defined
383 * name.
384 */
385 if (regulators == axp22x_regulators) {
386 if (i == AXP22X_DC1SW) {
387 new_desc = devm_kzalloc(&pdev->dev,
388 sizeof(*desc),
389 GFP_KERNEL);
390 *new_desc = regulators[i];
391 new_desc->supply_name = axp22x_dc1_name;
392 desc = new_desc;
393 } else if (i == AXP22X_DC5LDO) {
394 new_desc = devm_kzalloc(&pdev->dev,
395 sizeof(*desc),
396 GFP_KERNEL);
397 *new_desc = regulators[i];
398 new_desc->supply_name = axp22x_dc5_name;
399 desc = new_desc;
400 }
401 }
402
403 rdev = devm_regulator_register(&pdev->dev, desc, &config);
404 if (IS_ERR(rdev)) {
405 dev_err(&pdev->dev, "Failed to register %s\n",
406 regulators[i].name);
407
408 return PTR_ERR(rdev);
409 }
410
411 ret = of_property_read_u32(rdev->dev.of_node,
412 "x-powers,dcdc-workmode",
413 &workmode);
414 if (!ret) {
415 if (axp20x_set_dcdc_workmode(rdev, i, workmode))
416 dev_err(&pdev->dev, "Failed to set workmode on %s\n",
417 rdev->desc->name);
418 }
419
420 /*
421 * Save AXP22X DCDC1 / DCDC5 regulator names for later.
422 */
423 if (regulators == axp22x_regulators) {
424 /* Can we use rdev->constraints->name instead? */
425 if (i == AXP22X_DCDC1)
426 of_property_read_string(rdev->dev.of_node,
427 "regulator-name",
428 &axp22x_dc1_name);
429 else if (i == AXP22X_DCDC5)
430 of_property_read_string(rdev->dev.of_node,
431 "regulator-name",
432 &axp22x_dc5_name);
433 }
434 }
435
436 return 0;
437 }
438
439 static struct platform_driver axp20x_regulator_driver = {
440 .probe = axp20x_regulator_probe,
441 .driver = {
442 .name = "axp20x-regulator",
443 },
444 };
445
446 module_platform_driver(axp20x_regulator_driver);
447
448 MODULE_LICENSE("GPL v2");
449 MODULE_AUTHOR("Carlo Caione <carlo@caione.org>");
450 MODULE_DESCRIPTION("Regulator Driver for AXP20X PMIC");
451 MODULE_ALIAS("platform:axp20x-regulator");
Linux with added FPC-III support