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[deliverable/linux.git] / drivers / regulator / axp20x-regulator.c
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, 0x9, 0),
161 REGULATOR_LINEAR_RANGE(2700000, 0xa, 0xb, 100000),
162 REGULATOR_LINEAR_RANGE(3000000, 0xc, 0xf, 100000),
163 };
164
165 static const struct regulator_desc axp20x_regulators[] = {
166 AXP_DESC(AXP20X, DCDC2, "dcdc2", "vin2", 700, 2275, 25,
167 AXP20X_DCDC2_V_OUT, 0x3f, AXP20X_PWR_OUT_CTRL, 0x10),
168 AXP_DESC(AXP20X, DCDC3, "dcdc3", "vin3", 700, 3500, 25,
169 AXP20X_DCDC3_V_OUT, 0x7f, AXP20X_PWR_OUT_CTRL, 0x02),
170 AXP_DESC_FIXED(AXP20X, LDO1, "ldo1", "acin", 1300),
171 AXP_DESC(AXP20X, LDO2, "ldo2", "ldo24in", 1800, 3300, 100,
172 AXP20X_LDO24_V_OUT, 0xf0, AXP20X_PWR_OUT_CTRL, 0x04),
173 AXP_DESC(AXP20X, LDO3, "ldo3", "ldo3in", 700, 3500, 25,
174 AXP20X_LDO3_V_OUT, 0x7f, AXP20X_PWR_OUT_CTRL, 0x40),
175 AXP_DESC_RANGES(AXP20X, LDO4, "ldo4", "ldo24in", axp20x_ldo4_ranges,
176 16, AXP20X_LDO24_V_OUT, 0x0f, AXP20X_PWR_OUT_CTRL,
177 0x08),
178 AXP_DESC_IO(AXP20X, LDO5, "ldo5", "ldo5in", 1800, 3300, 100,
179 AXP20X_LDO5_V_OUT, 0xf0, AXP20X_GPIO0_CTRL, 0x07,
180 AXP20X_IO_ENABLED, AXP20X_IO_DISABLED),
181 };
182
183 static const struct regulator_desc axp22x_regulators[] = {
184 AXP_DESC(AXP22X, DCDC1, "dcdc1", "vin1", 1600, 3400, 100,
185 AXP22X_DCDC1_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL1, BIT(1)),
186 AXP_DESC(AXP22X, DCDC2, "dcdc2", "vin2", 600, 1540, 20,
187 AXP22X_DCDC2_V_OUT, 0x3f, AXP22X_PWR_OUT_CTRL1, BIT(2)),
188 AXP_DESC(AXP22X, DCDC3, "dcdc3", "vin3", 600, 1860, 20,
189 AXP22X_DCDC3_V_OUT, 0x3f, AXP22X_PWR_OUT_CTRL1, BIT(3)),
190 AXP_DESC(AXP22X, DCDC4, "dcdc4", "vin4", 600, 1540, 20,
191 AXP22X_DCDC4_V_OUT, 0x3f, AXP22X_PWR_OUT_CTRL1, BIT(4)),
192 AXP_DESC(AXP22X, DCDC5, "dcdc5", "vin5", 1000, 2550, 50,
193 AXP22X_DCDC5_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL1, BIT(5)),
194 /* secondary switchable output of DCDC1 */
195 AXP_DESC_SW(AXP22X, DC1SW, "dc1sw", NULL, AXP22X_PWR_OUT_CTRL2,
196 BIT(7)),
197 /* LDO regulator internally chained to DCDC5 */
198 AXP_DESC(AXP22X, DC5LDO, "dc5ldo", NULL, 700, 1400, 100,
199 AXP22X_DC5LDO_V_OUT, 0x7, AXP22X_PWR_OUT_CTRL1, BIT(0)),
200 AXP_DESC(AXP22X, ALDO1, "aldo1", "aldoin", 700, 3300, 100,
201 AXP22X_ALDO1_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL1, BIT(6)),
202 AXP_DESC(AXP22X, ALDO2, "aldo2", "aldoin", 700, 3300, 100,
203 AXP22X_ALDO2_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL1, BIT(7)),
204 AXP_DESC(AXP22X, ALDO3, "aldo3", "aldoin", 700, 3300, 100,
205 AXP22X_ALDO3_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL3, BIT(7)),
206 AXP_DESC(AXP22X, DLDO1, "dldo1", "dldoin", 700, 3300, 100,
207 AXP22X_DLDO1_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2, BIT(3)),
208 AXP_DESC(AXP22X, DLDO2, "dldo2", "dldoin", 700, 3300, 100,
209 AXP22X_DLDO2_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2, BIT(4)),
210 AXP_DESC(AXP22X, DLDO3, "dldo3", "dldoin", 700, 3300, 100,
211 AXP22X_DLDO3_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2, BIT(5)),
212 AXP_DESC(AXP22X, DLDO4, "dldo4", "dldoin", 700, 3300, 100,
213 AXP22X_DLDO4_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2, BIT(6)),
214 AXP_DESC(AXP22X, ELDO1, "eldo1", "eldoin", 700, 3300, 100,
215 AXP22X_ELDO1_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2, BIT(0)),
216 AXP_DESC(AXP22X, ELDO2, "eldo2", "eldoin", 700, 3300, 100,
217 AXP22X_ELDO2_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2, BIT(1)),
218 AXP_DESC(AXP22X, ELDO3, "eldo3", "eldoin", 700, 3300, 100,
219 AXP22X_ELDO3_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2, BIT(2)),
220 /* Note the datasheet only guarantees reliable operation up to
221 * 3.3V, this needs to be enforced via dts provided constraints */
222 AXP_DESC_IO(AXP22X, LDO_IO0, "ldo_io0", "ips", 700, 3800, 100,
223 AXP22X_LDO_IO0_V_OUT, 0x1f, AXP20X_GPIO0_CTRL, 0x07,
224 AXP22X_IO_ENABLED, AXP22X_IO_DISABLED),
225 /* Note the datasheet only guarantees reliable operation up to
226 * 3.3V, this needs to be enforced via dts provided constraints */
227 AXP_DESC_IO(AXP22X, LDO_IO1, "ldo_io1", "ips", 700, 3800, 100,
228 AXP22X_LDO_IO1_V_OUT, 0x1f, AXP20X_GPIO1_CTRL, 0x07,
229 AXP22X_IO_ENABLED, AXP22X_IO_DISABLED),
230 AXP_DESC_FIXED(AXP22X, RTC_LDO, "rtc_ldo", "ips", 3000),
231 };
232
233 static int axp20x_set_dcdc_freq(struct platform_device *pdev, u32 dcdcfreq)
234 {
235 struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent);
236 u32 min, max, def, step;
237
238 switch (axp20x->variant) {
239 case AXP202_ID:
240 case AXP209_ID:
241 min = 750;
242 max = 1875;
243 def = 1500;
244 step = 75;
245 break;
246 case AXP221_ID:
247 case AXP223_ID:
248 min = 1800;
249 max = 4050;
250 def = 3000;
251 step = 150;
252 break;
253 default:
254 dev_err(&pdev->dev,
255 "Setting DCDC frequency for unsupported AXP variant\n");
256 return -EINVAL;
257 }
258
259 if (dcdcfreq == 0)
260 dcdcfreq = def;
261
262 if (dcdcfreq < min) {
263 dcdcfreq = min;
264 dev_warn(&pdev->dev, "DCDC frequency too low. Set to %ukHz\n",
265 min);
266 }
267
268 if (dcdcfreq > max) {
269 dcdcfreq = max;
270 dev_warn(&pdev->dev, "DCDC frequency too high. Set to %ukHz\n",
271 max);
272 }
273
274 dcdcfreq = (dcdcfreq - min) / step;
275
276 return regmap_update_bits(axp20x->regmap, AXP20X_DCDC_FREQ,
277 AXP20X_FREQ_DCDC_MASK, dcdcfreq);
278 }
279
280 static int axp20x_regulator_parse_dt(struct platform_device *pdev)
281 {
282 struct device_node *np, *regulators;
283 int ret;
284 u32 dcdcfreq = 0;
285
286 np = of_node_get(pdev->dev.parent->of_node);
287 if (!np)
288 return 0;
289
290 regulators = of_get_child_by_name(np, "regulators");
291 if (!regulators) {
292 dev_warn(&pdev->dev, "regulators node not found\n");
293 } else {
294 of_property_read_u32(regulators, "x-powers,dcdc-freq", &dcdcfreq);
295 ret = axp20x_set_dcdc_freq(pdev, dcdcfreq);
296 if (ret < 0) {
297 dev_err(&pdev->dev, "Error setting dcdc frequency: %d\n", ret);
298 return ret;
299 }
300
301 of_node_put(regulators);
302 }
303
304 return 0;
305 }
306
307 static int axp20x_set_dcdc_workmode(struct regulator_dev *rdev, int id, u32 workmode)
308 {
309 struct axp20x_dev *axp20x = rdev_get_drvdata(rdev);
310 unsigned int mask;
311
312 switch (axp20x->variant) {
313 case AXP202_ID:
314 case AXP209_ID:
315 if ((id != AXP20X_DCDC2) && (id != AXP20X_DCDC3))
316 return -EINVAL;
317
318 mask = AXP20X_WORKMODE_DCDC2_MASK;
319 if (id == AXP20X_DCDC3)
320 mask = AXP20X_WORKMODE_DCDC3_MASK;
321
322 workmode <<= ffs(mask) - 1;
323 break;
324
325 case AXP221_ID:
326 case AXP223_ID:
327 if (id < AXP22X_DCDC1 || id > AXP22X_DCDC5)
328 return -EINVAL;
329
330 mask = AXP22X_WORKMODE_DCDCX_MASK(id - AXP22X_DCDC1);
331 workmode <<= id - AXP22X_DCDC1;
332 break;
333
334 default:
335 /* should not happen */
336 WARN_ON(1);
337 return -EINVAL;
338 }
339
340 return regmap_update_bits(rdev->regmap, AXP20X_DCDC_MODE, mask, workmode);
341 }
342
343 static int axp20x_regulator_probe(struct platform_device *pdev)
344 {
345 struct regulator_dev *rdev;
346 struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent);
347 const struct regulator_desc *regulators;
348 struct regulator_config config = {
349 .dev = pdev->dev.parent,
350 .regmap = axp20x->regmap,
351 .driver_data = axp20x,
352 };
353 int ret, i, nregulators;
354 u32 workmode;
355 const char *axp22x_dc1_name = axp22x_regulators[AXP22X_DCDC1].name;
356 const char *axp22x_dc5_name = axp22x_regulators[AXP22X_DCDC5].name;
357
358 switch (axp20x->variant) {
359 case AXP202_ID:
360 case AXP209_ID:
361 regulators = axp20x_regulators;
362 nregulators = AXP20X_REG_ID_MAX;
363 break;
364 case AXP221_ID:
365 case AXP223_ID:
366 regulators = axp22x_regulators;
367 nregulators = AXP22X_REG_ID_MAX;
368 break;
369 default:
370 dev_err(&pdev->dev, "Unsupported AXP variant: %ld\n",
371 axp20x->variant);
372 return -EINVAL;
373 }
374
375 /* This only sets the dcdc freq. Ignore any errors */
376 axp20x_regulator_parse_dt(pdev);
377
378 for (i = 0; i < nregulators; i++) {
379 const struct regulator_desc *desc = &regulators[i];
380 struct regulator_desc *new_desc;
381
382 /*
383 * Regulators DC1SW and DC5LDO are connected internally,
384 * so we have to handle their supply names separately.
385 *
386 * We always register the regulators in proper sequence,
387 * so the supply names are correctly read. See the last
388 * part of this loop to see where we save the DT defined
389 * name.
390 */
391 if (regulators == axp22x_regulators) {
392 if (i == AXP22X_DC1SW) {
393 new_desc = devm_kzalloc(&pdev->dev,
394 sizeof(*desc),
395 GFP_KERNEL);
396 *new_desc = regulators[i];
397 new_desc->supply_name = axp22x_dc1_name;
398 desc = new_desc;
399 } else if (i == AXP22X_DC5LDO) {
400 new_desc = devm_kzalloc(&pdev->dev,
401 sizeof(*desc),
402 GFP_KERNEL);
403 *new_desc = regulators[i];
404 new_desc->supply_name = axp22x_dc5_name;
405 desc = new_desc;
406 }
407 }
408
409 rdev = devm_regulator_register(&pdev->dev, desc, &config);
410 if (IS_ERR(rdev)) {
411 dev_err(&pdev->dev, "Failed to register %s\n",
412 regulators[i].name);
413
414 return PTR_ERR(rdev);
415 }
416
417 ret = of_property_read_u32(rdev->dev.of_node,
418 "x-powers,dcdc-workmode",
419 &workmode);
420 if (!ret) {
421 if (axp20x_set_dcdc_workmode(rdev, i, workmode))
422 dev_err(&pdev->dev, "Failed to set workmode on %s\n",
423 rdev->desc->name);
424 }
425
426 /*
427 * Save AXP22X DCDC1 / DCDC5 regulator names for later.
428 */
429 if (regulators == axp22x_regulators) {
430 /* Can we use rdev->constraints->name instead? */
431 if (i == AXP22X_DCDC1)
432 of_property_read_string(rdev->dev.of_node,
433 "regulator-name",
434 &axp22x_dc1_name);
435 else if (i == AXP22X_DCDC5)
436 of_property_read_string(rdev->dev.of_node,
437 "regulator-name",
438 &axp22x_dc5_name);
439 }
440 }
441
442 return 0;
443 }
444
445 static struct platform_driver axp20x_regulator_driver = {
446 .probe = axp20x_regulator_probe,
447 .driver = {
448 .name = "axp20x-regulator",
449 },
450 };
451
452 module_platform_driver(axp20x_regulator_driver);
453
454 MODULE_LICENSE("GPL v2");
455 MODULE_AUTHOR("Carlo Caione <carlo@caione.org>");
456 MODULE_DESCRIPTION("Regulator Driver for AXP20X PMIC");
457 MODULE_ALIAS("platform:axp20x-regulator");
Linux kernel - Deliverables
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