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fuse: initialize fc->release before calling it
[linux/fpc-iii.git] / drivers / regulator / rk808-regulator.c
blob3fd44353cc80eea153fe1118c81180b5e2d21b67
1 /*
2 * Regulator driver for Rockchip RK808
3 *
4 * Copyright (c) 2014, Fuzhou Rockchip Electronics Co., Ltd
5 *
6 * Author: Chris Zhong <zyw@rock-chips.com>
7 * Author: Zhang Qing <zhangqing@rock-chips.com>
8 *
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms and conditions of the GNU General Public License,
11 * version 2, as published by the Free Software Foundation.
12 *
13 * This program is distributed in the hope it will be useful, but WITHOUT
14 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
16 * more details.
17 */
18
19 #include <linux/module.h>
20 #include <linux/i2c.h>
21 #include <linux/mfd/rk808.h>
22 #include <linux/of_device.h>
23 #include <linux/regulator/driver.h>
24 #include <linux/regulator/of_regulator.h>
25
26 /* Field Definitions */
27 #define RK808_BUCK_VSEL_MASK 0x3f
28 #define RK808_BUCK4_VSEL_MASK 0xf
29 #define RK808_LDO_VSEL_MASK 0x1f
30
31 /* Ramp rate definitions for buck1 / buck2 only */
32 #define RK808_RAMP_RATE_OFFSET 3
33 #define RK808_RAMP_RATE_MASK (3 << RK808_RAMP_RATE_OFFSET)
34 #define RK808_RAMP_RATE_2MV_PER_US (0 << RK808_RAMP_RATE_OFFSET)
35 #define RK808_RAMP_RATE_4MV_PER_US (1 << RK808_RAMP_RATE_OFFSET)
36 #define RK808_RAMP_RATE_6MV_PER_US (2 << RK808_RAMP_RATE_OFFSET)
37 #define RK808_RAMP_RATE_10MV_PER_US (3 << RK808_RAMP_RATE_OFFSET)
38
39 /* Offset from XXX_ON_VSEL to XXX_SLP_VSEL */
40 #define RK808_SLP_REG_OFFSET 1
41
42 /* Offset from XXX_EN_REG to SLEEP_SET_OFF_XXX */
43 #define RK808_SLP_SET_OFF_REG_OFFSET 2
44
45 static const int rk808_buck_config_regs[] = {
46 RK808_BUCK1_CONFIG_REG,
47 RK808_BUCK2_CONFIG_REG,
48 RK808_BUCK3_CONFIG_REG,
49 RK808_BUCK4_CONFIG_REG,
50 };
51
52 static const struct regulator_linear_range rk808_buck_voltage_ranges[] = {
53 REGULATOR_LINEAR_RANGE(712500, 0, 63, 12500),
54 };
55
56 static const struct regulator_linear_range rk808_buck4_voltage_ranges[] = {
57 REGULATOR_LINEAR_RANGE(1800000, 0, 15, 100000),
58 };
59
60 static const struct regulator_linear_range rk808_ldo_voltage_ranges[] = {
61 REGULATOR_LINEAR_RANGE(1800000, 0, 16, 100000),
62 };
63
64 static const struct regulator_linear_range rk808_ldo3_voltage_ranges[] = {
65 REGULATOR_LINEAR_RANGE(800000, 0, 13, 100000),
66 REGULATOR_LINEAR_RANGE(2500000, 15, 15, 0),
67 };
68
69 static const struct regulator_linear_range rk808_ldo6_voltage_ranges[] = {
70 REGULATOR_LINEAR_RANGE(800000, 0, 17, 100000),
71 };
72
73 static int rk808_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay)
74 {
75 unsigned int ramp_value = RK808_RAMP_RATE_10MV_PER_US;
76 unsigned int reg = rk808_buck_config_regs[rdev->desc->id -
77 RK808_ID_DCDC1];
78
79 switch (ramp_delay) {
80 case 1 ... 2000:
81 ramp_value = RK808_RAMP_RATE_2MV_PER_US;
82 break;
83 case 2001 ... 4000:
84 ramp_value = RK808_RAMP_RATE_4MV_PER_US;
85 break;
86 case 4001 ... 6000:
87 ramp_value = RK808_RAMP_RATE_6MV_PER_US;
88 break;
89 case 6001 ... 10000:
90 break;
91 default:
92 pr_warn("%s ramp_delay: %d not supported, setting 10000\n",
93 rdev->desc->name, ramp_delay);
94 }
95
96 return regmap_update_bits(rdev->regmap, reg,
97 RK808_RAMP_RATE_MASK, ramp_value);
98 }
99
100 static int rk808_set_suspend_voltage(struct regulator_dev *rdev, int uv)
101 {
102 unsigned int reg;
103 int sel = regulator_map_voltage_linear_range(rdev, uv, uv);
104
105 if (sel < 0)
106 return -EINVAL;
107
108 reg = rdev->desc->vsel_reg + RK808_SLP_REG_OFFSET;
109
110 return regmap_update_bits(rdev->regmap, reg,
111 rdev->desc->vsel_mask,
112 sel);
113 }
114
115 static int rk808_set_suspend_enable(struct regulator_dev *rdev)
116 {
117 unsigned int reg;
118
119 reg = rdev->desc->enable_reg + RK808_SLP_SET_OFF_REG_OFFSET;
120
121 return regmap_update_bits(rdev->regmap, reg,
122 rdev->desc->enable_mask,
123 0);
124 }
125
126 static int rk808_set_suspend_disable(struct regulator_dev *rdev)
127 {
128 unsigned int reg;
129
130 reg = rdev->desc->enable_reg + RK808_SLP_SET_OFF_REG_OFFSET;
131
132 return regmap_update_bits(rdev->regmap, reg,
133 rdev->desc->enable_mask,
134 rdev->desc->enable_mask);
135 }
136
137 static struct regulator_ops rk808_buck1_2_ops = {
138 .list_voltage = regulator_list_voltage_linear_range,
139 .map_voltage = regulator_map_voltage_linear_range,
140 .get_voltage_sel = regulator_get_voltage_sel_regmap,
141 .set_voltage_sel = regulator_set_voltage_sel_regmap,
142 .enable = regulator_enable_regmap,
143 .disable = regulator_disable_regmap,
144 .is_enabled = regulator_is_enabled_regmap,
145 .set_ramp_delay = rk808_set_ramp_delay,
146 .set_suspend_voltage = rk808_set_suspend_voltage,
147 .set_suspend_enable = rk808_set_suspend_enable,
148 .set_suspend_disable = rk808_set_suspend_disable,
149 };
150
151 static struct regulator_ops rk808_reg_ops = {
152 .list_voltage = regulator_list_voltage_linear_range,
153 .map_voltage = regulator_map_voltage_linear_range,
154 .get_voltage_sel = regulator_get_voltage_sel_regmap,
155 .set_voltage_sel = regulator_set_voltage_sel_regmap,
156 .enable = regulator_enable_regmap,
157 .disable = regulator_disable_regmap,
158 .is_enabled = regulator_is_enabled_regmap,
159 .set_suspend_voltage = rk808_set_suspend_voltage,
160 .set_suspend_enable = rk808_set_suspend_enable,
161 .set_suspend_disable = rk808_set_suspend_disable,
162 };
163
164 static struct regulator_ops rk808_switch_ops = {
165 .enable = regulator_enable_regmap,
166 .disable = regulator_disable_regmap,
167 .is_enabled = regulator_is_enabled_regmap,
168 .set_suspend_enable = rk808_set_suspend_enable,
169 .set_suspend_disable = rk808_set_suspend_disable,
170 };
171
172 static const struct regulator_desc rk808_reg[] = {
173 {
174 .name = "DCDC_REG1",
175 .supply_name = "vcc1",
176 .id = RK808_ID_DCDC1,
177 .ops = &rk808_buck1_2_ops,
178 .type = REGULATOR_VOLTAGE,
179 .n_voltages = 64,
180 .linear_ranges = rk808_buck_voltage_ranges,
181 .n_linear_ranges = ARRAY_SIZE(rk808_buck_voltage_ranges),
182 .vsel_reg = RK808_BUCK1_ON_VSEL_REG,
183 .vsel_mask = RK808_BUCK_VSEL_MASK,
184 .enable_reg = RK808_DCDC_EN_REG,
185 .enable_mask = BIT(0),
186 .owner = THIS_MODULE,
187 }, {
188 .name = "DCDC_REG2",
189 .supply_name = "vcc2",
190 .id = RK808_ID_DCDC2,
191 .ops = &rk808_buck1_2_ops,
192 .type = REGULATOR_VOLTAGE,
193 .n_voltages = 64,
194 .linear_ranges = rk808_buck_voltage_ranges,
195 .n_linear_ranges = ARRAY_SIZE(rk808_buck_voltage_ranges),
196 .vsel_reg = RK808_BUCK2_ON_VSEL_REG,
197 .vsel_mask = RK808_BUCK_VSEL_MASK,
198 .enable_reg = RK808_DCDC_EN_REG,
199 .enable_mask = BIT(1),
200 .owner = THIS_MODULE,
201 }, {
202 .name = "DCDC_REG3",
203 .supply_name = "vcc3",
204 .id = RK808_ID_DCDC3,
205 .ops = &rk808_switch_ops,
206 .type = REGULATOR_VOLTAGE,
207 .n_voltages = 1,
208 .enable_reg = RK808_DCDC_EN_REG,
209 .enable_mask = BIT(2),
210 .owner = THIS_MODULE,
211 }, {
212 .name = "DCDC_REG4",
213 .supply_name = "vcc4",
214 .id = RK808_ID_DCDC4,
215 .ops = &rk808_reg_ops,
216 .type = REGULATOR_VOLTAGE,
217 .n_voltages = 16,
218 .linear_ranges = rk808_buck4_voltage_ranges,
219 .n_linear_ranges = ARRAY_SIZE(rk808_buck4_voltage_ranges),
220 .vsel_reg = RK808_BUCK4_ON_VSEL_REG,
221 .vsel_mask = RK808_BUCK4_VSEL_MASK,
222 .enable_reg = RK808_DCDC_EN_REG,
223 .enable_mask = BIT(3),
224 .owner = THIS_MODULE,
225 }, {
226 .name = "LDO_REG1",
227 .supply_name = "vcc6",
228 .id = RK808_ID_LDO1,
229 .ops = &rk808_reg_ops,
230 .type = REGULATOR_VOLTAGE,
231 .n_voltages = 17,
232 .linear_ranges = rk808_ldo_voltage_ranges,
233 .n_linear_ranges = ARRAY_SIZE(rk808_ldo_voltage_ranges),
234 .vsel_reg = RK808_LDO1_ON_VSEL_REG,
235 .vsel_mask = RK808_LDO_VSEL_MASK,
236 .enable_reg = RK808_LDO_EN_REG,
237 .enable_mask = BIT(0),
238 .enable_time = 400,
239 .owner = THIS_MODULE,
240 }, {
241 .name = "LDO_REG2",
242 .supply_name = "vcc6",
243 .id = RK808_ID_LDO2,
244 .ops = &rk808_reg_ops,
245 .type = REGULATOR_VOLTAGE,
246 .n_voltages = 17,
247 .linear_ranges = rk808_ldo_voltage_ranges,
248 .n_linear_ranges = ARRAY_SIZE(rk808_ldo_voltage_ranges),
249 .vsel_reg = RK808_LDO2_ON_VSEL_REG,
250 .vsel_mask = RK808_LDO_VSEL_MASK,
251 .enable_reg = RK808_LDO_EN_REG,
252 .enable_mask = BIT(1),
253 .enable_time = 400,
254 .owner = THIS_MODULE,
255 }, {
256 .name = "LDO_REG3",
257 .supply_name = "vcc7",
258 .id = RK808_ID_LDO3,
259 .ops = &rk808_reg_ops,
260 .type = REGULATOR_VOLTAGE,
261 .n_voltages = 16,
262 .linear_ranges = rk808_ldo3_voltage_ranges,
263 .n_linear_ranges = ARRAY_SIZE(rk808_ldo3_voltage_ranges),
264 .vsel_reg = RK808_LDO3_ON_VSEL_REG,
265 .vsel_mask = RK808_BUCK4_VSEL_MASK,
266 .enable_reg = RK808_LDO_EN_REG,
267 .enable_mask = BIT(2),
268 .enable_time = 400,
269 .owner = THIS_MODULE,
270 }, {
271 .name = "LDO_REG4",
272 .supply_name = "vcc9",
273 .id = RK808_ID_LDO4,
274 .ops = &rk808_reg_ops,
275 .type = REGULATOR_VOLTAGE,
276 .n_voltages = 17,
277 .linear_ranges = rk808_ldo_voltage_ranges,
278 .n_linear_ranges = ARRAY_SIZE(rk808_ldo_voltage_ranges),
279 .vsel_reg = RK808_LDO4_ON_VSEL_REG,
280 .vsel_mask = RK808_LDO_VSEL_MASK,
281 .enable_reg = RK808_LDO_EN_REG,
282 .enable_mask = BIT(3),
283 .enable_time = 400,
284 .owner = THIS_MODULE,
285 }, {
286 .name = "LDO_REG5",
287 .supply_name = "vcc9",
288 .id = RK808_ID_LDO5,
289 .ops = &rk808_reg_ops,
290 .type = REGULATOR_VOLTAGE,
291 .n_voltages = 17,
292 .linear_ranges = rk808_ldo_voltage_ranges,
293 .n_linear_ranges = ARRAY_SIZE(rk808_ldo_voltage_ranges),
294 .vsel_reg = RK808_LDO5_ON_VSEL_REG,
295 .vsel_mask = RK808_LDO_VSEL_MASK,
296 .enable_reg = RK808_LDO_EN_REG,
297 .enable_mask = BIT(4),
298 .enable_time = 400,
299 .owner = THIS_MODULE,
300 }, {
301 .name = "LDO_REG6",
302 .supply_name = "vcc10",
303 .id = RK808_ID_LDO6,
304 .ops = &rk808_reg_ops,
305 .type = REGULATOR_VOLTAGE,
306 .n_voltages = 18,
307 .linear_ranges = rk808_ldo6_voltage_ranges,
308 .n_linear_ranges = ARRAY_SIZE(rk808_ldo6_voltage_ranges),
309 .vsel_reg = RK808_LDO6_ON_VSEL_REG,
310 .vsel_mask = RK808_LDO_VSEL_MASK,
311 .enable_reg = RK808_LDO_EN_REG,
312 .enable_mask = BIT(5),
313 .enable_time = 400,
314 .owner = THIS_MODULE,
315 }, {
316 .name = "LDO_REG7",
317 .supply_name = "vcc7",
318 .id = RK808_ID_LDO7,
319 .ops = &rk808_reg_ops,
320 .type = REGULATOR_VOLTAGE,
321 .n_voltages = 18,
322 .linear_ranges = rk808_ldo6_voltage_ranges,
323 .n_linear_ranges = ARRAY_SIZE(rk808_ldo6_voltage_ranges),
324 .vsel_reg = RK808_LDO7_ON_VSEL_REG,
325 .vsel_mask = RK808_LDO_VSEL_MASK,
326 .enable_reg = RK808_LDO_EN_REG,
327 .enable_mask = BIT(6),
328 .enable_time = 400,
329 .owner = THIS_MODULE,
330 }, {
331 .name = "LDO_REG8",
332 .supply_name = "vcc11",
333 .id = RK808_ID_LDO8,
334 .ops = &rk808_reg_ops,
335 .type = REGULATOR_VOLTAGE,
336 .n_voltages = 17,
337 .linear_ranges = rk808_ldo_voltage_ranges,
338 .n_linear_ranges = ARRAY_SIZE(rk808_ldo_voltage_ranges),
339 .vsel_reg = RK808_LDO8_ON_VSEL_REG,
340 .vsel_mask = RK808_LDO_VSEL_MASK,
341 .enable_reg = RK808_LDO_EN_REG,
342 .enable_mask = BIT(7),
343 .enable_time = 400,
344 .owner = THIS_MODULE,
345 }, {
346 .name = "SWITCH_REG1",
347 .supply_name = "vcc8",
348 .id = RK808_ID_SWITCH1,
349 .ops = &rk808_switch_ops,
350 .type = REGULATOR_VOLTAGE,
351 .enable_reg = RK808_DCDC_EN_REG,
352 .enable_mask = BIT(5),
353 .owner = THIS_MODULE,
354 }, {
355 .name = "SWITCH_REG2",
356 .supply_name = "vcc12",
357 .id = RK808_ID_SWITCH2,
358 .ops = &rk808_switch_ops,
359 .type = REGULATOR_VOLTAGE,
360 .enable_reg = RK808_DCDC_EN_REG,
361 .enable_mask = BIT(6),
362 .owner = THIS_MODULE,
363 },
364 };
365
366 static struct of_regulator_match rk808_reg_matches[] = {
367 [RK808_ID_DCDC1] = { .name = "DCDC_REG1" },
368 [RK808_ID_DCDC2] = { .name = "DCDC_REG2" },
369 [RK808_ID_DCDC3] = { .name = "DCDC_REG3" },
370 [RK808_ID_DCDC4] = { .name = "DCDC_REG4" },
371 [RK808_ID_LDO1] = { .name = "LDO_REG1" },
372 [RK808_ID_LDO2] = { .name = "LDO_REG2" },
373 [RK808_ID_LDO3] = { .name = "LDO_REG3" },
374 [RK808_ID_LDO4] = { .name = "LDO_REG4" },
375 [RK808_ID_LDO5] = { .name = "LDO_REG5" },
376 [RK808_ID_LDO6] = { .name = "LDO_REG6" },
377 [RK808_ID_LDO7] = { .name = "LDO_REG7" },
378 [RK808_ID_LDO8] = { .name = "LDO_REG8" },
379 [RK808_ID_SWITCH1] = { .name = "SWITCH_REG1" },
380 [RK808_ID_SWITCH2] = { .name = "SWITCH_REG2" },
381 };
382
383 static int rk808_regulator_probe(struct platform_device *pdev)
384 {
385 struct rk808 *rk808 = dev_get_drvdata(pdev->dev.parent);
386 struct i2c_client *client = rk808->i2c;
387 struct device_node *reg_np;
388 struct regulator_config config = {};
389 struct regulator_dev *rk808_rdev;
390 int ret, i;
391
392 reg_np = of_get_child_by_name(client->dev.of_node, "regulators");
393 if (!reg_np)
394 return -ENXIO;
395
396 ret = of_regulator_match(&pdev->dev, reg_np, rk808_reg_matches,
397 RK808_NUM_REGULATORS);
398 of_node_put(reg_np);
399 if (ret < 0)
400 return ret;
401
402 /* Instantiate the regulators */
403 for (i = 0; i < RK808_NUM_REGULATORS; i++) {
404 if (!rk808_reg_matches[i].init_data ||
405 !rk808_reg_matches[i].of_node)
406 continue;
407
408 config.dev = &client->dev;
409 config.driver_data = rk808;
410 config.regmap = rk808->regmap;
411 config.of_node = rk808_reg_matches[i].of_node;
412 config.init_data = rk808_reg_matches[i].init_data;
413
414 rk808_rdev = devm_regulator_register(&pdev->dev,
415 &rk808_reg[i], &config);
416 if (IS_ERR(rk808_rdev)) {
417 dev_err(&client->dev,
418 "failed to register %d regulator\n", i);
419 return PTR_ERR(rk808_rdev);
420 }
421 }
422
423 return 0;
424 }
425
426 static struct platform_driver rk808_regulator_driver = {
427 .probe = rk808_regulator_probe,
428 .driver = {
429 .name = "rk808-regulator",
430 },
431 };
432
433 module_platform_driver(rk808_regulator_driver);
434
435 MODULE_DESCRIPTION("regulator driver for the rk808 series PMICs");
436 MODULE_AUTHOR("Chris Zhong<zyw@rock-chips.com>");
437 MODULE_AUTHOR("Zhang Qing<zhangqing@rock-chips.com>");
438 MODULE_LICENSE("GPL");
439 MODULE_ALIAS("platform:rk808-regulator");
Linux with added FPC-III support