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2cd64ae3 CZ |
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. | |
2cd64ae3 CZ |
17 | */ |
18 | ||
19 | #include <linux/module.h> | |
2cd64ae3 | 20 | #include <linux/i2c.h> |
2cd64ae3 | 21 | #include <linux/mfd/rk808.h> |
2cd64ae3 CZ |
22 | #include <linux/of_device.h> |
23 | #include <linux/regulator/driver.h> | |
24 | #include <linux/regulator/of_regulator.h> | |
571a4010 CZ |
25 | |
26 | /* Field Definitions */ | |
2cd64ae3 CZ |
27 | #define RK808_BUCK_VSEL_MASK 0x3f |
28 | #define RK808_BUCK4_VSEL_MASK 0xf | |
29 | #define RK808_LDO_VSEL_MASK 0x1f | |
30 | ||
8af25227 DA |
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 | static const int rk808_buck_config_regs[] = { | |
40 | RK808_BUCK1_CONFIG_REG, | |
41 | RK808_BUCK2_CONFIG_REG, | |
42 | RK808_BUCK3_CONFIG_REG, | |
43 | RK808_BUCK4_CONFIG_REG, | |
44 | }; | |
45 | ||
2cd64ae3 CZ |
46 | static const struct regulator_linear_range rk808_buck_voltage_ranges[] = { |
47 | REGULATOR_LINEAR_RANGE(700000, 0, 63, 12500), | |
48 | }; | |
49 | ||
50 | static const struct regulator_linear_range rk808_buck4_voltage_ranges[] = { | |
51 | REGULATOR_LINEAR_RANGE(1800000, 0, 15, 100000), | |
52 | }; | |
53 | ||
54 | static const struct regulator_linear_range rk808_ldo_voltage_ranges[] = { | |
55 | REGULATOR_LINEAR_RANGE(1800000, 0, 16, 100000), | |
56 | }; | |
57 | ||
58 | static const struct regulator_linear_range rk808_ldo3_voltage_ranges[] = { | |
59 | REGULATOR_LINEAR_RANGE(800000, 0, 13, 100000), | |
60 | REGULATOR_LINEAR_RANGE(2500000, 15, 15, 0), | |
61 | }; | |
62 | ||
63 | static const struct regulator_linear_range rk808_ldo6_voltage_ranges[] = { | |
64 | REGULATOR_LINEAR_RANGE(800000, 0, 17, 100000), | |
65 | }; | |
66 | ||
8af25227 DA |
67 | static int rk808_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay) |
68 | { | |
69 | unsigned int ramp_value = RK808_RAMP_RATE_10MV_PER_US; | |
70 | unsigned int reg = rk808_buck_config_regs[rdev->desc->id - | |
71 | RK808_ID_DCDC1]; | |
72 | ||
73 | switch (ramp_delay) { | |
74 | case 1 ... 2000: | |
75 | ramp_value = RK808_RAMP_RATE_2MV_PER_US; | |
76 | break; | |
77 | case 2001 ... 4000: | |
78 | ramp_value = RK808_RAMP_RATE_4MV_PER_US; | |
79 | break; | |
80 | case 4001 ... 6000: | |
81 | ramp_value = RK808_RAMP_RATE_6MV_PER_US; | |
82 | break; | |
83 | case 6001 ... 10000: | |
84 | break; | |
85 | default: | |
86 | pr_warn("%s ramp_delay: %d not supported, setting 10000\n", | |
87 | rdev->desc->name, ramp_delay); | |
88 | } | |
89 | ||
90 | return regmap_update_bits(rdev->regmap, reg, | |
91 | RK808_RAMP_RATE_MASK, ramp_value); | |
92 | } | |
93 | ||
94 | static struct regulator_ops rk808_buck1_2_ops = { | |
95 | .list_voltage = regulator_list_voltage_linear_range, | |
96 | .map_voltage = regulator_map_voltage_linear_range, | |
97 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
98 | .set_voltage_sel = regulator_set_voltage_sel_regmap, | |
99 | .enable = regulator_enable_regmap, | |
100 | .disable = regulator_disable_regmap, | |
101 | .is_enabled = regulator_is_enabled_regmap, | |
102 | .set_ramp_delay = rk808_set_ramp_delay, | |
103 | }; | |
104 | ||
2cd64ae3 CZ |
105 | static struct regulator_ops rk808_reg_ops = { |
106 | .list_voltage = regulator_list_voltage_linear_range, | |
107 | .map_voltage = regulator_map_voltage_linear_range, | |
108 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
109 | .set_voltage_sel = regulator_set_voltage_sel_regmap, | |
110 | .enable = regulator_enable_regmap, | |
111 | .disable = regulator_disable_regmap, | |
112 | .is_enabled = regulator_is_enabled_regmap, | |
113 | }; | |
114 | ||
115 | static struct regulator_ops rk808_switch_ops = { | |
116 | .enable = regulator_enable_regmap, | |
117 | .disable = regulator_disable_regmap, | |
118 | .is_enabled = regulator_is_enabled_regmap, | |
119 | }; | |
120 | ||
121 | static const struct regulator_desc rk808_reg[] = { | |
122 | { | |
123 | .name = "DCDC_REG1", | |
b8074eba | 124 | .supply_name = "vcc1", |
2cd64ae3 | 125 | .id = RK808_ID_DCDC1, |
8af25227 | 126 | .ops = &rk808_buck1_2_ops, |
2cd64ae3 CZ |
127 | .type = REGULATOR_VOLTAGE, |
128 | .n_voltages = 64, | |
129 | .linear_ranges = rk808_buck_voltage_ranges, | |
130 | .n_linear_ranges = ARRAY_SIZE(rk808_buck_voltage_ranges), | |
131 | .vsel_reg = RK808_BUCK1_ON_VSEL_REG, | |
132 | .vsel_mask = RK808_BUCK_VSEL_MASK, | |
133 | .enable_reg = RK808_DCDC_EN_REG, | |
134 | .enable_mask = BIT(0), | |
135 | .owner = THIS_MODULE, | |
136 | }, { | |
137 | .name = "DCDC_REG2", | |
b8074eba | 138 | .supply_name = "vcc2", |
2cd64ae3 | 139 | .id = RK808_ID_DCDC2, |
8af25227 | 140 | .ops = &rk808_buck1_2_ops, |
2cd64ae3 CZ |
141 | .type = REGULATOR_VOLTAGE, |
142 | .n_voltages = 64, | |
143 | .linear_ranges = rk808_buck_voltage_ranges, | |
144 | .n_linear_ranges = ARRAY_SIZE(rk808_buck_voltage_ranges), | |
145 | .vsel_reg = RK808_BUCK2_ON_VSEL_REG, | |
146 | .vsel_mask = RK808_BUCK_VSEL_MASK, | |
147 | .enable_reg = RK808_DCDC_EN_REG, | |
148 | .enable_mask = BIT(1), | |
149 | .owner = THIS_MODULE, | |
150 | }, { | |
151 | .name = "DCDC_REG3", | |
b8074eba | 152 | .supply_name = "vcc3", |
2cd64ae3 CZ |
153 | .id = RK808_ID_DCDC3, |
154 | .ops = &rk808_switch_ops, | |
155 | .type = REGULATOR_VOLTAGE, | |
156 | .n_voltages = 1, | |
157 | .enable_reg = RK808_DCDC_EN_REG, | |
158 | .enable_mask = BIT(2), | |
159 | .owner = THIS_MODULE, | |
160 | }, { | |
161 | .name = "DCDC_REG4", | |
b8074eba | 162 | .supply_name = "vcc4", |
2cd64ae3 CZ |
163 | .id = RK808_ID_DCDC4, |
164 | .ops = &rk808_reg_ops, | |
165 | .type = REGULATOR_VOLTAGE, | |
5a82067f | 166 | .n_voltages = 16, |
2cd64ae3 CZ |
167 | .linear_ranges = rk808_buck4_voltage_ranges, |
168 | .n_linear_ranges = ARRAY_SIZE(rk808_buck4_voltage_ranges), | |
169 | .vsel_reg = RK808_BUCK4_ON_VSEL_REG, | |
170 | .vsel_mask = RK808_BUCK4_VSEL_MASK, | |
171 | .enable_reg = RK808_DCDC_EN_REG, | |
172 | .enable_mask = BIT(3), | |
173 | .owner = THIS_MODULE, | |
174 | }, { | |
175 | .name = "LDO_REG1", | |
b8074eba | 176 | .supply_name = "vcc6", |
2cd64ae3 CZ |
177 | .id = RK808_ID_LDO1, |
178 | .ops = &rk808_reg_ops, | |
179 | .type = REGULATOR_VOLTAGE, | |
180 | .n_voltages = 17, | |
181 | .linear_ranges = rk808_ldo_voltage_ranges, | |
182 | .n_linear_ranges = ARRAY_SIZE(rk808_ldo_voltage_ranges), | |
183 | .vsel_reg = RK808_LDO1_ON_VSEL_REG, | |
184 | .vsel_mask = RK808_LDO_VSEL_MASK, | |
185 | .enable_reg = RK808_LDO_EN_REG, | |
186 | .enable_mask = BIT(0), | |
187 | .owner = THIS_MODULE, | |
188 | }, { | |
189 | .name = "LDO_REG2", | |
b8074eba | 190 | .supply_name = "vcc6", |
2cd64ae3 CZ |
191 | .id = RK808_ID_LDO2, |
192 | .ops = &rk808_reg_ops, | |
193 | .type = REGULATOR_VOLTAGE, | |
194 | .n_voltages = 17, | |
195 | .linear_ranges = rk808_ldo_voltage_ranges, | |
196 | .n_linear_ranges = ARRAY_SIZE(rk808_ldo_voltage_ranges), | |
197 | .vsel_reg = RK808_LDO2_ON_VSEL_REG, | |
198 | .vsel_mask = RK808_LDO_VSEL_MASK, | |
199 | .enable_reg = RK808_LDO_EN_REG, | |
200 | .enable_mask = BIT(1), | |
201 | .owner = THIS_MODULE, | |
202 | }, { | |
203 | .name = "LDO_REG3", | |
b8074eba | 204 | .supply_name = "vcc7", |
2cd64ae3 CZ |
205 | .id = RK808_ID_LDO3, |
206 | .ops = &rk808_reg_ops, | |
207 | .type = REGULATOR_VOLTAGE, | |
208 | .n_voltages = 16, | |
209 | .linear_ranges = rk808_ldo3_voltage_ranges, | |
210 | .n_linear_ranges = ARRAY_SIZE(rk808_ldo3_voltage_ranges), | |
211 | .vsel_reg = RK808_LDO3_ON_VSEL_REG, | |
212 | .vsel_mask = RK808_BUCK4_VSEL_MASK, | |
213 | .enable_reg = RK808_LDO_EN_REG, | |
214 | .enable_mask = BIT(2), | |
215 | .owner = THIS_MODULE, | |
216 | }, { | |
217 | .name = "LDO_REG4", | |
b8074eba | 218 | .supply_name = "vcc9", |
2cd64ae3 CZ |
219 | .id = RK808_ID_LDO4, |
220 | .ops = &rk808_reg_ops, | |
221 | .type = REGULATOR_VOLTAGE, | |
222 | .n_voltages = 17, | |
223 | .linear_ranges = rk808_ldo_voltage_ranges, | |
224 | .n_linear_ranges = ARRAY_SIZE(rk808_ldo_voltage_ranges), | |
225 | .vsel_reg = RK808_LDO4_ON_VSEL_REG, | |
226 | .vsel_mask = RK808_LDO_VSEL_MASK, | |
227 | .enable_reg = RK808_LDO_EN_REG, | |
228 | .enable_mask = BIT(3), | |
229 | .owner = THIS_MODULE, | |
230 | }, { | |
231 | .name = "LDO_REG5", | |
b8074eba | 232 | .supply_name = "vcc9", |
2cd64ae3 CZ |
233 | .id = RK808_ID_LDO5, |
234 | .ops = &rk808_reg_ops, | |
235 | .type = REGULATOR_VOLTAGE, | |
236 | .n_voltages = 17, | |
237 | .linear_ranges = rk808_ldo_voltage_ranges, | |
238 | .n_linear_ranges = ARRAY_SIZE(rk808_ldo_voltage_ranges), | |
239 | .vsel_reg = RK808_LDO5_ON_VSEL_REG, | |
240 | .vsel_mask = RK808_LDO_VSEL_MASK, | |
241 | .enable_reg = RK808_LDO_EN_REG, | |
242 | .enable_mask = BIT(4), | |
243 | .owner = THIS_MODULE, | |
244 | }, { | |
245 | .name = "LDO_REG6", | |
b8074eba | 246 | .supply_name = "vcc10", |
2cd64ae3 CZ |
247 | .id = RK808_ID_LDO6, |
248 | .ops = &rk808_reg_ops, | |
249 | .type = REGULATOR_VOLTAGE, | |
250 | .n_voltages = 18, | |
251 | .linear_ranges = rk808_ldo6_voltage_ranges, | |
252 | .n_linear_ranges = ARRAY_SIZE(rk808_ldo6_voltage_ranges), | |
253 | .vsel_reg = RK808_LDO6_ON_VSEL_REG, | |
254 | .vsel_mask = RK808_LDO_VSEL_MASK, | |
255 | .enable_reg = RK808_LDO_EN_REG, | |
256 | .enable_mask = BIT(5), | |
257 | .owner = THIS_MODULE, | |
258 | }, { | |
259 | .name = "LDO_REG7", | |
b8074eba | 260 | .supply_name = "vcc7", |
2cd64ae3 CZ |
261 | .id = RK808_ID_LDO7, |
262 | .ops = &rk808_reg_ops, | |
263 | .type = REGULATOR_VOLTAGE, | |
264 | .n_voltages = 18, | |
265 | .linear_ranges = rk808_ldo6_voltage_ranges, | |
266 | .n_linear_ranges = ARRAY_SIZE(rk808_ldo6_voltage_ranges), | |
267 | .vsel_reg = RK808_LDO7_ON_VSEL_REG, | |
268 | .vsel_mask = RK808_LDO_VSEL_MASK, | |
269 | .enable_reg = RK808_LDO_EN_REG, | |
270 | .enable_mask = BIT(6), | |
271 | .owner = THIS_MODULE, | |
272 | }, { | |
273 | .name = "LDO_REG8", | |
b8074eba | 274 | .supply_name = "vcc11", |
2cd64ae3 CZ |
275 | .id = RK808_ID_LDO8, |
276 | .ops = &rk808_reg_ops, | |
277 | .type = REGULATOR_VOLTAGE, | |
278 | .n_voltages = 17, | |
279 | .linear_ranges = rk808_ldo_voltage_ranges, | |
280 | .n_linear_ranges = ARRAY_SIZE(rk808_ldo_voltage_ranges), | |
281 | .vsel_reg = RK808_LDO8_ON_VSEL_REG, | |
282 | .vsel_mask = RK808_LDO_VSEL_MASK, | |
283 | .enable_reg = RK808_LDO_EN_REG, | |
284 | .enable_mask = BIT(7), | |
285 | .owner = THIS_MODULE, | |
286 | }, { | |
287 | .name = "SWITCH_REG1", | |
b8074eba | 288 | .supply_name = "vcc8", |
2cd64ae3 CZ |
289 | .id = RK808_ID_SWITCH1, |
290 | .ops = &rk808_switch_ops, | |
291 | .type = REGULATOR_VOLTAGE, | |
292 | .enable_reg = RK808_DCDC_EN_REG, | |
293 | .enable_mask = BIT(5), | |
294 | .owner = THIS_MODULE, | |
295 | }, { | |
296 | .name = "SWITCH_REG2", | |
b8074eba | 297 | .supply_name = "vcc12", |
2cd64ae3 CZ |
298 | .id = RK808_ID_SWITCH2, |
299 | .ops = &rk808_switch_ops, | |
300 | .type = REGULATOR_VOLTAGE, | |
301 | .enable_reg = RK808_DCDC_EN_REG, | |
302 | .enable_mask = BIT(6), | |
303 | .owner = THIS_MODULE, | |
304 | }, | |
305 | }; | |
306 | ||
307 | static struct of_regulator_match rk808_reg_matches[] = { | |
308 | [RK808_ID_DCDC1] = { .name = "DCDC_REG1" }, | |
309 | [RK808_ID_DCDC2] = { .name = "DCDC_REG2" }, | |
310 | [RK808_ID_DCDC3] = { .name = "DCDC_REG3" }, | |
311 | [RK808_ID_DCDC4] = { .name = "DCDC_REG4" }, | |
312 | [RK808_ID_LDO1] = { .name = "LDO_REG1" }, | |
313 | [RK808_ID_LDO2] = { .name = "LDO_REG2" }, | |
314 | [RK808_ID_LDO3] = { .name = "LDO_REG3" }, | |
315 | [RK808_ID_LDO4] = { .name = "LDO_REG4" }, | |
316 | [RK808_ID_LDO5] = { .name = "LDO_REG5" }, | |
317 | [RK808_ID_LDO6] = { .name = "LDO_REG6" }, | |
318 | [RK808_ID_LDO7] = { .name = "LDO_REG7" }, | |
319 | [RK808_ID_LDO8] = { .name = "LDO_REG8" }, | |
320 | [RK808_ID_SWITCH1] = { .name = "SWITCH_REG1" }, | |
321 | [RK808_ID_SWITCH2] = { .name = "SWITCH_REG2" }, | |
322 | }; | |
323 | ||
2cd64ae3 CZ |
324 | static int rk808_regulator_probe(struct platform_device *pdev) |
325 | { | |
326 | struct rk808 *rk808 = dev_get_drvdata(pdev->dev.parent); | |
d76c333e | 327 | struct i2c_client *client = rk808->i2c; |
571a4010 | 328 | struct device_node *reg_np; |
462004f1 | 329 | struct regulator_config config = {}; |
2cd64ae3 | 330 | struct regulator_dev *rk808_rdev; |
571a4010 | 331 | int ret, i; |
2cd64ae3 | 332 | |
571a4010 CZ |
333 | reg_np = of_get_child_by_name(client->dev.of_node, "regulators"); |
334 | if (!reg_np) | |
335 | return -ENXIO; | |
2cd64ae3 | 336 | |
1ed3f8ce | 337 | ret = of_regulator_match(&pdev->dev, reg_np, rk808_reg_matches, |
571a4010 | 338 | RK808_NUM_REGULATORS); |
1ed3f8ce | 339 | of_node_put(reg_np); |
571a4010 | 340 | if (ret < 0) |
2cd64ae3 CZ |
341 | return ret; |
342 | ||
2cd64ae3 CZ |
343 | /* Instantiate the regulators */ |
344 | for (i = 0; i < RK808_NUM_REGULATORS; i++) { | |
571a4010 CZ |
345 | if (!rk808_reg_matches[i].init_data || |
346 | !rk808_reg_matches[i].of_node) | |
2cd64ae3 CZ |
347 | continue; |
348 | ||
d76c333e | 349 | config.dev = &client->dev; |
2cd64ae3 CZ |
350 | config.driver_data = rk808; |
351 | config.regmap = rk808->regmap; | |
571a4010 CZ |
352 | config.of_node = rk808_reg_matches[i].of_node; |
353 | config.init_data = rk808_reg_matches[i].init_data; | |
2cd64ae3 CZ |
354 | |
355 | rk808_rdev = devm_regulator_register(&pdev->dev, | |
356 | &rk808_reg[i], &config); | |
357 | if (IS_ERR(rk808_rdev)) { | |
d76c333e | 358 | dev_err(&client->dev, |
2cd64ae3 CZ |
359 | "failed to register %d regulator\n", i); |
360 | return PTR_ERR(rk808_rdev); | |
361 | } | |
2cd64ae3 | 362 | } |
571a4010 | 363 | |
2cd64ae3 CZ |
364 | return 0; |
365 | } | |
366 | ||
367 | static struct platform_driver rk808_regulator_driver = { | |
368 | .probe = rk808_regulator_probe, | |
369 | .driver = { | |
370 | .name = "rk808-regulator", | |
371 | .owner = THIS_MODULE, | |
372 | }, | |
373 | }; | |
374 | ||
375 | module_platform_driver(rk808_regulator_driver); | |
376 | ||
377 | MODULE_DESCRIPTION("regulator driver for the rk808 series PMICs"); | |
378 | MODULE_AUTHOR("Chris Zhong<zyw@rock-chips.com>"); | |
571a4010 | 379 | MODULE_AUTHOR("Zhang Qing<zhangqing@rock-chips.com>"); |
2cd64ae3 CZ |
380 | MODULE_LICENSE("GPL"); |
381 | MODULE_ALIAS("platform:rk808-regulator"); |