2 * Regulator driver for Rockchip RK818
4 * Copyright (c) 2016, Fuzhou Rockchip Electronics Co., Ltd
6 * Author: xsf <xsf@rock-chips.com>
7 * Author: Zhang Qing <zhangqing@rock-chips.com>
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.
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
19 #include <linux/delay.h>
20 #include <linux/gpio.h>
21 #include <linux/i2c.h>
22 #include <linux/module.h>
23 #include <linux/of_device.h>
24 #include <linux/of_gpio.h>
25 #include <linux/mfd/rk808.h>
26 #include <linux/regulator/driver.h>
27 #include <linux/regulator/of_regulator.h>
28 #include <linux/gpio/consumer.h>
30 /* Field Definitions */
31 #define RK818_BUCK_VSEL_MASK 0x3f
32 #define RK818_BUCK4_VSEL_MASK 0x1f
33 #define RK818_LDO_VSEL_MASK 0x1f
34 #define RK818_LDO3_VSEL_MASK 0x0f
36 /* Ramp rate definitions for buck1 / buck2 only */
37 #define RK818_RAMP_RATE_OFFSET 3
38 #define RK818_RAMP_RATE_MASK (3 << RK818_RAMP_RATE_OFFSET)
39 #define RK818_RAMP_RATE_2MV_PER_US (0 << RK818_RAMP_RATE_OFFSET)
40 #define RK818_RAMP_RATE_4MV_PER_US (1 << RK818_RAMP_RATE_OFFSET)
41 #define RK818_RAMP_RATE_6MV_PER_US (2 << RK818_RAMP_RATE_OFFSET)
42 #define RK818_RAMP_RATE_10MV_PER_US (3 << RK818_RAMP_RATE_OFFSET)
44 /* Offset from XXX_ON_VSEL to XXX_SLP_VSEL */
45 #define RK818_SLP_REG_OFFSET 1
47 /* Offset from XXX_EN_REG to SLEEP_SET_OFF_XXX */
48 #define RK818_SLP_SET_OFF_REG_OFFSET 2
50 /* max steps for increase voltage of Buck1/2, equal 100mv*/
51 #define MAX_STEPS_ONE_TIME 8
53 static const int rk818_buck_config_regs[] = {
54 RK818_BUCK1_CONFIG_REG,
55 RK818_BUCK2_CONFIG_REG,
56 RK818_BUCK3_CONFIG_REG,
57 RK818_BUCK4_CONFIG_REG,
60 static const struct regulator_linear_range rk818_buck_voltage_ranges[] = {
61 REGULATOR_LINEAR_RANGE(712500, 0, 63, 12500),
64 static const struct regulator_linear_range rk818_buck4_voltage_ranges[] = {
65 REGULATOR_LINEAR_RANGE(1800000, 0, 15, 100000),
68 static const struct regulator_linear_range rk818_ldo_voltage_ranges[] = {
69 REGULATOR_LINEAR_RANGE(1800000, 0, 16, 100000),
72 static const struct regulator_linear_range rk818_ldo3_voltage_ranges[] = {
73 REGULATOR_LINEAR_RANGE(800000, 0, 13, 100000),
74 REGULATOR_LINEAR_RANGE(2500000, 15, 15, 0),
77 static const struct regulator_linear_range rk818_ldo6_voltage_ranges[] = {
78 REGULATOR_LINEAR_RANGE(800000, 0, 17, 100000),
81 static int rk818_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay)
83 unsigned int ramp_value = RK818_RAMP_RATE_10MV_PER_US;
84 unsigned int reg = rk818_buck_config_regs[rdev->desc->id -
89 ramp_value = RK818_RAMP_RATE_2MV_PER_US;
92 ramp_value = RK818_RAMP_RATE_4MV_PER_US;
95 ramp_value = RK818_RAMP_RATE_6MV_PER_US;
100 pr_warn("%s ramp_delay: %d not supported, setting 10000\n",
101 rdev->desc->name, ramp_delay);
104 return regmap_update_bits(rdev->regmap, reg,
105 RK818_RAMP_RATE_MASK, ramp_value);
108 static int rk818_set_suspend_voltage(struct regulator_dev *rdev, int uv)
111 int sel = regulator_map_voltage_linear_range(rdev, uv, uv);
116 reg = rdev->desc->vsel_reg + RK818_SLP_REG_OFFSET;
118 return regmap_update_bits(rdev->regmap, reg,
119 rdev->desc->vsel_mask,
123 static int rk818_set_suspend_enable(struct regulator_dev *rdev)
127 reg = rdev->desc->enable_reg + RK818_SLP_SET_OFF_REG_OFFSET;
129 return regmap_update_bits(rdev->regmap, reg,
130 rdev->desc->enable_mask,
134 static int rk818_set_suspend_disable(struct regulator_dev *rdev)
138 reg = rdev->desc->enable_reg + RK818_SLP_SET_OFF_REG_OFFSET;
140 return regmap_update_bits(rdev->regmap, reg,
141 rdev->desc->enable_mask,
142 rdev->desc->enable_mask);
145 static struct regulator_ops rk818_buck1_2_ops = {
146 .list_voltage = regulator_list_voltage_linear_range,
147 .map_voltage = regulator_map_voltage_linear_range,
148 .get_voltage_sel = regulator_get_voltage_sel_regmap,
149 .set_voltage_sel = regulator_set_voltage_sel_regmap,
150 .set_voltage_time_sel = regulator_set_voltage_time_sel,
151 .enable = regulator_enable_regmap,
152 .disable = regulator_disable_regmap,
153 .is_enabled = regulator_is_enabled_regmap,
154 .set_ramp_delay = rk818_set_ramp_delay,
155 .set_suspend_voltage = rk818_set_suspend_voltage,
156 .set_suspend_enable = rk818_set_suspend_enable,
157 .set_suspend_disable = rk818_set_suspend_disable,
160 static struct regulator_ops rk818_reg_ops = {
161 .list_voltage = regulator_list_voltage_linear_range,
162 .map_voltage = regulator_map_voltage_linear_range,
163 .get_voltage_sel = regulator_get_voltage_sel_regmap,
164 .set_voltage_sel = regulator_set_voltage_sel_regmap,
165 .enable = regulator_enable_regmap,
166 .disable = regulator_disable_regmap,
167 .is_enabled = regulator_is_enabled_regmap,
168 .set_suspend_voltage = rk818_set_suspend_voltage,
169 .set_suspend_enable = rk818_set_suspend_enable,
170 .set_suspend_disable = rk818_set_suspend_disable,
173 static struct regulator_ops rk818_switch_ops = {
174 .enable = regulator_enable_regmap,
175 .disable = regulator_disable_regmap,
176 .is_enabled = regulator_is_enabled_regmap,
177 .set_suspend_enable = rk818_set_suspend_enable,
178 .set_suspend_disable = rk818_set_suspend_disable,
181 static const struct regulator_desc rk818_reg[] = {
184 .supply_name = "vcc1",
185 .id = RK818_ID_DCDC1,
186 .ops = &rk818_buck1_2_ops,
187 .type = REGULATOR_VOLTAGE,
189 .linear_ranges = rk818_buck_voltage_ranges,
190 .n_linear_ranges = ARRAY_SIZE(rk818_buck_voltage_ranges),
191 .vsel_reg = RK818_BUCK1_ON_VSEL_REG,
192 .vsel_mask = RK818_BUCK_VSEL_MASK,
193 .enable_reg = RK818_DCDC_EN_REG,
194 .enable_mask = BIT(0),
195 .owner = THIS_MODULE,
198 .supply_name = "vcc2",
199 .id = RK818_ID_DCDC2,
200 .ops = &rk818_buck1_2_ops,
201 .type = REGULATOR_VOLTAGE,
203 .linear_ranges = rk818_buck_voltage_ranges,
204 .n_linear_ranges = ARRAY_SIZE(rk818_buck_voltage_ranges),
205 .vsel_reg = RK818_BUCK2_ON_VSEL_REG,
206 .vsel_mask = RK818_BUCK_VSEL_MASK,
207 .enable_reg = RK818_DCDC_EN_REG,
208 .enable_mask = BIT(1),
209 .owner = THIS_MODULE,
212 .supply_name = "vcc3",
213 .id = RK818_ID_DCDC3,
214 .ops = &rk818_switch_ops,
215 .type = REGULATOR_VOLTAGE,
217 .enable_reg = RK818_DCDC_EN_REG,
218 .enable_mask = BIT(2),
219 .owner = THIS_MODULE,
222 .supply_name = "vcc4",
223 .id = RK818_ID_DCDC4,
224 .ops = &rk818_reg_ops,
225 .type = REGULATOR_VOLTAGE,
227 .linear_ranges = rk818_buck4_voltage_ranges,
228 .n_linear_ranges = ARRAY_SIZE(rk818_buck4_voltage_ranges),
229 .vsel_reg = RK818_BUCK4_ON_VSEL_REG,
230 .vsel_mask = RK818_BUCK4_VSEL_MASK,
231 .enable_reg = RK818_DCDC_EN_REG,
232 .enable_mask = BIT(3),
233 .owner = THIS_MODULE,
236 .supply_name = "vcc6",
238 .ops = &rk818_reg_ops,
239 .type = REGULATOR_VOLTAGE,
241 .linear_ranges = rk818_ldo_voltage_ranges,
242 .n_linear_ranges = ARRAY_SIZE(rk818_ldo_voltage_ranges),
243 .vsel_reg = RK818_LDO1_ON_VSEL_REG,
244 .vsel_mask = RK818_LDO_VSEL_MASK,
245 .enable_reg = RK818_LDO_EN_REG,
246 .enable_mask = BIT(0),
248 .owner = THIS_MODULE,
251 .supply_name = "vcc6",
253 .ops = &rk818_reg_ops,
254 .type = REGULATOR_VOLTAGE,
256 .linear_ranges = rk818_ldo_voltage_ranges,
257 .n_linear_ranges = ARRAY_SIZE(rk818_ldo_voltage_ranges),
258 .vsel_reg = RK818_LDO2_ON_VSEL_REG,
259 .vsel_mask = RK818_LDO_VSEL_MASK,
260 .enable_reg = RK818_LDO_EN_REG,
261 .enable_mask = BIT(1),
263 .owner = THIS_MODULE,
266 .supply_name = "vcc7",
268 .ops = &rk818_reg_ops,
269 .type = REGULATOR_VOLTAGE,
271 .linear_ranges = rk818_ldo3_voltage_ranges,
272 .n_linear_ranges = ARRAY_SIZE(rk818_ldo3_voltage_ranges),
273 .vsel_reg = RK818_LDO3_ON_VSEL_REG,
274 .vsel_mask = RK818_LDO3_VSEL_MASK,
275 .enable_reg = RK818_LDO_EN_REG,
276 .enable_mask = BIT(2),
278 .owner = THIS_MODULE,
281 .supply_name = "vcc8",
283 .ops = &rk818_reg_ops,
284 .type = REGULATOR_VOLTAGE,
286 .linear_ranges = rk818_ldo_voltage_ranges,
287 .n_linear_ranges = ARRAY_SIZE(rk818_ldo_voltage_ranges),
288 .vsel_reg = RK818_LDO4_ON_VSEL_REG,
289 .vsel_mask = RK818_LDO_VSEL_MASK,
290 .enable_reg = RK818_LDO_EN_REG,
291 .enable_mask = BIT(3),
293 .owner = THIS_MODULE,
296 .supply_name = "vcc7",
298 .ops = &rk818_reg_ops,
299 .type = REGULATOR_VOLTAGE,
301 .linear_ranges = rk818_ldo_voltage_ranges,
302 .n_linear_ranges = ARRAY_SIZE(rk818_ldo_voltage_ranges),
303 .vsel_reg = RK818_LDO5_ON_VSEL_REG,
304 .vsel_mask = RK818_LDO_VSEL_MASK,
305 .enable_reg = RK818_LDO_EN_REG,
306 .enable_mask = BIT(4),
308 .owner = THIS_MODULE,
311 .supply_name = "vcc8",
313 .ops = &rk818_reg_ops,
314 .type = REGULATOR_VOLTAGE,
316 .linear_ranges = rk818_ldo6_voltage_ranges,
317 .n_linear_ranges = ARRAY_SIZE(rk818_ldo6_voltage_ranges),
318 .vsel_reg = RK818_LDO6_ON_VSEL_REG,
319 .vsel_mask = RK818_LDO_VSEL_MASK,
320 .enable_reg = RK818_LDO_EN_REG,
321 .enable_mask = BIT(5),
323 .owner = THIS_MODULE,
326 .supply_name = "vcc7",
328 .ops = &rk818_reg_ops,
329 .type = REGULATOR_VOLTAGE,
331 .linear_ranges = rk818_ldo6_voltage_ranges,
332 .n_linear_ranges = ARRAY_SIZE(rk818_ldo6_voltage_ranges),
333 .vsel_reg = RK818_LDO7_ON_VSEL_REG,
334 .vsel_mask = RK818_LDO_VSEL_MASK,
335 .enable_reg = RK818_LDO_EN_REG,
336 .enable_mask = BIT(6),
338 .owner = THIS_MODULE,
341 .supply_name = "vcc8",
343 .ops = &rk818_reg_ops,
344 .type = REGULATOR_VOLTAGE,
346 .linear_ranges = rk818_ldo_voltage_ranges,
347 .n_linear_ranges = ARRAY_SIZE(rk818_ldo_voltage_ranges),
348 .vsel_reg = RK818_LDO8_ON_VSEL_REG,
349 .vsel_mask = RK818_LDO_VSEL_MASK,
350 .enable_reg = RK818_LDO_EN_REG,
351 .enable_mask = BIT(7),
353 .owner = THIS_MODULE,
356 .supply_name = "vcc9",
358 .ops = &rk818_reg_ops,
359 .type = REGULATOR_VOLTAGE,
361 .linear_ranges = rk818_ldo_voltage_ranges,
362 .n_linear_ranges = ARRAY_SIZE(rk818_ldo_voltage_ranges),
363 .vsel_reg = RK818_BOOST_LDO9_ON_VSEL_REG,
364 .vsel_mask = RK818_LDO_VSEL_MASK,
365 .enable_reg = RK818_DCDC_EN_REG,
366 .enable_mask = BIT(5),
368 .owner = THIS_MODULE,
370 .name = "SWITCH_REG",
371 .supply_name = "vcc9",
372 .id = RK818_ID_SWITCH,
373 .ops = &rk818_switch_ops,
374 .type = REGULATOR_VOLTAGE,
375 .enable_reg = RK818_DCDC_EN_REG,
376 .enable_mask = BIT(6),
377 .owner = THIS_MODULE,
381 static struct of_regulator_match rk818_reg_matches[] = {
382 [RK818_ID_DCDC1] = { .name = "DCDC_REG1" },
383 [RK818_ID_DCDC2] = { .name = "DCDC_REG2" },
384 [RK818_ID_DCDC3] = { .name = "DCDC_REG3" },
385 [RK818_ID_DCDC4] = { .name = "DCDC_REG4" },
386 [RK818_ID_LDO1] = { .name = "LDO_REG1" },
387 [RK818_ID_LDO2] = { .name = "LDO_REG2" },
388 [RK818_ID_LDO3] = { .name = "LDO_REG3" },
389 [RK818_ID_LDO4] = { .name = "LDO_REG4" },
390 [RK818_ID_LDO5] = { .name = "LDO_REG5" },
391 [RK818_ID_LDO6] = { .name = "LDO_REG6" },
392 [RK818_ID_LDO7] = { .name = "LDO_REG7" },
393 [RK818_ID_LDO8] = { .name = "LDO_REG8" },
394 [RK818_ID_LDO9] = { .name = "LDO_REG9" },
395 [RK818_ID_SWITCH] = { .name = "SWITCH_REG" },
398 static int rk818_regulator_dt_parse_pdata(struct device *dev,
399 struct device *client_dev,
402 struct device_node *np;
405 np = of_get_child_by_name(client_dev->of_node, "regulators");
409 ret = of_regulator_match(dev, np, rk818_reg_matches,
410 RK818_NUM_REGULATORS);
416 static int rk818_regulator_probe(struct platform_device *pdev)
418 struct rk808 *rk818 = dev_get_drvdata(pdev->dev.parent);
419 struct i2c_client *client = rk818->i2c;
420 struct regulator_config config = {};
421 struct regulator_dev *rk818_rdev;
424 ret = rk818_regulator_dt_parse_pdata(&pdev->dev, &client->dev,
429 /* Instantiate the regulators */
430 for (i = 0; i < RK818_NUM_REGULATORS; i++) {
431 if (!rk818_reg_matches[i].init_data ||
432 !rk818_reg_matches[i].of_node)
435 config.dev = &client->dev;
436 config.regmap = rk818->regmap;
437 config.of_node = rk818_reg_matches[i].of_node;
438 config.init_data = rk818_reg_matches[i].init_data;
440 rk818_rdev = devm_regulator_register(&pdev->dev,
441 &rk818_reg[i], &config);
442 if (IS_ERR(rk818_rdev)) {
443 dev_err(&client->dev,
444 "failed to register %d regulator\n", i);
445 return PTR_ERR(rk818_rdev);
452 static struct platform_driver rk818_regulator_driver = {
453 .probe = rk818_regulator_probe,
455 .name = "rk818-regulator",
456 .owner = THIS_MODULE,
460 module_platform_driver(rk818_regulator_driver);
462 MODULE_DESCRIPTION("regulator driver for the rk818 series PMICs");
463 MODULE_AUTHOR("xsf<xsf@rock-chips.com>");
464 MODULE_AUTHOR("Zhang Qing<zhangqing@rock-chips.com>");
465 MODULE_LICENSE("GPL");
466 MODULE_ALIAS("platform:rk818-regulator");