2 * AS3711 PMIC regulator driver, using DCDC Step Down and LDO supplies
4 * Copyright (C) 2012 Renesas Electronics Corporation
5 * Author: Guennadi Liakhovetski, <g.liakhovetski@gmx.de>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the version 2 of the GNU General Public License as
9 * published by the Free Software Foundation
12 #include <linux/err.h>
13 #include <linux/init.h>
14 #include <linux/mfd/as3711.h>
15 #include <linux/module.h>
17 #include <linux/platform_device.h>
18 #include <linux/regmap.h>
19 #include <linux/regulator/driver.h>
20 #include <linux/regulator/of_regulator.h>
21 #include <linux/slab.h>
23 struct as3711_regulator_info {
24 struct regulator_desc desc;
28 struct as3711_regulator {
29 struct as3711_regulator_info *reg_info;
30 struct regulator_dev *rdev;
34 * The regulator API supports 4 modes of operataion: FAST, NORMAL, IDLE and
35 * STANDBY. We map them in the following way to AS3711 SD1-4 DCDC modes:
41 static int as3711_set_mode_sd(struct regulator_dev *rdev, unsigned int mode)
43 unsigned int fast_bit = rdev->desc->enable_mask,
44 low_noise_bit = fast_bit << 4;
48 case REGULATOR_MODE_FAST:
49 val = fast_bit | low_noise_bit;
51 case REGULATOR_MODE_NORMAL:
54 case REGULATOR_MODE_IDLE:
61 return regmap_update_bits(rdev->regmap, AS3711_SD_CONTROL_1,
62 low_noise_bit | fast_bit, val);
65 static unsigned int as3711_get_mode_sd(struct regulator_dev *rdev)
67 unsigned int fast_bit = rdev->desc->enable_mask,
68 low_noise_bit = fast_bit << 4, mask = fast_bit | low_noise_bit;
70 int ret = regmap_read(rdev->regmap, AS3711_SD_CONTROL_1, &val);
75 if ((val & mask) == mask)
76 return REGULATOR_MODE_FAST;
78 if ((val & mask) == low_noise_bit)
79 return REGULATOR_MODE_NORMAL;
82 return REGULATOR_MODE_IDLE;
87 static struct regulator_ops as3711_sd_ops = {
88 .is_enabled = regulator_is_enabled_regmap,
89 .enable = regulator_enable_regmap,
90 .disable = regulator_disable_regmap,
91 .get_voltage_sel = regulator_get_voltage_sel_regmap,
92 .set_voltage_sel = regulator_set_voltage_sel_regmap,
93 .list_voltage = regulator_list_voltage_linear_range,
94 .map_voltage = regulator_map_voltage_linear_range,
95 .get_mode = as3711_get_mode_sd,
96 .set_mode = as3711_set_mode_sd,
99 static struct regulator_ops as3711_aldo_ops = {
100 .is_enabled = regulator_is_enabled_regmap,
101 .enable = regulator_enable_regmap,
102 .disable = regulator_disable_regmap,
103 .get_voltage_sel = regulator_get_voltage_sel_regmap,
104 .set_voltage_sel = regulator_set_voltage_sel_regmap,
105 .list_voltage = regulator_list_voltage_linear_range,
106 .map_voltage = regulator_map_voltage_linear_range,
109 static struct regulator_ops as3711_dldo_ops = {
110 .is_enabled = regulator_is_enabled_regmap,
111 .enable = regulator_enable_regmap,
112 .disable = regulator_disable_regmap,
113 .get_voltage_sel = regulator_get_voltage_sel_regmap,
114 .set_voltage_sel = regulator_set_voltage_sel_regmap,
115 .list_voltage = regulator_list_voltage_linear_range,
116 .map_voltage = regulator_map_voltage_linear_range,
119 static const struct regulator_linear_range as3711_sd_ranges[] = {
120 REGULATOR_LINEAR_RANGE(612500, 0x1, 0x40, 12500),
121 REGULATOR_LINEAR_RANGE(1425000, 0x41, 0x70, 25000),
122 REGULATOR_LINEAR_RANGE(2650000, 0x71, 0x7f, 50000),
125 static const struct regulator_linear_range as3711_aldo_ranges[] = {
126 REGULATOR_LINEAR_RANGE(1200000, 0, 0xf, 50000),
127 REGULATOR_LINEAR_RANGE(1800000, 0x10, 0x1f, 100000),
130 static const struct regulator_linear_range as3711_dldo_ranges[] = {
131 REGULATOR_LINEAR_RANGE(900000, 0, 0x10, 50000),
132 REGULATOR_LINEAR_RANGE(1750000, 0x20, 0x3f, 50000),
135 #define AS3711_REG(_id, _en_reg, _en_bit, _vmask, _vshift, _min_uV, _max_uV, _sfx) \
136 [AS3711_REGULATOR_ ## _id] = { \
138 .name = "as3711-regulator-" # _id, \
139 .id = AS3711_REGULATOR_ ## _id, \
140 .n_voltages = (_vmask + 1), \
141 .ops = &as3711_ ## _sfx ## _ops, \
142 .type = REGULATOR_VOLTAGE, \
143 .owner = THIS_MODULE, \
144 .vsel_reg = AS3711_ ## _id ## _VOLTAGE, \
145 .vsel_mask = _vmask << _vshift, \
146 .enable_reg = AS3711_ ## _en_reg, \
147 .enable_mask = BIT(_en_bit), \
149 .linear_ranges = as3711_ ## _sfx ## _ranges, \
150 .n_linear_ranges = ARRAY_SIZE(as3711_ ## _sfx ## _ranges), \
155 static struct as3711_regulator_info as3711_reg_info[] = {
156 AS3711_REG(SD_1, SD_CONTROL, 0, 0x7f, 0, 612500, 3350000, sd),
157 AS3711_REG(SD_2, SD_CONTROL, 1, 0x7f, 0, 612500, 3350000, sd),
158 AS3711_REG(SD_3, SD_CONTROL, 2, 0x7f, 0, 612500, 3350000, sd),
159 AS3711_REG(SD_4, SD_CONTROL, 3, 0x7f, 0, 612500, 3350000, sd),
160 AS3711_REG(LDO_1, LDO_1_VOLTAGE, 7, 0x1f, 0, 1200000, 3300000, aldo),
161 AS3711_REG(LDO_2, LDO_2_VOLTAGE, 7, 0x1f, 0, 1200000, 3300000, aldo),
162 AS3711_REG(LDO_3, LDO_3_VOLTAGE, 7, 0x3f, 0, 900000, 3300000, dldo),
163 AS3711_REG(LDO_4, LDO_4_VOLTAGE, 7, 0x3f, 0, 900000, 3300000, dldo),
164 AS3711_REG(LDO_5, LDO_5_VOLTAGE, 7, 0x3f, 0, 900000, 3300000, dldo),
165 AS3711_REG(LDO_6, LDO_6_VOLTAGE, 7, 0x3f, 0, 900000, 3300000, dldo),
166 AS3711_REG(LDO_7, LDO_7_VOLTAGE, 7, 0x3f, 0, 900000, 3300000, dldo),
167 AS3711_REG(LDO_8, LDO_8_VOLTAGE, 7, 0x3f, 0, 900000, 3300000, dldo),
168 /* StepUp output voltage depends on supplying regulator */
171 #define AS3711_REGULATOR_NUM ARRAY_SIZE(as3711_reg_info)
173 static struct of_regulator_match
174 as3711_regulator_matches[AS3711_REGULATOR_NUM] = {
175 [AS3711_REGULATOR_SD_1] = { .name = "sd1" },
176 [AS3711_REGULATOR_SD_2] = { .name = "sd2" },
177 [AS3711_REGULATOR_SD_3] = { .name = "sd3" },
178 [AS3711_REGULATOR_SD_4] = { .name = "sd4" },
179 [AS3711_REGULATOR_LDO_1] = { .name = "ldo1" },
180 [AS3711_REGULATOR_LDO_2] = { .name = "ldo2" },
181 [AS3711_REGULATOR_LDO_3] = { .name = "ldo3" },
182 [AS3711_REGULATOR_LDO_4] = { .name = "ldo4" },
183 [AS3711_REGULATOR_LDO_5] = { .name = "ldo5" },
184 [AS3711_REGULATOR_LDO_6] = { .name = "ldo6" },
185 [AS3711_REGULATOR_LDO_7] = { .name = "ldo7" },
186 [AS3711_REGULATOR_LDO_8] = { .name = "ldo8" },
189 static int as3711_regulator_parse_dt(struct device *dev,
190 struct device_node **of_node, const int count)
192 struct as3711_regulator_pdata *pdata = dev_get_platdata(dev);
193 struct device_node *regulators =
194 of_find_node_by_name(dev->parent->of_node, "regulators");
195 struct of_regulator_match *match;
199 dev_err(dev, "regulator node not found\n");
203 ret = of_regulator_match(dev->parent, regulators,
204 as3711_regulator_matches, count);
205 of_node_put(regulators);
207 dev_err(dev, "Error parsing regulator init data: %d\n", ret);
211 for (i = 0, match = as3711_regulator_matches; i < count; i++, match++)
212 if (match->of_node) {
213 pdata->init_data[i] = match->init_data;
214 of_node[i] = match->of_node;
220 static int as3711_regulator_probe(struct platform_device *pdev)
222 struct as3711_regulator_pdata *pdata = dev_get_platdata(&pdev->dev);
223 struct as3711 *as3711 = dev_get_drvdata(pdev->dev.parent);
224 struct regulator_init_data *reg_data;
225 struct regulator_config config = {.dev = &pdev->dev,};
226 struct as3711_regulator *reg = NULL;
227 struct as3711_regulator *regs;
228 struct device_node *of_node[AS3711_REGULATOR_NUM] = {};
229 struct regulator_dev *rdev;
230 struct as3711_regulator_info *ri;
235 dev_err(&pdev->dev, "No platform data...\n");
239 if (pdev->dev.parent->of_node) {
240 ret = as3711_regulator_parse_dt(&pdev->dev, of_node, AS3711_REGULATOR_NUM);
242 dev_err(&pdev->dev, "DT parsing failed: %d\n", ret);
247 regs = devm_kzalloc(&pdev->dev, AS3711_REGULATOR_NUM *
248 sizeof(struct as3711_regulator), GFP_KERNEL);
250 dev_err(&pdev->dev, "Memory allocation failed exiting..\n");
254 for (id = 0, ri = as3711_reg_info; id < AS3711_REGULATOR_NUM; ++id, ri++) {
255 reg_data = pdata->init_data[id];
257 /* No need to register if there is no regulator data */
264 config.init_data = reg_data;
265 config.driver_data = reg;
266 config.regmap = as3711->regmap;
267 config.of_node = of_node[id];
269 rdev = devm_regulator_register(&pdev->dev, &ri->desc, &config);
271 dev_err(&pdev->dev, "Failed to register regulator %s\n",
273 return PTR_ERR(rdev);
277 platform_set_drvdata(pdev, regs);
281 static struct platform_driver as3711_regulator_driver = {
283 .name = "as3711-regulator",
284 .owner = THIS_MODULE,
286 .probe = as3711_regulator_probe,
289 static int __init as3711_regulator_init(void)
291 return platform_driver_register(&as3711_regulator_driver);
293 subsys_initcall(as3711_regulator_init);
295 static void __exit as3711_regulator_exit(void)
297 platform_driver_unregister(&as3711_regulator_driver);
299 module_exit(as3711_regulator_exit);
301 MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>");
302 MODULE_DESCRIPTION("AS3711 regulator driver");
303 MODULE_ALIAS("platform:as3711-regulator");
304 MODULE_LICENSE("GPL v2");