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ef4de050 | 1 | // SPDX-License-Identifier: GPL-2.0 |
f1e64f90 GL |
2 | /* |
3 | * AS3711 PMIC regulator driver, using DCDC Step Down and LDO supplies | |
4 | * | |
5 | * Copyright (C) 2012 Renesas Electronics Corporation | |
6 | * Author: Guennadi Liakhovetski, <g.liakhovetski@gmx.de> | |
f1e64f90 GL |
7 | */ |
8 | ||
9 | #include <linux/err.h> | |
10 | #include <linux/init.h> | |
11 | #include <linux/mfd/as3711.h> | |
12 | #include <linux/module.h> | |
416d6759 | 13 | #include <linux/of.h> |
f1e64f90 GL |
14 | #include <linux/platform_device.h> |
15 | #include <linux/regmap.h> | |
16 | #include <linux/regulator/driver.h> | |
416d6759 | 17 | #include <linux/regulator/of_regulator.h> |
f1e64f90 GL |
18 | #include <linux/slab.h> |
19 | ||
f1e64f90 GL |
20 | /* |
21 | * The regulator API supports 4 modes of operataion: FAST, NORMAL, IDLE and | |
22 | * STANDBY. We map them in the following way to AS3711 SD1-4 DCDC modes: | |
23 | * FAST: sdX_fast=1 | |
24 | * NORMAL: low_noise=1 | |
25 | * IDLE: low_noise=0 | |
26 | */ | |
27 | ||
28 | static int as3711_set_mode_sd(struct regulator_dev *rdev, unsigned int mode) | |
29 | { | |
30 | unsigned int fast_bit = rdev->desc->enable_mask, | |
31 | low_noise_bit = fast_bit << 4; | |
32 | u8 val; | |
33 | ||
34 | switch (mode) { | |
35 | case REGULATOR_MODE_FAST: | |
36 | val = fast_bit | low_noise_bit; | |
37 | break; | |
38 | case REGULATOR_MODE_NORMAL: | |
39 | val = low_noise_bit; | |
40 | break; | |
41 | case REGULATOR_MODE_IDLE: | |
42 | val = 0; | |
43 | break; | |
44 | default: | |
45 | return -EINVAL; | |
46 | } | |
47 | ||
48 | return regmap_update_bits(rdev->regmap, AS3711_SD_CONTROL_1, | |
49 | low_noise_bit | fast_bit, val); | |
50 | } | |
51 | ||
52 | static unsigned int as3711_get_mode_sd(struct regulator_dev *rdev) | |
53 | { | |
54 | unsigned int fast_bit = rdev->desc->enable_mask, | |
55 | low_noise_bit = fast_bit << 4, mask = fast_bit | low_noise_bit; | |
56 | unsigned int val; | |
57 | int ret = regmap_read(rdev->regmap, AS3711_SD_CONTROL_1, &val); | |
58 | ||
59 | if (ret < 0) | |
60 | return ret; | |
61 | ||
62 | if ((val & mask) == mask) | |
63 | return REGULATOR_MODE_FAST; | |
64 | ||
65 | if ((val & mask) == low_noise_bit) | |
66 | return REGULATOR_MODE_NORMAL; | |
67 | ||
68 | if (!(val & mask)) | |
69 | return REGULATOR_MODE_IDLE; | |
70 | ||
71 | return -EINVAL; | |
72 | } | |
73 | ||
1bacf463 | 74 | static const struct regulator_ops as3711_sd_ops = { |
f1e64f90 GL |
75 | .is_enabled = regulator_is_enabled_regmap, |
76 | .enable = regulator_enable_regmap, | |
77 | .disable = regulator_disable_regmap, | |
78 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
79 | .set_voltage_sel = regulator_set_voltage_sel_regmap, | |
9234c636 AL |
80 | .list_voltage = regulator_list_voltage_linear_range, |
81 | .map_voltage = regulator_map_voltage_linear_range, | |
f1e64f90 GL |
82 | .get_mode = as3711_get_mode_sd, |
83 | .set_mode = as3711_set_mode_sd, | |
84 | }; | |
85 | ||
1bacf463 | 86 | static const struct regulator_ops as3711_aldo_ops = { |
f1e64f90 GL |
87 | .is_enabled = regulator_is_enabled_regmap, |
88 | .enable = regulator_enable_regmap, | |
89 | .disable = regulator_disable_regmap, | |
90 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
91 | .set_voltage_sel = regulator_set_voltage_sel_regmap, | |
9234c636 AL |
92 | .list_voltage = regulator_list_voltage_linear_range, |
93 | .map_voltage = regulator_map_voltage_linear_range, | |
f1e64f90 GL |
94 | }; |
95 | ||
1bacf463 | 96 | static const struct regulator_ops as3711_dldo_ops = { |
f1e64f90 GL |
97 | .is_enabled = regulator_is_enabled_regmap, |
98 | .enable = regulator_enable_regmap, | |
99 | .disable = regulator_disable_regmap, | |
100 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
101 | .set_voltage_sel = regulator_set_voltage_sel_regmap, | |
9234c636 AL |
102 | .list_voltage = regulator_list_voltage_linear_range, |
103 | .map_voltage = regulator_map_voltage_linear_range, | |
104 | }; | |
105 | ||
60ab7f41 | 106 | static const struct linear_range as3711_sd_ranges[] = { |
8828bae4 AL |
107 | REGULATOR_LINEAR_RANGE(612500, 0x1, 0x40, 12500), |
108 | REGULATOR_LINEAR_RANGE(1425000, 0x41, 0x70, 25000), | |
109 | REGULATOR_LINEAR_RANGE(2650000, 0x71, 0x7f, 50000), | |
9234c636 AL |
110 | }; |
111 | ||
60ab7f41 | 112 | static const struct linear_range as3711_aldo_ranges[] = { |
8828bae4 AL |
113 | REGULATOR_LINEAR_RANGE(1200000, 0, 0xf, 50000), |
114 | REGULATOR_LINEAR_RANGE(1800000, 0x10, 0x1f, 100000), | |
9234c636 AL |
115 | }; |
116 | ||
60ab7f41 | 117 | static const struct linear_range as3711_dldo_ranges[] = { |
8828bae4 AL |
118 | REGULATOR_LINEAR_RANGE(900000, 0, 0x10, 50000), |
119 | REGULATOR_LINEAR_RANGE(1750000, 0x20, 0x3f, 50000), | |
f1e64f90 GL |
120 | }; |
121 | ||
192264e0 AL |
122 | #define AS3711_REG(_id, _en_reg, _en_bit, _vmask, _sfx) \ |
123 | [AS3711_REGULATOR_ ## _id] = { \ | |
192264e0 AL |
124 | .name = "as3711-regulator-" # _id, \ |
125 | .id = AS3711_REGULATOR_ ## _id, \ | |
126 | .n_voltages = (_vmask + 1), \ | |
127 | .ops = &as3711_ ## _sfx ## _ops, \ | |
128 | .type = REGULATOR_VOLTAGE, \ | |
129 | .owner = THIS_MODULE, \ | |
130 | .vsel_reg = AS3711_ ## _id ## _VOLTAGE, \ | |
131 | .vsel_mask = _vmask, \ | |
132 | .enable_reg = AS3711_ ## _en_reg, \ | |
133 | .enable_mask = BIT(_en_bit), \ | |
134 | .linear_ranges = as3711_ ## _sfx ## _ranges, \ | |
135 | .n_linear_ranges = ARRAY_SIZE(as3711_ ## _sfx ## _ranges), \ | |
f1e64f90 GL |
136 | } |
137 | ||
f668a1db | 138 | static const struct regulator_desc as3711_reg_desc[] = { |
192264e0 AL |
139 | AS3711_REG(SD_1, SD_CONTROL, 0, 0x7f, sd), |
140 | AS3711_REG(SD_2, SD_CONTROL, 1, 0x7f, sd), | |
141 | AS3711_REG(SD_3, SD_CONTROL, 2, 0x7f, sd), | |
142 | AS3711_REG(SD_4, SD_CONTROL, 3, 0x7f, sd), | |
143 | AS3711_REG(LDO_1, LDO_1_VOLTAGE, 7, 0x1f, aldo), | |
144 | AS3711_REG(LDO_2, LDO_2_VOLTAGE, 7, 0x1f, aldo), | |
145 | AS3711_REG(LDO_3, LDO_3_VOLTAGE, 7, 0x3f, dldo), | |
146 | AS3711_REG(LDO_4, LDO_4_VOLTAGE, 7, 0x3f, dldo), | |
147 | AS3711_REG(LDO_5, LDO_5_VOLTAGE, 7, 0x3f, dldo), | |
148 | AS3711_REG(LDO_6, LDO_6_VOLTAGE, 7, 0x3f, dldo), | |
149 | AS3711_REG(LDO_7, LDO_7_VOLTAGE, 7, 0x3f, dldo), | |
150 | AS3711_REG(LDO_8, LDO_8_VOLTAGE, 7, 0x3f, dldo), | |
f1e64f90 GL |
151 | /* StepUp output voltage depends on supplying regulator */ |
152 | }; | |
153 | ||
f668a1db | 154 | #define AS3711_REGULATOR_NUM ARRAY_SIZE(as3711_reg_desc) |
f1e64f90 | 155 | |
d6c7d731 AL |
156 | static struct of_regulator_match |
157 | as3711_regulator_matches[AS3711_REGULATOR_NUM] = { | |
158 | [AS3711_REGULATOR_SD_1] = { .name = "sd1" }, | |
159 | [AS3711_REGULATOR_SD_2] = { .name = "sd2" }, | |
160 | [AS3711_REGULATOR_SD_3] = { .name = "sd3" }, | |
161 | [AS3711_REGULATOR_SD_4] = { .name = "sd4" }, | |
162 | [AS3711_REGULATOR_LDO_1] = { .name = "ldo1" }, | |
163 | [AS3711_REGULATOR_LDO_2] = { .name = "ldo2" }, | |
164 | [AS3711_REGULATOR_LDO_3] = { .name = "ldo3" }, | |
165 | [AS3711_REGULATOR_LDO_4] = { .name = "ldo4" }, | |
166 | [AS3711_REGULATOR_LDO_5] = { .name = "ldo5" }, | |
167 | [AS3711_REGULATOR_LDO_6] = { .name = "ldo6" }, | |
168 | [AS3711_REGULATOR_LDO_7] = { .name = "ldo7" }, | |
169 | [AS3711_REGULATOR_LDO_8] = { .name = "ldo8" }, | |
416d6759 GL |
170 | }; |
171 | ||
172 | static int as3711_regulator_parse_dt(struct device *dev, | |
173 | struct device_node **of_node, const int count) | |
174 | { | |
175 | struct as3711_regulator_pdata *pdata = dev_get_platdata(dev); | |
176 | struct device_node *regulators = | |
eecb02c0 | 177 | of_get_child_by_name(dev->parent->of_node, "regulators"); |
d6c7d731 | 178 | struct of_regulator_match *match; |
416d6759 GL |
179 | int ret, i; |
180 | ||
181 | if (!regulators) { | |
182 | dev_err(dev, "regulator node not found\n"); | |
183 | return -ENODEV; | |
184 | } | |
185 | ||
d6c7d731 AL |
186 | ret = of_regulator_match(dev->parent, regulators, |
187 | as3711_regulator_matches, count); | |
416d6759 GL |
188 | of_node_put(regulators); |
189 | if (ret < 0) { | |
190 | dev_err(dev, "Error parsing regulator init data: %d\n", ret); | |
191 | return ret; | |
192 | } | |
193 | ||
d6c7d731 | 194 | for (i = 0, match = as3711_regulator_matches; i < count; i++, match++) |
416d6759 GL |
195 | if (match->of_node) { |
196 | pdata->init_data[i] = match->init_data; | |
197 | of_node[i] = match->of_node; | |
198 | } | |
199 | ||
200 | return 0; | |
201 | } | |
202 | ||
f1e64f90 GL |
203 | static int as3711_regulator_probe(struct platform_device *pdev) |
204 | { | |
205 | struct as3711_regulator_pdata *pdata = dev_get_platdata(&pdev->dev); | |
206 | struct as3711 *as3711 = dev_get_drvdata(pdev->dev.parent); | |
f1e64f90 | 207 | struct regulator_config config = {.dev = &pdev->dev,}; |
416d6759 | 208 | struct device_node *of_node[AS3711_REGULATOR_NUM] = {}; |
f1e64f90 | 209 | struct regulator_dev *rdev; |
f1e64f90 GL |
210 | int ret; |
211 | int id; | |
212 | ||
416d6759 GL |
213 | if (!pdata) { |
214 | dev_err(&pdev->dev, "No platform data...\n"); | |
215 | return -ENODEV; | |
216 | } | |
217 | ||
218 | if (pdev->dev.parent->of_node) { | |
219 | ret = as3711_regulator_parse_dt(&pdev->dev, of_node, AS3711_REGULATOR_NUM); | |
220 | if (ret < 0) { | |
221 | dev_err(&pdev->dev, "DT parsing failed: %d\n", ret); | |
222 | return ret; | |
223 | } | |
224 | } | |
f1e64f90 | 225 | |
f668a1db | 226 | for (id = 0; id < AS3711_REGULATOR_NUM; id++) { |
f7e9e52f | 227 | config.init_data = pdata->init_data[id]; |
f1e64f90 | 228 | config.regmap = as3711->regmap; |
416d6759 | 229 | config.of_node = of_node[id]; |
f1e64f90 | 230 | |
f668a1db AL |
231 | rdev = devm_regulator_register(&pdev->dev, &as3711_reg_desc[id], |
232 | &config); | |
f1e64f90 GL |
233 | if (IS_ERR(rdev)) { |
234 | dev_err(&pdev->dev, "Failed to register regulator %s\n", | |
f668a1db | 235 | as3711_reg_desc[id].name); |
27447c93 | 236 | return PTR_ERR(rdev); |
f1e64f90 | 237 | } |
f1e64f90 | 238 | } |
f668a1db | 239 | |
f1e64f90 | 240 | return 0; |
f1e64f90 GL |
241 | } |
242 | ||
243 | static struct platform_driver as3711_regulator_driver = { | |
244 | .driver = { | |
245 | .name = "as3711-regulator", | |
f1e64f90 GL |
246 | }, |
247 | .probe = as3711_regulator_probe, | |
f1e64f90 GL |
248 | }; |
249 | ||
250 | static int __init as3711_regulator_init(void) | |
251 | { | |
252 | return platform_driver_register(&as3711_regulator_driver); | |
253 | } | |
254 | subsys_initcall(as3711_regulator_init); | |
255 | ||
256 | static void __exit as3711_regulator_exit(void) | |
257 | { | |
258 | platform_driver_unregister(&as3711_regulator_driver); | |
259 | } | |
260 | module_exit(as3711_regulator_exit); | |
261 | ||
262 | MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>"); | |
263 | MODULE_DESCRIPTION("AS3711 regulator driver"); | |
264 | MODULE_ALIAS("platform:as3711-regulator"); | |
265 | MODULE_LICENSE("GPL v2"); |