1 /*
2 * Copyright (c) 2017 MediaTek Inc.
3 * Author: Chenglin Xu <chenglin.xu@mediatek.com>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 */
14
15 #include <linux/module.h>
16 #include <linux/of.h>
17 #include <linux/platform_device.h>
18 #include <linux/regmap.h>
19 #include <linux/regulator/driver.h>
20 #include <linux/regulator/machine.h>
21 #include <linux/regulator/mt6380-regulator.h>
22 #include <linux/regulator/of_regulator.h>
23
24 /* PMIC Registers */
25 #define MT6380_ALDO_CON_0 0x0000
26 #define MT6380_BTLDO_CON_0 0x0004
27 #define MT6380_COMP_CON_0 0x0008
28 #define MT6380_CPUBUCK_CON_0 0x000C
29 #define MT6380_CPUBUCK_CON_1 0x0010
30 #define MT6380_CPUBUCK_CON_2 0x0014
31 #define MT6380_DDRLDO_CON_0 0x0018
32 #define MT6380_MLDO_CON_0 0x001C
33 #define MT6380_PALDO_CON_0 0x0020
34 #define MT6380_PHYLDO_CON_0 0x0024
35 #define MT6380_SIDO_CON_0 0x0028
36 #define MT6380_SIDO_CON_1 0x002C
37 #define MT6380_SIDO_CON_2 0x0030
38 #define MT6380_SLDO_CON_0 0x0034
39 #define MT6380_TLDO_CON_0 0x0038
40 #define MT6380_STARTUP_CON_0 0x003C
41 #define MT6380_STARTUP_CON_1 0x0040
42 #define MT6380_SMPS_TOP_CON_0 0x0044
43 #define MT6380_SMPS_TOP_CON_1 0x0048
44 #define MT6380_ANA_CTRL_0 0x0050
45 #define MT6380_ANA_CTRL_1 0x0054
46 #define MT6380_ANA_CTRL_2 0x0058
47 #define MT6380_ANA_CTRL_3 0x005C
48 #define MT6380_ANA_CTRL_4 0x0060
49 #define MT6380_SPK_CON9 0x0064
50 #define MT6380_SPK_CON11 0x0068
51 #define MT6380_SPK_CON12 0x006A
52 #define MT6380_CLK_CTRL 0x0070
53 #define MT6380_PINMUX_CTRL 0x0074
54 #define MT6380_IO_CTRL 0x0078
55 #define MT6380_SLP_MODE_CTRL_0 0x007C
56 #define MT6380_SLP_MODE_CTRL_1 0x0080
57 #define MT6380_SLP_MODE_CTRL_2 0x0084
58 #define MT6380_SLP_MODE_CTRL_3 0x0088
59 #define MT6380_SLP_MODE_CTRL_4 0x008C
60 #define MT6380_SLP_MODE_CTRL_5 0x0090
61 #define MT6380_SLP_MODE_CTRL_6 0x0094
62 #define MT6380_SLP_MODE_CTRL_7 0x0098
63 #define MT6380_SLP_MODE_CTRL_8 0x009C
64 #define MT6380_FCAL_CTRL_0 0x00A0
65 #define MT6380_FCAL_CTRL_1 0x00A4
66 #define MT6380_LDO_CTRL_0 0x00A8
67 #define MT6380_LDO_CTRL_1 0x00AC
68 #define MT6380_LDO_CTRL_2 0x00B0
69 #define MT6380_LDO_CTRL_3 0x00B4
70 #define MT6380_LDO_CTRL_4 0x00B8
71 #define MT6380_DEBUG_CTRL_0 0x00BC
72 #define MT6380_EFU_CTRL_0 0x0200
73 #define MT6380_EFU_CTRL_1 0x0201
74 #define MT6380_EFU_CTRL_2 0x0202
75 #define MT6380_EFU_CTRL_3 0x0203
76 #define MT6380_EFU_CTRL_4 0x0204
77 #define MT6380_EFU_CTRL_5 0x0205
78 #define MT6380_EFU_CTRL_6 0x0206
79 #define MT6380_EFU_CTRL_7 0x0207
80 #define MT6380_EFU_CTRL_8 0x0208
81
82 #define MT6380_REGULATOR_MODE_AUTO 0
83 #define MT6380_REGULATOR_MODE_FORCE_PWM 1
84
85 /*
86 * mt6380 regulators' information
87 *
88 * @desc: standard fields of regulator description
89 * @vselon_reg: Register sections for hardware control mode of bucks
90 * @modeset_reg: Register for controlling the buck/LDO control mode
91 * @modeset_mask: Mask for controlling the buck/LDO control mode
92 */
93 struct mt6380_regulator_info {
94 struct regulator_desc desc;
95 u32 vselon_reg;
96 u32 modeset_reg;
97 u32 modeset_mask;
98 };
99
100 #define MT6380_BUCK(match, vreg, min, max, step, volt_ranges, enreg, \
101 vosel, vosel_mask, enbit, voselon, _modeset_reg, \
102 _modeset_mask) \
103 [MT6380_ID_##vreg] = { \
104 .desc = { \
105 .name = #vreg, \
106 .of_match = of_match_ptr(match), \
107 .ops = &mt6380_volt_range_ops, \
108 .type = REGULATOR_VOLTAGE, \
109 .id = MT6380_ID_##vreg, \
110 .owner = THIS_MODULE, \
111 .n_voltages = ((max) - (min)) / (step) + 1, \
112 .linear_ranges = volt_ranges, \
113 .n_linear_ranges = ARRAY_SIZE(volt_ranges), \
114 .vsel_reg = vosel, \
115 .vsel_mask = vosel_mask, \
116 .enable_reg = enreg, \
117 .enable_mask = BIT(enbit), \
118 }, \
119 .vselon_reg = voselon, \
120 .modeset_reg = _modeset_reg, \
121 .modeset_mask = _modeset_mask, \
122 }
123
124 #define MT6380_LDO(match, vreg, ldo_volt_table, enreg, enbit, vosel, \
125 vosel_mask, _modeset_reg, _modeset_mask) \
126 [MT6380_ID_##vreg] = { \
127 .desc = { \
128 .name = #vreg, \
129 .of_match = of_match_ptr(match), \
130 .ops = &mt6380_volt_table_ops, \
131 .type = REGULATOR_VOLTAGE, \
132 .id = MT6380_ID_##vreg, \
133 .owner = THIS_MODULE, \
134 .n_voltages = ARRAY_SIZE(ldo_volt_table), \
135 .volt_table = ldo_volt_table, \
136 .vsel_reg = vosel, \
137 .vsel_mask = vosel_mask, \
138 .enable_reg = enreg, \
139 .enable_mask = BIT(enbit), \
140 }, \
141 .modeset_reg = _modeset_reg, \
142 .modeset_mask = _modeset_mask, \
143 }
144
145 #define MT6380_REG_FIXED(match, vreg, enreg, enbit, volt, \
146 _modeset_reg, _modeset_mask) \
147 [MT6380_ID_##vreg] = { \
148 .desc = { \
149 .name = #vreg, \
150 .of_match = of_match_ptr(match), \
151 .ops = &mt6380_volt_fixed_ops, \
152 .type = REGULATOR_VOLTAGE, \
153 .id = MT6380_ID_##vreg, \
154 .owner = THIS_MODULE, \
155 .n_voltages = 1, \
156 .enable_reg = enreg, \
157 .enable_mask = BIT(enbit), \
158 .min_uV = volt, \
159 }, \
160 .modeset_reg = _modeset_reg, \
161 .modeset_mask = _modeset_mask, \
162 }
163
164 static const struct regulator_linear_range buck_volt_range1[] = {
165 REGULATOR_LINEAR_RANGE(600000, 0, 0xfe, 6250),
166 };
167
168 static const struct regulator_linear_range buck_volt_range2[] = {
169 REGULATOR_LINEAR_RANGE(600000, 0, 0xfe, 6250),
170 };
171
172 static const struct regulator_linear_range buck_volt_range3[] = {
173 REGULATOR_LINEAR_RANGE(1200000, 0, 0x3c, 25000),
174 };
175
176 static const u32 ldo_volt_table1[] = {
177 1400000, 1350000, 1300000, 1250000, 1200000, 1150000, 1100000, 1050000,
178 };
179
180 static const u32 ldo_volt_table2[] = {
181 2200000, 3300000,
182 };
183
184 static const u32 ldo_volt_table3[] = {
185 1240000, 1390000, 1540000, 1840000,
186 };
187
188 static const u32 ldo_volt_table4[] = {
189 2200000, 3300000,
190 };
191
mt6380_regulator_set_mode(struct regulator_dev * rdev,unsigned int mode)192 static int mt6380_regulator_set_mode(struct regulator_dev *rdev,
193 unsigned int mode)
194 {
195 int ret, val = 0;
196 struct mt6380_regulator_info *info = rdev_get_drvdata(rdev);
197
198 switch (mode) {
199 case REGULATOR_MODE_NORMAL:
200 val = MT6380_REGULATOR_MODE_AUTO;
201 break;
202 case REGULATOR_MODE_FAST:
203 val = MT6380_REGULATOR_MODE_FORCE_PWM;
204 break;
205 default:
206 return -EINVAL;
207 }
208
209 val <<= ffs(info->modeset_mask) - 1;
210
211 ret = regmap_update_bits(rdev->regmap, info->modeset_reg,
212 info->modeset_mask, val);
213
214 return ret;
215 }
216
mt6380_regulator_get_mode(struct regulator_dev * rdev)217 static unsigned int mt6380_regulator_get_mode(struct regulator_dev *rdev)
218 {
219 unsigned int val;
220 unsigned int mode;
221 int ret;
222 struct mt6380_regulator_info *info = rdev_get_drvdata(rdev);
223
224 ret = regmap_read(rdev->regmap, info->modeset_reg, &val);
225 if (ret < 0)
226 return ret;
227
228 val &= info->modeset_mask;
229 val >>= ffs(info->modeset_mask) - 1;
230
231 switch (val) {
232 case MT6380_REGULATOR_MODE_AUTO:
233 mode = REGULATOR_MODE_NORMAL;
234 break;
235 case MT6380_REGULATOR_MODE_FORCE_PWM:
236 mode = REGULATOR_MODE_FAST;
237 break;
238 default:
239 return -EINVAL;
240 }
241
242 return mode;
243 }
244
245 static const struct regulator_ops mt6380_volt_range_ops = {
246 .list_voltage = regulator_list_voltage_linear_range,
247 .map_voltage = regulator_map_voltage_linear_range,
248 .set_voltage_sel = regulator_set_voltage_sel_regmap,
249 .get_voltage_sel = regulator_get_voltage_sel_regmap,
250 .set_voltage_time_sel = regulator_set_voltage_time_sel,
251 .enable = regulator_enable_regmap,
252 .disable = regulator_disable_regmap,
253 .is_enabled = regulator_is_enabled_regmap,
254 .set_mode = mt6380_regulator_set_mode,
255 .get_mode = mt6380_regulator_get_mode,
256 };
257
258 static const struct regulator_ops mt6380_volt_table_ops = {
259 .list_voltage = regulator_list_voltage_table,
260 .map_voltage = regulator_map_voltage_iterate,
261 .set_voltage_sel = regulator_set_voltage_sel_regmap,
262 .get_voltage_sel = regulator_get_voltage_sel_regmap,
263 .set_voltage_time_sel = regulator_set_voltage_time_sel,
264 .enable = regulator_enable_regmap,
265 .disable = regulator_disable_regmap,
266 .is_enabled = regulator_is_enabled_regmap,
267 .set_mode = mt6380_regulator_set_mode,
268 .get_mode = mt6380_regulator_get_mode,
269 };
270
271 static const struct regulator_ops mt6380_volt_fixed_ops = {
272 .list_voltage = regulator_list_voltage_linear,
273 .enable = regulator_enable_regmap,
274 .disable = regulator_disable_regmap,
275 .is_enabled = regulator_is_enabled_regmap,
276 .set_mode = mt6380_regulator_set_mode,
277 .get_mode = mt6380_regulator_get_mode,
278 };
279
280 /* The array is indexed by id(MT6380_ID_XXX) */
281 static struct mt6380_regulator_info mt6380_regulators[] = {
282 MT6380_BUCK("buck-vcore1", VCPU, 600000, 1393750, 6250,
283 buck_volt_range1, MT6380_ANA_CTRL_3, MT6380_ANA_CTRL_1,
284 0xfe, 3, MT6380_ANA_CTRL_1,
285 MT6380_CPUBUCK_CON_0, 0x8000000),
286 MT6380_BUCK("buck-vcore", VCORE, 600000, 1393750, 6250,
287 buck_volt_range2, MT6380_ANA_CTRL_3, MT6380_ANA_CTRL_2,
288 0xfe, 2, MT6380_ANA_CTRL_2, MT6380_SIDO_CON_0, 0x1000000),
289 MT6380_BUCK("buck-vrf", VRF, 1200000, 1575000, 25000,
290 buck_volt_range3, MT6380_ANA_CTRL_3, MT6380_SIDO_CON_0,
291 0x78, 1, MT6380_SIDO_CON_0, MT6380_SIDO_CON_0, 0x8000),
292 MT6380_LDO("ldo-vm", VMLDO, ldo_volt_table1, MT6380_LDO_CTRL_0,
293 1, MT6380_MLDO_CON_0, 0xE000, MT6380_ANA_CTRL_1, 0x4000000),
294 MT6380_LDO("ldo-va", VALDO, ldo_volt_table2, MT6380_LDO_CTRL_0,
295 2, MT6380_ALDO_CON_0, 0x400, MT6380_ALDO_CON_0, 0x20),
296 MT6380_REG_FIXED("ldo-vphy", VPHYLDO, MT6380_LDO_CTRL_0, 7, 1800000,
297 MT6380_PHYLDO_CON_0, 0x80),
298 MT6380_LDO("ldo-vddr", VDDRLDO, ldo_volt_table3, MT6380_LDO_CTRL_0,
299 8, MT6380_DDRLDO_CON_0, 0x3000, MT6380_DDRLDO_CON_0, 0x80),
300 MT6380_LDO("ldo-vt", VTLDO, ldo_volt_table4, MT6380_LDO_CTRL_0, 3,
301 MT6380_TLDO_CON_0, 0x400, MT6380_TLDO_CON_0, 0x20),
302 };
303
mt6380_regulator_probe(struct platform_device * pdev)304 static int mt6380_regulator_probe(struct platform_device *pdev)
305 {
306 struct regmap *regmap = dev_get_regmap(pdev->dev.parent, NULL);
307 struct regulator_config config = {};
308 struct regulator_dev *rdev;
309 int i;
310
311 for (i = 0; i < MT6380_MAX_REGULATOR; i++) {
312 config.dev = &pdev->dev;
313 config.driver_data = &mt6380_regulators[i];
314 config.regmap = regmap;
315 rdev = devm_regulator_register(&pdev->dev,
316 &mt6380_regulators[i].desc,
317 &config);
318 if (IS_ERR(rdev)) {
319 dev_err(&pdev->dev, "failed to register %s\n",
320 mt6380_regulators[i].desc.name);
321 return PTR_ERR(rdev);
322 }
323 }
324 return 0;
325 }
326
327 static const struct platform_device_id mt6380_platform_ids[] = {
328 {"mt6380-regulator", 0},
329 { /* sentinel */ },
330 };
331 MODULE_DEVICE_TABLE(platform, mt6380_platform_ids);
332
333 static const struct of_device_id mt6380_of_match[] = {
334 { .compatible = "mediatek,mt6380-regulator", },
335 { /* sentinel */ },
336 };
337 MODULE_DEVICE_TABLE(of, mt6380_of_match);
338
339 static struct platform_driver mt6380_regulator_driver = {
340 .driver = {
341 .name = "mt6380-regulator",
342 .of_match_table = of_match_ptr(mt6380_of_match),
343 },
344 .probe = mt6380_regulator_probe,
345 .id_table = mt6380_platform_ids,
346 };
347
348 module_platform_driver(mt6380_regulator_driver);
349
350 MODULE_AUTHOR("Chenglin Xu <chenglin.xu@mediatek.com>");
351 MODULE_DESCRIPTION("Regulator Driver for MediaTek MT6380 PMIC");
352 MODULE_LICENSE("GPL v2");
353