1 // SPDX-License-Identifier: GPL-2.0
2 //
3 // Copyright (c) 2017 MediaTek Inc.
4 // Author: Chenglin Xu <chenglin.xu@mediatek.com>
5
6 #include <linux/module.h>
7 #include <linux/of.h>
8 #include <linux/platform_device.h>
9 #include <linux/regmap.h>
10 #include <linux/regulator/driver.h>
11 #include <linux/regulator/machine.h>
12 #include <linux/regulator/mt6380-regulator.h>
13 #include <linux/regulator/of_regulator.h>
14
15 /* PMIC Registers */
16 #define MT6380_ALDO_CON_0 0x0000
17 #define MT6380_BTLDO_CON_0 0x0004
18 #define MT6380_COMP_CON_0 0x0008
19 #define MT6380_CPUBUCK_CON_0 0x000C
20 #define MT6380_CPUBUCK_CON_1 0x0010
21 #define MT6380_CPUBUCK_CON_2 0x0014
22 #define MT6380_DDRLDO_CON_0 0x0018
23 #define MT6380_MLDO_CON_0 0x001C
24 #define MT6380_PALDO_CON_0 0x0020
25 #define MT6380_PHYLDO_CON_0 0x0024
26 #define MT6380_SIDO_CON_0 0x0028
27 #define MT6380_SIDO_CON_1 0x002C
28 #define MT6380_SIDO_CON_2 0x0030
29 #define MT6380_SLDO_CON_0 0x0034
30 #define MT6380_TLDO_CON_0 0x0038
31 #define MT6380_STARTUP_CON_0 0x003C
32 #define MT6380_STARTUP_CON_1 0x0040
33 #define MT6380_SMPS_TOP_CON_0 0x0044
34 #define MT6380_SMPS_TOP_CON_1 0x0048
35 #define MT6380_ANA_CTRL_0 0x0050
36 #define MT6380_ANA_CTRL_1 0x0054
37 #define MT6380_ANA_CTRL_2 0x0058
38 #define MT6380_ANA_CTRL_3 0x005C
39 #define MT6380_ANA_CTRL_4 0x0060
40 #define MT6380_SPK_CON9 0x0064
41 #define MT6380_SPK_CON11 0x0068
42 #define MT6380_SPK_CON12 0x006A
43 #define MT6380_CLK_CTRL 0x0070
44 #define MT6380_PINMUX_CTRL 0x0074
45 #define MT6380_IO_CTRL 0x0078
46 #define MT6380_SLP_MODE_CTRL_0 0x007C
47 #define MT6380_SLP_MODE_CTRL_1 0x0080
48 #define MT6380_SLP_MODE_CTRL_2 0x0084
49 #define MT6380_SLP_MODE_CTRL_3 0x0088
50 #define MT6380_SLP_MODE_CTRL_4 0x008C
51 #define MT6380_SLP_MODE_CTRL_5 0x0090
52 #define MT6380_SLP_MODE_CTRL_6 0x0094
53 #define MT6380_SLP_MODE_CTRL_7 0x0098
54 #define MT6380_SLP_MODE_CTRL_8 0x009C
55 #define MT6380_FCAL_CTRL_0 0x00A0
56 #define MT6380_FCAL_CTRL_1 0x00A4
57 #define MT6380_LDO_CTRL_0 0x00A8
58 #define MT6380_LDO_CTRL_1 0x00AC
59 #define MT6380_LDO_CTRL_2 0x00B0
60 #define MT6380_LDO_CTRL_3 0x00B4
61 #define MT6380_LDO_CTRL_4 0x00B8
62 #define MT6380_DEBUG_CTRL_0 0x00BC
63 #define MT6380_EFU_CTRL_0 0x0200
64 #define MT6380_EFU_CTRL_1 0x0201
65 #define MT6380_EFU_CTRL_2 0x0202
66 #define MT6380_EFU_CTRL_3 0x0203
67 #define MT6380_EFU_CTRL_4 0x0204
68 #define MT6380_EFU_CTRL_5 0x0205
69 #define MT6380_EFU_CTRL_6 0x0206
70 #define MT6380_EFU_CTRL_7 0x0207
71 #define MT6380_EFU_CTRL_8 0x0208
72
73 #define MT6380_REGULATOR_MODE_AUTO 0
74 #define MT6380_REGULATOR_MODE_FORCE_PWM 1
75
76 /*
77 * mt6380 regulators' information
78 *
79 * @desc: standard fields of regulator description
80 * @vselon_reg: Register sections for hardware control mode of bucks
81 * @modeset_reg: Register for controlling the buck/LDO control mode
82 * @modeset_mask: Mask for controlling the buck/LDO control mode
83 */
84 struct mt6380_regulator_info {
85 struct regulator_desc desc;
86 u32 vselon_reg;
87 u32 modeset_reg;
88 u32 modeset_mask;
89 };
90
91 #define MT6380_BUCK(match, vreg, min, max, step, volt_ranges, enreg, \
92 vosel, vosel_mask, enbit, voselon, _modeset_reg, \
93 _modeset_mask) \
94 [MT6380_ID_##vreg] = { \
95 .desc = { \
96 .name = #vreg, \
97 .of_match = of_match_ptr(match), \
98 .ops = &mt6380_volt_range_ops, \
99 .type = REGULATOR_VOLTAGE, \
100 .id = MT6380_ID_##vreg, \
101 .owner = THIS_MODULE, \
102 .n_voltages = ((max) - (min)) / (step) + 1, \
103 .linear_ranges = volt_ranges, \
104 .n_linear_ranges = ARRAY_SIZE(volt_ranges), \
105 .vsel_reg = vosel, \
106 .vsel_mask = vosel_mask, \
107 .enable_reg = enreg, \
108 .enable_mask = BIT(enbit), \
109 }, \
110 .vselon_reg = voselon, \
111 .modeset_reg = _modeset_reg, \
112 .modeset_mask = _modeset_mask, \
113 }
114
115 #define MT6380_LDO(match, vreg, ldo_volt_table, enreg, enbit, vosel, \
116 vosel_mask, _modeset_reg, _modeset_mask) \
117 [MT6380_ID_##vreg] = { \
118 .desc = { \
119 .name = #vreg, \
120 .of_match = of_match_ptr(match), \
121 .ops = &mt6380_volt_table_ops, \
122 .type = REGULATOR_VOLTAGE, \
123 .id = MT6380_ID_##vreg, \
124 .owner = THIS_MODULE, \
125 .n_voltages = ARRAY_SIZE(ldo_volt_table), \
126 .volt_table = ldo_volt_table, \
127 .vsel_reg = vosel, \
128 .vsel_mask = vosel_mask, \
129 .enable_reg = enreg, \
130 .enable_mask = BIT(enbit), \
131 }, \
132 .modeset_reg = _modeset_reg, \
133 .modeset_mask = _modeset_mask, \
134 }
135
136 #define MT6380_REG_FIXED(match, vreg, enreg, enbit, volt, \
137 _modeset_reg, _modeset_mask) \
138 [MT6380_ID_##vreg] = { \
139 .desc = { \
140 .name = #vreg, \
141 .of_match = of_match_ptr(match), \
142 .ops = &mt6380_volt_fixed_ops, \
143 .type = REGULATOR_VOLTAGE, \
144 .id = MT6380_ID_##vreg, \
145 .owner = THIS_MODULE, \
146 .n_voltages = 1, \
147 .enable_reg = enreg, \
148 .enable_mask = BIT(enbit), \
149 .min_uV = volt, \
150 }, \
151 .modeset_reg = _modeset_reg, \
152 .modeset_mask = _modeset_mask, \
153 }
154
155 static const struct linear_range buck_volt_range1[] = {
156 REGULATOR_LINEAR_RANGE(600000, 0, 0xfe, 6250),
157 };
158
159 static const struct linear_range buck_volt_range2[] = {
160 REGULATOR_LINEAR_RANGE(600000, 0, 0xfe, 6250),
161 };
162
163 static const struct linear_range buck_volt_range3[] = {
164 REGULATOR_LINEAR_RANGE(1200000, 0, 0x3c, 25000),
165 };
166
167 static const unsigned int ldo_volt_table1[] = {
168 1400000, 1350000, 1300000, 1250000, 1200000, 1150000, 1100000, 1050000,
169 };
170
171 static const unsigned int ldo_volt_table2[] = {
172 2200000, 3300000,
173 };
174
175 static const unsigned int ldo_volt_table3[] = {
176 1240000, 1390000, 1540000, 1840000,
177 };
178
179 static const unsigned int ldo_volt_table4[] = {
180 2200000, 3300000,
181 };
182
mt6380_regulator_set_mode(struct regulator_dev * rdev,unsigned int mode)183 static int mt6380_regulator_set_mode(struct regulator_dev *rdev,
184 unsigned int mode)
185 {
186 int val = 0;
187 struct mt6380_regulator_info *info = rdev_get_drvdata(rdev);
188
189 switch (mode) {
190 case REGULATOR_MODE_NORMAL:
191 val = MT6380_REGULATOR_MODE_AUTO;
192 break;
193 case REGULATOR_MODE_FAST:
194 val = MT6380_REGULATOR_MODE_FORCE_PWM;
195 break;
196 default:
197 return -EINVAL;
198 }
199
200 val <<= ffs(info->modeset_mask) - 1;
201
202 return regmap_update_bits(rdev->regmap, info->modeset_reg,
203 info->modeset_mask, val);
204 }
205
mt6380_regulator_get_mode(struct regulator_dev * rdev)206 static unsigned int mt6380_regulator_get_mode(struct regulator_dev *rdev)
207 {
208 unsigned int val;
209 unsigned int mode;
210 int ret;
211 struct mt6380_regulator_info *info = rdev_get_drvdata(rdev);
212
213 ret = regmap_read(rdev->regmap, info->modeset_reg, &val);
214 if (ret < 0)
215 return ret;
216
217 val &= info->modeset_mask;
218 val >>= ffs(info->modeset_mask) - 1;
219
220 switch (val) {
221 case MT6380_REGULATOR_MODE_AUTO:
222 mode = REGULATOR_MODE_NORMAL;
223 break;
224 case MT6380_REGULATOR_MODE_FORCE_PWM:
225 mode = REGULATOR_MODE_FAST;
226 break;
227 default:
228 return -EINVAL;
229 }
230
231 return mode;
232 }
233
234 static const struct regulator_ops mt6380_volt_range_ops = {
235 .list_voltage = regulator_list_voltage_linear_range,
236 .map_voltage = regulator_map_voltage_linear_range,
237 .set_voltage_sel = regulator_set_voltage_sel_regmap,
238 .get_voltage_sel = regulator_get_voltage_sel_regmap,
239 .set_voltage_time_sel = regulator_set_voltage_time_sel,
240 .enable = regulator_enable_regmap,
241 .disable = regulator_disable_regmap,
242 .is_enabled = regulator_is_enabled_regmap,
243 .set_mode = mt6380_regulator_set_mode,
244 .get_mode = mt6380_regulator_get_mode,
245 };
246
247 static const struct regulator_ops mt6380_volt_table_ops = {
248 .list_voltage = regulator_list_voltage_table,
249 .map_voltage = regulator_map_voltage_iterate,
250 .set_voltage_sel = regulator_set_voltage_sel_regmap,
251 .get_voltage_sel = regulator_get_voltage_sel_regmap,
252 .set_voltage_time_sel = regulator_set_voltage_time_sel,
253 .enable = regulator_enable_regmap,
254 .disable = regulator_disable_regmap,
255 .is_enabled = regulator_is_enabled_regmap,
256 .set_mode = mt6380_regulator_set_mode,
257 .get_mode = mt6380_regulator_get_mode,
258 };
259
260 static const struct regulator_ops mt6380_volt_fixed_ops = {
261 .list_voltage = regulator_list_voltage_linear,
262 .enable = regulator_enable_regmap,
263 .disable = regulator_disable_regmap,
264 .is_enabled = regulator_is_enabled_regmap,
265 .set_mode = mt6380_regulator_set_mode,
266 .get_mode = mt6380_regulator_get_mode,
267 };
268
269 /* The array is indexed by id(MT6380_ID_XXX) */
270 static struct mt6380_regulator_info mt6380_regulators[] = {
271 MT6380_BUCK("buck-vcore1", VCPU, 600000, 1393750, 6250,
272 buck_volt_range1, MT6380_ANA_CTRL_3, MT6380_ANA_CTRL_1,
273 0xfe, 3, MT6380_ANA_CTRL_1,
274 MT6380_CPUBUCK_CON_0, 0x8000000),
275 MT6380_BUCK("buck-vcore", VCORE, 600000, 1393750, 6250,
276 buck_volt_range2, MT6380_ANA_CTRL_3, MT6380_ANA_CTRL_2,
277 0xfe, 2, MT6380_ANA_CTRL_2, MT6380_SIDO_CON_0, 0x1000000),
278 MT6380_BUCK("buck-vrf", VRF, 1200000, 1575000, 25000,
279 buck_volt_range3, MT6380_ANA_CTRL_3, MT6380_SIDO_CON_0,
280 0x78, 1, MT6380_SIDO_CON_0, MT6380_SIDO_CON_0, 0x8000),
281 MT6380_LDO("ldo-vm", VMLDO, ldo_volt_table1, MT6380_LDO_CTRL_0,
282 1, MT6380_MLDO_CON_0, 0xE000, MT6380_ANA_CTRL_1, 0x4000000),
283 MT6380_LDO("ldo-va", VALDO, ldo_volt_table2, MT6380_LDO_CTRL_0,
284 2, MT6380_ALDO_CON_0, 0x400, MT6380_ALDO_CON_0, 0x20),
285 MT6380_REG_FIXED("ldo-vphy", VPHYLDO, MT6380_LDO_CTRL_0, 7, 1800000,
286 MT6380_PHYLDO_CON_0, 0x80),
287 MT6380_LDO("ldo-vddr", VDDRLDO, ldo_volt_table3, MT6380_LDO_CTRL_0,
288 8, MT6380_DDRLDO_CON_0, 0x3000, MT6380_DDRLDO_CON_0, 0x80),
289 MT6380_LDO("ldo-vt", VTLDO, ldo_volt_table4, MT6380_LDO_CTRL_0, 3,
290 MT6380_TLDO_CON_0, 0x400, MT6380_TLDO_CON_0, 0x20),
291 };
292
mt6380_regulator_probe(struct platform_device * pdev)293 static int mt6380_regulator_probe(struct platform_device *pdev)
294 {
295 struct regmap *regmap = dev_get_regmap(pdev->dev.parent, NULL);
296 struct regulator_config config = {};
297 struct regulator_dev *rdev;
298 int i;
299
300 for (i = 0; i < MT6380_MAX_REGULATOR; i++) {
301 config.dev = &pdev->dev;
302 config.driver_data = &mt6380_regulators[i];
303 config.regmap = regmap;
304 rdev = devm_regulator_register(&pdev->dev,
305 &mt6380_regulators[i].desc,
306 &config);
307 if (IS_ERR(rdev)) {
308 dev_err(&pdev->dev, "failed to register %s\n",
309 mt6380_regulators[i].desc.name);
310 return PTR_ERR(rdev);
311 }
312 }
313 return 0;
314 }
315
316 static const struct platform_device_id mt6380_platform_ids[] = {
317 {"mt6380-regulator", 0},
318 { /* sentinel */ },
319 };
320 MODULE_DEVICE_TABLE(platform, mt6380_platform_ids);
321
322 static const struct of_device_id __maybe_unused mt6380_of_match[] = {
323 { .compatible = "mediatek,mt6380-regulator", },
324 { /* sentinel */ },
325 };
326 MODULE_DEVICE_TABLE(of, mt6380_of_match);
327
328 static struct platform_driver mt6380_regulator_driver = {
329 .driver = {
330 .name = "mt6380-regulator",
331 .of_match_table = of_match_ptr(mt6380_of_match),
332 },
333 .probe = mt6380_regulator_probe,
334 .id_table = mt6380_platform_ids,
335 };
336
337 module_platform_driver(mt6380_regulator_driver);
338
339 MODULE_AUTHOR("Chenglin Xu <chenglin.xu@mediatek.com>");
340 MODULE_DESCRIPTION("Regulator Driver for MediaTek MT6380 PMIC");
341 MODULE_LICENSE("GPL v2");
342