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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/mfd/mt6397/core.h>
11#include <linux/mfd/mt6397/registers.h>
12#include <linux/regulator/driver.h>
13#include <linux/regulator/machine.h>
14#include <linux/regulator/mt6397-regulator.h>
15#include <linux/regulator/of_regulator.h>
16#include <dt-bindings/regulator/mediatek,mt6397-regulator.h>
17
18
19
20
21
22
23
24
25
26
27struct mt6397_regulator_info {
28 struct regulator_desc desc;
29 u32 qi;
30 u32 vselon_reg;
31 u32 vselctrl_reg;
32 u32 vselctrl_mask;
33 u32 modeset_reg;
34 u32 modeset_mask;
35};
36
37#define MT6397_BUCK(match, vreg, min, max, step, volt_ranges, enreg, \
38 vosel, vosel_mask, voselon, vosel_ctrl, _modeset_reg, \
39 _modeset_shift) \
40[MT6397_ID_##vreg] = { \
41 .desc = { \
42 .name = #vreg, \
43 .of_match = of_match_ptr(match), \
44 .ops = &mt6397_volt_range_ops, \
45 .type = REGULATOR_VOLTAGE, \
46 .id = MT6397_ID_##vreg, \
47 .owner = THIS_MODULE, \
48 .n_voltages = (max - min)/step + 1, \
49 .linear_ranges = volt_ranges, \
50 .n_linear_ranges = ARRAY_SIZE(volt_ranges), \
51 .vsel_reg = vosel, \
52 .vsel_mask = vosel_mask, \
53 .enable_reg = enreg, \
54 .enable_mask = BIT(0), \
55 .of_map_mode = mt6397_map_mode, \
56 }, \
57 .qi = BIT(13), \
58 .vselon_reg = voselon, \
59 .vselctrl_reg = vosel_ctrl, \
60 .vselctrl_mask = BIT(1), \
61 .modeset_reg = _modeset_reg, \
62 .modeset_mask = BIT(_modeset_shift), \
63}
64
65#define MT6397_LDO(match, vreg, ldo_volt_table, enreg, enbit, vosel, \
66 vosel_mask) \
67[MT6397_ID_##vreg] = { \
68 .desc = { \
69 .name = #vreg, \
70 .of_match = of_match_ptr(match), \
71 .ops = &mt6397_volt_table_ops, \
72 .type = REGULATOR_VOLTAGE, \
73 .id = MT6397_ID_##vreg, \
74 .owner = THIS_MODULE, \
75 .n_voltages = ARRAY_SIZE(ldo_volt_table), \
76 .volt_table = ldo_volt_table, \
77 .vsel_reg = vosel, \
78 .vsel_mask = vosel_mask, \
79 .enable_reg = enreg, \
80 .enable_mask = BIT(enbit), \
81 }, \
82 .qi = BIT(15), \
83}
84
85#define MT6397_REG_FIXED(match, vreg, enreg, enbit, volt) \
86[MT6397_ID_##vreg] = { \
87 .desc = { \
88 .name = #vreg, \
89 .of_match = of_match_ptr(match), \
90 .ops = &mt6397_volt_fixed_ops, \
91 .type = REGULATOR_VOLTAGE, \
92 .id = MT6397_ID_##vreg, \
93 .owner = THIS_MODULE, \
94 .n_voltages = 1, \
95 .enable_reg = enreg, \
96 .enable_mask = BIT(enbit), \
97 .min_uV = volt, \
98 }, \
99 .qi = BIT(15), \
100}
101
102static const struct linear_range buck_volt_range1[] = {
103 REGULATOR_LINEAR_RANGE(700000, 0, 0x7f, 6250),
104};
105
106static const struct linear_range buck_volt_range2[] = {
107 REGULATOR_LINEAR_RANGE(800000, 0, 0x7f, 6250),
108};
109
110static const struct linear_range buck_volt_range3[] = {
111 REGULATOR_LINEAR_RANGE(1500000, 0, 0x1f, 20000),
112};
113
114static const unsigned int ldo_volt_table1[] = {
115 1500000, 1800000, 2500000, 2800000,
116};
117
118static const unsigned int ldo_volt_table2[] = {
119 1800000, 3300000,
120};
121
122static const unsigned int ldo_volt_table3[] = {
123 3000000, 3300000,
124};
125
126static const unsigned int ldo_volt_table4[] = {
127 1220000, 1300000, 1500000, 1800000, 2500000, 2800000, 3000000, 3300000,
128};
129
130static const unsigned int ldo_volt_table5[] = {
131 1200000, 1300000, 1500000, 1800000, 2500000, 2800000, 3000000, 3300000,
132};
133
134static const unsigned int ldo_volt_table5_v2[] = {
135 1200000, 1000000, 1500000, 1800000, 2500000, 2800000, 3000000, 3300000,
136};
137
138static const unsigned int ldo_volt_table6[] = {
139 1200000, 1300000, 1500000, 1800000, 2500000, 2800000, 3000000, 2000000,
140};
141
142static const unsigned int ldo_volt_table7[] = {
143 1300000, 1500000, 1800000, 2000000, 2500000, 2800000, 3000000, 3300000,
144};
145
146static unsigned int mt6397_map_mode(unsigned int mode)
147{
148 switch (mode) {
149 case MT6397_BUCK_MODE_AUTO:
150 return REGULATOR_MODE_NORMAL;
151 case MT6397_BUCK_MODE_FORCE_PWM:
152 return REGULATOR_MODE_FAST;
153 default:
154 return REGULATOR_MODE_INVALID;
155 }
156}
157
158static int mt6397_regulator_set_mode(struct regulator_dev *rdev,
159 unsigned int mode)
160{
161 struct mt6397_regulator_info *info = rdev_get_drvdata(rdev);
162 int ret, val;
163
164 switch (mode) {
165 case REGULATOR_MODE_FAST:
166 val = MT6397_BUCK_MODE_FORCE_PWM;
167 break;
168 case REGULATOR_MODE_NORMAL:
169 val = MT6397_BUCK_MODE_AUTO;
170 break;
171 default:
172 ret = -EINVAL;
173 goto err_mode;
174 }
175
176 dev_dbg(&rdev->dev, "mt6397 buck set_mode %#x, %#x, %#x\n",
177 info->modeset_reg, info->modeset_mask, val);
178
179 val <<= ffs(info->modeset_mask) - 1;
180
181 ret = regmap_update_bits(rdev->regmap, info->modeset_reg,
182 info->modeset_mask, val);
183err_mode:
184 if (ret != 0) {
185 dev_err(&rdev->dev,
186 "Failed to set mt6397 buck mode: %d\n", ret);
187 return ret;
188 }
189
190 return 0;
191}
192
193static unsigned int mt6397_regulator_get_mode(struct regulator_dev *rdev)
194{
195 struct mt6397_regulator_info *info = rdev_get_drvdata(rdev);
196 int ret, regval;
197
198 ret = regmap_read(rdev->regmap, info->modeset_reg, ®val);
199 if (ret != 0) {
200 dev_err(&rdev->dev,
201 "Failed to get mt6397 buck mode: %d\n", ret);
202 return ret;
203 }
204
205 regval &= info->modeset_mask;
206 regval >>= ffs(info->modeset_mask) - 1;
207
208 switch (regval) {
209 case MT6397_BUCK_MODE_AUTO:
210 return REGULATOR_MODE_NORMAL;
211 case MT6397_BUCK_MODE_FORCE_PWM:
212 return REGULATOR_MODE_FAST;
213 default:
214 return -EINVAL;
215 }
216}
217
218static int mt6397_get_status(struct regulator_dev *rdev)
219{
220 int ret;
221 u32 regval;
222 struct mt6397_regulator_info *info = rdev_get_drvdata(rdev);
223
224 ret = regmap_read(rdev->regmap, info->desc.enable_reg, ®val);
225 if (ret != 0) {
226 dev_err(&rdev->dev, "Failed to get enable reg: %d\n", ret);
227 return ret;
228 }
229
230 return (regval & info->qi) ? REGULATOR_STATUS_ON : REGULATOR_STATUS_OFF;
231}
232
233static const struct regulator_ops mt6397_volt_range_ops = {
234 .list_voltage = regulator_list_voltage_linear_range,
235 .map_voltage = regulator_map_voltage_linear_range,
236 .set_voltage_sel = regulator_set_voltage_sel_regmap,
237 .get_voltage_sel = regulator_get_voltage_sel_regmap,
238 .set_voltage_time_sel = regulator_set_voltage_time_sel,
239 .enable = regulator_enable_regmap,
240 .disable = regulator_disable_regmap,
241 .is_enabled = regulator_is_enabled_regmap,
242 .get_status = mt6397_get_status,
243 .set_mode = mt6397_regulator_set_mode,
244 .get_mode = mt6397_regulator_get_mode,
245};
246
247static const struct regulator_ops mt6397_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 .get_status = mt6397_get_status,
257};
258
259static const struct regulator_ops mt6397_volt_fixed_ops = {
260 .list_voltage = regulator_list_voltage_linear,
261 .enable = regulator_enable_regmap,
262 .disable = regulator_disable_regmap,
263 .is_enabled = regulator_is_enabled_regmap,
264 .get_status = mt6397_get_status,
265};
266
267
268static struct mt6397_regulator_info mt6397_regulators[] = {
269 MT6397_BUCK("buck_vpca15", VPCA15, 700000, 1493750, 6250,
270 buck_volt_range1, MT6397_VCA15_CON7, MT6397_VCA15_CON9, 0x7f,
271 MT6397_VCA15_CON10, MT6397_VCA15_CON5, MT6397_VCA15_CON2, 11),
272 MT6397_BUCK("buck_vpca7", VPCA7, 700000, 1493750, 6250,
273 buck_volt_range1, MT6397_VPCA7_CON7, MT6397_VPCA7_CON9, 0x7f,
274 MT6397_VPCA7_CON10, MT6397_VPCA7_CON5, MT6397_VPCA7_CON2, 8),
275 MT6397_BUCK("buck_vsramca15", VSRAMCA15, 700000, 1493750, 6250,
276 buck_volt_range1, MT6397_VSRMCA15_CON7, MT6397_VSRMCA15_CON9,
277 0x7f, MT6397_VSRMCA15_CON10, MT6397_VSRMCA15_CON5,
278 MT6397_VSRMCA15_CON2, 8),
279 MT6397_BUCK("buck_vsramca7", VSRAMCA7, 700000, 1493750, 6250,
280 buck_volt_range1, MT6397_VSRMCA7_CON7, MT6397_VSRMCA7_CON9,
281 0x7f, MT6397_VSRMCA7_CON10, MT6397_VSRMCA7_CON5,
282 MT6397_VSRMCA7_CON2, 8),
283 MT6397_BUCK("buck_vcore", VCORE, 700000, 1493750, 6250,
284 buck_volt_range1, MT6397_VCORE_CON7, MT6397_VCORE_CON9, 0x7f,
285 MT6397_VCORE_CON10, MT6397_VCORE_CON5, MT6397_VCORE_CON2, 8),
286 MT6397_BUCK("buck_vgpu", VGPU, 700000, 1493750, 6250, buck_volt_range1,
287 MT6397_VGPU_CON7, MT6397_VGPU_CON9, 0x7f,
288 MT6397_VGPU_CON10, MT6397_VGPU_CON5, MT6397_VGPU_CON2, 8),
289 MT6397_BUCK("buck_vdrm", VDRM, 800000, 1593750, 6250, buck_volt_range2,
290 MT6397_VDRM_CON7, MT6397_VDRM_CON9, 0x7f,
291 MT6397_VDRM_CON10, MT6397_VDRM_CON5, MT6397_VDRM_CON2, 8),
292 MT6397_BUCK("buck_vio18", VIO18, 1500000, 2120000, 20000,
293 buck_volt_range3, MT6397_VIO18_CON7, MT6397_VIO18_CON9, 0x1f,
294 MT6397_VIO18_CON10, MT6397_VIO18_CON5, MT6397_VIO18_CON2, 8),
295 MT6397_REG_FIXED("ldo_vtcxo", VTCXO, MT6397_ANALDO_CON0, 10, 2800000),
296 MT6397_REG_FIXED("ldo_va28", VA28, MT6397_ANALDO_CON1, 14, 2800000),
297 MT6397_LDO("ldo_vcama", VCAMA, ldo_volt_table1,
298 MT6397_ANALDO_CON2, 15, MT6397_ANALDO_CON6, 0xC0),
299 MT6397_REG_FIXED("ldo_vio28", VIO28, MT6397_DIGLDO_CON0, 14, 2800000),
300 MT6397_REG_FIXED("ldo_vusb", VUSB, MT6397_DIGLDO_CON1, 14, 3300000),
301 MT6397_LDO("ldo_vmc", VMC, ldo_volt_table2,
302 MT6397_DIGLDO_CON2, 12, MT6397_DIGLDO_CON29, 0x10),
303 MT6397_LDO("ldo_vmch", VMCH, ldo_volt_table3,
304 MT6397_DIGLDO_CON3, 14, MT6397_DIGLDO_CON17, 0x80),
305 MT6397_LDO("ldo_vemc3v3", VEMC3V3, ldo_volt_table3,
306 MT6397_DIGLDO_CON4, 14, MT6397_DIGLDO_CON18, 0x10),
307 MT6397_LDO("ldo_vgp1", VGP1, ldo_volt_table4,
308 MT6397_DIGLDO_CON5, 15, MT6397_DIGLDO_CON19, 0xE0),
309 MT6397_LDO("ldo_vgp2", VGP2, ldo_volt_table5,
310 MT6397_DIGLDO_CON6, 15, MT6397_DIGLDO_CON20, 0xE0),
311 MT6397_LDO("ldo_vgp3", VGP3, ldo_volt_table5,
312 MT6397_DIGLDO_CON7, 15, MT6397_DIGLDO_CON21, 0xE0),
313 MT6397_LDO("ldo_vgp4", VGP4, ldo_volt_table5,
314 MT6397_DIGLDO_CON8, 15, MT6397_DIGLDO_CON22, 0xE0),
315 MT6397_LDO("ldo_vgp5", VGP5, ldo_volt_table6,
316 MT6397_DIGLDO_CON9, 15, MT6397_DIGLDO_CON23, 0xE0),
317 MT6397_LDO("ldo_vgp6", VGP6, ldo_volt_table5,
318 MT6397_DIGLDO_CON10, 15, MT6397_DIGLDO_CON33, 0xE0),
319 MT6397_LDO("ldo_vibr", VIBR, ldo_volt_table7,
320 MT6397_DIGLDO_CON24, 15, MT6397_DIGLDO_CON25, 0xE00),
321};
322
323static int mt6397_set_buck_vosel_reg(struct platform_device *pdev)
324{
325 struct mt6397_chip *mt6397 = dev_get_drvdata(pdev->dev.parent);
326 int i;
327 u32 regval;
328
329 for (i = 0; i < MT6397_MAX_REGULATOR; i++) {
330 if (mt6397_regulators[i].vselctrl_reg) {
331 if (regmap_read(mt6397->regmap,
332 mt6397_regulators[i].vselctrl_reg,
333 ®val) < 0) {
334 dev_err(&pdev->dev,
335 "Failed to read buck ctrl\n");
336 return -EIO;
337 }
338
339 if (regval & mt6397_regulators[i].vselctrl_mask) {
340 mt6397_regulators[i].desc.vsel_reg =
341 mt6397_regulators[i].vselon_reg;
342 }
343 }
344 }
345
346 return 0;
347}
348
349static int mt6397_regulator_probe(struct platform_device *pdev)
350{
351 struct mt6397_chip *mt6397 = dev_get_drvdata(pdev->dev.parent);
352 struct regulator_config config = {};
353 struct regulator_dev *rdev;
354 int i;
355 u32 reg_value, version;
356
357
358 if (mt6397_set_buck_vosel_reg(pdev))
359 return -EIO;
360
361
362 if (regmap_read(mt6397->regmap, MT6397_CID, ®_value) < 0) {
363 dev_err(&pdev->dev, "Failed to read Chip ID\n");
364 return -EIO;
365 }
366 dev_info(&pdev->dev, "Chip ID = 0x%x\n", reg_value);
367
368 version = (reg_value & 0xFF);
369 switch (version) {
370 case MT6397_REGULATOR_ID91:
371 mt6397_regulators[MT6397_ID_VGP2].desc.volt_table =
372 ldo_volt_table5_v2;
373 break;
374 default:
375 break;
376 }
377
378 for (i = 0; i < MT6397_MAX_REGULATOR; i++) {
379 config.dev = &pdev->dev;
380 config.driver_data = &mt6397_regulators[i];
381 config.regmap = mt6397->regmap;
382 rdev = devm_regulator_register(&pdev->dev,
383 &mt6397_regulators[i].desc, &config);
384 if (IS_ERR(rdev)) {
385 dev_err(&pdev->dev, "failed to register %s\n",
386 mt6397_regulators[i].desc.name);
387 return PTR_ERR(rdev);
388 }
389 }
390
391 return 0;
392}
393
394static const struct platform_device_id mt6397_platform_ids[] = {
395 {"mt6397-regulator", 0},
396 { },
397};
398MODULE_DEVICE_TABLE(platform, mt6397_platform_ids);
399
400static const struct of_device_id mt6397_of_match[] = {
401 { .compatible = "mediatek,mt6397-regulator", },
402 { },
403};
404MODULE_DEVICE_TABLE(of, mt6397_of_match);
405
406static struct platform_driver mt6397_regulator_driver = {
407 .driver = {
408 .name = "mt6397-regulator",
409 .of_match_table = of_match_ptr(mt6397_of_match),
410 },
411 .probe = mt6397_regulator_probe,
412 .id_table = mt6397_platform_ids,
413};
414
415module_platform_driver(mt6397_regulator_driver);
416
417MODULE_AUTHOR("Flora Fu <flora.fu@mediatek.com>");
418MODULE_DESCRIPTION("Regulator Driver for MediaTek MT6397 PMIC");
419MODULE_LICENSE("GPL");
420
