1// SPDX-License-Identifier: GPL-2.0
2//
3// Copyright (c) 2022 MediaTek Inc.
4// Copyright (c) 2022 BayLibre, SAS.
5// Author: Chen Zhong <chen.zhong@mediatek.com>
6// Author: Fabien Parent <fparent@baylibre.com>
7// Author: Alexandre Mergnat <amergnat@baylibre.com>
8//
9// Based on mt6397-regulator.c
10//
11
12#include <linux/module.h>
13#include <linux/of.h>
14#include <linux/platform_device.h>
15#include <linux/regmap.h>
16#include <linux/mfd/mt6397/core.h>
17#include <linux/mfd/mt6357/registers.h>
18#include <linux/regulator/driver.h>
19#include <linux/regulator/machine.h>
20#include <linux/regulator/mt6357-regulator.h>
21#include <linux/regulator/of_regulator.h>
22
23/*
24 * MT6357 regulators' information
25 *
26 * @desc: standard fields of regulator description.
27 * @da_vsel_reg: Monitor register for query buck's voltage.
28 * @da_vsel_mask: Mask for query buck's voltage.
29 */
30struct mt6357_regulator_info {
31 struct regulator_desc desc;
32 u32 da_vsel_reg;
33 u32 da_vsel_mask;
34};
35
36#define MT6357_BUCK(match, vreg, min, max, step, \
37 volt_ranges, vosel_reg, vosel_mask, _da_vsel_mask) \
38[MT6357_ID_##vreg] = { \
39 .desc = { \
40 .name = #vreg, \
41 .of_match = of_match_ptr(match), \
42 .regulators_node = "regulators", \
43 .ops = &mt6357_volt_range_ops, \
44 .type = REGULATOR_VOLTAGE, \
45 .id = MT6357_ID_##vreg, \
46 .owner = THIS_MODULE, \
47 .n_voltages = ((max) - (min)) / (step) + 1, \
48 .linear_ranges = volt_ranges, \
49 .n_linear_ranges = ARRAY_SIZE(volt_ranges), \
50 .vsel_reg = vosel_reg, \
51 .vsel_mask = vosel_mask, \
52 .enable_reg = MT6357_BUCK_##vreg##_CON0, \
53 .enable_mask = BIT(0), \
54 }, \
55 .da_vsel_reg = MT6357_BUCK_##vreg##_DBG0, \
56 .da_vsel_mask = vosel_mask, \
57}
58
59#define MT6357_LDO(match, vreg, ldo_volt_table, \
60 enreg, vosel, vosel_mask) \
61[MT6357_ID_##vreg] = { \
62 .desc = { \
63 .name = #vreg, \
64 .of_match = of_match_ptr(match), \
65 .regulators_node = "regulators", \
66 .ops = &mt6357_volt_table_ops, \
67 .type = REGULATOR_VOLTAGE, \
68 .id = MT6357_ID_##vreg, \
69 .owner = THIS_MODULE, \
70 .n_voltages = ARRAY_SIZE(ldo_volt_table), \
71 .volt_table = ldo_volt_table, \
72 .vsel_reg = vosel, \
73 .vsel_mask = vosel_mask, \
74 .enable_reg = enreg, \
75 .enable_mask = BIT(0), \
76 }, \
77}
78
79#define MT6357_LDO1(match, vreg, min, max, step, volt_ranges, \
80 enreg, vosel, vosel_mask) \
81[MT6357_ID_##vreg] = { \
82 .desc = { \
83 .name = #vreg, \
84 .of_match = of_match_ptr(match), \
85 .regulators_node = "regulators", \
86 .ops = &mt6357_volt_range_ops, \
87 .type = REGULATOR_VOLTAGE, \
88 .id = MT6357_ID_##vreg, \
89 .owner = THIS_MODULE, \
90 .n_voltages = ((max) - (min)) / (step) + 1, \
91 .linear_ranges = volt_ranges, \
92 .n_linear_ranges = ARRAY_SIZE(volt_ranges), \
93 .vsel_reg = vosel, \
94 .vsel_mask = vosel_mask, \
95 .enable_reg = enreg, \
96 .enable_mask = BIT(0), \
97 }, \
98 .da_vsel_reg = MT6357_LDO_##vreg##_DBG0, \
99 .da_vsel_mask = 0x7f00, \
100}
101
102#define MT6357_REG_FIXED(match, vreg, volt) \
103[MT6357_ID_##vreg] = { \
104 .desc = { \
105 .name = #vreg, \
106 .of_match = of_match_ptr(match), \
107 .regulators_node = "regulators", \
108 .ops = &mt6357_volt_fixed_ops, \
109 .type = REGULATOR_VOLTAGE, \
110 .id = MT6357_ID_##vreg, \
111 .owner = THIS_MODULE, \
112 .n_voltages = 1, \
113 .enable_reg = MT6357_LDO_##vreg##_CON0, \
114 .enable_mask = BIT(0), \
115 .min_uV = volt, \
116 }, \
117}
118
119/**
120 * mt6357_get_buck_voltage_sel - get_voltage_sel for regmap users
121 *
122 * @rdev: regulator to operate on
123 *
124 * Regulators that use regmap for their register I/O can set the
125 * da_vsel_reg and da_vsel_mask fields in the info structure and
126 * then use this as their get_voltage_sel operation.
127 */
128static int mt6357_get_buck_voltage_sel(struct regulator_dev *rdev)
129{
130 int ret, regval;
131 struct mt6357_regulator_info *info = rdev_get_drvdata(rdev);
132
133 ret = regmap_read(map: rdev->regmap, reg: info->da_vsel_reg, val: &regval);
134 if (ret != 0) {
135 dev_err(&rdev->dev,
136 "Failed to get mt6357 Buck %s vsel reg: %d\n",
137 info->desc.name, ret);
138 return ret;
139 }
140
141 regval &= info->da_vsel_mask;
142 regval >>= ffs(info->da_vsel_mask) - 1;
143
144 return regval;
145}
146
147static const struct regulator_ops mt6357_volt_range_ops = {
148 .list_voltage = regulator_list_voltage_linear_range,
149 .map_voltage = regulator_map_voltage_linear_range,
150 .set_voltage_sel = regulator_set_voltage_sel_regmap,
151 .get_voltage_sel = mt6357_get_buck_voltage_sel,
152 .set_voltage_time_sel = regulator_set_voltage_time_sel,
153 .enable = regulator_enable_regmap,
154 .disable = regulator_disable_regmap,
155 .is_enabled = regulator_is_enabled_regmap,
156};
157
158static const struct regulator_ops mt6357_volt_table_ops = {
159 .list_voltage = regulator_list_voltage_table,
160 .map_voltage = regulator_map_voltage_iterate,
161 .set_voltage_sel = regulator_set_voltage_sel_regmap,
162 .get_voltage_sel = regulator_get_voltage_sel_regmap,
163 .set_voltage_time_sel = regulator_set_voltage_time_sel,
164 .enable = regulator_enable_regmap,
165 .disable = regulator_disable_regmap,
166 .is_enabled = regulator_is_enabled_regmap,
167};
168
169static const struct regulator_ops mt6357_volt_fixed_ops = {
170 .list_voltage = regulator_list_voltage_linear,
171 .enable = regulator_enable_regmap,
172 .disable = regulator_disable_regmap,
173 .is_enabled = regulator_is_enabled_regmap,
174};
175
176static const int vxo22_voltages[] = {
177 2200000,
178 0,
179 2400000,
180};
181
182static const int vefuse_voltages[] = {
183 1200000,
184 1300000,
185 1500000,
186 0,
187 1800000,
188 0,
189 0,
190 0,
191 0,
192 2800000,
193 2900000,
194 3000000,
195 0,
196 3300000,
197};
198
199static const int vcn33_voltages[] = {
200 0,
201 3300000,
202 3400000,
203 3500000,
204};
205
206static const int vcama_voltages[] = {
207 0,
208 0,
209 0,
210 0,
211 0,
212 0,
213 0,
214 2500000,
215 0,
216 0,
217 2800000,
218};
219
220static const int vcamd_voltages[] = {
221 0,
222 0,
223 0,
224 0,
225 1000000,
226 1100000,
227 1200000,
228 1300000,
229 0,
230 1500000,
231 0,
232 0,
233 1800000,
234};
235
236static const int vldo28_voltages[] = {
237 0,
238 2800000,
239 0,
240 3000000,
241};
242
243static const int vdram_voltages[] = {
244 0,
245 1100000,
246 1200000,
247};
248
249static const int vsim_voltages[] = {
250 0,
251 0,
252 0,
253 1700000,
254 1800000,
255 0,
256 0,
257 0,
258 2700000,
259 0,
260 0,
261 3000000,
262 3100000,
263};
264
265static const int vibr_voltages[] = {
266 1200000,
267 1300000,
268 1500000,
269 0,
270 1800000,
271 2000000,
272 0,
273 0,
274 0,
275 2800000,
276 0,
277 3000000,
278 0,
279 3300000,
280};
281
282static const int vmc_voltages[] = {
283 0,
284 0,
285 0,
286 0,
287 1800000,
288 0,
289 0,
290 0,
291 0,
292 0,
293 2900000,
294 3000000,
295 0,
296 3300000,
297};
298
299static const int vmch_voltages[] = {
300 0,
301 0,
302 2900000,
303 3000000,
304 0,
305 3300000,
306};
307
308static const int vemc_voltages[] = {
309 0,
310 0,
311 2900000,
312 3000000,
313 0,
314 3300000,
315};
316
317static const int vusb_voltages[] = {
318 0,
319 0,
320 0,
321 3000000,
322 3100000,
323};
324
325static const struct linear_range buck_volt_range1[] = {
326 REGULATOR_LINEAR_RANGE(518750, 0, 0x7f, 6250),
327};
328
329static const struct linear_range buck_volt_range2[] = {
330 REGULATOR_LINEAR_RANGE(500000, 0, 0x7f, 6250),
331};
332
333static const struct linear_range buck_volt_range3[] = {
334 REGULATOR_LINEAR_RANGE(500000, 0, 0x3f, 50000),
335};
336
337static const struct linear_range buck_volt_range4[] = {
338 REGULATOR_LINEAR_RANGE(1200000, 0, 0x7f, 12500),
339};
340
341/* The array is indexed by id(MT6357_ID_XXX) */
342static struct mt6357_regulator_info mt6357_regulators[] = {
343 /* Bucks */
344 MT6357_BUCK("buck-vcore", VCORE, 518750, 1312500, 6250,
345 buck_volt_range1, MT6357_BUCK_VCORE_ELR0, 0x7f, 0x7f),
346 MT6357_BUCK("buck-vproc", VPROC, 518750, 1312500, 6250,
347 buck_volt_range1, MT6357_BUCK_VPROC_ELR0, 0x7f, 0x7f),
348 MT6357_BUCK("buck-vmodem", VMODEM, 500000, 1293750, 6250,
349 buck_volt_range2, MT6357_BUCK_VMODEM_ELR0, 0x7f, 0x7f),
350 MT6357_BUCK("buck-vpa", VPA, 500000, 3650000, 50000,
351 buck_volt_range3, MT6357_BUCK_VPA_CON1, 0x3f, 0x3f),
352 MT6357_BUCK("buck-vs1", VS1, 1200000, 2787500, 12500,
353 buck_volt_range4, MT6357_BUCK_VS1_ELR0, 0x7f, 0x7f),
354
355 /* LDOs */
356 MT6357_LDO("ldo-vcama", VCAMA, vcama_voltages,
357 MT6357_LDO_VCAMA_CON0, MT6357_VCAMA_ANA_CON0, 0xf00),
358 MT6357_LDO("ldo-vcamd", VCAMD, vcamd_voltages,
359 MT6357_LDO_VCAMD_CON0, MT6357_VCAMD_ANA_CON0, 0xf00),
360 MT6357_LDO("ldo-vcn33-bt", VCN33_BT, vcn33_voltages,
361 MT6357_LDO_VCN33_CON0_0, MT6357_VCN33_ANA_CON0, 0x300),
362 MT6357_LDO("ldo-vcn33-wifi", VCN33_WIFI, vcn33_voltages,
363 MT6357_LDO_VCN33_CON0_1, MT6357_VCN33_ANA_CON0, 0x300),
364 MT6357_LDO("ldo-vdram", VDRAM, vdram_voltages,
365 MT6357_LDO_VDRAM_CON0, MT6357_VDRAM_ELR_2, 0x300),
366 MT6357_LDO("ldo-vefuse", VEFUSE, vefuse_voltages,
367 MT6357_LDO_VEFUSE_CON0, MT6357_VEFUSE_ANA_CON0, 0xf00),
368 MT6357_LDO("ldo-vemc", VEMC, vemc_voltages,
369 MT6357_LDO_VEMC_CON0, MT6357_VEMC_ANA_CON0, 0x700),
370 MT6357_LDO("ldo-vibr", VIBR, vibr_voltages,
371 MT6357_LDO_VIBR_CON0, MT6357_VIBR_ANA_CON0, 0xf00),
372 MT6357_LDO("ldo-vldo28", VLDO28, vldo28_voltages,
373 MT6357_LDO_VLDO28_CON0_0, MT6357_VLDO28_ANA_CON0, 0x300),
374 MT6357_LDO("ldo-vmc", VMC, vmc_voltages,
375 MT6357_LDO_VMC_CON0, MT6357_VMC_ANA_CON0, 0xf00),
376 MT6357_LDO("ldo-vmch", VMCH, vmch_voltages,
377 MT6357_LDO_VMCH_CON0, MT6357_VMCH_ANA_CON0, 0x700),
378 MT6357_LDO("ldo-vsim1", VSIM1, vsim_voltages,
379 MT6357_LDO_VSIM1_CON0, MT6357_VSIM1_ANA_CON0, 0xf00),
380 MT6357_LDO("ldo-vsim2", VSIM2, vsim_voltages,
381 MT6357_LDO_VSIM2_CON0, MT6357_VSIM2_ANA_CON0, 0xf00),
382 MT6357_LDO("ldo-vusb33", VUSB33, vusb_voltages,
383 MT6357_LDO_VUSB33_CON0_0, MT6357_VUSB33_ANA_CON0, 0x700),
384 MT6357_LDO("ldo-vxo22", VXO22, vxo22_voltages,
385 MT6357_LDO_VXO22_CON0, MT6357_VXO22_ANA_CON0, 0x300),
386
387 MT6357_LDO1("ldo-vsram-proc", VSRAM_PROC, 518750, 1312500, 6250,
388 buck_volt_range1, MT6357_LDO_VSRAM_PROC_CON0,
389 MT6357_LDO_VSRAM_CON0, 0x7f00),
390 MT6357_LDO1("ldo-vsram-others", VSRAM_OTHERS, 518750, 1312500, 6250,
391 buck_volt_range1, MT6357_LDO_VSRAM_OTHERS_CON0,
392 MT6357_LDO_VSRAM_CON1, 0x7f00),
393
394 MT6357_REG_FIXED("ldo-vaud28", VAUD28, 2800000),
395 MT6357_REG_FIXED("ldo-vaux18", VAUX18, 1800000),
396 MT6357_REG_FIXED("ldo-vcamio18", VCAMIO, 1800000),
397 MT6357_REG_FIXED("ldo-vcn18", VCN18, 1800000),
398 MT6357_REG_FIXED("ldo-vcn28", VCN28, 2800000),
399 MT6357_REG_FIXED("ldo-vfe28", VFE28, 2800000),
400 MT6357_REG_FIXED("ldo-vio18", VIO18, 1800000),
401 MT6357_REG_FIXED("ldo-vio28", VIO28, 2800000),
402 MT6357_REG_FIXED("ldo-vrf12", VRF12, 1200000),
403 MT6357_REG_FIXED("ldo-vrf18", VRF18, 1800000),
404};
405
406static int mt6357_regulator_probe(struct platform_device *pdev)
407{
408 struct mt6397_chip *mt6357 = dev_get_drvdata(dev: pdev->dev.parent);
409 struct regulator_config config = {};
410 struct regulator_dev *rdev;
411 int i;
412
413 pdev->dev.of_node = pdev->dev.parent->of_node;
414
415 for (i = 0; i < MT6357_MAX_REGULATOR; i++) {
416 config.dev = &pdev->dev;
417 config.driver_data = &mt6357_regulators[i];
418 config.regmap = mt6357->regmap;
419
420 rdev = devm_regulator_register(dev: &pdev->dev,
421 regulator_desc: &mt6357_regulators[i].desc,
422 config: &config);
423 if (IS_ERR(ptr: rdev)) {
424 dev_err(&pdev->dev, "failed to register %s\n",
425 mt6357_regulators[i].desc.name);
426 return PTR_ERR(ptr: rdev);
427 }
428 }
429
430 return 0;
431}
432
433static const struct platform_device_id mt6357_platform_ids[] = {
434 { "mt6357-regulator" },
435 { /* sentinel */ },
436};
437MODULE_DEVICE_TABLE(platform, mt6357_platform_ids);
438
439static struct platform_driver mt6357_regulator_driver = {
440 .driver = {
441 .name = "mt6357-regulator",
442 .probe_type = PROBE_PREFER_ASYNCHRONOUS,
443 },
444 .probe = mt6357_regulator_probe,
445 .id_table = mt6357_platform_ids,
446};
447
448module_platform_driver(mt6357_regulator_driver);
449
450MODULE_AUTHOR("Chen Zhong <chen.zhong@mediatek.com>");
451MODULE_AUTHOR("Fabien Parent <fabien.parent@linaro.org>");
452MODULE_AUTHOR("Alexandre Mergnat <amergnat@baylibre.com>");
453MODULE_DESCRIPTION("Regulator Driver for MediaTek MT6357 PMIC");
454MODULE_LICENSE("GPL");
455

source code of linux/drivers/regulator/mt6357-regulator.c