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 | */ |
30 | struct 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_vsel operation. |
127 | */ |
128 | static 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: ®val); |
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 | |
147 | static 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 | |
158 | static 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 | |
169 | static 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 | |
176 | static const int vxo22_voltages[] = { |
177 | 2200000, |
178 | 0, |
179 | 2400000, |
180 | }; |
181 | |
182 | static 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 | |
199 | static const int vcn33_voltages[] = { |
200 | 0, |
201 | 3300000, |
202 | 3400000, |
203 | 3500000, |
204 | }; |
205 | |
206 | static 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 | |
220 | static 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 | |
236 | static const int vldo28_voltages[] = { |
237 | 0, |
238 | 2800000, |
239 | 0, |
240 | 3000000, |
241 | }; |
242 | |
243 | static const int vdram_voltages[] = { |
244 | 0, |
245 | 1100000, |
246 | 1200000, |
247 | }; |
248 | |
249 | static 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 | |
265 | static 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 | |
282 | static 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 | |
299 | static const int vmch_voltages[] = { |
300 | 0, |
301 | 0, |
302 | 2900000, |
303 | 3000000, |
304 | 0, |
305 | 3300000, |
306 | }; |
307 | |
308 | static const int vemc_voltages[] = { |
309 | 0, |
310 | 0, |
311 | 2900000, |
312 | 3000000, |
313 | 0, |
314 | 3300000, |
315 | }; |
316 | |
317 | static const int vusb_voltages[] = { |
318 | 0, |
319 | 0, |
320 | 0, |
321 | 3000000, |
322 | 3100000, |
323 | }; |
324 | |
325 | static const struct linear_range buck_volt_range1[] = { |
326 | REGULATOR_LINEAR_RANGE(518750, 0, 0x7f, 6250), |
327 | }; |
328 | |
329 | static const struct linear_range buck_volt_range2[] = { |
330 | REGULATOR_LINEAR_RANGE(500000, 0, 0x7f, 6250), |
331 | }; |
332 | |
333 | static const struct linear_range buck_volt_range3[] = { |
334 | REGULATOR_LINEAR_RANGE(500000, 0, 0x3f, 50000), |
335 | }; |
336 | |
337 | static 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) */ |
342 | static 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 | |
406 | static 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 | |
433 | static const struct platform_device_id mt6357_platform_ids[] = { |
434 | { "mt6357-regulator" }, |
435 | { /* sentinel */ }, |
436 | }; |
437 | MODULE_DEVICE_TABLE(platform, mt6357_platform_ids); |
438 | |
439 | static 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 | |
448 | module_platform_driver(mt6357_regulator_driver); |
449 | |
450 | MODULE_AUTHOR("Chen Zhong <chen.zhong@mediatek.com>" ); |
451 | MODULE_AUTHOR("Fabien Parent <fabien.parent@linaro.org>" ); |
452 | MODULE_AUTHOR("Alexandre Mergnat <amergnat@baylibre.com>" ); |
453 | MODULE_DESCRIPTION("Regulator Driver for MediaTek MT6357 PMIC" ); |
454 | MODULE_LICENSE("GPL" ); |
455 | |