1 // SPDX-License-Identifier: GPL-2.0
3 // Copyright (c) 2014 MediaTek Inc.
4 // Author: Flora Fu <flora.fu@mediatek.com>
6 #include <linux/module.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>
19 * MT6397 regulators' information
21 * @desc: standard fields of regulator description.
22 * @qi: Mask for query enable signal status of regulators
23 * @vselon_reg: Register sections for hardware control mode of bucks
24 * @vselctrl_reg: Register for controlling the buck control mode.
25 * @vselctrl_mask: Mask for query buck's voltage control mode.
27 struct mt6397_regulator_info
{
28 struct regulator_desc desc
;
37 #define MT6397_BUCK(match, vreg, min, max, step, volt_ranges, enreg, \
38 vosel, vosel_mask, voselon, vosel_ctrl, _modeset_reg, \
40 [MT6397_ID_##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), \
52 .vsel_mask = vosel_mask, \
53 .enable_reg = enreg, \
54 .enable_mask = BIT(0), \
55 .of_map_mode = mt6397_map_mode, \
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), \
65 #define MT6397_LDO(match, vreg, ldo_volt_table, enreg, enbit, vosel, \
67 [MT6397_ID_##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, \
78 .vsel_mask = vosel_mask, \
79 .enable_reg = enreg, \
80 .enable_mask = BIT(enbit), \
85 #define MT6397_REG_FIXED(match, vreg, enreg, enbit, volt) \
86 [MT6397_ID_##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, \
95 .enable_reg = enreg, \
96 .enable_mask = BIT(enbit), \
102 static const struct linear_range buck_volt_range1
[] = {
103 REGULATOR_LINEAR_RANGE(700000, 0, 0x7f, 6250),
106 static const struct linear_range buck_volt_range2
[] = {
107 REGULATOR_LINEAR_RANGE(800000, 0, 0x7f, 6250),
110 static const struct linear_range buck_volt_range3
[] = {
111 REGULATOR_LINEAR_RANGE(1500000, 0, 0x1f, 20000),
114 static const unsigned int ldo_volt_table1
[] = {
115 1500000, 1800000, 2500000, 2800000,
118 static const unsigned int ldo_volt_table2
[] = {
122 static const unsigned int ldo_volt_table3
[] = {
126 static const unsigned int ldo_volt_table4
[] = {
127 1220000, 1300000, 1500000, 1800000, 2500000, 2800000, 3000000, 3300000,
130 static const unsigned int ldo_volt_table5
[] = {
131 1200000, 1300000, 1500000, 1800000, 2500000, 2800000, 3000000, 3300000,
134 static const unsigned int ldo_volt_table5_v2
[] = {
135 1200000, 1000000, 1500000, 1800000, 2500000, 2800000, 3000000, 3300000,
138 static const unsigned int ldo_volt_table6
[] = {
139 1200000, 1300000, 1500000, 1800000, 2500000, 2800000, 3000000, 2000000,
142 static const unsigned int ldo_volt_table7
[] = {
143 1300000, 1500000, 1800000, 2000000, 2500000, 2800000, 3000000, 3300000,
146 static unsigned int mt6397_map_mode(unsigned int mode
)
149 case MT6397_BUCK_MODE_AUTO
:
150 return REGULATOR_MODE_NORMAL
;
151 case MT6397_BUCK_MODE_FORCE_PWM
:
152 return REGULATOR_MODE_FAST
;
154 return REGULATOR_MODE_INVALID
;
158 static int mt6397_regulator_set_mode(struct regulator_dev
*rdev
,
161 struct mt6397_regulator_info
*info
= rdev_get_drvdata(rdev
);
165 case REGULATOR_MODE_FAST
:
166 val
= MT6397_BUCK_MODE_FORCE_PWM
;
168 case REGULATOR_MODE_NORMAL
:
169 val
= MT6397_BUCK_MODE_AUTO
;
176 dev_dbg(&rdev
->dev
, "mt6397 buck set_mode %#x, %#x, %#x\n",
177 info
->modeset_reg
, info
->modeset_mask
, val
);
179 val
<<= ffs(info
->modeset_mask
) - 1;
181 ret
= regmap_update_bits(rdev
->regmap
, info
->modeset_reg
,
182 info
->modeset_mask
, val
);
186 "Failed to set mt6397 buck mode: %d\n", ret
);
193 static unsigned int mt6397_regulator_get_mode(struct regulator_dev
*rdev
)
195 struct mt6397_regulator_info
*info
= rdev_get_drvdata(rdev
);
198 ret
= regmap_read(rdev
->regmap
, info
->modeset_reg
, ®val
);
201 "Failed to get mt6397 buck mode: %d\n", ret
);
205 regval
&= info
->modeset_mask
;
206 regval
>>= ffs(info
->modeset_mask
) - 1;
209 case MT6397_BUCK_MODE_AUTO
:
210 return REGULATOR_MODE_NORMAL
;
211 case MT6397_BUCK_MODE_FORCE_PWM
:
212 return REGULATOR_MODE_FAST
;
218 static int mt6397_get_status(struct regulator_dev
*rdev
)
222 struct mt6397_regulator_info
*info
= rdev_get_drvdata(rdev
);
224 ret
= regmap_read(rdev
->regmap
, info
->desc
.enable_reg
, ®val
);
226 dev_err(&rdev
->dev
, "Failed to get enable reg: %d\n", ret
);
230 return (regval
& info
->qi
) ? REGULATOR_STATUS_ON
: REGULATOR_STATUS_OFF
;
233 static 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
,
247 static 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
,
259 static 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
,
267 /* The array is indexed by id(MT6397_ID_XXX) */
268 static 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),
323 static int mt6397_set_buck_vosel_reg(struct platform_device
*pdev
)
325 struct mt6397_chip
*mt6397
= dev_get_drvdata(pdev
->dev
.parent
);
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
,
335 "Failed to read buck ctrl\n");
339 if (regval
& mt6397_regulators
[i
].vselctrl_mask
) {
340 mt6397_regulators
[i
].desc
.vsel_reg
=
341 mt6397_regulators
[i
].vselon_reg
;
349 static int mt6397_regulator_probe(struct platform_device
*pdev
)
351 struct mt6397_chip
*mt6397
= dev_get_drvdata(pdev
->dev
.parent
);
352 struct regulator_config config
= {};
353 struct regulator_dev
*rdev
;
355 u32 reg_value
, version
;
357 /* Query buck controller to select activated voltage register part */
358 if (mt6397_set_buck_vosel_reg(pdev
))
361 /* Read PMIC chip revision to update constraints and voltage table */
362 if (regmap_read(mt6397
->regmap
, MT6397_CID
, ®_value
) < 0) {
363 dev_err(&pdev
->dev
, "Failed to read Chip ID\n");
366 dev_info(&pdev
->dev
, "Chip ID = 0x%x\n", reg_value
);
368 version
= (reg_value
& 0xFF);
370 case MT6397_REGULATOR_ID91
:
371 mt6397_regulators
[MT6397_ID_VGP2
].desc
.volt_table
=
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
);
385 dev_err(&pdev
->dev
, "failed to register %s\n",
386 mt6397_regulators
[i
].desc
.name
);
387 return PTR_ERR(rdev
);
394 static const struct platform_device_id mt6397_platform_ids
[] = {
395 {"mt6397-regulator", 0},
398 MODULE_DEVICE_TABLE(platform
, mt6397_platform_ids
);
400 static const struct of_device_id mt6397_of_match
[] = {
401 { .compatible
= "mediatek,mt6397-regulator", },
404 MODULE_DEVICE_TABLE(of
, mt6397_of_match
);
406 static struct platform_driver mt6397_regulator_driver
= {
408 .name
= "mt6397-regulator",
409 .of_match_table
= of_match_ptr(mt6397_of_match
),
411 .probe
= mt6397_regulator_probe
,
412 .id_table
= mt6397_platform_ids
,
415 module_platform_driver(mt6397_regulator_driver
);
417 MODULE_AUTHOR("Flora Fu <flora.fu@mediatek.com>");
418 MODULE_DESCRIPTION("Regulator Driver for MediaTek MT6397 PMIC");
419 MODULE_LICENSE("GPL");