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
;
38 #define MT6397_BUCK(match, vreg, min, max, step, volt_ranges, enreg, \
39 vosel, vosel_mask, voselon, vosel_ctrl, _modeset_reg, \
41 [MT6397_ID_##vreg] = { \
44 .of_match = of_match_ptr(match), \
45 .ops = &mt6397_volt_range_ops, \
46 .type = REGULATOR_VOLTAGE, \
47 .id = MT6397_ID_##vreg, \
48 .owner = THIS_MODULE, \
49 .n_voltages = (max - min)/step + 1, \
50 .linear_ranges = volt_ranges, \
51 .n_linear_ranges = ARRAY_SIZE(volt_ranges), \
53 .vsel_mask = vosel_mask, \
54 .enable_reg = enreg, \
55 .enable_mask = BIT(0), \
56 .of_map_mode = mt6397_map_mode, \
59 .vselon_reg = voselon, \
60 .vselctrl_reg = vosel_ctrl, \
61 .vselctrl_mask = BIT(1), \
62 .modeset_reg = _modeset_reg, \
63 .modeset_mask = BIT(_modeset_shift), \
64 .modeset_shift = _modeset_shift \
67 #define MT6397_LDO(match, vreg, ldo_volt_table, enreg, enbit, vosel, \
69 [MT6397_ID_##vreg] = { \
72 .of_match = of_match_ptr(match), \
73 .ops = &mt6397_volt_table_ops, \
74 .type = REGULATOR_VOLTAGE, \
75 .id = MT6397_ID_##vreg, \
76 .owner = THIS_MODULE, \
77 .n_voltages = ARRAY_SIZE(ldo_volt_table), \
78 .volt_table = ldo_volt_table, \
80 .vsel_mask = vosel_mask, \
81 .enable_reg = enreg, \
82 .enable_mask = BIT(enbit), \
87 #define MT6397_REG_FIXED(match, vreg, enreg, enbit, volt) \
88 [MT6397_ID_##vreg] = { \
91 .of_match = of_match_ptr(match), \
92 .ops = &mt6397_volt_fixed_ops, \
93 .type = REGULATOR_VOLTAGE, \
94 .id = MT6397_ID_##vreg, \
95 .owner = THIS_MODULE, \
97 .enable_reg = enreg, \
98 .enable_mask = BIT(enbit), \
104 static const struct linear_range buck_volt_range1
[] = {
105 REGULATOR_LINEAR_RANGE(700000, 0, 0x7f, 6250),
108 static const struct linear_range buck_volt_range2
[] = {
109 REGULATOR_LINEAR_RANGE(800000, 0, 0x7f, 6250),
112 static const struct linear_range buck_volt_range3
[] = {
113 REGULATOR_LINEAR_RANGE(1500000, 0, 0x1f, 20000),
116 static const unsigned int ldo_volt_table1
[] = {
117 1500000, 1800000, 2500000, 2800000,
120 static const unsigned int ldo_volt_table2
[] = {
124 static const unsigned int ldo_volt_table3
[] = {
128 static const unsigned int ldo_volt_table4
[] = {
129 1220000, 1300000, 1500000, 1800000, 2500000, 2800000, 3000000, 3300000,
132 static const unsigned int ldo_volt_table5
[] = {
133 1200000, 1300000, 1500000, 1800000, 2500000, 2800000, 3000000, 3300000,
136 static const unsigned int ldo_volt_table5_v2
[] = {
137 1200000, 1000000, 1500000, 1800000, 2500000, 2800000, 3000000, 3300000,
140 static const unsigned int ldo_volt_table6
[] = {
141 1200000, 1300000, 1500000, 1800000, 2500000, 2800000, 3000000, 2000000,
144 static const unsigned int ldo_volt_table7
[] = {
145 1300000, 1500000, 1800000, 2000000, 2500000, 2800000, 3000000, 3300000,
148 static unsigned int mt6397_map_mode(unsigned int mode
)
151 case MT6397_BUCK_MODE_AUTO
:
152 return REGULATOR_MODE_NORMAL
;
153 case MT6397_BUCK_MODE_FORCE_PWM
:
154 return REGULATOR_MODE_FAST
;
156 return REGULATOR_MODE_INVALID
;
160 static int mt6397_regulator_set_mode(struct regulator_dev
*rdev
,
163 struct mt6397_regulator_info
*info
= rdev_get_drvdata(rdev
);
167 case REGULATOR_MODE_FAST
:
168 val
= MT6397_BUCK_MODE_FORCE_PWM
;
170 case REGULATOR_MODE_NORMAL
:
171 val
= MT6397_BUCK_MODE_AUTO
;
178 dev_dbg(&rdev
->dev
, "mt6397 buck set_mode %#x, %#x, %#x, %#x\n",
179 info
->modeset_reg
, info
->modeset_mask
,
180 info
->modeset_shift
, val
);
182 val
<<= info
->modeset_shift
;
183 ret
= regmap_update_bits(rdev
->regmap
, info
->modeset_reg
,
184 info
->modeset_mask
, val
);
188 "Failed to set mt6397 buck mode: %d\n", ret
);
195 static unsigned int mt6397_regulator_get_mode(struct regulator_dev
*rdev
)
197 struct mt6397_regulator_info
*info
= rdev_get_drvdata(rdev
);
200 ret
= regmap_read(rdev
->regmap
, info
->modeset_reg
, ®val
);
203 "Failed to get mt6397 buck mode: %d\n", ret
);
207 switch ((regval
& info
->modeset_mask
) >> info
->modeset_shift
) {
208 case MT6397_BUCK_MODE_AUTO
:
209 return REGULATOR_MODE_NORMAL
;
210 case MT6397_BUCK_MODE_FORCE_PWM
:
211 return REGULATOR_MODE_FAST
;
217 static int mt6397_get_status(struct regulator_dev
*rdev
)
221 struct mt6397_regulator_info
*info
= rdev_get_drvdata(rdev
);
223 ret
= regmap_read(rdev
->regmap
, info
->desc
.enable_reg
, ®val
);
225 dev_err(&rdev
->dev
, "Failed to get enable reg: %d\n", ret
);
229 return (regval
& info
->qi
) ? REGULATOR_STATUS_ON
: REGULATOR_STATUS_OFF
;
232 static const struct regulator_ops mt6397_volt_range_ops
= {
233 .list_voltage
= regulator_list_voltage_linear_range
,
234 .map_voltage
= regulator_map_voltage_linear_range
,
235 .set_voltage_sel
= regulator_set_voltage_sel_regmap
,
236 .get_voltage_sel
= regulator_get_voltage_sel_regmap
,
237 .set_voltage_time_sel
= regulator_set_voltage_time_sel
,
238 .enable
= regulator_enable_regmap
,
239 .disable
= regulator_disable_regmap
,
240 .is_enabled
= regulator_is_enabled_regmap
,
241 .get_status
= mt6397_get_status
,
242 .set_mode
= mt6397_regulator_set_mode
,
243 .get_mode
= mt6397_regulator_get_mode
,
246 static const struct regulator_ops mt6397_volt_table_ops
= {
247 .list_voltage
= regulator_list_voltage_table
,
248 .map_voltage
= regulator_map_voltage_iterate
,
249 .set_voltage_sel
= regulator_set_voltage_sel_regmap
,
250 .get_voltage_sel
= regulator_get_voltage_sel_regmap
,
251 .set_voltage_time_sel
= regulator_set_voltage_time_sel
,
252 .enable
= regulator_enable_regmap
,
253 .disable
= regulator_disable_regmap
,
254 .is_enabled
= regulator_is_enabled_regmap
,
255 .get_status
= mt6397_get_status
,
258 static const struct regulator_ops mt6397_volt_fixed_ops
= {
259 .list_voltage
= regulator_list_voltage_linear
,
260 .enable
= regulator_enable_regmap
,
261 .disable
= regulator_disable_regmap
,
262 .is_enabled
= regulator_is_enabled_regmap
,
263 .get_status
= mt6397_get_status
,
266 /* The array is indexed by id(MT6397_ID_XXX) */
267 static struct mt6397_regulator_info mt6397_regulators
[] = {
268 MT6397_BUCK("buck_vpca15", VPCA15
, 700000, 1493750, 6250,
269 buck_volt_range1
, MT6397_VCA15_CON7
, MT6397_VCA15_CON9
, 0x7f,
270 MT6397_VCA15_CON10
, MT6397_VCA15_CON5
, MT6397_VCA15_CON2
, 11),
271 MT6397_BUCK("buck_vpca7", VPCA7
, 700000, 1493750, 6250,
272 buck_volt_range1
, MT6397_VPCA7_CON7
, MT6397_VPCA7_CON9
, 0x7f,
273 MT6397_VPCA7_CON10
, MT6397_VPCA7_CON5
, MT6397_VPCA7_CON2
, 8),
274 MT6397_BUCK("buck_vsramca15", VSRAMCA15
, 700000, 1493750, 6250,
275 buck_volt_range1
, MT6397_VSRMCA15_CON7
, MT6397_VSRMCA15_CON9
,
276 0x7f, MT6397_VSRMCA15_CON10
, MT6397_VSRMCA15_CON5
,
277 MT6397_VSRMCA15_CON2
, 8),
278 MT6397_BUCK("buck_vsramca7", VSRAMCA7
, 700000, 1493750, 6250,
279 buck_volt_range1
, MT6397_VSRMCA7_CON7
, MT6397_VSRMCA7_CON9
,
280 0x7f, MT6397_VSRMCA7_CON10
, MT6397_VSRMCA7_CON5
,
281 MT6397_VSRMCA7_CON2
, 8),
282 MT6397_BUCK("buck_vcore", VCORE
, 700000, 1493750, 6250,
283 buck_volt_range1
, MT6397_VCORE_CON7
, MT6397_VCORE_CON9
, 0x7f,
284 MT6397_VCORE_CON10
, MT6397_VCORE_CON5
, MT6397_VCORE_CON2
, 8),
285 MT6397_BUCK("buck_vgpu", VGPU
, 700000, 1493750, 6250, buck_volt_range1
,
286 MT6397_VGPU_CON7
, MT6397_VGPU_CON9
, 0x7f,
287 MT6397_VGPU_CON10
, MT6397_VGPU_CON5
, MT6397_VGPU_CON2
, 8),
288 MT6397_BUCK("buck_vdrm", VDRM
, 800000, 1593750, 6250, buck_volt_range2
,
289 MT6397_VDRM_CON7
, MT6397_VDRM_CON9
, 0x7f,
290 MT6397_VDRM_CON10
, MT6397_VDRM_CON5
, MT6397_VDRM_CON2
, 8),
291 MT6397_BUCK("buck_vio18", VIO18
, 1500000, 2120000, 20000,
292 buck_volt_range3
, MT6397_VIO18_CON7
, MT6397_VIO18_CON9
, 0x1f,
293 MT6397_VIO18_CON10
, MT6397_VIO18_CON5
, MT6397_VIO18_CON2
, 8),
294 MT6397_REG_FIXED("ldo_vtcxo", VTCXO
, MT6397_ANALDO_CON0
, 10, 2800000),
295 MT6397_REG_FIXED("ldo_va28", VA28
, MT6397_ANALDO_CON1
, 14, 2800000),
296 MT6397_LDO("ldo_vcama", VCAMA
, ldo_volt_table1
,
297 MT6397_ANALDO_CON2
, 15, MT6397_ANALDO_CON6
, 0xC0),
298 MT6397_REG_FIXED("ldo_vio28", VIO28
, MT6397_DIGLDO_CON0
, 14, 2800000),
299 MT6397_REG_FIXED("ldo_vusb", VUSB
, MT6397_DIGLDO_CON1
, 14, 3300000),
300 MT6397_LDO("ldo_vmc", VMC
, ldo_volt_table2
,
301 MT6397_DIGLDO_CON2
, 12, MT6397_DIGLDO_CON29
, 0x10),
302 MT6397_LDO("ldo_vmch", VMCH
, ldo_volt_table3
,
303 MT6397_DIGLDO_CON3
, 14, MT6397_DIGLDO_CON17
, 0x80),
304 MT6397_LDO("ldo_vemc3v3", VEMC3V3
, ldo_volt_table3
,
305 MT6397_DIGLDO_CON4
, 14, MT6397_DIGLDO_CON18
, 0x10),
306 MT6397_LDO("ldo_vgp1", VGP1
, ldo_volt_table4
,
307 MT6397_DIGLDO_CON5
, 15, MT6397_DIGLDO_CON19
, 0xE0),
308 MT6397_LDO("ldo_vgp2", VGP2
, ldo_volt_table5
,
309 MT6397_DIGLDO_CON6
, 15, MT6397_DIGLDO_CON20
, 0xE0),
310 MT6397_LDO("ldo_vgp3", VGP3
, ldo_volt_table5
,
311 MT6397_DIGLDO_CON7
, 15, MT6397_DIGLDO_CON21
, 0xE0),
312 MT6397_LDO("ldo_vgp4", VGP4
, ldo_volt_table5
,
313 MT6397_DIGLDO_CON8
, 15, MT6397_DIGLDO_CON22
, 0xE0),
314 MT6397_LDO("ldo_vgp5", VGP5
, ldo_volt_table6
,
315 MT6397_DIGLDO_CON9
, 15, MT6397_DIGLDO_CON23
, 0xE0),
316 MT6397_LDO("ldo_vgp6", VGP6
, ldo_volt_table5
,
317 MT6397_DIGLDO_CON10
, 15, MT6397_DIGLDO_CON33
, 0xE0),
318 MT6397_LDO("ldo_vibr", VIBR
, ldo_volt_table7
,
319 MT6397_DIGLDO_CON24
, 15, MT6397_DIGLDO_CON25
, 0xE00),
322 static int mt6397_set_buck_vosel_reg(struct platform_device
*pdev
)
324 struct mt6397_chip
*mt6397
= dev_get_drvdata(pdev
->dev
.parent
);
328 for (i
= 0; i
< MT6397_MAX_REGULATOR
; i
++) {
329 if (mt6397_regulators
[i
].vselctrl_reg
) {
330 if (regmap_read(mt6397
->regmap
,
331 mt6397_regulators
[i
].vselctrl_reg
,
334 "Failed to read buck ctrl\n");
338 if (regval
& mt6397_regulators
[i
].vselctrl_mask
) {
339 mt6397_regulators
[i
].desc
.vsel_reg
=
340 mt6397_regulators
[i
].vselon_reg
;
348 static int mt6397_regulator_probe(struct platform_device
*pdev
)
350 struct mt6397_chip
*mt6397
= dev_get_drvdata(pdev
->dev
.parent
);
351 struct regulator_config config
= {};
352 struct regulator_dev
*rdev
;
354 u32 reg_value
, version
;
356 /* Query buck controller to select activated voltage register part */
357 if (mt6397_set_buck_vosel_reg(pdev
))
360 /* Read PMIC chip revision to update constraints and voltage table */
361 if (regmap_read(mt6397
->regmap
, MT6397_CID
, ®_value
) < 0) {
362 dev_err(&pdev
->dev
, "Failed to read Chip ID\n");
365 dev_info(&pdev
->dev
, "Chip ID = 0x%x\n", reg_value
);
367 version
= (reg_value
& 0xFF);
369 case MT6397_REGULATOR_ID91
:
370 mt6397_regulators
[MT6397_ID_VGP2
].desc
.volt_table
=
377 for (i
= 0; i
< MT6397_MAX_REGULATOR
; i
++) {
378 config
.dev
= &pdev
->dev
;
379 config
.driver_data
= &mt6397_regulators
[i
];
380 config
.regmap
= mt6397
->regmap
;
381 rdev
= devm_regulator_register(&pdev
->dev
,
382 &mt6397_regulators
[i
].desc
, &config
);
384 dev_err(&pdev
->dev
, "failed to register %s\n",
385 mt6397_regulators
[i
].desc
.name
);
386 return PTR_ERR(rdev
);
393 static const struct platform_device_id mt6397_platform_ids
[] = {
394 {"mt6397-regulator", 0},
397 MODULE_DEVICE_TABLE(platform
, mt6397_platform_ids
);
399 static const struct of_device_id mt6397_of_match
[] = {
400 { .compatible
= "mediatek,mt6397-regulator", },
403 MODULE_DEVICE_TABLE(of
, mt6397_of_match
);
405 static struct platform_driver mt6397_regulator_driver
= {
407 .name
= "mt6397-regulator",
408 .of_match_table
= of_match_ptr(mt6397_of_match
),
410 .probe
= mt6397_regulator_probe
,
411 .id_table
= mt6397_platform_ids
,
414 module_platform_driver(mt6397_regulator_driver
);
416 MODULE_AUTHOR("Flora Fu <flora.fu@mediatek.com>");
417 MODULE_DESCRIPTION("Regulator Driver for MediaTek MT6397 PMIC");
418 MODULE_LICENSE("GPL");