1 // SPDX-License-Identifier: GPL-2.0+
2 //
3 // Copyright (c) 2011 Samsung Electronics Co., Ltd
4 // http://www.samsung.com
5
6 #include <linux/err.h>
7 #include <linux/of_gpio.h>
8 #include <linux/gpio/consumer.h>
9 #include <linux/module.h>
10 #include <linux/platform_device.h>
11 #include <linux/regulator/driver.h>
12 #include <linux/regulator/machine.h>
13 #include <linux/mfd/samsung/core.h>
14 #include <linux/mfd/samsung/s5m8767.h>
15 #include <linux/regulator/of_regulator.h>
16 #include <linux/regmap.h>
17
18 #define S5M8767_OPMODE_NORMAL_MODE 0x1
19
20 struct s5m8767_info {
21 struct device *dev;
22 struct sec_pmic_dev *iodev;
23 int num_regulators;
24 struct sec_opmode_data *opmode;
25
26 int ramp_delay;
27 bool buck2_ramp;
28 bool buck3_ramp;
29 bool buck4_ramp;
30
31 bool buck2_gpiodvs;
32 bool buck3_gpiodvs;
33 bool buck4_gpiodvs;
34 u8 buck2_vol[8];
35 u8 buck3_vol[8];
36 u8 buck4_vol[8];
37 int buck_gpios[3];
38 int buck_ds[3];
39 int buck_gpioindex;
40 };
41
42 struct sec_voltage_desc {
43 int max;
44 int min;
45 int step;
46 };
47
48 static const struct sec_voltage_desc buck_voltage_val1 = {
49 .max = 2225000,
50 .min = 650000,
51 .step = 6250,
52 };
53
54 static const struct sec_voltage_desc buck_voltage_val2 = {
55 .max = 1600000,
56 .min = 600000,
57 .step = 6250,
58 };
59
60 static const struct sec_voltage_desc buck_voltage_val3 = {
61 .max = 3000000,
62 .min = 750000,
63 .step = 12500,
64 };
65
66 static const struct sec_voltage_desc ldo_voltage_val1 = {
67 .max = 3950000,
68 .min = 800000,
69 .step = 50000,
70 };
71
72 static const struct sec_voltage_desc ldo_voltage_val2 = {
73 .max = 2375000,
74 .min = 800000,
75 .step = 25000,
76 };
77
78 static const struct sec_voltage_desc *reg_voltage_map[] = {
79 [S5M8767_LDO1] = &ldo_voltage_val2,
80 [S5M8767_LDO2] = &ldo_voltage_val2,
81 [S5M8767_LDO3] = &ldo_voltage_val1,
82 [S5M8767_LDO4] = &ldo_voltage_val1,
83 [S5M8767_LDO5] = &ldo_voltage_val1,
84 [S5M8767_LDO6] = &ldo_voltage_val2,
85 [S5M8767_LDO7] = &ldo_voltage_val2,
86 [S5M8767_LDO8] = &ldo_voltage_val2,
87 [S5M8767_LDO9] = &ldo_voltage_val1,
88 [S5M8767_LDO10] = &ldo_voltage_val1,
89 [S5M8767_LDO11] = &ldo_voltage_val1,
90 [S5M8767_LDO12] = &ldo_voltage_val1,
91 [S5M8767_LDO13] = &ldo_voltage_val1,
92 [S5M8767_LDO14] = &ldo_voltage_val1,
93 [S5M8767_LDO15] = &ldo_voltage_val2,
94 [S5M8767_LDO16] = &ldo_voltage_val1,
95 [S5M8767_LDO17] = &ldo_voltage_val1,
96 [S5M8767_LDO18] = &ldo_voltage_val1,
97 [S5M8767_LDO19] = &ldo_voltage_val1,
98 [S5M8767_LDO20] = &ldo_voltage_val1,
99 [S5M8767_LDO21] = &ldo_voltage_val1,
100 [S5M8767_LDO22] = &ldo_voltage_val1,
101 [S5M8767_LDO23] = &ldo_voltage_val1,
102 [S5M8767_LDO24] = &ldo_voltage_val1,
103 [S5M8767_LDO25] = &ldo_voltage_val1,
104 [S5M8767_LDO26] = &ldo_voltage_val1,
105 [S5M8767_LDO27] = &ldo_voltage_val1,
106 [S5M8767_LDO28] = &ldo_voltage_val1,
107 [S5M8767_BUCK1] = &buck_voltage_val1,
108 [S5M8767_BUCK2] = &buck_voltage_val2,
109 [S5M8767_BUCK3] = &buck_voltage_val2,
110 [S5M8767_BUCK4] = &buck_voltage_val2,
111 [S5M8767_BUCK5] = &buck_voltage_val1,
112 [S5M8767_BUCK6] = &buck_voltage_val1,
113 [S5M8767_BUCK7] = &buck_voltage_val3,
114 [S5M8767_BUCK8] = &buck_voltage_val3,
115 [S5M8767_BUCK9] = &buck_voltage_val3,
116 };
117
118 static unsigned int s5m8767_opmode_reg[][4] = {
119 /* {OFF, ON, LOWPOWER, SUSPEND} */
120 /* LDO1 ... LDO28 */
121 {0x0, 0x3, 0x2, 0x1}, /* LDO1 */
122 {0x0, 0x3, 0x2, 0x1},
123 {0x0, 0x3, 0x2, 0x1},
124 {0x0, 0x0, 0x0, 0x0},
125 {0x0, 0x3, 0x2, 0x1}, /* LDO5 */
126 {0x0, 0x3, 0x2, 0x1},
127 {0x0, 0x3, 0x2, 0x1},
128 {0x0, 0x3, 0x2, 0x1},
129 {0x0, 0x3, 0x2, 0x1},
130 {0x0, 0x3, 0x2, 0x1}, /* LDO10 */
131 {0x0, 0x3, 0x2, 0x1},
132 {0x0, 0x3, 0x2, 0x1},
133 {0x0, 0x3, 0x2, 0x1},
134 {0x0, 0x3, 0x2, 0x1},
135 {0x0, 0x3, 0x2, 0x1}, /* LDO15 */
136 {0x0, 0x3, 0x2, 0x1},
137 {0x0, 0x3, 0x2, 0x1},
138 {0x0, 0x0, 0x0, 0x0},
139 {0x0, 0x3, 0x2, 0x1},
140 {0x0, 0x3, 0x2, 0x1}, /* LDO20 */
141 {0x0, 0x3, 0x2, 0x1},
142 {0x0, 0x3, 0x2, 0x1},
143 {0x0, 0x0, 0x0, 0x0},
144 {0x0, 0x3, 0x2, 0x1},
145 {0x0, 0x3, 0x2, 0x1}, /* LDO25 */
146 {0x0, 0x3, 0x2, 0x1},
147 {0x0, 0x3, 0x2, 0x1},
148 {0x0, 0x3, 0x2, 0x1}, /* LDO28 */
149
150 /* BUCK1 ... BUCK9 */
151 {0x0, 0x3, 0x1, 0x1}, /* BUCK1 */
152 {0x0, 0x3, 0x1, 0x1},
153 {0x0, 0x3, 0x1, 0x1},
154 {0x0, 0x3, 0x1, 0x1},
155 {0x0, 0x3, 0x2, 0x1}, /* BUCK5 */
156 {0x0, 0x3, 0x1, 0x1},
157 {0x0, 0x3, 0x1, 0x1},
158 {0x0, 0x3, 0x1, 0x1},
159 {0x0, 0x3, 0x1, 0x1}, /* BUCK9 */
160 };
161
s5m8767_get_register(struct s5m8767_info * s5m8767,int reg_id,int * reg,int * enable_ctrl)162 static int s5m8767_get_register(struct s5m8767_info *s5m8767, int reg_id,
163 int *reg, int *enable_ctrl)
164 {
165 int i;
166 unsigned int mode;
167
168 switch (reg_id) {
169 case S5M8767_LDO1 ... S5M8767_LDO2:
170 *reg = S5M8767_REG_LDO1CTRL + (reg_id - S5M8767_LDO1);
171 break;
172 case S5M8767_LDO3 ... S5M8767_LDO28:
173 *reg = S5M8767_REG_LDO3CTRL + (reg_id - S5M8767_LDO3);
174 break;
175 case S5M8767_BUCK1:
176 *reg = S5M8767_REG_BUCK1CTRL1;
177 break;
178 case S5M8767_BUCK2 ... S5M8767_BUCK4:
179 *reg = S5M8767_REG_BUCK2CTRL + (reg_id - S5M8767_BUCK2) * 9;
180 break;
181 case S5M8767_BUCK5:
182 *reg = S5M8767_REG_BUCK5CTRL1;
183 break;
184 case S5M8767_BUCK6 ... S5M8767_BUCK9:
185 *reg = S5M8767_REG_BUCK6CTRL1 + (reg_id - S5M8767_BUCK6) * 2;
186 break;
187 default:
188 return -EINVAL;
189 }
190
191 for (i = 0; i < s5m8767->num_regulators; i++) {
192 if (s5m8767->opmode[i].id == reg_id) {
193 mode = s5m8767->opmode[i].mode;
194 break;
195 }
196 }
197
198 if (i >= s5m8767->num_regulators)
199 return -EINVAL;
200
201 *enable_ctrl = s5m8767_opmode_reg[reg_id][mode] << S5M8767_ENCTRL_SHIFT;
202
203 return 0;
204 }
205
s5m8767_get_vsel_reg(int reg_id,struct s5m8767_info * s5m8767)206 static int s5m8767_get_vsel_reg(int reg_id, struct s5m8767_info *s5m8767)
207 {
208 int reg;
209
210 switch (reg_id) {
211 case S5M8767_LDO1 ... S5M8767_LDO2:
212 reg = S5M8767_REG_LDO1CTRL + (reg_id - S5M8767_LDO1);
213 break;
214 case S5M8767_LDO3 ... S5M8767_LDO28:
215 reg = S5M8767_REG_LDO3CTRL + (reg_id - S5M8767_LDO3);
216 break;
217 case S5M8767_BUCK1:
218 reg = S5M8767_REG_BUCK1CTRL2;
219 break;
220 case S5M8767_BUCK2:
221 reg = S5M8767_REG_BUCK2DVS1;
222 if (s5m8767->buck2_gpiodvs)
223 reg += s5m8767->buck_gpioindex;
224 break;
225 case S5M8767_BUCK3:
226 reg = S5M8767_REG_BUCK3DVS1;
227 if (s5m8767->buck3_gpiodvs)
228 reg += s5m8767->buck_gpioindex;
229 break;
230 case S5M8767_BUCK4:
231 reg = S5M8767_REG_BUCK4DVS1;
232 if (s5m8767->buck4_gpiodvs)
233 reg += s5m8767->buck_gpioindex;
234 break;
235 case S5M8767_BUCK5:
236 reg = S5M8767_REG_BUCK5CTRL2;
237 break;
238 case S5M8767_BUCK6 ... S5M8767_BUCK9:
239 reg = S5M8767_REG_BUCK6CTRL2 + (reg_id - S5M8767_BUCK6) * 2;
240 break;
241 default:
242 return -EINVAL;
243 }
244
245 return reg;
246 }
247
s5m8767_convert_voltage_to_sel(const struct sec_voltage_desc * desc,int min_vol)248 static int s5m8767_convert_voltage_to_sel(const struct sec_voltage_desc *desc,
249 int min_vol)
250 {
251 int selector = 0;
252
253 if (desc == NULL)
254 return -EINVAL;
255
256 if (min_vol > desc->max)
257 return -EINVAL;
258
259 if (min_vol < desc->min)
260 min_vol = desc->min;
261
262 selector = DIV_ROUND_UP(min_vol - desc->min, desc->step);
263
264 if (desc->min + desc->step * selector > desc->max)
265 return -EINVAL;
266
267 return selector;
268 }
269
s5m8767_set_high(struct s5m8767_info * s5m8767)270 static inline int s5m8767_set_high(struct s5m8767_info *s5m8767)
271 {
272 int temp_index = s5m8767->buck_gpioindex;
273
274 gpio_set_value(s5m8767->buck_gpios[0], (temp_index >> 2) & 0x1);
275 gpio_set_value(s5m8767->buck_gpios[1], (temp_index >> 1) & 0x1);
276 gpio_set_value(s5m8767->buck_gpios[2], temp_index & 0x1);
277
278 return 0;
279 }
280
s5m8767_set_low(struct s5m8767_info * s5m8767)281 static inline int s5m8767_set_low(struct s5m8767_info *s5m8767)
282 {
283 int temp_index = s5m8767->buck_gpioindex;
284
285 gpio_set_value(s5m8767->buck_gpios[2], temp_index & 0x1);
286 gpio_set_value(s5m8767->buck_gpios[1], (temp_index >> 1) & 0x1);
287 gpio_set_value(s5m8767->buck_gpios[0], (temp_index >> 2) & 0x1);
288
289 return 0;
290 }
291
s5m8767_set_voltage_sel(struct regulator_dev * rdev,unsigned selector)292 static int s5m8767_set_voltage_sel(struct regulator_dev *rdev,
293 unsigned selector)
294 {
295 struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
296 int reg_id = rdev_get_id(rdev);
297 int old_index, index = 0;
298 u8 *buck234_vol = NULL;
299
300 switch (reg_id) {
301 case S5M8767_LDO1 ... S5M8767_LDO28:
302 break;
303 case S5M8767_BUCK1 ... S5M8767_BUCK6:
304 if (reg_id == S5M8767_BUCK2 && s5m8767->buck2_gpiodvs)
305 buck234_vol = &s5m8767->buck2_vol[0];
306 else if (reg_id == S5M8767_BUCK3 && s5m8767->buck3_gpiodvs)
307 buck234_vol = &s5m8767->buck3_vol[0];
308 else if (reg_id == S5M8767_BUCK4 && s5m8767->buck4_gpiodvs)
309 buck234_vol = &s5m8767->buck4_vol[0];
310 break;
311 case S5M8767_BUCK7 ... S5M8767_BUCK8:
312 return -EINVAL;
313 case S5M8767_BUCK9:
314 break;
315 default:
316 return -EINVAL;
317 }
318
319 /* buck234_vol != NULL means to control buck234 voltage via DVS GPIO */
320 if (buck234_vol) {
321 while (*buck234_vol != selector) {
322 buck234_vol++;
323 index++;
324 }
325 old_index = s5m8767->buck_gpioindex;
326 s5m8767->buck_gpioindex = index;
327
328 if (index > old_index)
329 return s5m8767_set_high(s5m8767);
330 else
331 return s5m8767_set_low(s5m8767);
332 } else {
333 return regulator_set_voltage_sel_regmap(rdev, selector);
334 }
335 }
336
s5m8767_set_voltage_time_sel(struct regulator_dev * rdev,unsigned int old_sel,unsigned int new_sel)337 static int s5m8767_set_voltage_time_sel(struct regulator_dev *rdev,
338 unsigned int old_sel,
339 unsigned int new_sel)
340 {
341 struct s5m8767_info *s5m8767 = rdev_get_drvdata(rdev);
342 const struct sec_voltage_desc *desc;
343 int reg_id = rdev_get_id(rdev);
344
345 desc = reg_voltage_map[reg_id];
346
347 if ((old_sel < new_sel) && s5m8767->ramp_delay)
348 return DIV_ROUND_UP(desc->step * (new_sel - old_sel),
349 s5m8767->ramp_delay * 1000);
350 return 0;
351 }
352
353 static const struct regulator_ops s5m8767_ops = {
354 .list_voltage = regulator_list_voltage_linear,
355 .is_enabled = regulator_is_enabled_regmap,
356 .enable = regulator_enable_regmap,
357 .disable = regulator_disable_regmap,
358 .get_voltage_sel = regulator_get_voltage_sel_regmap,
359 .set_voltage_sel = s5m8767_set_voltage_sel,
360 .set_voltage_time_sel = s5m8767_set_voltage_time_sel,
361 };
362
363 static const struct regulator_ops s5m8767_buck78_ops = {
364 .list_voltage = regulator_list_voltage_linear,
365 .is_enabled = regulator_is_enabled_regmap,
366 .enable = regulator_enable_regmap,
367 .disable = regulator_disable_regmap,
368 .get_voltage_sel = regulator_get_voltage_sel_regmap,
369 .set_voltage_sel = regulator_set_voltage_sel_regmap,
370 };
371
372 #define s5m8767_regulator_desc(_name) { \
373 .name = #_name, \
374 .id = S5M8767_##_name, \
375 .ops = &s5m8767_ops, \
376 .type = REGULATOR_VOLTAGE, \
377 .owner = THIS_MODULE, \
378 }
379
380 #define s5m8767_regulator_buck78_desc(_name) { \
381 .name = #_name, \
382 .id = S5M8767_##_name, \
383 .ops = &s5m8767_buck78_ops, \
384 .type = REGULATOR_VOLTAGE, \
385 .owner = THIS_MODULE, \
386 }
387
388 static struct regulator_desc regulators[] = {
389 s5m8767_regulator_desc(LDO1),
390 s5m8767_regulator_desc(LDO2),
391 s5m8767_regulator_desc(LDO3),
392 s5m8767_regulator_desc(LDO4),
393 s5m8767_regulator_desc(LDO5),
394 s5m8767_regulator_desc(LDO6),
395 s5m8767_regulator_desc(LDO7),
396 s5m8767_regulator_desc(LDO8),
397 s5m8767_regulator_desc(LDO9),
398 s5m8767_regulator_desc(LDO10),
399 s5m8767_regulator_desc(LDO11),
400 s5m8767_regulator_desc(LDO12),
401 s5m8767_regulator_desc(LDO13),
402 s5m8767_regulator_desc(LDO14),
403 s5m8767_regulator_desc(LDO15),
404 s5m8767_regulator_desc(LDO16),
405 s5m8767_regulator_desc(LDO17),
406 s5m8767_regulator_desc(LDO18),
407 s5m8767_regulator_desc(LDO19),
408 s5m8767_regulator_desc(LDO20),
409 s5m8767_regulator_desc(LDO21),
410 s5m8767_regulator_desc(LDO22),
411 s5m8767_regulator_desc(LDO23),
412 s5m8767_regulator_desc(LDO24),
413 s5m8767_regulator_desc(LDO25),
414 s5m8767_regulator_desc(LDO26),
415 s5m8767_regulator_desc(LDO27),
416 s5m8767_regulator_desc(LDO28),
417 s5m8767_regulator_desc(BUCK1),
418 s5m8767_regulator_desc(BUCK2),
419 s5m8767_regulator_desc(BUCK3),
420 s5m8767_regulator_desc(BUCK4),
421 s5m8767_regulator_desc(BUCK5),
422 s5m8767_regulator_desc(BUCK6),
423 s5m8767_regulator_buck78_desc(BUCK7),
424 s5m8767_regulator_buck78_desc(BUCK8),
425 s5m8767_regulator_desc(BUCK9),
426 };
427
428 /*
429 * Enable GPIO control over BUCK9 in regulator_config for that regulator.
430 */
s5m8767_regulator_config_ext_control(struct s5m8767_info * s5m8767,struct sec_regulator_data * rdata,struct regulator_config * config)431 static void s5m8767_regulator_config_ext_control(struct s5m8767_info *s5m8767,
432 struct sec_regulator_data *rdata,
433 struct regulator_config *config)
434 {
435 int i, mode = 0;
436
437 if (rdata->id != S5M8767_BUCK9)
438 return;
439
440 /* Check if opmode for regulator matches S5M8767_ENCTRL_USE_GPIO */
441 for (i = 0; i < s5m8767->num_regulators; i++) {
442 const struct sec_opmode_data *opmode = &s5m8767->opmode[i];
443 if (opmode->id == rdata->id) {
444 mode = s5m8767_opmode_reg[rdata->id][opmode->mode];
445 break;
446 }
447 }
448 if (mode != S5M8767_ENCTRL_USE_GPIO) {
449 dev_warn(s5m8767->dev,
450 "ext-control for %s: mismatched op_mode (%x), ignoring\n",
451 rdata->reg_node->name, mode);
452 return;
453 }
454
455 if (!rdata->ext_control_gpiod) {
456 dev_warn(s5m8767->dev,
457 "ext-control for %s: GPIO not valid, ignoring\n",
458 rdata->reg_node->name);
459 return;
460 }
461
462 config->ena_gpiod = rdata->ext_control_gpiod;
463 }
464
465 /*
466 * Turn on GPIO control over BUCK9.
467 */
s5m8767_enable_ext_control(struct s5m8767_info * s5m8767,struct regulator_dev * rdev)468 static int s5m8767_enable_ext_control(struct s5m8767_info *s5m8767,
469 struct regulator_dev *rdev)
470 {
471 int id = rdev_get_id(rdev);
472 int ret, reg, enable_ctrl;
473
474 if (id != S5M8767_BUCK9)
475 return -EINVAL;
476
477 ret = s5m8767_get_register(s5m8767, id, ®, &enable_ctrl);
478 if (ret)
479 return ret;
480
481 return regmap_update_bits(s5m8767->iodev->regmap_pmic,
482 reg, S5M8767_ENCTRL_MASK,
483 S5M8767_ENCTRL_USE_GPIO << S5M8767_ENCTRL_SHIFT);
484 }
485
486
487 #ifdef CONFIG_OF
s5m8767_pmic_dt_parse_dvs_gpio(struct sec_pmic_dev * iodev,struct sec_platform_data * pdata,struct device_node * pmic_np)488 static int s5m8767_pmic_dt_parse_dvs_gpio(struct sec_pmic_dev *iodev,
489 struct sec_platform_data *pdata,
490 struct device_node *pmic_np)
491 {
492 int i, gpio;
493
494 for (i = 0; i < 3; i++) {
495 gpio = of_get_named_gpio(pmic_np,
496 "s5m8767,pmic-buck-dvs-gpios", i);
497 if (!gpio_is_valid(gpio)) {
498 dev_err(iodev->dev, "invalid gpio[%d]: %d\n", i, gpio);
499 return -EINVAL;
500 }
501 pdata->buck_gpios[i] = gpio;
502 }
503 return 0;
504 }
505
s5m8767_pmic_dt_parse_ds_gpio(struct sec_pmic_dev * iodev,struct sec_platform_data * pdata,struct device_node * pmic_np)506 static int s5m8767_pmic_dt_parse_ds_gpio(struct sec_pmic_dev *iodev,
507 struct sec_platform_data *pdata,
508 struct device_node *pmic_np)
509 {
510 int i, gpio;
511
512 for (i = 0; i < 3; i++) {
513 gpio = of_get_named_gpio(pmic_np,
514 "s5m8767,pmic-buck-ds-gpios", i);
515 if (!gpio_is_valid(gpio)) {
516 dev_err(iodev->dev, "invalid gpio[%d]: %d\n", i, gpio);
517 return -EINVAL;
518 }
519 pdata->buck_ds[i] = gpio;
520 }
521 return 0;
522 }
523
s5m8767_pmic_dt_parse_pdata(struct platform_device * pdev,struct sec_platform_data * pdata)524 static int s5m8767_pmic_dt_parse_pdata(struct platform_device *pdev,
525 struct sec_platform_data *pdata)
526 {
527 struct sec_pmic_dev *iodev = dev_get_drvdata(pdev->dev.parent);
528 struct device_node *pmic_np, *regulators_np, *reg_np;
529 struct sec_regulator_data *rdata;
530 struct sec_opmode_data *rmode;
531 unsigned int i, dvs_voltage_nr = 8, ret;
532
533 pmic_np = iodev->dev->of_node;
534 if (!pmic_np) {
535 dev_err(iodev->dev, "could not find pmic sub-node\n");
536 return -ENODEV;
537 }
538
539 regulators_np = of_get_child_by_name(pmic_np, "regulators");
540 if (!regulators_np) {
541 dev_err(iodev->dev, "could not find regulators sub-node\n");
542 return -EINVAL;
543 }
544
545 /* count the number of regulators to be supported in pmic */
546 pdata->num_regulators = of_get_child_count(regulators_np);
547
548 rdata = devm_kcalloc(&pdev->dev,
549 pdata->num_regulators, sizeof(*rdata),
550 GFP_KERNEL);
551 if (!rdata)
552 return -ENOMEM;
553
554 rmode = devm_kcalloc(&pdev->dev,
555 pdata->num_regulators, sizeof(*rmode),
556 GFP_KERNEL);
557 if (!rmode)
558 return -ENOMEM;
559
560 pdata->regulators = rdata;
561 pdata->opmode = rmode;
562 for_each_child_of_node(regulators_np, reg_np) {
563 for (i = 0; i < ARRAY_SIZE(regulators); i++)
564 if (!of_node_cmp(reg_np->name, regulators[i].name))
565 break;
566
567 if (i == ARRAY_SIZE(regulators)) {
568 dev_warn(iodev->dev,
569 "don't know how to configure regulator %s\n",
570 reg_np->name);
571 continue;
572 }
573
574 rdata->ext_control_gpiod = devm_gpiod_get_from_of_node(&pdev->dev,
575 reg_np,
576 "s5m8767,pmic-ext-control-gpios",
577 0,
578 GPIOD_OUT_HIGH,
579 "s5m8767");
580 if (IS_ERR(rdata->ext_control_gpiod))
581 return PTR_ERR(rdata->ext_control_gpiod);
582
583 rdata->id = i;
584 rdata->initdata = of_get_regulator_init_data(
585 &pdev->dev, reg_np,
586 ®ulators[i]);
587 rdata->reg_node = reg_np;
588 rdata++;
589 rmode->id = i;
590 if (of_property_read_u32(reg_np, "op_mode",
591 &rmode->mode)) {
592 dev_warn(iodev->dev,
593 "no op_mode property property at %pOF\n",
594 reg_np);
595
596 rmode->mode = S5M8767_OPMODE_NORMAL_MODE;
597 }
598 rmode++;
599 }
600
601 of_node_put(regulators_np);
602
603 if (of_get_property(pmic_np, "s5m8767,pmic-buck2-uses-gpio-dvs", NULL)) {
604 pdata->buck2_gpiodvs = true;
605
606 if (of_property_read_u32_array(pmic_np,
607 "s5m8767,pmic-buck2-dvs-voltage",
608 pdata->buck2_voltage, dvs_voltage_nr)) {
609 dev_err(iodev->dev, "buck2 voltages not specified\n");
610 return -EINVAL;
611 }
612 }
613
614 if (of_get_property(pmic_np, "s5m8767,pmic-buck3-uses-gpio-dvs", NULL)) {
615 pdata->buck3_gpiodvs = true;
616
617 if (of_property_read_u32_array(pmic_np,
618 "s5m8767,pmic-buck3-dvs-voltage",
619 pdata->buck3_voltage, dvs_voltage_nr)) {
620 dev_err(iodev->dev, "buck3 voltages not specified\n");
621 return -EINVAL;
622 }
623 }
624
625 if (of_get_property(pmic_np, "s5m8767,pmic-buck4-uses-gpio-dvs", NULL)) {
626 pdata->buck4_gpiodvs = true;
627
628 if (of_property_read_u32_array(pmic_np,
629 "s5m8767,pmic-buck4-dvs-voltage",
630 pdata->buck4_voltage, dvs_voltage_nr)) {
631 dev_err(iodev->dev, "buck4 voltages not specified\n");
632 return -EINVAL;
633 }
634 }
635
636 if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs ||
637 pdata->buck4_gpiodvs) {
638 ret = s5m8767_pmic_dt_parse_dvs_gpio(iodev, pdata, pmic_np);
639 if (ret)
640 return -EINVAL;
641
642 if (of_property_read_u32(pmic_np,
643 "s5m8767,pmic-buck-default-dvs-idx",
644 &pdata->buck_default_idx)) {
645 pdata->buck_default_idx = 0;
646 } else {
647 if (pdata->buck_default_idx >= 8) {
648 pdata->buck_default_idx = 0;
649 dev_info(iodev->dev,
650 "invalid value for default dvs index, use 0\n");
651 }
652 }
653 }
654
655 ret = s5m8767_pmic_dt_parse_ds_gpio(iodev, pdata, pmic_np);
656 if (ret)
657 return -EINVAL;
658
659 if (of_get_property(pmic_np, "s5m8767,pmic-buck2-ramp-enable", NULL))
660 pdata->buck2_ramp_enable = true;
661
662 if (of_get_property(pmic_np, "s5m8767,pmic-buck3-ramp-enable", NULL))
663 pdata->buck3_ramp_enable = true;
664
665 if (of_get_property(pmic_np, "s5m8767,pmic-buck4-ramp-enable", NULL))
666 pdata->buck4_ramp_enable = true;
667
668 if (pdata->buck2_ramp_enable || pdata->buck3_ramp_enable
669 || pdata->buck4_ramp_enable) {
670 if (of_property_read_u32(pmic_np, "s5m8767,pmic-buck-ramp-delay",
671 &pdata->buck_ramp_delay))
672 pdata->buck_ramp_delay = 0;
673 }
674
675 return 0;
676 }
677 #else
s5m8767_pmic_dt_parse_pdata(struct platform_device * pdev,struct sec_platform_data * pdata)678 static int s5m8767_pmic_dt_parse_pdata(struct platform_device *pdev,
679 struct sec_platform_data *pdata)
680 {
681 return 0;
682 }
683 #endif /* CONFIG_OF */
684
s5m8767_pmic_probe(struct platform_device * pdev)685 static int s5m8767_pmic_probe(struct platform_device *pdev)
686 {
687 struct sec_pmic_dev *iodev = dev_get_drvdata(pdev->dev.parent);
688 struct sec_platform_data *pdata = iodev->pdata;
689 struct regulator_config config = { };
690 struct s5m8767_info *s5m8767;
691 int i, ret, buck_init;
692
693 if (!pdata) {
694 dev_err(pdev->dev.parent, "Platform data not supplied\n");
695 return -ENODEV;
696 }
697
698 if (iodev->dev->of_node) {
699 ret = s5m8767_pmic_dt_parse_pdata(pdev, pdata);
700 if (ret)
701 return ret;
702 }
703
704 if (pdata->buck2_gpiodvs) {
705 if (pdata->buck3_gpiodvs || pdata->buck4_gpiodvs) {
706 dev_err(&pdev->dev, "S5M8767 GPIO DVS NOT VALID\n");
707 return -EINVAL;
708 }
709 }
710
711 if (pdata->buck3_gpiodvs) {
712 if (pdata->buck2_gpiodvs || pdata->buck4_gpiodvs) {
713 dev_err(&pdev->dev, "S5M8767 GPIO DVS NOT VALID\n");
714 return -EINVAL;
715 }
716 }
717
718 if (pdata->buck4_gpiodvs) {
719 if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs) {
720 dev_err(&pdev->dev, "S5M8767 GPIO DVS NOT VALID\n");
721 return -EINVAL;
722 }
723 }
724
725 s5m8767 = devm_kzalloc(&pdev->dev, sizeof(struct s5m8767_info),
726 GFP_KERNEL);
727 if (!s5m8767)
728 return -ENOMEM;
729
730 s5m8767->dev = &pdev->dev;
731 s5m8767->iodev = iodev;
732 s5m8767->num_regulators = pdata->num_regulators;
733 platform_set_drvdata(pdev, s5m8767);
734
735 s5m8767->buck_gpioindex = pdata->buck_default_idx;
736 s5m8767->buck2_gpiodvs = pdata->buck2_gpiodvs;
737 s5m8767->buck3_gpiodvs = pdata->buck3_gpiodvs;
738 s5m8767->buck4_gpiodvs = pdata->buck4_gpiodvs;
739 s5m8767->buck_gpios[0] = pdata->buck_gpios[0];
740 s5m8767->buck_gpios[1] = pdata->buck_gpios[1];
741 s5m8767->buck_gpios[2] = pdata->buck_gpios[2];
742 s5m8767->buck_ds[0] = pdata->buck_ds[0];
743 s5m8767->buck_ds[1] = pdata->buck_ds[1];
744 s5m8767->buck_ds[2] = pdata->buck_ds[2];
745
746 s5m8767->ramp_delay = pdata->buck_ramp_delay;
747 s5m8767->buck2_ramp = pdata->buck2_ramp_enable;
748 s5m8767->buck3_ramp = pdata->buck3_ramp_enable;
749 s5m8767->buck4_ramp = pdata->buck4_ramp_enable;
750 s5m8767->opmode = pdata->opmode;
751
752 buck_init = s5m8767_convert_voltage_to_sel(&buck_voltage_val2,
753 pdata->buck2_init);
754
755 regmap_write(s5m8767->iodev->regmap_pmic, S5M8767_REG_BUCK2DVS2,
756 buck_init);
757
758 buck_init = s5m8767_convert_voltage_to_sel(&buck_voltage_val2,
759 pdata->buck3_init);
760
761 regmap_write(s5m8767->iodev->regmap_pmic, S5M8767_REG_BUCK3DVS2,
762 buck_init);
763
764 buck_init = s5m8767_convert_voltage_to_sel(&buck_voltage_val2,
765 pdata->buck4_init);
766
767 regmap_write(s5m8767->iodev->regmap_pmic, S5M8767_REG_BUCK4DVS2,
768 buck_init);
769
770 for (i = 0; i < 8; i++) {
771 if (s5m8767->buck2_gpiodvs) {
772 s5m8767->buck2_vol[i] =
773 s5m8767_convert_voltage_to_sel(
774 &buck_voltage_val2,
775 pdata->buck2_voltage[i]);
776 }
777
778 if (s5m8767->buck3_gpiodvs) {
779 s5m8767->buck3_vol[i] =
780 s5m8767_convert_voltage_to_sel(
781 &buck_voltage_val2,
782 pdata->buck3_voltage[i]);
783 }
784
785 if (s5m8767->buck4_gpiodvs) {
786 s5m8767->buck4_vol[i] =
787 s5m8767_convert_voltage_to_sel(
788 &buck_voltage_val2,
789 pdata->buck4_voltage[i]);
790 }
791 }
792
793 if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs ||
794 pdata->buck4_gpiodvs) {
795
796 if (!gpio_is_valid(pdata->buck_gpios[0]) ||
797 !gpio_is_valid(pdata->buck_gpios[1]) ||
798 !gpio_is_valid(pdata->buck_gpios[2])) {
799 dev_err(&pdev->dev, "GPIO NOT VALID\n");
800 return -EINVAL;
801 }
802
803 ret = devm_gpio_request(&pdev->dev, pdata->buck_gpios[0],
804 "S5M8767 SET1");
805 if (ret)
806 return ret;
807
808 ret = devm_gpio_request(&pdev->dev, pdata->buck_gpios[1],
809 "S5M8767 SET2");
810 if (ret)
811 return ret;
812
813 ret = devm_gpio_request(&pdev->dev, pdata->buck_gpios[2],
814 "S5M8767 SET3");
815 if (ret)
816 return ret;
817
818 /* SET1 GPIO */
819 gpio_direction_output(pdata->buck_gpios[0],
820 (s5m8767->buck_gpioindex >> 2) & 0x1);
821 /* SET2 GPIO */
822 gpio_direction_output(pdata->buck_gpios[1],
823 (s5m8767->buck_gpioindex >> 1) & 0x1);
824 /* SET3 GPIO */
825 gpio_direction_output(pdata->buck_gpios[2],
826 (s5m8767->buck_gpioindex >> 0) & 0x1);
827 }
828
829 ret = devm_gpio_request(&pdev->dev, pdata->buck_ds[0], "S5M8767 DS2");
830 if (ret)
831 return ret;
832
833 ret = devm_gpio_request(&pdev->dev, pdata->buck_ds[1], "S5M8767 DS3");
834 if (ret)
835 return ret;
836
837 ret = devm_gpio_request(&pdev->dev, pdata->buck_ds[2], "S5M8767 DS4");
838 if (ret)
839 return ret;
840
841 /* DS2 GPIO */
842 gpio_direction_output(pdata->buck_ds[0], 0x0);
843 /* DS3 GPIO */
844 gpio_direction_output(pdata->buck_ds[1], 0x0);
845 /* DS4 GPIO */
846 gpio_direction_output(pdata->buck_ds[2], 0x0);
847
848 if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs ||
849 pdata->buck4_gpiodvs) {
850 regmap_update_bits(s5m8767->iodev->regmap_pmic,
851 S5M8767_REG_BUCK2CTRL, 1 << 1,
852 (pdata->buck2_gpiodvs) ? (1 << 1) : (0 << 1));
853 regmap_update_bits(s5m8767->iodev->regmap_pmic,
854 S5M8767_REG_BUCK3CTRL, 1 << 1,
855 (pdata->buck3_gpiodvs) ? (1 << 1) : (0 << 1));
856 regmap_update_bits(s5m8767->iodev->regmap_pmic,
857 S5M8767_REG_BUCK4CTRL, 1 << 1,
858 (pdata->buck4_gpiodvs) ? (1 << 1) : (0 << 1));
859 }
860
861 /* Initialize GPIO DVS registers */
862 for (i = 0; i < 8; i++) {
863 if (s5m8767->buck2_gpiodvs) {
864 regmap_write(s5m8767->iodev->regmap_pmic,
865 S5M8767_REG_BUCK2DVS1 + i,
866 s5m8767->buck2_vol[i]);
867 }
868
869 if (s5m8767->buck3_gpiodvs) {
870 regmap_write(s5m8767->iodev->regmap_pmic,
871 S5M8767_REG_BUCK3DVS1 + i,
872 s5m8767->buck3_vol[i]);
873 }
874
875 if (s5m8767->buck4_gpiodvs) {
876 regmap_write(s5m8767->iodev->regmap_pmic,
877 S5M8767_REG_BUCK4DVS1 + i,
878 s5m8767->buck4_vol[i]);
879 }
880 }
881
882 if (s5m8767->buck2_ramp)
883 regmap_update_bits(s5m8767->iodev->regmap_pmic,
884 S5M8767_REG_DVSRAMP, 0x08, 0x08);
885
886 if (s5m8767->buck3_ramp)
887 regmap_update_bits(s5m8767->iodev->regmap_pmic,
888 S5M8767_REG_DVSRAMP, 0x04, 0x04);
889
890 if (s5m8767->buck4_ramp)
891 regmap_update_bits(s5m8767->iodev->regmap_pmic,
892 S5M8767_REG_DVSRAMP, 0x02, 0x02);
893
894 if (s5m8767->buck2_ramp || s5m8767->buck3_ramp
895 || s5m8767->buck4_ramp) {
896 unsigned int val;
897 switch (s5m8767->ramp_delay) {
898 case 5:
899 val = S5M8767_DVS_BUCK_RAMP_5;
900 break;
901 case 10:
902 val = S5M8767_DVS_BUCK_RAMP_10;
903 break;
904 case 25:
905 val = S5M8767_DVS_BUCK_RAMP_25;
906 break;
907 case 50:
908 val = S5M8767_DVS_BUCK_RAMP_50;
909 break;
910 case 100:
911 val = S5M8767_DVS_BUCK_RAMP_100;
912 break;
913 default:
914 val = S5M8767_DVS_BUCK_RAMP_10;
915 }
916 regmap_update_bits(s5m8767->iodev->regmap_pmic,
917 S5M8767_REG_DVSRAMP,
918 S5M8767_DVS_BUCK_RAMP_MASK,
919 val << S5M8767_DVS_BUCK_RAMP_SHIFT);
920 }
921
922 for (i = 0; i < pdata->num_regulators; i++) {
923 const struct sec_voltage_desc *desc;
924 int id = pdata->regulators[i].id;
925 int enable_reg, enable_val;
926 struct regulator_dev *rdev;
927
928 desc = reg_voltage_map[id];
929 if (desc) {
930 regulators[id].n_voltages =
931 (desc->max - desc->min) / desc->step + 1;
932 regulators[id].min_uV = desc->min;
933 regulators[id].uV_step = desc->step;
934 regulators[id].vsel_reg =
935 s5m8767_get_vsel_reg(id, s5m8767);
936 if (id < S5M8767_BUCK1)
937 regulators[id].vsel_mask = 0x3f;
938 else
939 regulators[id].vsel_mask = 0xff;
940
941 ret = s5m8767_get_register(s5m8767, id, &enable_reg,
942 &enable_val);
943 if (ret) {
944 dev_err(s5m8767->dev, "error reading registers\n");
945 return ret;
946 }
947 regulators[id].enable_reg = enable_reg;
948 regulators[id].enable_mask = S5M8767_ENCTRL_MASK;
949 regulators[id].enable_val = enable_val;
950 }
951
952 config.dev = s5m8767->dev;
953 config.init_data = pdata->regulators[i].initdata;
954 config.driver_data = s5m8767;
955 config.regmap = iodev->regmap_pmic;
956 config.of_node = pdata->regulators[i].reg_node;
957 config.ena_gpiod = NULL;
958 if (pdata->regulators[i].ext_control_gpiod)
959 s5m8767_regulator_config_ext_control(s5m8767,
960 &pdata->regulators[i], &config);
961
962 rdev = devm_regulator_register(&pdev->dev, ®ulators[id],
963 &config);
964 if (IS_ERR(rdev)) {
965 ret = PTR_ERR(rdev);
966 dev_err(s5m8767->dev, "regulator init failed for %d\n",
967 id);
968 return ret;
969 }
970
971 if (pdata->regulators[i].ext_control_gpiod) {
972 ret = s5m8767_enable_ext_control(s5m8767, rdev);
973 if (ret < 0) {
974 dev_err(s5m8767->dev,
975 "failed to enable gpio control over %s: %d\n",
976 rdev->desc->name, ret);
977 return ret;
978 }
979 }
980 }
981
982 return 0;
983 }
984
985 static const struct platform_device_id s5m8767_pmic_id[] = {
986 { "s5m8767-pmic", 0},
987 { },
988 };
989 MODULE_DEVICE_TABLE(platform, s5m8767_pmic_id);
990
991 static struct platform_driver s5m8767_pmic_driver = {
992 .driver = {
993 .name = "s5m8767-pmic",
994 },
995 .probe = s5m8767_pmic_probe,
996 .id_table = s5m8767_pmic_id,
997 };
998
s5m8767_pmic_init(void)999 static int __init s5m8767_pmic_init(void)
1000 {
1001 return platform_driver_register(&s5m8767_pmic_driver);
1002 }
1003 subsys_initcall(s5m8767_pmic_init);
1004
s5m8767_pmic_exit(void)1005 static void __exit s5m8767_pmic_exit(void)
1006 {
1007 platform_driver_unregister(&s5m8767_pmic_driver);
1008 }
1009 module_exit(s5m8767_pmic_exit);
1010
1011 /* Module information */
1012 MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>");
1013 MODULE_DESCRIPTION("SAMSUNG S5M8767 Regulator Driver");
1014 MODULE_LICENSE("GPL");
1015
