1 // SPDX-License-Identifier: GPL-2.0-only
2 // Copyright (C) 2019 ROHM Semiconductors
3 // bd71828-regulator.c ROHM BD71828GW-DS1 regulator driver
4 //
5 
6 #include <linux/delay.h>
7 #include <linux/err.h>
8 #include <linux/gpio.h>
9 #include <linux/interrupt.h>
10 #include <linux/kernel.h>
11 #include <linux/mfd/rohm-bd71828.h>
12 #include <linux/module.h>
13 #include <linux/of.h>
14 #include <linux/platform_device.h>
15 #include <linux/regmap.h>
16 #include <linux/regulator/driver.h>
17 #include <linux/regulator/machine.h>
18 #include <linux/regulator/of_regulator.h>
19 
20 struct reg_init {
21 	unsigned int reg;
22 	unsigned int mask;
23 	unsigned int val;
24 };
25 struct bd71828_regulator_data {
26 	struct regulator_desc desc;
27 	const struct rohm_dvs_config dvs;
28 	const struct reg_init *reg_inits;
29 	int reg_init_amnt;
30 };
31 
32 static const struct reg_init buck1_inits[] = {
33 	/*
34 	 * DVS Buck voltages can be changed by register values or via GPIO.
35 	 * Use register accesses by default.
36 	 */
37 	{
38 		.reg = BD71828_REG_PS_CTRL_1,
39 		.mask = BD71828_MASK_DVS_BUCK1_CTRL,
40 		.val = BD71828_DVS_BUCK1_CTRL_I2C,
41 	},
42 };
43 
44 static const struct reg_init buck2_inits[] = {
45 	{
46 		.reg = BD71828_REG_PS_CTRL_1,
47 		.mask = BD71828_MASK_DVS_BUCK2_CTRL,
48 		.val = BD71828_DVS_BUCK2_CTRL_I2C,
49 	},
50 };
51 
52 static const struct reg_init buck6_inits[] = {
53 	{
54 		.reg = BD71828_REG_PS_CTRL_1,
55 		.mask = BD71828_MASK_DVS_BUCK6_CTRL,
56 		.val = BD71828_DVS_BUCK6_CTRL_I2C,
57 	},
58 };
59 
60 static const struct reg_init buck7_inits[] = {
61 	{
62 		.reg = BD71828_REG_PS_CTRL_1,
63 		.mask = BD71828_MASK_DVS_BUCK7_CTRL,
64 		.val = BD71828_DVS_BUCK7_CTRL_I2C,
65 	},
66 };
67 
68 static const struct linear_range bd71828_buck1267_volts[] = {
69 	REGULATOR_LINEAR_RANGE(500000, 0x00, 0xef, 6250),
70 	REGULATOR_LINEAR_RANGE(2000000, 0xf0, 0xff, 0),
71 };
72 
73 static const struct linear_range bd71828_buck3_volts[] = {
74 	REGULATOR_LINEAR_RANGE(1200000, 0x00, 0x0f, 50000),
75 	REGULATOR_LINEAR_RANGE(2000000, 0x10, 0x1f, 0),
76 };
77 
78 static const struct linear_range bd71828_buck4_volts[] = {
79 	REGULATOR_LINEAR_RANGE(1000000, 0x00, 0x1f, 25000),
80 	REGULATOR_LINEAR_RANGE(1800000, 0x20, 0x3f, 0),
81 };
82 
83 static const struct linear_range bd71828_buck5_volts[] = {
84 	REGULATOR_LINEAR_RANGE(2500000, 0x00, 0x0f, 50000),
85 	REGULATOR_LINEAR_RANGE(3300000, 0x10, 0x1f, 0),
86 };
87 
88 static const struct linear_range bd71828_ldo_volts[] = {
89 	REGULATOR_LINEAR_RANGE(800000, 0x00, 0x31, 50000),
90 	REGULATOR_LINEAR_RANGE(3300000, 0x32, 0x3f, 0),
91 };
92 
93 static int bd71828_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay)
94 {
95 	unsigned int val;
96 
97 	switch (ramp_delay) {
98 	case 1 ... 2500:
99 		val = 0;
100 		break;
101 	case 2501 ... 5000:
102 		val = 1;
103 		break;
104 	case 5001 ... 10000:
105 		val = 2;
106 		break;
107 	case 10001 ... 20000:
108 		val = 3;
109 		break;
110 	default:
111 		val = 3;
112 		dev_err(&rdev->dev,
113 			"ramp_delay: %d not supported, setting 20mV/uS",
114 			 ramp_delay);
115 	}
116 
117 	/*
118 	 * On BD71828 the ramp delay level control reg is at offset +2 to
119 	 * enable reg
120 	 */
121 	return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg + 2,
122 				  BD71828_MASK_RAMP_DELAY,
123 				  val << (ffs(BD71828_MASK_RAMP_DELAY) - 1));
124 }
125 
126 static int buck_set_hw_dvs_levels(struct device_node *np,
127 				  const struct regulator_desc *desc,
128 				  struct regulator_config *cfg)
129 {
130 	struct bd71828_regulator_data *data;
131 
132 	data = container_of(desc, struct bd71828_regulator_data, desc);
133 
134 	return rohm_regulator_set_dvs_levels(&data->dvs, np, desc, cfg->regmap);
135 }
136 
137 static int ldo6_parse_dt(struct device_node *np,
138 			 const struct regulator_desc *desc,
139 			 struct regulator_config *cfg)
140 {
141 	int ret, i;
142 	uint32_t uv = 0;
143 	unsigned int en;
144 	struct regmap *regmap = cfg->regmap;
145 	static const char * const props[] = { "rohm,dvs-run-voltage",
146 					      "rohm,dvs-idle-voltage",
147 					      "rohm,dvs-suspend-voltage",
148 					      "rohm,dvs-lpsr-voltage" };
149 	unsigned int mask[] = { BD71828_MASK_RUN_EN, BD71828_MASK_IDLE_EN,
150 			       BD71828_MASK_SUSP_EN, BD71828_MASK_LPSR_EN };
151 
152 	for (i = 0; i < ARRAY_SIZE(props); i++) {
153 		ret = of_property_read_u32(np, props[i], &uv);
154 		if (ret) {
155 			if (ret != -EINVAL)
156 				return ret;
157 			continue;
158 		}
159 		if (uv)
160 			en = 0xffffffff;
161 		else
162 			en = 0;
163 
164 		ret = regmap_update_bits(regmap, desc->enable_reg, mask[i], en);
165 		if (ret)
166 			return ret;
167 	}
168 	return 0;
169 }
170 
171 static const struct regulator_ops bd71828_buck_ops = {
172 	.enable = regulator_enable_regmap,
173 	.disable = regulator_disable_regmap,
174 	.is_enabled = regulator_is_enabled_regmap,
175 	.list_voltage = regulator_list_voltage_linear_range,
176 	.set_voltage_sel = regulator_set_voltage_sel_regmap,
177 	.get_voltage_sel = regulator_get_voltage_sel_regmap,
178 };
179 
180 static const struct regulator_ops bd71828_dvs_buck_ops = {
181 	.enable = regulator_enable_regmap,
182 	.disable = regulator_disable_regmap,
183 	.is_enabled = regulator_is_enabled_regmap,
184 	.list_voltage = regulator_list_voltage_linear_range,
185 	.set_voltage_sel = regulator_set_voltage_sel_regmap,
186 	.get_voltage_sel = regulator_get_voltage_sel_regmap,
187 	.set_voltage_time_sel = regulator_set_voltage_time_sel,
188 	.set_ramp_delay = bd71828_set_ramp_delay,
189 };
190 
191 static const struct regulator_ops bd71828_ldo_ops = {
192 	.enable = regulator_enable_regmap,
193 	.disable = regulator_disable_regmap,
194 	.is_enabled = regulator_is_enabled_regmap,
195 	.list_voltage = regulator_list_voltage_linear_range,
196 	.set_voltage_sel = regulator_set_voltage_sel_regmap,
197 	.get_voltage_sel = regulator_get_voltage_sel_regmap,
198 };
199 
200 static const struct regulator_ops bd71828_ldo6_ops = {
201 	.enable = regulator_enable_regmap,
202 	.disable = regulator_disable_regmap,
203 	.is_enabled = regulator_is_enabled_regmap,
204 };
205 
206 static const struct bd71828_regulator_data bd71828_rdata[] = {
207 	{
208 		.desc = {
209 			.name = "buck1",
210 			.of_match = of_match_ptr("BUCK1"),
211 			.regulators_node = of_match_ptr("regulators"),
212 			.id = BD71828_BUCK1,
213 			.ops = &bd71828_dvs_buck_ops,
214 			.type = REGULATOR_VOLTAGE,
215 			.linear_ranges = bd71828_buck1267_volts,
216 			.n_linear_ranges = ARRAY_SIZE(bd71828_buck1267_volts),
217 			.n_voltages = BD71828_BUCK1267_VOLTS,
218 			.enable_reg = BD71828_REG_BUCK1_EN,
219 			.enable_mask = BD71828_MASK_RUN_EN,
220 			.vsel_reg = BD71828_REG_BUCK1_VOLT,
221 			.vsel_mask = BD71828_MASK_BUCK1267_VOLT,
222 			.owner = THIS_MODULE,
223 			.of_parse_cb = buck_set_hw_dvs_levels,
224 		},
225 		.dvs = {
226 			.level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_IDLE |
227 				     ROHM_DVS_LEVEL_SUSPEND |
228 				     ROHM_DVS_LEVEL_LPSR,
229 			.run_reg = BD71828_REG_BUCK1_VOLT,
230 			.run_mask = BD71828_MASK_BUCK1267_VOLT,
231 			.idle_reg = BD71828_REG_BUCK1_IDLE_VOLT,
232 			.idle_mask = BD71828_MASK_BUCK1267_VOLT,
233 			.idle_on_mask = BD71828_MASK_IDLE_EN,
234 			.suspend_reg = BD71828_REG_BUCK1_SUSP_VOLT,
235 			.suspend_mask = BD71828_MASK_BUCK1267_VOLT,
236 			.suspend_on_mask = BD71828_MASK_SUSP_EN,
237 			.lpsr_on_mask = BD71828_MASK_LPSR_EN,
238 			/*
239 			 * LPSR voltage is same as SUSPEND voltage. Allow
240 			 * setting it so that regulator can be set enabled at
241 			 * LPSR state
242 			 */
243 			.lpsr_reg = BD71828_REG_BUCK1_SUSP_VOLT,
244 			.lpsr_mask = BD71828_MASK_BUCK1267_VOLT,
245 		},
246 		.reg_inits = buck1_inits,
247 		.reg_init_amnt = ARRAY_SIZE(buck1_inits),
248 	},
249 	{
250 		.desc = {
251 			.name = "buck2",
252 			.of_match = of_match_ptr("BUCK2"),
253 			.regulators_node = of_match_ptr("regulators"),
254 			.id = BD71828_BUCK2,
255 			.ops = &bd71828_dvs_buck_ops,
256 			.type = REGULATOR_VOLTAGE,
257 			.linear_ranges = bd71828_buck1267_volts,
258 			.n_linear_ranges = ARRAY_SIZE(bd71828_buck1267_volts),
259 			.n_voltages = BD71828_BUCK1267_VOLTS,
260 			.enable_reg = BD71828_REG_BUCK2_EN,
261 			.enable_mask = BD71828_MASK_RUN_EN,
262 			.vsel_reg = BD71828_REG_BUCK2_VOLT,
263 			.vsel_mask = BD71828_MASK_BUCK1267_VOLT,
264 			.owner = THIS_MODULE,
265 			.of_parse_cb = buck_set_hw_dvs_levels,
266 		},
267 		.dvs = {
268 			.level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_IDLE |
269 				     ROHM_DVS_LEVEL_SUSPEND |
270 				     ROHM_DVS_LEVEL_LPSR,
271 			.run_reg = BD71828_REG_BUCK2_VOLT,
272 			.run_mask = BD71828_MASK_BUCK1267_VOLT,
273 			.idle_reg = BD71828_REG_BUCK2_IDLE_VOLT,
274 			.idle_mask = BD71828_MASK_BUCK1267_VOLT,
275 			.idle_on_mask = BD71828_MASK_IDLE_EN,
276 			.suspend_reg = BD71828_REG_BUCK2_SUSP_VOLT,
277 			.suspend_mask = BD71828_MASK_BUCK1267_VOLT,
278 			.suspend_on_mask = BD71828_MASK_SUSP_EN,
279 			.lpsr_on_mask = BD71828_MASK_LPSR_EN,
280 			.lpsr_reg = BD71828_REG_BUCK2_SUSP_VOLT,
281 			.lpsr_mask = BD71828_MASK_BUCK1267_VOLT,
282 		},
283 		.reg_inits = buck2_inits,
284 		.reg_init_amnt = ARRAY_SIZE(buck2_inits),
285 	},
286 	{
287 		.desc = {
288 			.name = "buck3",
289 			.of_match = of_match_ptr("BUCK3"),
290 			.regulators_node = of_match_ptr("regulators"),
291 			.id = BD71828_BUCK3,
292 			.ops = &bd71828_buck_ops,
293 			.type = REGULATOR_VOLTAGE,
294 			.linear_ranges = bd71828_buck3_volts,
295 			.n_linear_ranges = ARRAY_SIZE(bd71828_buck3_volts),
296 			.n_voltages = BD71828_BUCK3_VOLTS,
297 			.enable_reg = BD71828_REG_BUCK3_EN,
298 			.enable_mask = BD71828_MASK_RUN_EN,
299 			.vsel_reg = BD71828_REG_BUCK3_VOLT,
300 			.vsel_mask = BD71828_MASK_BUCK3_VOLT,
301 			.owner = THIS_MODULE,
302 			.of_parse_cb = buck_set_hw_dvs_levels,
303 		},
304 		.dvs = {
305 			/*
306 			 * BUCK3 only supports single voltage for all states.
307 			 * voltage can be individually enabled for each state
308 			 * though => allow setting all states to support
309 			 * enabling power rail on different states.
310 			 */
311 			.level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_IDLE |
312 				     ROHM_DVS_LEVEL_SUSPEND |
313 				     ROHM_DVS_LEVEL_LPSR,
314 			.run_reg = BD71828_REG_BUCK3_VOLT,
315 			.idle_reg = BD71828_REG_BUCK3_VOLT,
316 			.suspend_reg = BD71828_REG_BUCK3_VOLT,
317 			.lpsr_reg = BD71828_REG_BUCK3_VOLT,
318 			.run_mask = BD71828_MASK_BUCK3_VOLT,
319 			.idle_mask = BD71828_MASK_BUCK3_VOLT,
320 			.suspend_mask = BD71828_MASK_BUCK3_VOLT,
321 			.lpsr_mask = BD71828_MASK_BUCK3_VOLT,
322 			.idle_on_mask = BD71828_MASK_IDLE_EN,
323 			.suspend_on_mask = BD71828_MASK_SUSP_EN,
324 			.lpsr_on_mask = BD71828_MASK_LPSR_EN,
325 		},
326 	},
327 	{
328 		.desc = {
329 			.name = "buck4",
330 			.of_match = of_match_ptr("BUCK4"),
331 			.regulators_node = of_match_ptr("regulators"),
332 			.id = BD71828_BUCK4,
333 			.ops = &bd71828_buck_ops,
334 			.type = REGULATOR_VOLTAGE,
335 			.linear_ranges = bd71828_buck4_volts,
336 			.n_linear_ranges = ARRAY_SIZE(bd71828_buck4_volts),
337 			.n_voltages = BD71828_BUCK4_VOLTS,
338 			.enable_reg = BD71828_REG_BUCK4_EN,
339 			.enable_mask = BD71828_MASK_RUN_EN,
340 			.vsel_reg = BD71828_REG_BUCK4_VOLT,
341 			.vsel_mask = BD71828_MASK_BUCK4_VOLT,
342 			.owner = THIS_MODULE,
343 			.of_parse_cb = buck_set_hw_dvs_levels,
344 		},
345 		.dvs = {
346 			/*
347 			 * BUCK4 only supports single voltage for all states.
348 			 * voltage can be individually enabled for each state
349 			 * though => allow setting all states to support
350 			 * enabling power rail on different states.
351 			 */
352 			.level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_IDLE |
353 				     ROHM_DVS_LEVEL_SUSPEND |
354 				     ROHM_DVS_LEVEL_LPSR,
355 			.run_reg = BD71828_REG_BUCK4_VOLT,
356 			.idle_reg = BD71828_REG_BUCK4_VOLT,
357 			.suspend_reg = BD71828_REG_BUCK4_VOLT,
358 			.lpsr_reg = BD71828_REG_BUCK4_VOLT,
359 			.run_mask = BD71828_MASK_BUCK4_VOLT,
360 			.idle_mask = BD71828_MASK_BUCK4_VOLT,
361 			.suspend_mask = BD71828_MASK_BUCK4_VOLT,
362 			.lpsr_mask = BD71828_MASK_BUCK4_VOLT,
363 			.idle_on_mask = BD71828_MASK_IDLE_EN,
364 			.suspend_on_mask = BD71828_MASK_SUSP_EN,
365 			.lpsr_on_mask = BD71828_MASK_LPSR_EN,
366 		},
367 	},
368 	{
369 		.desc = {
370 			.name = "buck5",
371 			.of_match = of_match_ptr("BUCK5"),
372 			.regulators_node = of_match_ptr("regulators"),
373 			.id = BD71828_BUCK5,
374 			.ops = &bd71828_buck_ops,
375 			.type = REGULATOR_VOLTAGE,
376 			.linear_ranges = bd71828_buck5_volts,
377 			.n_linear_ranges = ARRAY_SIZE(bd71828_buck5_volts),
378 			.n_voltages = BD71828_BUCK5_VOLTS,
379 			.enable_reg = BD71828_REG_BUCK5_EN,
380 			.enable_mask = BD71828_MASK_RUN_EN,
381 			.vsel_reg = BD71828_REG_BUCK5_VOLT,
382 			.vsel_mask = BD71828_MASK_BUCK5_VOLT,
383 			.owner = THIS_MODULE,
384 			.of_parse_cb = buck_set_hw_dvs_levels,
385 		},
386 		.dvs = {
387 			/*
388 			 * BUCK5 only supports single voltage for all states.
389 			 * voltage can be individually enabled for each state
390 			 * though => allow setting all states to support
391 			 * enabling power rail on different states.
392 			 */
393 			.level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_IDLE |
394 				     ROHM_DVS_LEVEL_SUSPEND |
395 				     ROHM_DVS_LEVEL_LPSR,
396 			.run_reg = BD71828_REG_BUCK5_VOLT,
397 			.idle_reg = BD71828_REG_BUCK5_VOLT,
398 			.suspend_reg = BD71828_REG_BUCK5_VOLT,
399 			.lpsr_reg = BD71828_REG_BUCK5_VOLT,
400 			.run_mask = BD71828_MASK_BUCK5_VOLT,
401 			.idle_mask = BD71828_MASK_BUCK5_VOLT,
402 			.suspend_mask = BD71828_MASK_BUCK5_VOLT,
403 			.lpsr_mask = BD71828_MASK_BUCK5_VOLT,
404 			.idle_on_mask = BD71828_MASK_IDLE_EN,
405 			.suspend_on_mask = BD71828_MASK_SUSP_EN,
406 			.lpsr_on_mask = BD71828_MASK_LPSR_EN,
407 		},
408 	},
409 	{
410 		.desc = {
411 			.name = "buck6",
412 			.of_match = of_match_ptr("BUCK6"),
413 			.regulators_node = of_match_ptr("regulators"),
414 			.id = BD71828_BUCK6,
415 			.ops = &bd71828_dvs_buck_ops,
416 			.type = REGULATOR_VOLTAGE,
417 			.linear_ranges = bd71828_buck1267_volts,
418 			.n_linear_ranges = ARRAY_SIZE(bd71828_buck1267_volts),
419 			.n_voltages = BD71828_BUCK1267_VOLTS,
420 			.enable_reg = BD71828_REG_BUCK6_EN,
421 			.enable_mask = BD71828_MASK_RUN_EN,
422 			.vsel_reg = BD71828_REG_BUCK6_VOLT,
423 			.vsel_mask = BD71828_MASK_BUCK1267_VOLT,
424 			.owner = THIS_MODULE,
425 			.of_parse_cb = buck_set_hw_dvs_levels,
426 		},
427 		.dvs = {
428 			.level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_IDLE |
429 				     ROHM_DVS_LEVEL_SUSPEND |
430 				     ROHM_DVS_LEVEL_LPSR,
431 			.run_reg = BD71828_REG_BUCK6_VOLT,
432 			.run_mask = BD71828_MASK_BUCK1267_VOLT,
433 			.idle_reg = BD71828_REG_BUCK6_IDLE_VOLT,
434 			.idle_mask = BD71828_MASK_BUCK1267_VOLT,
435 			.idle_on_mask = BD71828_MASK_IDLE_EN,
436 			.suspend_reg = BD71828_REG_BUCK6_SUSP_VOLT,
437 			.suspend_mask = BD71828_MASK_BUCK1267_VOLT,
438 			.suspend_on_mask = BD71828_MASK_SUSP_EN,
439 			.lpsr_on_mask = BD71828_MASK_LPSR_EN,
440 			.lpsr_reg = BD71828_REG_BUCK6_SUSP_VOLT,
441 			.lpsr_mask = BD71828_MASK_BUCK1267_VOLT,
442 		},
443 		.reg_inits = buck6_inits,
444 		.reg_init_amnt = ARRAY_SIZE(buck6_inits),
445 	},
446 	{
447 		.desc = {
448 			.name = "buck7",
449 			.of_match = of_match_ptr("BUCK7"),
450 			.regulators_node = of_match_ptr("regulators"),
451 			.id = BD71828_BUCK7,
452 			.ops = &bd71828_dvs_buck_ops,
453 			.type = REGULATOR_VOLTAGE,
454 			.linear_ranges = bd71828_buck1267_volts,
455 			.n_linear_ranges = ARRAY_SIZE(bd71828_buck1267_volts),
456 			.n_voltages = BD71828_BUCK1267_VOLTS,
457 			.enable_reg = BD71828_REG_BUCK7_EN,
458 			.enable_mask = BD71828_MASK_RUN_EN,
459 			.vsel_reg = BD71828_REG_BUCK7_VOLT,
460 			.vsel_mask = BD71828_MASK_BUCK1267_VOLT,
461 			.owner = THIS_MODULE,
462 			.of_parse_cb = buck_set_hw_dvs_levels,
463 		},
464 		.dvs = {
465 			.level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_IDLE |
466 				     ROHM_DVS_LEVEL_SUSPEND |
467 				     ROHM_DVS_LEVEL_LPSR,
468 			.run_reg = BD71828_REG_BUCK7_VOLT,
469 			.run_mask = BD71828_MASK_BUCK1267_VOLT,
470 			.idle_reg = BD71828_REG_BUCK7_IDLE_VOLT,
471 			.idle_mask = BD71828_MASK_BUCK1267_VOLT,
472 			.idle_on_mask = BD71828_MASK_IDLE_EN,
473 			.suspend_reg = BD71828_REG_BUCK7_SUSP_VOLT,
474 			.suspend_mask = BD71828_MASK_BUCK1267_VOLT,
475 			.suspend_on_mask = BD71828_MASK_SUSP_EN,
476 			.lpsr_on_mask = BD71828_MASK_LPSR_EN,
477 			.lpsr_reg = BD71828_REG_BUCK7_SUSP_VOLT,
478 			.lpsr_mask = BD71828_MASK_BUCK1267_VOLT,
479 		},
480 		.reg_inits = buck7_inits,
481 		.reg_init_amnt = ARRAY_SIZE(buck7_inits),
482 	},
483 	{
484 		.desc = {
485 			.name = "ldo1",
486 			.of_match = of_match_ptr("LDO1"),
487 			.regulators_node = of_match_ptr("regulators"),
488 			.id = BD71828_LDO1,
489 			.ops = &bd71828_ldo_ops,
490 			.type = REGULATOR_VOLTAGE,
491 			.linear_ranges = bd71828_ldo_volts,
492 			.n_linear_ranges = ARRAY_SIZE(bd71828_ldo_volts),
493 			.n_voltages = BD71828_LDO_VOLTS,
494 			.enable_reg = BD71828_REG_LDO1_EN,
495 			.enable_mask = BD71828_MASK_RUN_EN,
496 			.vsel_reg = BD71828_REG_LDO1_VOLT,
497 			.vsel_mask = BD71828_MASK_LDO_VOLT,
498 			.owner = THIS_MODULE,
499 			.of_parse_cb = buck_set_hw_dvs_levels,
500 		},
501 		.dvs = {
502 			/*
503 			 * LDO1 only supports single voltage for all states.
504 			 * voltage can be individually enabled for each state
505 			 * though => allow setting all states to support
506 			 * enabling power rail on different states.
507 			 */
508 			.level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_IDLE |
509 				     ROHM_DVS_LEVEL_SUSPEND |
510 				     ROHM_DVS_LEVEL_LPSR,
511 			.run_reg = BD71828_REG_LDO1_VOLT,
512 			.idle_reg = BD71828_REG_LDO1_VOLT,
513 			.suspend_reg = BD71828_REG_LDO1_VOLT,
514 			.lpsr_reg = BD71828_REG_LDO1_VOLT,
515 			.run_mask = BD71828_MASK_LDO_VOLT,
516 			.idle_mask = BD71828_MASK_LDO_VOLT,
517 			.suspend_mask = BD71828_MASK_LDO_VOLT,
518 			.lpsr_mask = BD71828_MASK_LDO_VOLT,
519 			.idle_on_mask = BD71828_MASK_IDLE_EN,
520 			.suspend_on_mask = BD71828_MASK_SUSP_EN,
521 			.lpsr_on_mask = BD71828_MASK_LPSR_EN,
522 		},
523 	}, {
524 		.desc = {
525 			.name = "ldo2",
526 			.of_match = of_match_ptr("LDO2"),
527 			.regulators_node = of_match_ptr("regulators"),
528 			.id = BD71828_LDO2,
529 			.ops = &bd71828_ldo_ops,
530 			.type = REGULATOR_VOLTAGE,
531 			.linear_ranges = bd71828_ldo_volts,
532 			.n_linear_ranges = ARRAY_SIZE(bd71828_ldo_volts),
533 			.n_voltages = BD71828_LDO_VOLTS,
534 			.enable_reg = BD71828_REG_LDO2_EN,
535 			.enable_mask = BD71828_MASK_RUN_EN,
536 			.vsel_reg = BD71828_REG_LDO2_VOLT,
537 			.vsel_mask = BD71828_MASK_LDO_VOLT,
538 			.owner = THIS_MODULE,
539 			.of_parse_cb = buck_set_hw_dvs_levels,
540 		},
541 		.dvs = {
542 			/*
543 			 * LDO2 only supports single voltage for all states.
544 			 * voltage can be individually enabled for each state
545 			 * though => allow setting all states to support
546 			 * enabling power rail on different states.
547 			 */
548 			.level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_IDLE |
549 				     ROHM_DVS_LEVEL_SUSPEND |
550 				     ROHM_DVS_LEVEL_LPSR,
551 			.run_reg = BD71828_REG_LDO2_VOLT,
552 			.idle_reg = BD71828_REG_LDO2_VOLT,
553 			.suspend_reg = BD71828_REG_LDO2_VOLT,
554 			.lpsr_reg = BD71828_REG_LDO2_VOLT,
555 			.run_mask = BD71828_MASK_LDO_VOLT,
556 			.idle_mask = BD71828_MASK_LDO_VOLT,
557 			.suspend_mask = BD71828_MASK_LDO_VOLT,
558 			.lpsr_mask = BD71828_MASK_LDO_VOLT,
559 			.idle_on_mask = BD71828_MASK_IDLE_EN,
560 			.suspend_on_mask = BD71828_MASK_SUSP_EN,
561 			.lpsr_on_mask = BD71828_MASK_LPSR_EN,
562 		},
563 	}, {
564 		.desc = {
565 			.name = "ldo3",
566 			.of_match = of_match_ptr("LDO3"),
567 			.regulators_node = of_match_ptr("regulators"),
568 			.id = BD71828_LDO3,
569 			.ops = &bd71828_ldo_ops,
570 			.type = REGULATOR_VOLTAGE,
571 			.linear_ranges = bd71828_ldo_volts,
572 			.n_linear_ranges = ARRAY_SIZE(bd71828_ldo_volts),
573 			.n_voltages = BD71828_LDO_VOLTS,
574 			.enable_reg = BD71828_REG_LDO3_EN,
575 			.enable_mask = BD71828_MASK_RUN_EN,
576 			.vsel_reg = BD71828_REG_LDO3_VOLT,
577 			.vsel_mask = BD71828_MASK_LDO_VOLT,
578 			.owner = THIS_MODULE,
579 			.of_parse_cb = buck_set_hw_dvs_levels,
580 		},
581 		.dvs = {
582 			/*
583 			 * LDO3 only supports single voltage for all states.
584 			 * voltage can be individually enabled for each state
585 			 * though => allow setting all states to support
586 			 * enabling power rail on different states.
587 			 */
588 			.level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_IDLE |
589 				     ROHM_DVS_LEVEL_SUSPEND |
590 				     ROHM_DVS_LEVEL_LPSR,
591 			.run_reg = BD71828_REG_LDO3_VOLT,
592 			.idle_reg = BD71828_REG_LDO3_VOLT,
593 			.suspend_reg = BD71828_REG_LDO3_VOLT,
594 			.lpsr_reg = BD71828_REG_LDO3_VOLT,
595 			.run_mask = BD71828_MASK_LDO_VOLT,
596 			.idle_mask = BD71828_MASK_LDO_VOLT,
597 			.suspend_mask = BD71828_MASK_LDO_VOLT,
598 			.lpsr_mask = BD71828_MASK_LDO_VOLT,
599 			.idle_on_mask = BD71828_MASK_IDLE_EN,
600 			.suspend_on_mask = BD71828_MASK_SUSP_EN,
601 			.lpsr_on_mask = BD71828_MASK_LPSR_EN,
602 		},
603 
604 	}, {
605 		.desc = {
606 			.name = "ldo4",
607 			.of_match = of_match_ptr("LDO4"),
608 			.regulators_node = of_match_ptr("regulators"),
609 			.id = BD71828_LDO4,
610 			.ops = &bd71828_ldo_ops,
611 			.type = REGULATOR_VOLTAGE,
612 			.linear_ranges = bd71828_ldo_volts,
613 			.n_linear_ranges = ARRAY_SIZE(bd71828_ldo_volts),
614 			.n_voltages = BD71828_LDO_VOLTS,
615 			.enable_reg = BD71828_REG_LDO4_EN,
616 			.enable_mask = BD71828_MASK_RUN_EN,
617 			.vsel_reg = BD71828_REG_LDO4_VOLT,
618 			.vsel_mask = BD71828_MASK_LDO_VOLT,
619 			.owner = THIS_MODULE,
620 			.of_parse_cb = buck_set_hw_dvs_levels,
621 		},
622 		.dvs = {
623 			/*
624 			 * LDO1 only supports single voltage for all states.
625 			 * voltage can be individually enabled for each state
626 			 * though => allow setting all states to support
627 			 * enabling power rail on different states.
628 			 */
629 			.level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_IDLE |
630 				     ROHM_DVS_LEVEL_SUSPEND |
631 				     ROHM_DVS_LEVEL_LPSR,
632 			.run_reg = BD71828_REG_LDO4_VOLT,
633 			.idle_reg = BD71828_REG_LDO4_VOLT,
634 			.suspend_reg = BD71828_REG_LDO4_VOLT,
635 			.lpsr_reg = BD71828_REG_LDO4_VOLT,
636 			.run_mask = BD71828_MASK_LDO_VOLT,
637 			.idle_mask = BD71828_MASK_LDO_VOLT,
638 			.suspend_mask = BD71828_MASK_LDO_VOLT,
639 			.lpsr_mask = BD71828_MASK_LDO_VOLT,
640 			.idle_on_mask = BD71828_MASK_IDLE_EN,
641 			.suspend_on_mask = BD71828_MASK_SUSP_EN,
642 			.lpsr_on_mask = BD71828_MASK_LPSR_EN,
643 		},
644 	}, {
645 		.desc = {
646 			.name = "ldo5",
647 			.of_match = of_match_ptr("LDO5"),
648 			.regulators_node = of_match_ptr("regulators"),
649 			.id = BD71828_LDO5,
650 			.ops = &bd71828_ldo_ops,
651 			.type = REGULATOR_VOLTAGE,
652 			.linear_ranges = bd71828_ldo_volts,
653 			.n_linear_ranges = ARRAY_SIZE(bd71828_ldo_volts),
654 			.n_voltages = BD71828_LDO_VOLTS,
655 			.enable_reg = BD71828_REG_LDO5_EN,
656 			.enable_mask = BD71828_MASK_RUN_EN,
657 			.vsel_reg = BD71828_REG_LDO5_VOLT,
658 			.vsel_mask = BD71828_MASK_LDO_VOLT,
659 			.of_parse_cb = buck_set_hw_dvs_levels,
660 			.owner = THIS_MODULE,
661 		},
662 		/*
663 		 * LDO5 is special. It can choose vsel settings to be configured
664 		 * from 2 different registers (by GPIO).
665 		 *
666 		 * This driver supports only configuration where
667 		 * BD71828_REG_LDO5_VOLT_L is used.
668 		 */
669 		.dvs = {
670 			.level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_IDLE |
671 				     ROHM_DVS_LEVEL_SUSPEND |
672 				     ROHM_DVS_LEVEL_LPSR,
673 			.run_reg = BD71828_REG_LDO5_VOLT,
674 			.idle_reg = BD71828_REG_LDO5_VOLT,
675 			.suspend_reg = BD71828_REG_LDO5_VOLT,
676 			.lpsr_reg = BD71828_REG_LDO5_VOLT,
677 			.run_mask = BD71828_MASK_LDO_VOLT,
678 			.idle_mask = BD71828_MASK_LDO_VOLT,
679 			.suspend_mask = BD71828_MASK_LDO_VOLT,
680 			.lpsr_mask = BD71828_MASK_LDO_VOLT,
681 			.idle_on_mask = BD71828_MASK_IDLE_EN,
682 			.suspend_on_mask = BD71828_MASK_SUSP_EN,
683 			.lpsr_on_mask = BD71828_MASK_LPSR_EN,
684 		},
685 
686 	}, {
687 		.desc = {
688 			.name = "ldo6",
689 			.of_match = of_match_ptr("LDO6"),
690 			.regulators_node = of_match_ptr("regulators"),
691 			.id = BD71828_LDO6,
692 			.ops = &bd71828_ldo6_ops,
693 			.type = REGULATOR_VOLTAGE,
694 			.fixed_uV = BD71828_LDO_6_VOLTAGE,
695 			.n_voltages = 1,
696 			.enable_reg = BD71828_REG_LDO6_EN,
697 			.enable_mask = BD71828_MASK_RUN_EN,
698 			.owner = THIS_MODULE,
699 			/*
700 			 * LDO6 only supports enable/disable for all states.
701 			 * Voltage for LDO6 is fixed.
702 			 */
703 			.of_parse_cb = ldo6_parse_dt,
704 		},
705 	}, {
706 		.desc = {
707 			/* SNVS LDO in data-sheet */
708 			.name = "ldo7",
709 			.of_match = of_match_ptr("LDO7"),
710 			.regulators_node = of_match_ptr("regulators"),
711 			.id = BD71828_LDO_SNVS,
712 			.ops = &bd71828_ldo_ops,
713 			.type = REGULATOR_VOLTAGE,
714 			.linear_ranges = bd71828_ldo_volts,
715 			.n_linear_ranges = ARRAY_SIZE(bd71828_ldo_volts),
716 			.n_voltages = BD71828_LDO_VOLTS,
717 			.enable_reg = BD71828_REG_LDO7_EN,
718 			.enable_mask = BD71828_MASK_RUN_EN,
719 			.vsel_reg = BD71828_REG_LDO7_VOLT,
720 			.vsel_mask = BD71828_MASK_LDO_VOLT,
721 			.owner = THIS_MODULE,
722 			.of_parse_cb = buck_set_hw_dvs_levels,
723 		},
724 		.dvs = {
725 			/*
726 			 * LDO7 only supports single voltage for all states.
727 			 * voltage can be individually enabled for each state
728 			 * though => allow setting all states to support
729 			 * enabling power rail on different states.
730 			 */
731 			.level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_IDLE |
732 				     ROHM_DVS_LEVEL_SUSPEND |
733 				     ROHM_DVS_LEVEL_LPSR,
734 			.run_reg = BD71828_REG_LDO7_VOLT,
735 			.idle_reg = BD71828_REG_LDO7_VOLT,
736 			.suspend_reg = BD71828_REG_LDO7_VOLT,
737 			.lpsr_reg = BD71828_REG_LDO7_VOLT,
738 			.run_mask = BD71828_MASK_LDO_VOLT,
739 			.idle_mask = BD71828_MASK_LDO_VOLT,
740 			.suspend_mask = BD71828_MASK_LDO_VOLT,
741 			.lpsr_mask = BD71828_MASK_LDO_VOLT,
742 			.idle_on_mask = BD71828_MASK_IDLE_EN,
743 			.suspend_on_mask = BD71828_MASK_SUSP_EN,
744 			.lpsr_on_mask = BD71828_MASK_LPSR_EN,
745 		},
746 
747 	},
748 };
749 
750 static int bd71828_probe(struct platform_device *pdev)
751 {
752 	struct rohm_regmap_dev *bd71828;
753 	int i, j, ret;
754 	struct regulator_config config = {
755 		.dev = pdev->dev.parent,
756 	};
757 
758 	bd71828 = dev_get_drvdata(pdev->dev.parent);
759 	if (!bd71828) {
760 		dev_err(&pdev->dev, "No MFD driver data\n");
761 		return -EINVAL;
762 	}
763 
764 	config.regmap = bd71828->regmap;
765 
766 	for (i = 0; i < ARRAY_SIZE(bd71828_rdata); i++) {
767 		struct regulator_dev *rdev;
768 		const struct bd71828_regulator_data *rd;
769 
770 		rd = &bd71828_rdata[i];
771 		rdev = devm_regulator_register(&pdev->dev,
772 					       &rd->desc, &config);
773 		if (IS_ERR(rdev)) {
774 			dev_err(&pdev->dev,
775 				"failed to register %s regulator\n",
776 				rd->desc.name);
777 			return PTR_ERR(rdev);
778 		}
779 		for (j = 0; j < rd->reg_init_amnt; j++) {
780 			ret = regmap_update_bits(bd71828->regmap,
781 						 rd->reg_inits[j].reg,
782 						 rd->reg_inits[j].mask,
783 						 rd->reg_inits[j].val);
784 			if (ret) {
785 				dev_err(&pdev->dev,
786 					"regulator %s init failed\n",
787 					rd->desc.name);
788 				return ret;
789 			}
790 		}
791 	}
792 	return 0;
793 }
794 
795 static struct platform_driver bd71828_regulator = {
796 	.driver = {
797 		.name = "bd71828-pmic"
798 	},
799 	.probe = bd71828_probe,
800 };
801 
802 module_platform_driver(bd71828_regulator);
803 
804 MODULE_AUTHOR("Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>");
805 MODULE_DESCRIPTION("BD71828 voltage regulator driver");
806 MODULE_LICENSE("GPL");
807 MODULE_ALIAS("platform:bd71828-pmic");
808