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 const unsigned int bd71828_ramp_delay[] = { 2500, 5000, 10000, 20000 };
94 
95 static int buck_set_hw_dvs_levels(struct device_node *np,
96 				  const struct regulator_desc *desc,
97 				  struct regulator_config *cfg)
98 {
99 	struct bd71828_regulator_data *data;
100 
101 	data = container_of(desc, struct bd71828_regulator_data, desc);
102 
103 	return rohm_regulator_set_dvs_levels(&data->dvs, np, desc, cfg->regmap);
104 }
105 
106 static int ldo6_parse_dt(struct device_node *np,
107 			 const struct regulator_desc *desc,
108 			 struct regulator_config *cfg)
109 {
110 	int ret, i;
111 	uint32_t uv = 0;
112 	unsigned int en;
113 	struct regmap *regmap = cfg->regmap;
114 	static const char * const props[] = { "rohm,dvs-run-voltage",
115 					      "rohm,dvs-idle-voltage",
116 					      "rohm,dvs-suspend-voltage",
117 					      "rohm,dvs-lpsr-voltage" };
118 	unsigned int mask[] = { BD71828_MASK_RUN_EN, BD71828_MASK_IDLE_EN,
119 			       BD71828_MASK_SUSP_EN, BD71828_MASK_LPSR_EN };
120 
121 	for (i = 0; i < ARRAY_SIZE(props); i++) {
122 		ret = of_property_read_u32(np, props[i], &uv);
123 		if (ret) {
124 			if (ret != -EINVAL)
125 				return ret;
126 			continue;
127 		}
128 		if (uv)
129 			en = 0xffffffff;
130 		else
131 			en = 0;
132 
133 		ret = regmap_update_bits(regmap, desc->enable_reg, mask[i], en);
134 		if (ret)
135 			return ret;
136 	}
137 	return 0;
138 }
139 
140 static const struct regulator_ops bd71828_buck_ops = {
141 	.enable = regulator_enable_regmap,
142 	.disable = regulator_disable_regmap,
143 	.is_enabled = regulator_is_enabled_regmap,
144 	.list_voltage = regulator_list_voltage_linear_range,
145 	.set_voltage_sel = regulator_set_voltage_sel_regmap,
146 	.get_voltage_sel = regulator_get_voltage_sel_regmap,
147 };
148 
149 static const struct regulator_ops bd71828_dvs_buck_ops = {
150 	.enable = regulator_enable_regmap,
151 	.disable = regulator_disable_regmap,
152 	.is_enabled = regulator_is_enabled_regmap,
153 	.list_voltage = regulator_list_voltage_linear_range,
154 	.set_voltage_sel = regulator_set_voltage_sel_regmap,
155 	.get_voltage_sel = regulator_get_voltage_sel_regmap,
156 	.set_voltage_time_sel = regulator_set_voltage_time_sel,
157 	.set_ramp_delay = regulator_set_ramp_delay_regmap,
158 };
159 
160 static const struct regulator_ops bd71828_ldo_ops = {
161 	.enable = regulator_enable_regmap,
162 	.disable = regulator_disable_regmap,
163 	.is_enabled = regulator_is_enabled_regmap,
164 	.list_voltage = regulator_list_voltage_linear_range,
165 	.set_voltage_sel = regulator_set_voltage_sel_regmap,
166 	.get_voltage_sel = regulator_get_voltage_sel_regmap,
167 };
168 
169 static const struct regulator_ops bd71828_ldo6_ops = {
170 	.enable = regulator_enable_regmap,
171 	.disable = regulator_disable_regmap,
172 	.is_enabled = regulator_is_enabled_regmap,
173 };
174 
175 static const struct bd71828_regulator_data bd71828_rdata[] = {
176 	{
177 		.desc = {
178 			.name = "buck1",
179 			.of_match = of_match_ptr("BUCK1"),
180 			.regulators_node = of_match_ptr("regulators"),
181 			.id = BD71828_BUCK1,
182 			.ops = &bd71828_dvs_buck_ops,
183 			.type = REGULATOR_VOLTAGE,
184 			.linear_ranges = bd71828_buck1267_volts,
185 			.n_linear_ranges = ARRAY_SIZE(bd71828_buck1267_volts),
186 			.n_voltages = BD71828_BUCK1267_VOLTS,
187 			.enable_reg = BD71828_REG_BUCK1_EN,
188 			.enable_mask = BD71828_MASK_RUN_EN,
189 			.vsel_reg = BD71828_REG_BUCK1_VOLT,
190 			.vsel_mask = BD71828_MASK_BUCK1267_VOLT,
191 			.ramp_delay_table = bd71828_ramp_delay,
192 			.n_ramp_values = ARRAY_SIZE(bd71828_ramp_delay),
193 			.ramp_reg = BD71828_REG_BUCK1_MODE,
194 			.ramp_mask = BD71828_MASK_RAMP_DELAY,
195 			.owner = THIS_MODULE,
196 			.of_parse_cb = buck_set_hw_dvs_levels,
197 		},
198 		.dvs = {
199 			.level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_IDLE |
200 				     ROHM_DVS_LEVEL_SUSPEND |
201 				     ROHM_DVS_LEVEL_LPSR,
202 			.run_reg = BD71828_REG_BUCK1_VOLT,
203 			.run_mask = BD71828_MASK_BUCK1267_VOLT,
204 			.idle_reg = BD71828_REG_BUCK1_IDLE_VOLT,
205 			.idle_mask = BD71828_MASK_BUCK1267_VOLT,
206 			.idle_on_mask = BD71828_MASK_IDLE_EN,
207 			.suspend_reg = BD71828_REG_BUCK1_SUSP_VOLT,
208 			.suspend_mask = BD71828_MASK_BUCK1267_VOLT,
209 			.suspend_on_mask = BD71828_MASK_SUSP_EN,
210 			.lpsr_on_mask = BD71828_MASK_LPSR_EN,
211 			/*
212 			 * LPSR voltage is same as SUSPEND voltage. Allow
213 			 * setting it so that regulator can be set enabled at
214 			 * LPSR state
215 			 */
216 			.lpsr_reg = BD71828_REG_BUCK1_SUSP_VOLT,
217 			.lpsr_mask = BD71828_MASK_BUCK1267_VOLT,
218 		},
219 		.reg_inits = buck1_inits,
220 		.reg_init_amnt = ARRAY_SIZE(buck1_inits),
221 	},
222 	{
223 		.desc = {
224 			.name = "buck2",
225 			.of_match = of_match_ptr("BUCK2"),
226 			.regulators_node = of_match_ptr("regulators"),
227 			.id = BD71828_BUCK2,
228 			.ops = &bd71828_dvs_buck_ops,
229 			.type = REGULATOR_VOLTAGE,
230 			.linear_ranges = bd71828_buck1267_volts,
231 			.n_linear_ranges = ARRAY_SIZE(bd71828_buck1267_volts),
232 			.n_voltages = BD71828_BUCK1267_VOLTS,
233 			.enable_reg = BD71828_REG_BUCK2_EN,
234 			.enable_mask = BD71828_MASK_RUN_EN,
235 			.vsel_reg = BD71828_REG_BUCK2_VOLT,
236 			.vsel_mask = BD71828_MASK_BUCK1267_VOLT,
237 			.ramp_delay_table = bd71828_ramp_delay,
238 			.n_ramp_values = ARRAY_SIZE(bd71828_ramp_delay),
239 			.ramp_reg = BD71828_REG_BUCK2_MODE,
240 			.ramp_mask = BD71828_MASK_RAMP_DELAY,
241 			.owner = THIS_MODULE,
242 			.of_parse_cb = buck_set_hw_dvs_levels,
243 		},
244 		.dvs = {
245 			.level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_IDLE |
246 				     ROHM_DVS_LEVEL_SUSPEND |
247 				     ROHM_DVS_LEVEL_LPSR,
248 			.run_reg = BD71828_REG_BUCK2_VOLT,
249 			.run_mask = BD71828_MASK_BUCK1267_VOLT,
250 			.idle_reg = BD71828_REG_BUCK2_IDLE_VOLT,
251 			.idle_mask = BD71828_MASK_BUCK1267_VOLT,
252 			.idle_on_mask = BD71828_MASK_IDLE_EN,
253 			.suspend_reg = BD71828_REG_BUCK2_SUSP_VOLT,
254 			.suspend_mask = BD71828_MASK_BUCK1267_VOLT,
255 			.suspend_on_mask = BD71828_MASK_SUSP_EN,
256 			.lpsr_on_mask = BD71828_MASK_LPSR_EN,
257 			.lpsr_reg = BD71828_REG_BUCK2_SUSP_VOLT,
258 			.lpsr_mask = BD71828_MASK_BUCK1267_VOLT,
259 		},
260 		.reg_inits = buck2_inits,
261 		.reg_init_amnt = ARRAY_SIZE(buck2_inits),
262 	},
263 	{
264 		.desc = {
265 			.name = "buck3",
266 			.of_match = of_match_ptr("BUCK3"),
267 			.regulators_node = of_match_ptr("regulators"),
268 			.id = BD71828_BUCK3,
269 			.ops = &bd71828_buck_ops,
270 			.type = REGULATOR_VOLTAGE,
271 			.linear_ranges = bd71828_buck3_volts,
272 			.n_linear_ranges = ARRAY_SIZE(bd71828_buck3_volts),
273 			.n_voltages = BD71828_BUCK3_VOLTS,
274 			.enable_reg = BD71828_REG_BUCK3_EN,
275 			.enable_mask = BD71828_MASK_RUN_EN,
276 			.vsel_reg = BD71828_REG_BUCK3_VOLT,
277 			.vsel_mask = BD71828_MASK_BUCK3_VOLT,
278 			.owner = THIS_MODULE,
279 			.of_parse_cb = buck_set_hw_dvs_levels,
280 		},
281 		.dvs = {
282 			/*
283 			 * BUCK3 only supports single voltage for all states.
284 			 * voltage can be individually enabled for each state
285 			 * though => allow setting all states to support
286 			 * enabling power rail on different states.
287 			 */
288 			.level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_IDLE |
289 				     ROHM_DVS_LEVEL_SUSPEND |
290 				     ROHM_DVS_LEVEL_LPSR,
291 			.run_reg = BD71828_REG_BUCK3_VOLT,
292 			.idle_reg = BD71828_REG_BUCK3_VOLT,
293 			.suspend_reg = BD71828_REG_BUCK3_VOLT,
294 			.lpsr_reg = BD71828_REG_BUCK3_VOLT,
295 			.run_mask = BD71828_MASK_BUCK3_VOLT,
296 			.idle_mask = BD71828_MASK_BUCK3_VOLT,
297 			.suspend_mask = BD71828_MASK_BUCK3_VOLT,
298 			.lpsr_mask = BD71828_MASK_BUCK3_VOLT,
299 			.idle_on_mask = BD71828_MASK_IDLE_EN,
300 			.suspend_on_mask = BD71828_MASK_SUSP_EN,
301 			.lpsr_on_mask = BD71828_MASK_LPSR_EN,
302 		},
303 	},
304 	{
305 		.desc = {
306 			.name = "buck4",
307 			.of_match = of_match_ptr("BUCK4"),
308 			.regulators_node = of_match_ptr("regulators"),
309 			.id = BD71828_BUCK4,
310 			.ops = &bd71828_buck_ops,
311 			.type = REGULATOR_VOLTAGE,
312 			.linear_ranges = bd71828_buck4_volts,
313 			.n_linear_ranges = ARRAY_SIZE(bd71828_buck4_volts),
314 			.n_voltages = BD71828_BUCK4_VOLTS,
315 			.enable_reg = BD71828_REG_BUCK4_EN,
316 			.enable_mask = BD71828_MASK_RUN_EN,
317 			.vsel_reg = BD71828_REG_BUCK4_VOLT,
318 			.vsel_mask = BD71828_MASK_BUCK4_VOLT,
319 			.owner = THIS_MODULE,
320 			.of_parse_cb = buck_set_hw_dvs_levels,
321 		},
322 		.dvs = {
323 			/*
324 			 * BUCK4 only supports single voltage for all states.
325 			 * voltage can be individually enabled for each state
326 			 * though => allow setting all states to support
327 			 * enabling power rail on different states.
328 			 */
329 			.level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_IDLE |
330 				     ROHM_DVS_LEVEL_SUSPEND |
331 				     ROHM_DVS_LEVEL_LPSR,
332 			.run_reg = BD71828_REG_BUCK4_VOLT,
333 			.idle_reg = BD71828_REG_BUCK4_VOLT,
334 			.suspend_reg = BD71828_REG_BUCK4_VOLT,
335 			.lpsr_reg = BD71828_REG_BUCK4_VOLT,
336 			.run_mask = BD71828_MASK_BUCK4_VOLT,
337 			.idle_mask = BD71828_MASK_BUCK4_VOLT,
338 			.suspend_mask = BD71828_MASK_BUCK4_VOLT,
339 			.lpsr_mask = BD71828_MASK_BUCK4_VOLT,
340 			.idle_on_mask = BD71828_MASK_IDLE_EN,
341 			.suspend_on_mask = BD71828_MASK_SUSP_EN,
342 			.lpsr_on_mask = BD71828_MASK_LPSR_EN,
343 		},
344 	},
345 	{
346 		.desc = {
347 			.name = "buck5",
348 			.of_match = of_match_ptr("BUCK5"),
349 			.regulators_node = of_match_ptr("regulators"),
350 			.id = BD71828_BUCK5,
351 			.ops = &bd71828_buck_ops,
352 			.type = REGULATOR_VOLTAGE,
353 			.linear_ranges = bd71828_buck5_volts,
354 			.n_linear_ranges = ARRAY_SIZE(bd71828_buck5_volts),
355 			.n_voltages = BD71828_BUCK5_VOLTS,
356 			.enable_reg = BD71828_REG_BUCK5_EN,
357 			.enable_mask = BD71828_MASK_RUN_EN,
358 			.vsel_reg = BD71828_REG_BUCK5_VOLT,
359 			.vsel_mask = BD71828_MASK_BUCK5_VOLT,
360 			.owner = THIS_MODULE,
361 			.of_parse_cb = buck_set_hw_dvs_levels,
362 		},
363 		.dvs = {
364 			/*
365 			 * BUCK5 only supports single voltage for all states.
366 			 * voltage can be individually enabled for each state
367 			 * though => allow setting all states to support
368 			 * enabling power rail on different states.
369 			 */
370 			.level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_IDLE |
371 				     ROHM_DVS_LEVEL_SUSPEND |
372 				     ROHM_DVS_LEVEL_LPSR,
373 			.run_reg = BD71828_REG_BUCK5_VOLT,
374 			.idle_reg = BD71828_REG_BUCK5_VOLT,
375 			.suspend_reg = BD71828_REG_BUCK5_VOLT,
376 			.lpsr_reg = BD71828_REG_BUCK5_VOLT,
377 			.run_mask = BD71828_MASK_BUCK5_VOLT,
378 			.idle_mask = BD71828_MASK_BUCK5_VOLT,
379 			.suspend_mask = BD71828_MASK_BUCK5_VOLT,
380 			.lpsr_mask = BD71828_MASK_BUCK5_VOLT,
381 			.idle_on_mask = BD71828_MASK_IDLE_EN,
382 			.suspend_on_mask = BD71828_MASK_SUSP_EN,
383 			.lpsr_on_mask = BD71828_MASK_LPSR_EN,
384 		},
385 	},
386 	{
387 		.desc = {
388 			.name = "buck6",
389 			.of_match = of_match_ptr("BUCK6"),
390 			.regulators_node = of_match_ptr("regulators"),
391 			.id = BD71828_BUCK6,
392 			.ops = &bd71828_dvs_buck_ops,
393 			.type = REGULATOR_VOLTAGE,
394 			.linear_ranges = bd71828_buck1267_volts,
395 			.n_linear_ranges = ARRAY_SIZE(bd71828_buck1267_volts),
396 			.n_voltages = BD71828_BUCK1267_VOLTS,
397 			.enable_reg = BD71828_REG_BUCK6_EN,
398 			.enable_mask = BD71828_MASK_RUN_EN,
399 			.vsel_reg = BD71828_REG_BUCK6_VOLT,
400 			.vsel_mask = BD71828_MASK_BUCK1267_VOLT,
401 			.ramp_delay_table = bd71828_ramp_delay,
402 			.n_ramp_values = ARRAY_SIZE(bd71828_ramp_delay),
403 			.ramp_reg = BD71828_REG_BUCK6_MODE,
404 			.ramp_mask = BD71828_MASK_RAMP_DELAY,
405 			.owner = THIS_MODULE,
406 			.of_parse_cb = buck_set_hw_dvs_levels,
407 		},
408 		.dvs = {
409 			.level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_IDLE |
410 				     ROHM_DVS_LEVEL_SUSPEND |
411 				     ROHM_DVS_LEVEL_LPSR,
412 			.run_reg = BD71828_REG_BUCK6_VOLT,
413 			.run_mask = BD71828_MASK_BUCK1267_VOLT,
414 			.idle_reg = BD71828_REG_BUCK6_IDLE_VOLT,
415 			.idle_mask = BD71828_MASK_BUCK1267_VOLT,
416 			.idle_on_mask = BD71828_MASK_IDLE_EN,
417 			.suspend_reg = BD71828_REG_BUCK6_SUSP_VOLT,
418 			.suspend_mask = BD71828_MASK_BUCK1267_VOLT,
419 			.suspend_on_mask = BD71828_MASK_SUSP_EN,
420 			.lpsr_on_mask = BD71828_MASK_LPSR_EN,
421 			.lpsr_reg = BD71828_REG_BUCK6_SUSP_VOLT,
422 			.lpsr_mask = BD71828_MASK_BUCK1267_VOLT,
423 		},
424 		.reg_inits = buck6_inits,
425 		.reg_init_amnt = ARRAY_SIZE(buck6_inits),
426 	},
427 	{
428 		.desc = {
429 			.name = "buck7",
430 			.of_match = of_match_ptr("BUCK7"),
431 			.regulators_node = of_match_ptr("regulators"),
432 			.id = BD71828_BUCK7,
433 			.ops = &bd71828_dvs_buck_ops,
434 			.type = REGULATOR_VOLTAGE,
435 			.linear_ranges = bd71828_buck1267_volts,
436 			.n_linear_ranges = ARRAY_SIZE(bd71828_buck1267_volts),
437 			.n_voltages = BD71828_BUCK1267_VOLTS,
438 			.enable_reg = BD71828_REG_BUCK7_EN,
439 			.enable_mask = BD71828_MASK_RUN_EN,
440 			.vsel_reg = BD71828_REG_BUCK7_VOLT,
441 			.vsel_mask = BD71828_MASK_BUCK1267_VOLT,
442 			.ramp_delay_table = bd71828_ramp_delay,
443 			.n_ramp_values = ARRAY_SIZE(bd71828_ramp_delay),
444 			.ramp_reg = BD71828_REG_BUCK7_MODE,
445 			.ramp_mask = BD71828_MASK_RAMP_DELAY,
446 			.owner = THIS_MODULE,
447 			.of_parse_cb = buck_set_hw_dvs_levels,
448 		},
449 		.dvs = {
450 			.level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_IDLE |
451 				     ROHM_DVS_LEVEL_SUSPEND |
452 				     ROHM_DVS_LEVEL_LPSR,
453 			.run_reg = BD71828_REG_BUCK7_VOLT,
454 			.run_mask = BD71828_MASK_BUCK1267_VOLT,
455 			.idle_reg = BD71828_REG_BUCK7_IDLE_VOLT,
456 			.idle_mask = BD71828_MASK_BUCK1267_VOLT,
457 			.idle_on_mask = BD71828_MASK_IDLE_EN,
458 			.suspend_reg = BD71828_REG_BUCK7_SUSP_VOLT,
459 			.suspend_mask = BD71828_MASK_BUCK1267_VOLT,
460 			.suspend_on_mask = BD71828_MASK_SUSP_EN,
461 			.lpsr_on_mask = BD71828_MASK_LPSR_EN,
462 			.lpsr_reg = BD71828_REG_BUCK7_SUSP_VOLT,
463 			.lpsr_mask = BD71828_MASK_BUCK1267_VOLT,
464 		},
465 		.reg_inits = buck7_inits,
466 		.reg_init_amnt = ARRAY_SIZE(buck7_inits),
467 	},
468 	{
469 		.desc = {
470 			.name = "ldo1",
471 			.of_match = of_match_ptr("LDO1"),
472 			.regulators_node = of_match_ptr("regulators"),
473 			.id = BD71828_LDO1,
474 			.ops = &bd71828_ldo_ops,
475 			.type = REGULATOR_VOLTAGE,
476 			.linear_ranges = bd71828_ldo_volts,
477 			.n_linear_ranges = ARRAY_SIZE(bd71828_ldo_volts),
478 			.n_voltages = BD71828_LDO_VOLTS,
479 			.enable_reg = BD71828_REG_LDO1_EN,
480 			.enable_mask = BD71828_MASK_RUN_EN,
481 			.vsel_reg = BD71828_REG_LDO1_VOLT,
482 			.vsel_mask = BD71828_MASK_LDO_VOLT,
483 			.owner = THIS_MODULE,
484 			.of_parse_cb = buck_set_hw_dvs_levels,
485 		},
486 		.dvs = {
487 			/*
488 			 * LDO1 only supports single voltage for all states.
489 			 * voltage can be individually enabled for each state
490 			 * though => allow setting all states to support
491 			 * enabling power rail on different states.
492 			 */
493 			.level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_IDLE |
494 				     ROHM_DVS_LEVEL_SUSPEND |
495 				     ROHM_DVS_LEVEL_LPSR,
496 			.run_reg = BD71828_REG_LDO1_VOLT,
497 			.idle_reg = BD71828_REG_LDO1_VOLT,
498 			.suspend_reg = BD71828_REG_LDO1_VOLT,
499 			.lpsr_reg = BD71828_REG_LDO1_VOLT,
500 			.run_mask = BD71828_MASK_LDO_VOLT,
501 			.idle_mask = BD71828_MASK_LDO_VOLT,
502 			.suspend_mask = BD71828_MASK_LDO_VOLT,
503 			.lpsr_mask = BD71828_MASK_LDO_VOLT,
504 			.idle_on_mask = BD71828_MASK_IDLE_EN,
505 			.suspend_on_mask = BD71828_MASK_SUSP_EN,
506 			.lpsr_on_mask = BD71828_MASK_LPSR_EN,
507 		},
508 	}, {
509 		.desc = {
510 			.name = "ldo2",
511 			.of_match = of_match_ptr("LDO2"),
512 			.regulators_node = of_match_ptr("regulators"),
513 			.id = BD71828_LDO2,
514 			.ops = &bd71828_ldo_ops,
515 			.type = REGULATOR_VOLTAGE,
516 			.linear_ranges = bd71828_ldo_volts,
517 			.n_linear_ranges = ARRAY_SIZE(bd71828_ldo_volts),
518 			.n_voltages = BD71828_LDO_VOLTS,
519 			.enable_reg = BD71828_REG_LDO2_EN,
520 			.enable_mask = BD71828_MASK_RUN_EN,
521 			.vsel_reg = BD71828_REG_LDO2_VOLT,
522 			.vsel_mask = BD71828_MASK_LDO_VOLT,
523 			.owner = THIS_MODULE,
524 			.of_parse_cb = buck_set_hw_dvs_levels,
525 		},
526 		.dvs = {
527 			/*
528 			 * LDO2 only supports single voltage for all states.
529 			 * voltage can be individually enabled for each state
530 			 * though => allow setting all states to support
531 			 * enabling power rail on different states.
532 			 */
533 			.level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_IDLE |
534 				     ROHM_DVS_LEVEL_SUSPEND |
535 				     ROHM_DVS_LEVEL_LPSR,
536 			.run_reg = BD71828_REG_LDO2_VOLT,
537 			.idle_reg = BD71828_REG_LDO2_VOLT,
538 			.suspend_reg = BD71828_REG_LDO2_VOLT,
539 			.lpsr_reg = BD71828_REG_LDO2_VOLT,
540 			.run_mask = BD71828_MASK_LDO_VOLT,
541 			.idle_mask = BD71828_MASK_LDO_VOLT,
542 			.suspend_mask = BD71828_MASK_LDO_VOLT,
543 			.lpsr_mask = BD71828_MASK_LDO_VOLT,
544 			.idle_on_mask = BD71828_MASK_IDLE_EN,
545 			.suspend_on_mask = BD71828_MASK_SUSP_EN,
546 			.lpsr_on_mask = BD71828_MASK_LPSR_EN,
547 		},
548 	}, {
549 		.desc = {
550 			.name = "ldo3",
551 			.of_match = of_match_ptr("LDO3"),
552 			.regulators_node = of_match_ptr("regulators"),
553 			.id = BD71828_LDO3,
554 			.ops = &bd71828_ldo_ops,
555 			.type = REGULATOR_VOLTAGE,
556 			.linear_ranges = bd71828_ldo_volts,
557 			.n_linear_ranges = ARRAY_SIZE(bd71828_ldo_volts),
558 			.n_voltages = BD71828_LDO_VOLTS,
559 			.enable_reg = BD71828_REG_LDO3_EN,
560 			.enable_mask = BD71828_MASK_RUN_EN,
561 			.vsel_reg = BD71828_REG_LDO3_VOLT,
562 			.vsel_mask = BD71828_MASK_LDO_VOLT,
563 			.owner = THIS_MODULE,
564 			.of_parse_cb = buck_set_hw_dvs_levels,
565 		},
566 		.dvs = {
567 			/*
568 			 * LDO3 only supports single voltage for all states.
569 			 * voltage can be individually enabled for each state
570 			 * though => allow setting all states to support
571 			 * enabling power rail on different states.
572 			 */
573 			.level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_IDLE |
574 				     ROHM_DVS_LEVEL_SUSPEND |
575 				     ROHM_DVS_LEVEL_LPSR,
576 			.run_reg = BD71828_REG_LDO3_VOLT,
577 			.idle_reg = BD71828_REG_LDO3_VOLT,
578 			.suspend_reg = BD71828_REG_LDO3_VOLT,
579 			.lpsr_reg = BD71828_REG_LDO3_VOLT,
580 			.run_mask = BD71828_MASK_LDO_VOLT,
581 			.idle_mask = BD71828_MASK_LDO_VOLT,
582 			.suspend_mask = BD71828_MASK_LDO_VOLT,
583 			.lpsr_mask = BD71828_MASK_LDO_VOLT,
584 			.idle_on_mask = BD71828_MASK_IDLE_EN,
585 			.suspend_on_mask = BD71828_MASK_SUSP_EN,
586 			.lpsr_on_mask = BD71828_MASK_LPSR_EN,
587 		},
588 
589 	}, {
590 		.desc = {
591 			.name = "ldo4",
592 			.of_match = of_match_ptr("LDO4"),
593 			.regulators_node = of_match_ptr("regulators"),
594 			.id = BD71828_LDO4,
595 			.ops = &bd71828_ldo_ops,
596 			.type = REGULATOR_VOLTAGE,
597 			.linear_ranges = bd71828_ldo_volts,
598 			.n_linear_ranges = ARRAY_SIZE(bd71828_ldo_volts),
599 			.n_voltages = BD71828_LDO_VOLTS,
600 			.enable_reg = BD71828_REG_LDO4_EN,
601 			.enable_mask = BD71828_MASK_RUN_EN,
602 			.vsel_reg = BD71828_REG_LDO4_VOLT,
603 			.vsel_mask = BD71828_MASK_LDO_VOLT,
604 			.owner = THIS_MODULE,
605 			.of_parse_cb = buck_set_hw_dvs_levels,
606 		},
607 		.dvs = {
608 			/*
609 			 * LDO1 only supports single voltage for all states.
610 			 * voltage can be individually enabled for each state
611 			 * though => allow setting all states to support
612 			 * enabling power rail on different states.
613 			 */
614 			.level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_IDLE |
615 				     ROHM_DVS_LEVEL_SUSPEND |
616 				     ROHM_DVS_LEVEL_LPSR,
617 			.run_reg = BD71828_REG_LDO4_VOLT,
618 			.idle_reg = BD71828_REG_LDO4_VOLT,
619 			.suspend_reg = BD71828_REG_LDO4_VOLT,
620 			.lpsr_reg = BD71828_REG_LDO4_VOLT,
621 			.run_mask = BD71828_MASK_LDO_VOLT,
622 			.idle_mask = BD71828_MASK_LDO_VOLT,
623 			.suspend_mask = BD71828_MASK_LDO_VOLT,
624 			.lpsr_mask = BD71828_MASK_LDO_VOLT,
625 			.idle_on_mask = BD71828_MASK_IDLE_EN,
626 			.suspend_on_mask = BD71828_MASK_SUSP_EN,
627 			.lpsr_on_mask = BD71828_MASK_LPSR_EN,
628 		},
629 	}, {
630 		.desc = {
631 			.name = "ldo5",
632 			.of_match = of_match_ptr("LDO5"),
633 			.regulators_node = of_match_ptr("regulators"),
634 			.id = BD71828_LDO5,
635 			.ops = &bd71828_ldo_ops,
636 			.type = REGULATOR_VOLTAGE,
637 			.linear_ranges = bd71828_ldo_volts,
638 			.n_linear_ranges = ARRAY_SIZE(bd71828_ldo_volts),
639 			.n_voltages = BD71828_LDO_VOLTS,
640 			.enable_reg = BD71828_REG_LDO5_EN,
641 			.enable_mask = BD71828_MASK_RUN_EN,
642 			.vsel_reg = BD71828_REG_LDO5_VOLT,
643 			.vsel_mask = BD71828_MASK_LDO_VOLT,
644 			.of_parse_cb = buck_set_hw_dvs_levels,
645 			.owner = THIS_MODULE,
646 		},
647 		/*
648 		 * LDO5 is special. It can choose vsel settings to be configured
649 		 * from 2 different registers (by GPIO).
650 		 *
651 		 * This driver supports only configuration where
652 		 * BD71828_REG_LDO5_VOLT_L is used.
653 		 */
654 		.dvs = {
655 			.level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_IDLE |
656 				     ROHM_DVS_LEVEL_SUSPEND |
657 				     ROHM_DVS_LEVEL_LPSR,
658 			.run_reg = BD71828_REG_LDO5_VOLT,
659 			.idle_reg = BD71828_REG_LDO5_VOLT,
660 			.suspend_reg = BD71828_REG_LDO5_VOLT,
661 			.lpsr_reg = BD71828_REG_LDO5_VOLT,
662 			.run_mask = BD71828_MASK_LDO_VOLT,
663 			.idle_mask = BD71828_MASK_LDO_VOLT,
664 			.suspend_mask = BD71828_MASK_LDO_VOLT,
665 			.lpsr_mask = BD71828_MASK_LDO_VOLT,
666 			.idle_on_mask = BD71828_MASK_IDLE_EN,
667 			.suspend_on_mask = BD71828_MASK_SUSP_EN,
668 			.lpsr_on_mask = BD71828_MASK_LPSR_EN,
669 		},
670 
671 	}, {
672 		.desc = {
673 			.name = "ldo6",
674 			.of_match = of_match_ptr("LDO6"),
675 			.regulators_node = of_match_ptr("regulators"),
676 			.id = BD71828_LDO6,
677 			.ops = &bd71828_ldo6_ops,
678 			.type = REGULATOR_VOLTAGE,
679 			.fixed_uV = BD71828_LDO_6_VOLTAGE,
680 			.n_voltages = 1,
681 			.enable_reg = BD71828_REG_LDO6_EN,
682 			.enable_mask = BD71828_MASK_RUN_EN,
683 			.owner = THIS_MODULE,
684 			/*
685 			 * LDO6 only supports enable/disable for all states.
686 			 * Voltage for LDO6 is fixed.
687 			 */
688 			.of_parse_cb = ldo6_parse_dt,
689 		},
690 	}, {
691 		.desc = {
692 			/* SNVS LDO in data-sheet */
693 			.name = "ldo7",
694 			.of_match = of_match_ptr("LDO7"),
695 			.regulators_node = of_match_ptr("regulators"),
696 			.id = BD71828_LDO_SNVS,
697 			.ops = &bd71828_ldo_ops,
698 			.type = REGULATOR_VOLTAGE,
699 			.linear_ranges = bd71828_ldo_volts,
700 			.n_linear_ranges = ARRAY_SIZE(bd71828_ldo_volts),
701 			.n_voltages = BD71828_LDO_VOLTS,
702 			.enable_reg = BD71828_REG_LDO7_EN,
703 			.enable_mask = BD71828_MASK_RUN_EN,
704 			.vsel_reg = BD71828_REG_LDO7_VOLT,
705 			.vsel_mask = BD71828_MASK_LDO_VOLT,
706 			.owner = THIS_MODULE,
707 			.of_parse_cb = buck_set_hw_dvs_levels,
708 		},
709 		.dvs = {
710 			/*
711 			 * LDO7 only supports single voltage for all states.
712 			 * voltage can be individually enabled for each state
713 			 * though => allow setting all states to support
714 			 * enabling power rail on different states.
715 			 */
716 			.level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_IDLE |
717 				     ROHM_DVS_LEVEL_SUSPEND |
718 				     ROHM_DVS_LEVEL_LPSR,
719 			.run_reg = BD71828_REG_LDO7_VOLT,
720 			.idle_reg = BD71828_REG_LDO7_VOLT,
721 			.suspend_reg = BD71828_REG_LDO7_VOLT,
722 			.lpsr_reg = BD71828_REG_LDO7_VOLT,
723 			.run_mask = BD71828_MASK_LDO_VOLT,
724 			.idle_mask = BD71828_MASK_LDO_VOLT,
725 			.suspend_mask = BD71828_MASK_LDO_VOLT,
726 			.lpsr_mask = BD71828_MASK_LDO_VOLT,
727 			.idle_on_mask = BD71828_MASK_IDLE_EN,
728 			.suspend_on_mask = BD71828_MASK_SUSP_EN,
729 			.lpsr_on_mask = BD71828_MASK_LPSR_EN,
730 		},
731 
732 	},
733 };
734 
735 static int bd71828_probe(struct platform_device *pdev)
736 {
737 	int i, j, ret;
738 	struct regulator_config config = {
739 		.dev = pdev->dev.parent,
740 	};
741 
742 	config.regmap = dev_get_regmap(pdev->dev.parent, NULL);
743 	if (!config.regmap)
744 		return -ENODEV;
745 
746 	for (i = 0; i < ARRAY_SIZE(bd71828_rdata); i++) {
747 		struct regulator_dev *rdev;
748 		const struct bd71828_regulator_data *rd;
749 
750 		rd = &bd71828_rdata[i];
751 		rdev = devm_regulator_register(&pdev->dev,
752 					       &rd->desc, &config);
753 		if (IS_ERR(rdev))
754 			return dev_err_probe(&pdev->dev, PTR_ERR(rdev),
755 					     "failed to register %s regulator\n",
756 					     rd->desc.name);
757 
758 		for (j = 0; j < rd->reg_init_amnt; j++) {
759 			ret = regmap_update_bits(config.regmap,
760 						 rd->reg_inits[j].reg,
761 						 rd->reg_inits[j].mask,
762 						 rd->reg_inits[j].val);
763 			if (ret)
764 				return dev_err_probe(&pdev->dev, ret,
765 						     "regulator %s init failed\n",
766 						     rd->desc.name);
767 		}
768 	}
769 	return 0;
770 }
771 
772 static struct platform_driver bd71828_regulator = {
773 	.driver = {
774 		.name = "bd71828-pmic",
775 		.probe_type = PROBE_PREFER_ASYNCHRONOUS,
776 	},
777 	.probe = bd71828_probe,
778 };
779 
780 module_platform_driver(bd71828_regulator);
781 
782 MODULE_AUTHOR("Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>");
783 MODULE_DESCRIPTION("BD71828 voltage regulator driver");
784 MODULE_LICENSE("GPL");
785 MODULE_ALIAS("platform:bd71828-pmic");
786