1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  * Voltage regulator support for AMS AS3722 PMIC
4  *
5  * Copyright (C) 2013 ams
6  *
7  * Author: Florian Lobmaier <florian.lobmaier@ams.com>
8  * Author: Laxman Dewangan <ldewangan@nvidia.com>
9  */
10 
11 #include <linux/err.h>
12 #include <linux/kernel.h>
13 #include <linux/module.h>
14 #include <linux/mfd/as3722.h>
15 #include <linux/of.h>
16 #include <linux/of_platform.h>
17 #include <linux/platform_device.h>
18 #include <linux/regulator/driver.h>
19 #include <linux/regulator/machine.h>
20 #include <linux/regulator/of_regulator.h>
21 #include <linux/slab.h>
22 
23 /* Regulator IDs */
24 enum as3722_regulators_id {
25 	AS3722_REGULATOR_ID_SD0,
26 	AS3722_REGULATOR_ID_SD1,
27 	AS3722_REGULATOR_ID_SD2,
28 	AS3722_REGULATOR_ID_SD3,
29 	AS3722_REGULATOR_ID_SD4,
30 	AS3722_REGULATOR_ID_SD5,
31 	AS3722_REGULATOR_ID_SD6,
32 	AS3722_REGULATOR_ID_LDO0,
33 	AS3722_REGULATOR_ID_LDO1,
34 	AS3722_REGULATOR_ID_LDO2,
35 	AS3722_REGULATOR_ID_LDO3,
36 	AS3722_REGULATOR_ID_LDO4,
37 	AS3722_REGULATOR_ID_LDO5,
38 	AS3722_REGULATOR_ID_LDO6,
39 	AS3722_REGULATOR_ID_LDO7,
40 	AS3722_REGULATOR_ID_LDO9,
41 	AS3722_REGULATOR_ID_LDO10,
42 	AS3722_REGULATOR_ID_LDO11,
43 	AS3722_REGULATOR_ID_MAX,
44 };
45 
46 struct as3722_register_mapping {
47 	u8 regulator_id;
48 	const char *name;
49 	const char *sname;
50 	u8 vsel_reg;
51 	u8 vsel_mask;
52 	int n_voltages;
53 	u32 enable_reg;
54 	u8 enable_mask;
55 	u32 control_reg;
56 	u8 mode_mask;
57 	u32 sleep_ctrl_reg;
58 	u8 sleep_ctrl_mask;
59 };
60 
61 struct as3722_regulator_config_data {
62 	struct regulator_init_data *reg_init;
63 	bool enable_tracking;
64 	int ext_control;
65 };
66 
67 struct as3722_regulators {
68 	struct device *dev;
69 	struct as3722 *as3722;
70 	struct regulator_desc desc[AS3722_REGULATOR_ID_MAX];
71 	struct as3722_regulator_config_data
72 			reg_config_data[AS3722_REGULATOR_ID_MAX];
73 };
74 
75 static const struct as3722_register_mapping as3722_reg_lookup[] = {
76 	{
77 		.regulator_id = AS3722_REGULATOR_ID_SD0,
78 		.name = "as3722-sd0",
79 		.vsel_reg = AS3722_SD0_VOLTAGE_REG,
80 		.vsel_mask = AS3722_SD_VSEL_MASK,
81 		.enable_reg = AS3722_SD_CONTROL_REG,
82 		.enable_mask = AS3722_SDn_CTRL(0),
83 		.sleep_ctrl_reg = AS3722_ENABLE_CTRL1_REG,
84 		.sleep_ctrl_mask = AS3722_SD0_EXT_ENABLE_MASK,
85 		.control_reg = AS3722_SD0_CONTROL_REG,
86 		.mode_mask = AS3722_SD0_MODE_FAST,
87 	},
88 	{
89 		.regulator_id = AS3722_REGULATOR_ID_SD1,
90 		.name = "as3722-sd1",
91 		.vsel_reg = AS3722_SD1_VOLTAGE_REG,
92 		.vsel_mask = AS3722_SD_VSEL_MASK,
93 		.enable_reg = AS3722_SD_CONTROL_REG,
94 		.enable_mask = AS3722_SDn_CTRL(1),
95 		.sleep_ctrl_reg = AS3722_ENABLE_CTRL1_REG,
96 		.sleep_ctrl_mask = AS3722_SD1_EXT_ENABLE_MASK,
97 		.control_reg = AS3722_SD1_CONTROL_REG,
98 		.mode_mask = AS3722_SD1_MODE_FAST,
99 	},
100 	{
101 		.regulator_id = AS3722_REGULATOR_ID_SD2,
102 		.name = "as3722-sd2",
103 		.sname = "vsup-sd2",
104 		.vsel_reg = AS3722_SD2_VOLTAGE_REG,
105 		.vsel_mask = AS3722_SD_VSEL_MASK,
106 		.enable_reg = AS3722_SD_CONTROL_REG,
107 		.enable_mask = AS3722_SDn_CTRL(2),
108 		.sleep_ctrl_reg = AS3722_ENABLE_CTRL1_REG,
109 		.sleep_ctrl_mask = AS3722_SD2_EXT_ENABLE_MASK,
110 		.control_reg = AS3722_SD23_CONTROL_REG,
111 		.mode_mask = AS3722_SD2_MODE_FAST,
112 		.n_voltages = AS3722_SD2_VSEL_MAX + 1,
113 	},
114 	{
115 		.regulator_id = AS3722_REGULATOR_ID_SD3,
116 		.name = "as3722-sd3",
117 		.sname = "vsup-sd3",
118 		.vsel_reg = AS3722_SD3_VOLTAGE_REG,
119 		.vsel_mask = AS3722_SD_VSEL_MASK,
120 		.enable_reg = AS3722_SD_CONTROL_REG,
121 		.enable_mask = AS3722_SDn_CTRL(3),
122 		.sleep_ctrl_reg = AS3722_ENABLE_CTRL1_REG,
123 		.sleep_ctrl_mask = AS3722_SD3_EXT_ENABLE_MASK,
124 		.control_reg = AS3722_SD23_CONTROL_REG,
125 		.mode_mask = AS3722_SD3_MODE_FAST,
126 		.n_voltages = AS3722_SD2_VSEL_MAX + 1,
127 	},
128 	{
129 		.regulator_id = AS3722_REGULATOR_ID_SD4,
130 		.name = "as3722-sd4",
131 		.sname = "vsup-sd4",
132 		.vsel_reg = AS3722_SD4_VOLTAGE_REG,
133 		.vsel_mask = AS3722_SD_VSEL_MASK,
134 		.enable_reg = AS3722_SD_CONTROL_REG,
135 		.enable_mask = AS3722_SDn_CTRL(4),
136 		.sleep_ctrl_reg = AS3722_ENABLE_CTRL2_REG,
137 		.sleep_ctrl_mask = AS3722_SD4_EXT_ENABLE_MASK,
138 		.control_reg = AS3722_SD4_CONTROL_REG,
139 		.mode_mask = AS3722_SD4_MODE_FAST,
140 		.n_voltages = AS3722_SD2_VSEL_MAX + 1,
141 	},
142 	{
143 		.regulator_id = AS3722_REGULATOR_ID_SD5,
144 		.name = "as3722-sd5",
145 		.sname = "vsup-sd5",
146 		.vsel_reg = AS3722_SD5_VOLTAGE_REG,
147 		.vsel_mask = AS3722_SD_VSEL_MASK,
148 		.enable_reg = AS3722_SD_CONTROL_REG,
149 		.enable_mask = AS3722_SDn_CTRL(5),
150 		.sleep_ctrl_reg = AS3722_ENABLE_CTRL2_REG,
151 		.sleep_ctrl_mask = AS3722_SD5_EXT_ENABLE_MASK,
152 		.control_reg = AS3722_SD5_CONTROL_REG,
153 		.mode_mask = AS3722_SD5_MODE_FAST,
154 		.n_voltages = AS3722_SD2_VSEL_MAX + 1,
155 	},
156 	{
157 		.regulator_id = AS3722_REGULATOR_ID_SD6,
158 		.name = "as3722-sd6",
159 		.vsel_reg = AS3722_SD6_VOLTAGE_REG,
160 		.vsel_mask = AS3722_SD_VSEL_MASK,
161 		.enable_reg = AS3722_SD_CONTROL_REG,
162 		.enable_mask = AS3722_SDn_CTRL(6),
163 		.sleep_ctrl_reg = AS3722_ENABLE_CTRL2_REG,
164 		.sleep_ctrl_mask = AS3722_SD6_EXT_ENABLE_MASK,
165 		.control_reg = AS3722_SD6_CONTROL_REG,
166 		.mode_mask = AS3722_SD6_MODE_FAST,
167 	},
168 	{
169 		.regulator_id = AS3722_REGULATOR_ID_LDO0,
170 		.name = "as3722-ldo0",
171 		.sname = "vin-ldo0",
172 		.vsel_reg = AS3722_LDO0_VOLTAGE_REG,
173 		.vsel_mask = AS3722_LDO0_VSEL_MASK,
174 		.enable_reg = AS3722_LDOCONTROL0_REG,
175 		.enable_mask = AS3722_LDO0_CTRL,
176 		.sleep_ctrl_reg = AS3722_ENABLE_CTRL3_REG,
177 		.sleep_ctrl_mask = AS3722_LDO0_EXT_ENABLE_MASK,
178 		.n_voltages = AS3722_LDO0_NUM_VOLT,
179 	},
180 	{
181 		.regulator_id = AS3722_REGULATOR_ID_LDO1,
182 		.name = "as3722-ldo1",
183 		.sname = "vin-ldo1-6",
184 		.vsel_reg = AS3722_LDO1_VOLTAGE_REG,
185 		.vsel_mask = AS3722_LDO_VSEL_MASK,
186 		.enable_reg = AS3722_LDOCONTROL0_REG,
187 		.enable_mask = AS3722_LDO1_CTRL,
188 		.sleep_ctrl_reg = AS3722_ENABLE_CTRL3_REG,
189 		.sleep_ctrl_mask = AS3722_LDO1_EXT_ENABLE_MASK,
190 		.n_voltages = AS3722_LDO_NUM_VOLT,
191 	},
192 	{
193 		.regulator_id = AS3722_REGULATOR_ID_LDO2,
194 		.name = "as3722-ldo2",
195 		.sname = "vin-ldo2-5-7",
196 		.vsel_reg = AS3722_LDO2_VOLTAGE_REG,
197 		.vsel_mask = AS3722_LDO_VSEL_MASK,
198 		.enable_reg = AS3722_LDOCONTROL0_REG,
199 		.enable_mask = AS3722_LDO2_CTRL,
200 		.sleep_ctrl_reg = AS3722_ENABLE_CTRL3_REG,
201 		.sleep_ctrl_mask = AS3722_LDO2_EXT_ENABLE_MASK,
202 		.n_voltages = AS3722_LDO_NUM_VOLT,
203 	},
204 	{
205 		.regulator_id = AS3722_REGULATOR_ID_LDO3,
206 		.name = "as3722-ldo3",
207 		.sname = "vin-ldo3-4",
208 		.vsel_reg = AS3722_LDO3_VOLTAGE_REG,
209 		.vsel_mask = AS3722_LDO3_VSEL_MASK,
210 		.enable_reg = AS3722_LDOCONTROL0_REG,
211 		.enable_mask = AS3722_LDO3_CTRL,
212 		.sleep_ctrl_reg = AS3722_ENABLE_CTRL3_REG,
213 		.sleep_ctrl_mask = AS3722_LDO3_EXT_ENABLE_MASK,
214 		.n_voltages = AS3722_LDO3_NUM_VOLT,
215 	},
216 	{
217 		.regulator_id = AS3722_REGULATOR_ID_LDO4,
218 		.name = "as3722-ldo4",
219 		.sname = "vin-ldo3-4",
220 		.vsel_reg = AS3722_LDO4_VOLTAGE_REG,
221 		.vsel_mask = AS3722_LDO_VSEL_MASK,
222 		.enable_reg = AS3722_LDOCONTROL0_REG,
223 		.enable_mask = AS3722_LDO4_CTRL,
224 		.sleep_ctrl_reg = AS3722_ENABLE_CTRL4_REG,
225 		.sleep_ctrl_mask = AS3722_LDO4_EXT_ENABLE_MASK,
226 		.n_voltages = AS3722_LDO_NUM_VOLT,
227 	},
228 	{
229 		.regulator_id = AS3722_REGULATOR_ID_LDO5,
230 		.name = "as3722-ldo5",
231 		.sname = "vin-ldo2-5-7",
232 		.vsel_reg = AS3722_LDO5_VOLTAGE_REG,
233 		.vsel_mask = AS3722_LDO_VSEL_MASK,
234 		.enable_reg = AS3722_LDOCONTROL0_REG,
235 		.enable_mask = AS3722_LDO5_CTRL,
236 		.sleep_ctrl_reg = AS3722_ENABLE_CTRL4_REG,
237 		.sleep_ctrl_mask = AS3722_LDO5_EXT_ENABLE_MASK,
238 		.n_voltages = AS3722_LDO_NUM_VOLT,
239 	},
240 	{
241 		.regulator_id = AS3722_REGULATOR_ID_LDO6,
242 		.name = "as3722-ldo6",
243 		.sname = "vin-ldo1-6",
244 		.vsel_reg = AS3722_LDO6_VOLTAGE_REG,
245 		.vsel_mask = AS3722_LDO_VSEL_MASK,
246 		.enable_reg = AS3722_LDOCONTROL0_REG,
247 		.enable_mask = AS3722_LDO6_CTRL,
248 		.sleep_ctrl_reg = AS3722_ENABLE_CTRL4_REG,
249 		.sleep_ctrl_mask = AS3722_LDO6_EXT_ENABLE_MASK,
250 		.n_voltages = AS3722_LDO_NUM_VOLT,
251 	},
252 	{
253 		.regulator_id = AS3722_REGULATOR_ID_LDO7,
254 		.name = "as3722-ldo7",
255 		.sname = "vin-ldo2-5-7",
256 		.vsel_reg = AS3722_LDO7_VOLTAGE_REG,
257 		.vsel_mask = AS3722_LDO_VSEL_MASK,
258 		.enable_reg = AS3722_LDOCONTROL0_REG,
259 		.enable_mask = AS3722_LDO7_CTRL,
260 		.sleep_ctrl_reg = AS3722_ENABLE_CTRL4_REG,
261 		.sleep_ctrl_mask = AS3722_LDO7_EXT_ENABLE_MASK,
262 		.n_voltages = AS3722_LDO_NUM_VOLT,
263 	},
264 	{
265 		.regulator_id = AS3722_REGULATOR_ID_LDO9,
266 		.name = "as3722-ldo9",
267 		.sname = "vin-ldo9-10",
268 		.vsel_reg = AS3722_LDO9_VOLTAGE_REG,
269 		.vsel_mask = AS3722_LDO_VSEL_MASK,
270 		.enable_reg = AS3722_LDOCONTROL1_REG,
271 		.enable_mask = AS3722_LDO9_CTRL,
272 		.sleep_ctrl_reg = AS3722_ENABLE_CTRL5_REG,
273 		.sleep_ctrl_mask = AS3722_LDO9_EXT_ENABLE_MASK,
274 		.n_voltages = AS3722_LDO_NUM_VOLT,
275 	},
276 	{
277 		.regulator_id = AS3722_REGULATOR_ID_LDO10,
278 		.name = "as3722-ldo10",
279 		.sname = "vin-ldo9-10",
280 		.vsel_reg = AS3722_LDO10_VOLTAGE_REG,
281 		.vsel_mask = AS3722_LDO_VSEL_MASK,
282 		.enable_reg = AS3722_LDOCONTROL1_REG,
283 		.enable_mask = AS3722_LDO10_CTRL,
284 		.sleep_ctrl_reg = AS3722_ENABLE_CTRL5_REG,
285 		.sleep_ctrl_mask = AS3722_LDO10_EXT_ENABLE_MASK,
286 		.n_voltages = AS3722_LDO_NUM_VOLT,
287 	},
288 	{
289 		.regulator_id = AS3722_REGULATOR_ID_LDO11,
290 		.name = "as3722-ldo11",
291 		.sname = "vin-ldo11",
292 		.vsel_reg = AS3722_LDO11_VOLTAGE_REG,
293 		.vsel_mask = AS3722_LDO_VSEL_MASK,
294 		.enable_reg = AS3722_LDOCONTROL1_REG,
295 		.enable_mask = AS3722_LDO11_CTRL,
296 		.sleep_ctrl_reg = AS3722_ENABLE_CTRL5_REG,
297 		.sleep_ctrl_mask = AS3722_LDO11_EXT_ENABLE_MASK,
298 		.n_voltages = AS3722_LDO_NUM_VOLT,
299 	},
300 };
301 
302 static const unsigned int as3722_ldo_current[] = { 150000, 300000 };
303 static const unsigned int as3722_sd016_current[] = {
304 	2500000, 3000000, 3500000
305 };
306 
307 static const struct regulator_ops as3722_ldo0_ops = {
308 	.is_enabled = regulator_is_enabled_regmap,
309 	.enable = regulator_enable_regmap,
310 	.disable = regulator_disable_regmap,
311 	.list_voltage = regulator_list_voltage_linear,
312 	.get_voltage_sel = regulator_get_voltage_sel_regmap,
313 	.set_voltage_sel = regulator_set_voltage_sel_regmap,
314 	.get_current_limit = regulator_get_current_limit_regmap,
315 	.set_current_limit = regulator_set_current_limit_regmap,
316 };
317 
318 static const struct regulator_ops as3722_ldo0_extcntrl_ops = {
319 	.list_voltage = regulator_list_voltage_linear,
320 	.get_voltage_sel = regulator_get_voltage_sel_regmap,
321 	.set_voltage_sel = regulator_set_voltage_sel_regmap,
322 	.get_current_limit = regulator_get_current_limit_regmap,
323 	.set_current_limit = regulator_set_current_limit_regmap,
324 };
325 
326 static int as3722_ldo3_set_tracking_mode(struct as3722_regulators *as3722_reg,
327 		int id, u8 mode)
328 {
329 	struct as3722 *as3722 = as3722_reg->as3722;
330 
331 	switch (mode) {
332 	case AS3722_LDO3_MODE_PMOS:
333 	case AS3722_LDO3_MODE_PMOS_TRACKING:
334 	case AS3722_LDO3_MODE_NMOS:
335 	case AS3722_LDO3_MODE_SWITCH:
336 		return as3722_update_bits(as3722,
337 			as3722_reg_lookup[id].vsel_reg,
338 			AS3722_LDO3_MODE_MASK, mode);
339 
340 	default:
341 		return -EINVAL;
342 	}
343 }
344 
345 static int as3722_ldo3_get_current_limit(struct regulator_dev *rdev)
346 {
347 	return 150000;
348 }
349 
350 static const struct regulator_ops as3722_ldo3_ops = {
351 	.is_enabled = regulator_is_enabled_regmap,
352 	.enable = regulator_enable_regmap,
353 	.disable = regulator_disable_regmap,
354 	.list_voltage = regulator_list_voltage_linear,
355 	.get_voltage_sel = regulator_get_voltage_sel_regmap,
356 	.set_voltage_sel = regulator_set_voltage_sel_regmap,
357 	.get_current_limit = as3722_ldo3_get_current_limit,
358 };
359 
360 static const struct regulator_ops as3722_ldo3_extcntrl_ops = {
361 	.list_voltage = regulator_list_voltage_linear,
362 	.get_voltage_sel = regulator_get_voltage_sel_regmap,
363 	.set_voltage_sel = regulator_set_voltage_sel_regmap,
364 	.get_current_limit = as3722_ldo3_get_current_limit,
365 };
366 
367 static const struct regulator_ops as3722_ldo6_ops = {
368 	.is_enabled = regulator_is_enabled_regmap,
369 	.enable = regulator_enable_regmap,
370 	.disable = regulator_disable_regmap,
371 	.map_voltage = regulator_map_voltage_linear_range,
372 	.set_voltage_sel = regulator_set_voltage_sel_regmap,
373 	.get_voltage_sel = regulator_get_voltage_sel_regmap,
374 	.list_voltage = regulator_list_voltage_linear_range,
375 	.get_current_limit = regulator_get_current_limit_regmap,
376 	.set_current_limit = regulator_set_current_limit_regmap,
377 	.get_bypass = regulator_get_bypass_regmap,
378 	.set_bypass = regulator_set_bypass_regmap,
379 };
380 
381 static const struct regulator_ops as3722_ldo6_extcntrl_ops = {
382 	.map_voltage = regulator_map_voltage_linear_range,
383 	.set_voltage_sel = regulator_set_voltage_sel_regmap,
384 	.get_voltage_sel = regulator_get_voltage_sel_regmap,
385 	.list_voltage = regulator_list_voltage_linear_range,
386 	.get_current_limit = regulator_get_current_limit_regmap,
387 	.set_current_limit = regulator_set_current_limit_regmap,
388 	.get_bypass = regulator_get_bypass_regmap,
389 	.set_bypass = regulator_set_bypass_regmap,
390 };
391 
392 static const struct linear_range as3722_ldo_ranges[] = {
393 	REGULATOR_LINEAR_RANGE(0, 0x00, 0x00, 0),
394 	REGULATOR_LINEAR_RANGE(825000, 0x01, 0x24, 25000),
395 	REGULATOR_LINEAR_RANGE(1725000, 0x40, 0x7F, 25000),
396 };
397 
398 static const struct regulator_ops as3722_ldo_ops = {
399 	.is_enabled = regulator_is_enabled_regmap,
400 	.enable = regulator_enable_regmap,
401 	.disable = regulator_disable_regmap,
402 	.map_voltage = regulator_map_voltage_linear_range,
403 	.set_voltage_sel = regulator_set_voltage_sel_regmap,
404 	.get_voltage_sel = regulator_get_voltage_sel_regmap,
405 	.list_voltage = regulator_list_voltage_linear_range,
406 	.get_current_limit = regulator_get_current_limit_regmap,
407 	.set_current_limit = regulator_set_current_limit_regmap,
408 };
409 
410 static const struct regulator_ops as3722_ldo_extcntrl_ops = {
411 	.map_voltage = regulator_map_voltage_linear_range,
412 	.set_voltage_sel = regulator_set_voltage_sel_regmap,
413 	.get_voltage_sel = regulator_get_voltage_sel_regmap,
414 	.list_voltage = regulator_list_voltage_linear_range,
415 	.get_current_limit = regulator_get_current_limit_regmap,
416 	.set_current_limit = regulator_set_current_limit_regmap,
417 };
418 
419 static unsigned int as3722_sd_get_mode(struct regulator_dev *rdev)
420 {
421 	struct as3722_regulators *as3722_regs = rdev_get_drvdata(rdev);
422 	struct as3722 *as3722 = as3722_regs->as3722;
423 	int id = rdev_get_id(rdev);
424 	u32 val;
425 	int ret;
426 
427 	if (!as3722_reg_lookup[id].control_reg)
428 		return -ENOTSUPP;
429 
430 	ret = as3722_read(as3722, as3722_reg_lookup[id].control_reg, &val);
431 	if (ret < 0) {
432 		dev_err(as3722_regs->dev, "Reg 0x%02x read failed: %d\n",
433 			as3722_reg_lookup[id].control_reg, ret);
434 		return ret;
435 	}
436 
437 	if (val & as3722_reg_lookup[id].mode_mask)
438 		return REGULATOR_MODE_FAST;
439 	else
440 		return REGULATOR_MODE_NORMAL;
441 }
442 
443 static int as3722_sd_set_mode(struct regulator_dev *rdev,
444 		unsigned int mode)
445 {
446 	struct as3722_regulators *as3722_regs = rdev_get_drvdata(rdev);
447 	struct as3722 *as3722 = as3722_regs->as3722;
448 	u8 id = rdev_get_id(rdev);
449 	u8 val = 0;
450 	int ret;
451 
452 	if (!as3722_reg_lookup[id].control_reg)
453 		return -ERANGE;
454 
455 	switch (mode) {
456 	case REGULATOR_MODE_FAST:
457 		val = as3722_reg_lookup[id].mode_mask;
458 		fallthrough;
459 	case REGULATOR_MODE_NORMAL:
460 		break;
461 	default:
462 		return -EINVAL;
463 	}
464 
465 	ret = as3722_update_bits(as3722, as3722_reg_lookup[id].control_reg,
466 			as3722_reg_lookup[id].mode_mask, val);
467 	if (ret < 0) {
468 		dev_err(as3722_regs->dev, "Reg 0x%02x update failed: %d\n",
469 			as3722_reg_lookup[id].control_reg, ret);
470 		return ret;
471 	}
472 	return ret;
473 }
474 
475 static bool as3722_sd0_is_low_voltage(struct as3722_regulators *as3722_regs)
476 {
477 	int err;
478 	unsigned val;
479 
480 	err = as3722_read(as3722_regs->as3722, AS3722_FUSE7_REG, &val);
481 	if (err < 0) {
482 		dev_err(as3722_regs->dev, "Reg 0x%02x read failed: %d\n",
483 			AS3722_FUSE7_REG, err);
484 		return false;
485 	}
486 	if (val & AS3722_FUSE7_SD0_LOW_VOLTAGE)
487 		return true;
488 	return false;
489 }
490 
491 static const struct linear_range as3722_sd2345_ranges[] = {
492 	REGULATOR_LINEAR_RANGE(0, 0x00, 0x00, 0),
493 	REGULATOR_LINEAR_RANGE(612500, 0x01, 0x40, 12500),
494 	REGULATOR_LINEAR_RANGE(1425000, 0x41, 0x70, 25000),
495 	REGULATOR_LINEAR_RANGE(2650000, 0x71, 0x7F, 50000),
496 };
497 
498 static const struct regulator_ops as3722_sd016_ops = {
499 	.is_enabled = regulator_is_enabled_regmap,
500 	.enable = regulator_enable_regmap,
501 	.disable = regulator_disable_regmap,
502 	.list_voltage = regulator_list_voltage_linear,
503 	.map_voltage = regulator_map_voltage_linear,
504 	.get_voltage_sel = regulator_get_voltage_sel_regmap,
505 	.set_voltage_sel = regulator_set_voltage_sel_regmap,
506 	.get_current_limit = regulator_get_current_limit_regmap,
507 	.set_current_limit = regulator_set_current_limit_regmap,
508 	.get_mode = as3722_sd_get_mode,
509 	.set_mode = as3722_sd_set_mode,
510 };
511 
512 static const struct regulator_ops as3722_sd016_extcntrl_ops = {
513 	.list_voltage = regulator_list_voltage_linear,
514 	.map_voltage = regulator_map_voltage_linear,
515 	.get_voltage_sel = regulator_get_voltage_sel_regmap,
516 	.set_voltage_sel = regulator_set_voltage_sel_regmap,
517 	.get_current_limit = regulator_get_current_limit_regmap,
518 	.set_current_limit = regulator_set_current_limit_regmap,
519 	.get_mode = as3722_sd_get_mode,
520 	.set_mode = as3722_sd_set_mode,
521 };
522 
523 static const struct regulator_ops as3722_sd2345_ops = {
524 	.is_enabled = regulator_is_enabled_regmap,
525 	.enable = regulator_enable_regmap,
526 	.disable = regulator_disable_regmap,
527 	.list_voltage = regulator_list_voltage_linear_range,
528 	.map_voltage = regulator_map_voltage_linear_range,
529 	.set_voltage_sel = regulator_set_voltage_sel_regmap,
530 	.get_voltage_sel = regulator_get_voltage_sel_regmap,
531 	.get_mode = as3722_sd_get_mode,
532 	.set_mode = as3722_sd_set_mode,
533 };
534 
535 static const struct regulator_ops as3722_sd2345_extcntrl_ops = {
536 	.list_voltage = regulator_list_voltage_linear_range,
537 	.map_voltage = regulator_map_voltage_linear_range,
538 	.set_voltage_sel = regulator_set_voltage_sel_regmap,
539 	.get_voltage_sel = regulator_get_voltage_sel_regmap,
540 	.get_mode = as3722_sd_get_mode,
541 	.set_mode = as3722_sd_set_mode,
542 };
543 
544 static int as3722_extreg_init(struct as3722_regulators *as3722_regs, int id,
545 		int ext_pwr_ctrl)
546 {
547 	int ret;
548 	unsigned int val;
549 
550 	if ((ext_pwr_ctrl < AS3722_EXT_CONTROL_ENABLE1) ||
551 		(ext_pwr_ctrl > AS3722_EXT_CONTROL_ENABLE3))
552 		return -EINVAL;
553 
554 	val =  ext_pwr_ctrl << (ffs(as3722_reg_lookup[id].sleep_ctrl_mask) - 1);
555 	ret = as3722_update_bits(as3722_regs->as3722,
556 			as3722_reg_lookup[id].sleep_ctrl_reg,
557 			as3722_reg_lookup[id].sleep_ctrl_mask, val);
558 	if (ret < 0)
559 		dev_err(as3722_regs->dev, "Reg 0x%02x update failed: %d\n",
560 			as3722_reg_lookup[id].sleep_ctrl_reg, ret);
561 	return ret;
562 }
563 
564 static struct of_regulator_match as3722_regulator_matches[] = {
565 	{ .name = "sd0", },
566 	{ .name = "sd1", },
567 	{ .name = "sd2", },
568 	{ .name = "sd3", },
569 	{ .name = "sd4", },
570 	{ .name = "sd5", },
571 	{ .name = "sd6", },
572 	{ .name = "ldo0", },
573 	{ .name = "ldo1", },
574 	{ .name = "ldo2", },
575 	{ .name = "ldo3", },
576 	{ .name = "ldo4", },
577 	{ .name = "ldo5", },
578 	{ .name = "ldo6", },
579 	{ .name = "ldo7", },
580 	{ .name = "ldo9", },
581 	{ .name = "ldo10", },
582 	{ .name = "ldo11", },
583 };
584 
585 static int as3722_get_regulator_dt_data(struct platform_device *pdev,
586 		struct as3722_regulators *as3722_regs)
587 {
588 	struct device_node *np;
589 	struct as3722_regulator_config_data *reg_config;
590 	u32 prop;
591 	int id;
592 	int ret;
593 
594 	np = of_get_child_by_name(pdev->dev.parent->of_node, "regulators");
595 	if (!np) {
596 		dev_err(&pdev->dev, "Device is not having regulators node\n");
597 		return -ENODEV;
598 	}
599 	pdev->dev.of_node = np;
600 
601 	ret = of_regulator_match(&pdev->dev, np, as3722_regulator_matches,
602 			ARRAY_SIZE(as3722_regulator_matches));
603 	of_node_put(np);
604 	if (ret < 0) {
605 		dev_err(&pdev->dev, "Parsing of regulator node failed: %d\n",
606 			ret);
607 		return ret;
608 	}
609 
610 	for (id = 0; id < ARRAY_SIZE(as3722_regulator_matches); ++id) {
611 		struct device_node *reg_node;
612 
613 		reg_config = &as3722_regs->reg_config_data[id];
614 		reg_config->reg_init = as3722_regulator_matches[id].init_data;
615 		reg_node = as3722_regulator_matches[id].of_node;
616 
617 		if (!reg_config->reg_init || !reg_node)
618 			continue;
619 
620 		ret = of_property_read_u32(reg_node, "ams,ext-control", &prop);
621 		if (!ret) {
622 			if (prop < 3)
623 				reg_config->ext_control = prop;
624 			else
625 				dev_warn(&pdev->dev,
626 					"ext-control have invalid option: %u\n",
627 					prop);
628 		}
629 		reg_config->enable_tracking =
630 			of_property_read_bool(reg_node, "ams,enable-tracking");
631 	}
632 	return 0;
633 }
634 
635 static int as3722_regulator_probe(struct platform_device *pdev)
636 {
637 	struct as3722 *as3722 = dev_get_drvdata(pdev->dev.parent);
638 	struct as3722_regulators *as3722_regs;
639 	struct as3722_regulator_config_data *reg_config;
640 	struct regulator_dev *rdev;
641 	struct regulator_config config = { };
642 	const struct regulator_ops *ops;
643 	int id;
644 	int ret;
645 
646 	as3722_regs = devm_kzalloc(&pdev->dev, sizeof(*as3722_regs),
647 				GFP_KERNEL);
648 	if (!as3722_regs)
649 		return -ENOMEM;
650 
651 	as3722_regs->dev = &pdev->dev;
652 	as3722_regs->as3722 = as3722;
653 	platform_set_drvdata(pdev, as3722_regs);
654 
655 	ret = as3722_get_regulator_dt_data(pdev, as3722_regs);
656 	if (ret < 0)
657 		return ret;
658 
659 	config.dev = &pdev->dev;
660 	config.driver_data = as3722_regs;
661 	config.regmap = as3722->regmap;
662 
663 	for (id = 0; id < AS3722_REGULATOR_ID_MAX; id++) {
664 		struct regulator_desc *desc;
665 
666 		desc = &as3722_regs->desc[id];
667 		reg_config = &as3722_regs->reg_config_data[id];
668 
669 		desc->name = as3722_reg_lookup[id].name;
670 		desc->supply_name = as3722_reg_lookup[id].sname;
671 		desc->id = as3722_reg_lookup[id].regulator_id;
672 		desc->n_voltages = as3722_reg_lookup[id].n_voltages;
673 		desc->type = REGULATOR_VOLTAGE;
674 		desc->owner = THIS_MODULE;
675 		desc->enable_reg = as3722_reg_lookup[id].enable_reg;
676 		desc->enable_mask = as3722_reg_lookup[id].enable_mask;
677 		desc->vsel_reg = as3722_reg_lookup[id].vsel_reg;
678 		desc->vsel_mask = as3722_reg_lookup[id].vsel_mask;
679 		switch (id) {
680 		case AS3722_REGULATOR_ID_LDO0:
681 			if (reg_config->ext_control)
682 				ops = &as3722_ldo0_extcntrl_ops;
683 			else
684 				ops = &as3722_ldo0_ops;
685 			desc->min_uV = 825000;
686 			desc->uV_step = 25000;
687 			desc->linear_min_sel = 1;
688 			desc->enable_time = 500;
689 			desc->curr_table = as3722_ldo_current;
690 			desc->n_current_limits = ARRAY_SIZE(as3722_ldo_current);
691 			desc->csel_reg = as3722_reg_lookup[id].vsel_reg;
692 			desc->csel_mask = AS3722_LDO_ILIMIT_MASK;
693 			break;
694 		case AS3722_REGULATOR_ID_LDO3:
695 			if (reg_config->ext_control)
696 				ops = &as3722_ldo3_extcntrl_ops;
697 			else
698 				ops = &as3722_ldo3_ops;
699 			desc->min_uV = 620000;
700 			desc->uV_step = 20000;
701 			desc->linear_min_sel = 1;
702 			desc->enable_time = 500;
703 			if (reg_config->enable_tracking) {
704 				ret = as3722_ldo3_set_tracking_mode(as3722_regs,
705 					id, AS3722_LDO3_MODE_PMOS_TRACKING);
706 				if (ret < 0) {
707 					dev_err(&pdev->dev,
708 						"LDO3 tracking failed: %d\n",
709 						ret);
710 					return ret;
711 				}
712 			}
713 			break;
714 		case AS3722_REGULATOR_ID_LDO6:
715 			if (reg_config->ext_control)
716 				ops = &as3722_ldo6_extcntrl_ops;
717 			else
718 				ops = &as3722_ldo6_ops;
719 			desc->enable_time = 500;
720 			desc->bypass_reg = AS3722_LDO6_VOLTAGE_REG;
721 			desc->bypass_mask = AS3722_LDO_VSEL_MASK;
722 			desc->bypass_val_on = AS3722_LDO6_VSEL_BYPASS;
723 			desc->bypass_val_off = AS3722_LDO6_VSEL_BYPASS;
724 			desc->linear_ranges = as3722_ldo_ranges;
725 			desc->n_linear_ranges = ARRAY_SIZE(as3722_ldo_ranges);
726 			desc->curr_table = as3722_ldo_current;
727 			desc->n_current_limits = ARRAY_SIZE(as3722_ldo_current);
728 			desc->csel_reg = as3722_reg_lookup[id].vsel_reg;
729 			desc->csel_mask = AS3722_LDO_ILIMIT_MASK;
730 			break;
731 		case AS3722_REGULATOR_ID_SD0:
732 		case AS3722_REGULATOR_ID_SD1:
733 		case AS3722_REGULATOR_ID_SD6:
734 			if (reg_config->ext_control)
735 				ops = &as3722_sd016_extcntrl_ops;
736 			else
737 				ops = &as3722_sd016_ops;
738 			if (id == AS3722_REGULATOR_ID_SD0 &&
739 			    as3722_sd0_is_low_voltage(as3722_regs)) {
740 				as3722_regs->desc[id].n_voltages =
741 					AS3722_SD0_VSEL_LOW_VOL_MAX + 1;
742 				as3722_regs->desc[id].min_uV = 410000;
743 			} else {
744 				as3722_regs->desc[id].n_voltages =
745 					AS3722_SD0_VSEL_MAX + 1;
746 				as3722_regs->desc[id].min_uV = 610000;
747 			}
748 			desc->uV_step = 10000;
749 			desc->linear_min_sel = 1;
750 			desc->enable_time = 600;
751 			desc->curr_table = as3722_sd016_current;
752 			desc->n_current_limits =
753 				ARRAY_SIZE(as3722_sd016_current);
754 			if (id == AS3722_REGULATOR_ID_SD0) {
755 				desc->csel_reg = AS3722_OVCURRENT_REG;
756 				desc->csel_mask =
757 					AS3722_OVCURRENT_SD0_TRIP_MASK;
758 			} else if (id == AS3722_REGULATOR_ID_SD1) {
759 				desc->csel_reg = AS3722_OVCURRENT_REG;
760 				desc->csel_mask =
761 					AS3722_OVCURRENT_SD1_TRIP_MASK;
762 			} else if (id == AS3722_REGULATOR_ID_SD6) {
763 				desc->csel_reg = AS3722_OVCURRENT_DEB_REG;
764 				desc->csel_mask =
765 					AS3722_OVCURRENT_SD6_TRIP_MASK;
766 			}
767 			break;
768 		case AS3722_REGULATOR_ID_SD2:
769 		case AS3722_REGULATOR_ID_SD3:
770 		case AS3722_REGULATOR_ID_SD4:
771 		case AS3722_REGULATOR_ID_SD5:
772 			if (reg_config->ext_control)
773 				ops = &as3722_sd2345_extcntrl_ops;
774 			else
775 				ops = &as3722_sd2345_ops;
776 			desc->linear_ranges = as3722_sd2345_ranges;
777 			desc->n_linear_ranges =
778 					ARRAY_SIZE(as3722_sd2345_ranges);
779 			break;
780 		default:
781 			if (reg_config->ext_control)
782 				ops = &as3722_ldo_extcntrl_ops;
783 			else
784 				ops = &as3722_ldo_ops;
785 			desc->enable_time = 500;
786 			desc->linear_ranges = as3722_ldo_ranges;
787 			desc->n_linear_ranges = ARRAY_SIZE(as3722_ldo_ranges);
788 			desc->curr_table = as3722_ldo_current;
789 			desc->n_current_limits = ARRAY_SIZE(as3722_ldo_current);
790 			desc->csel_reg = as3722_reg_lookup[id].vsel_reg;
791 			desc->csel_mask = AS3722_LDO_ILIMIT_MASK;
792 			break;
793 		}
794 		desc->ops = ops;
795 		config.init_data = reg_config->reg_init;
796 		config.of_node = as3722_regulator_matches[id].of_node;
797 		rdev = devm_regulator_register(&pdev->dev, desc, &config);
798 		if (IS_ERR(rdev)) {
799 			ret = PTR_ERR(rdev);
800 			dev_err(&pdev->dev, "regulator %d register failed %d\n",
801 				id, ret);
802 			return ret;
803 		}
804 
805 		if (reg_config->ext_control) {
806 			ret = regulator_enable_regmap(rdev);
807 			if (ret < 0) {
808 				dev_err(&pdev->dev,
809 					"Regulator %d enable failed: %d\n",
810 					id, ret);
811 				return ret;
812 			}
813 			ret = as3722_extreg_init(as3722_regs, id,
814 					reg_config->ext_control);
815 			if (ret < 0) {
816 				dev_err(&pdev->dev,
817 					"AS3722 ext control failed: %d", ret);
818 				return ret;
819 			}
820 		}
821 	}
822 	return 0;
823 }
824 
825 static const struct of_device_id of_as3722_regulator_match[] = {
826 	{ .compatible = "ams,as3722-regulator", },
827 	{},
828 };
829 MODULE_DEVICE_TABLE(of, of_as3722_regulator_match);
830 
831 static struct platform_driver as3722_regulator_driver = {
832 	.driver = {
833 		.name = "as3722-regulator",
834 		.of_match_table = of_as3722_regulator_match,
835 	},
836 	.probe = as3722_regulator_probe,
837 };
838 
839 module_platform_driver(as3722_regulator_driver);
840 
841 MODULE_ALIAS("platform:as3722-regulator");
842 MODULE_DESCRIPTION("AS3722 regulator driver");
843 MODULE_AUTHOR("Florian Lobmaier <florian.lobmaier@ams.com>");
844 MODULE_AUTHOR("Laxman Dewangan <ldewangan@nvidia.com>");
845 MODULE_LICENSE("GPL");
846