1 // SPDX-License-Identifier: GPL-2.0+
2 //
3 // Copyright (C) 2011-2013 Freescale Semiconductor, Inc. All Rights Reserved.
4 
5 #include <linux/kernel.h>
6 #include <linux/module.h>
7 #include <linux/init.h>
8 #include <linux/err.h>
9 #include <linux/of.h>
10 #include <linux/of_device.h>
11 #include <linux/regulator/of_regulator.h>
12 #include <linux/platform_device.h>
13 #include <linux/reboot.h>
14 #include <linux/regulator/driver.h>
15 #include <linux/regulator/machine.h>
16 #include <linux/regulator/pfuze100.h>
17 #include <linux/i2c.h>
18 #include <linux/slab.h>
19 #include <linux/regmap.h>
20 
21 #define PFUZE_FLAG_DISABLE_SW	BIT(1)
22 
23 #define PFUZE_NUMREGS		128
24 #define PFUZE100_VOL_OFFSET	0
25 #define PFUZE100_STANDBY_OFFSET	1
26 #define PFUZE100_MODE_OFFSET	3
27 #define PFUZE100_CONF_OFFSET	4
28 
29 #define PFUZE100_DEVICEID	0x0
30 #define PFUZE100_REVID		0x3
31 #define PFUZE100_FABID		0x4
32 
33 #define PFUZE100_COINVOL	0x1a
34 #define PFUZE100_SW1ABVOL	0x20
35 #define PFUZE100_SW1ABMODE	0x23
36 #define PFUZE100_SW1CVOL	0x2e
37 #define PFUZE100_SW1CMODE	0x31
38 #define PFUZE100_SW2VOL		0x35
39 #define PFUZE100_SW2MODE	0x38
40 #define PFUZE100_SW3AVOL	0x3c
41 #define PFUZE100_SW3AMODE	0x3f
42 #define PFUZE100_SW3BVOL	0x43
43 #define PFUZE100_SW3BMODE	0x46
44 #define PFUZE100_SW4VOL		0x4a
45 #define PFUZE100_SW4MODE	0x4d
46 #define PFUZE100_SWBSTCON1	0x66
47 #define PFUZE100_VREFDDRCON	0x6a
48 #define PFUZE100_VSNVSVOL	0x6b
49 #define PFUZE100_VGEN1VOL	0x6c
50 #define PFUZE100_VGEN2VOL	0x6d
51 #define PFUZE100_VGEN3VOL	0x6e
52 #define PFUZE100_VGEN4VOL	0x6f
53 #define PFUZE100_VGEN5VOL	0x70
54 #define PFUZE100_VGEN6VOL	0x71
55 
56 #define PFUZE100_SWxMODE_MASK	0xf
57 #define PFUZE100_SWxMODE_APS_APS	0x8
58 #define PFUZE100_SWxMODE_APS_OFF	0x4
59 
60 #define PFUZE100_VGENxLPWR	BIT(6)
61 #define PFUZE100_VGENxSTBY	BIT(5)
62 
63 enum chips { PFUZE100, PFUZE200, PFUZE3000 = 3, PFUZE3001 = 0x31, };
64 
65 struct pfuze_regulator {
66 	struct regulator_desc desc;
67 	unsigned char stby_reg;
68 	unsigned char stby_mask;
69 	bool sw_reg;
70 };
71 
72 struct pfuze_chip {
73 	int	chip_id;
74 	int     flags;
75 	struct regmap *regmap;
76 	struct device *dev;
77 	struct pfuze_regulator regulator_descs[PFUZE100_MAX_REGULATOR];
78 	struct regulator_dev *regulators[PFUZE100_MAX_REGULATOR];
79 	struct pfuze_regulator *pfuze_regulators;
80 };
81 
82 static const int pfuze100_swbst[] = {
83 	5000000, 5050000, 5100000, 5150000,
84 };
85 
86 static const int pfuze100_vsnvs[] = {
87 	1000000, 1100000, 1200000, 1300000, 1500000, 1800000, 3000000,
88 };
89 
90 static const int pfuze100_coin[] = {
91 	2500000, 2700000, 2800000, 2900000, 3000000, 3100000, 3200000, 3300000,
92 };
93 
94 static const int pfuze3000_sw1a[] = {
95 	700000, 725000, 750000, 775000, 800000, 825000, 850000, 875000,
96 	900000, 925000, 950000, 975000, 1000000, 1025000, 1050000, 1075000,
97 	1100000, 1125000, 1150000, 1175000, 1200000, 1225000, 1250000, 1275000,
98 	1300000, 1325000, 1350000, 1375000, 1400000, 1425000, 1800000, 3300000,
99 };
100 
101 static const int pfuze3000_sw2lo[] = {
102 	1500000, 1550000, 1600000, 1650000, 1700000, 1750000, 1800000, 1850000,
103 };
104 
105 static const int pfuze3000_sw2hi[] = {
106 	2500000, 2800000, 2850000, 3000000, 3100000, 3150000, 3200000, 3300000,
107 };
108 
109 static const struct of_device_id pfuze_dt_ids[] = {
110 	{ .compatible = "fsl,pfuze100", .data = (void *)PFUZE100},
111 	{ .compatible = "fsl,pfuze200", .data = (void *)PFUZE200},
112 	{ .compatible = "fsl,pfuze3000", .data = (void *)PFUZE3000},
113 	{ .compatible = "fsl,pfuze3001", .data = (void *)PFUZE3001},
114 	{ }
115 };
116 MODULE_DEVICE_TABLE(of, pfuze_dt_ids);
117 
118 static int pfuze100_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay)
119 {
120 	struct pfuze_chip *pfuze100 = rdev_get_drvdata(rdev);
121 	int id = rdev_get_id(rdev);
122 	bool reg_has_ramp_delay;
123 	unsigned int ramp_bits = 0;
124 	int ret;
125 
126 	switch (pfuze100->chip_id) {
127 	case PFUZE3001:
128 		/* no dynamic voltage scaling for PF3001 */
129 		reg_has_ramp_delay = false;
130 		break;
131 	case PFUZE3000:
132 		reg_has_ramp_delay = (id < PFUZE3000_SWBST);
133 		break;
134 	case PFUZE200:
135 		reg_has_ramp_delay = (id < PFUZE200_SWBST);
136 		break;
137 	case PFUZE100:
138 	default:
139 		reg_has_ramp_delay = (id < PFUZE100_SWBST);
140 		break;
141 	}
142 
143 	if (reg_has_ramp_delay) {
144 		if (ramp_delay > 0) {
145 			ramp_delay = 12500 / ramp_delay;
146 			ramp_bits = (ramp_delay >> 1) - (ramp_delay >> 3);
147 		}
148 
149 		ret = regmap_update_bits(pfuze100->regmap,
150 					 rdev->desc->vsel_reg + 4,
151 					 0xc0, ramp_bits << 6);
152 		if (ret < 0)
153 			dev_err(pfuze100->dev, "ramp failed, err %d\n", ret);
154 	} else {
155 		ret = -EACCES;
156 	}
157 
158 	return ret;
159 }
160 
161 static const struct regulator_ops pfuze100_ldo_regulator_ops = {
162 	.enable = regulator_enable_regmap,
163 	.disable = regulator_disable_regmap,
164 	.is_enabled = regulator_is_enabled_regmap,
165 	.list_voltage = regulator_list_voltage_linear,
166 	.set_voltage_sel = regulator_set_voltage_sel_regmap,
167 	.get_voltage_sel = regulator_get_voltage_sel_regmap,
168 };
169 
170 static const struct regulator_ops pfuze100_fixed_regulator_ops = {
171 	.enable = regulator_enable_regmap,
172 	.disable = regulator_disable_regmap,
173 	.is_enabled = regulator_is_enabled_regmap,
174 	.list_voltage = regulator_list_voltage_linear,
175 };
176 
177 static const struct regulator_ops pfuze100_sw_regulator_ops = {
178 	.list_voltage = regulator_list_voltage_linear,
179 	.set_voltage_sel = regulator_set_voltage_sel_regmap,
180 	.get_voltage_sel = regulator_get_voltage_sel_regmap,
181 	.set_voltage_time_sel = regulator_set_voltage_time_sel,
182 	.set_ramp_delay = pfuze100_set_ramp_delay,
183 };
184 
185 static const struct regulator_ops pfuze100_sw_disable_regulator_ops = {
186 	.enable = regulator_enable_regmap,
187 	.disable = regulator_disable_regmap,
188 	.is_enabled = regulator_is_enabled_regmap,
189 	.list_voltage = regulator_list_voltage_linear,
190 	.set_voltage_sel = regulator_set_voltage_sel_regmap,
191 	.get_voltage_sel = regulator_get_voltage_sel_regmap,
192 	.set_voltage_time_sel = regulator_set_voltage_time_sel,
193 	.set_ramp_delay = pfuze100_set_ramp_delay,
194 };
195 
196 static const struct regulator_ops pfuze100_swb_regulator_ops = {
197 	.enable = regulator_enable_regmap,
198 	.disable = regulator_disable_regmap,
199 	.is_enabled = regulator_is_enabled_regmap,
200 	.list_voltage = regulator_list_voltage_table,
201 	.map_voltage = regulator_map_voltage_ascend,
202 	.set_voltage_sel = regulator_set_voltage_sel_regmap,
203 	.get_voltage_sel = regulator_get_voltage_sel_regmap,
204 
205 };
206 
207 static const struct regulator_ops pfuze3000_sw_regulator_ops = {
208 	.enable = regulator_enable_regmap,
209 	.disable = regulator_disable_regmap,
210 	.is_enabled = regulator_is_enabled_regmap,
211 	.list_voltage = regulator_list_voltage_table,
212 	.map_voltage = regulator_map_voltage_ascend,
213 	.set_voltage_sel = regulator_set_voltage_sel_regmap,
214 	.get_voltage_sel = regulator_get_voltage_sel_regmap,
215 	.set_voltage_time_sel = regulator_set_voltage_time_sel,
216 	.set_ramp_delay = pfuze100_set_ramp_delay,
217 
218 };
219 
220 #define PFUZE100_FIXED_REG(_chip, _name, base, voltage)	\
221 	[_chip ## _ ## _name] = {	\
222 		.desc = {	\
223 			.name = #_name,	\
224 			.n_voltages = 1,	\
225 			.ops = &pfuze100_fixed_regulator_ops,	\
226 			.type = REGULATOR_VOLTAGE,	\
227 			.id = _chip ## _ ## _name,	\
228 			.owner = THIS_MODULE,	\
229 			.min_uV = (voltage),	\
230 			.enable_reg = (base),	\
231 			.enable_mask = 0x10,	\
232 		},	\
233 	}
234 
235 #define PFUZE100_SW_REG(_chip, _name, base, min, max, step)	\
236 	[_chip ## _ ## _name] = {	\
237 		.desc = {	\
238 			.name = #_name,\
239 			.n_voltages = ((max) - (min)) / (step) + 1,	\
240 			.ops = &pfuze100_sw_regulator_ops,	\
241 			.type = REGULATOR_VOLTAGE,	\
242 			.id = _chip ## _ ## _name,	\
243 			.owner = THIS_MODULE,	\
244 			.min_uV = (min),	\
245 			.uV_step = (step),	\
246 			.vsel_reg = (base) + PFUZE100_VOL_OFFSET,	\
247 			.vsel_mask = 0x3f,	\
248 			.enable_reg = (base) + PFUZE100_MODE_OFFSET,	\
249 			.enable_mask = 0xf,	\
250 		},	\
251 		.stby_reg = (base) + PFUZE100_STANDBY_OFFSET,	\
252 		.stby_mask = 0x3f,	\
253 		.sw_reg = true,		\
254 	}
255 
256 #define PFUZE100_SWB_REG(_chip, _name, base, mask, voltages)	\
257 	[_chip ## _ ##  _name] = {	\
258 		.desc = {	\
259 			.name = #_name,	\
260 			.n_voltages = ARRAY_SIZE(voltages),	\
261 			.ops = &pfuze100_swb_regulator_ops,	\
262 			.type = REGULATOR_VOLTAGE,	\
263 			.id = _chip ## _ ## _name,	\
264 			.owner = THIS_MODULE,	\
265 			.volt_table = voltages,	\
266 			.vsel_reg = (base),	\
267 			.vsel_mask = (mask),	\
268 			.enable_reg = (base),	\
269 			.enable_mask = 0x48,	\
270 		},	\
271 	}
272 
273 #define PFUZE100_VGEN_REG(_chip, _name, base, min, max, step)	\
274 	[_chip ## _ ## _name] = {	\
275 		.desc = {	\
276 			.name = #_name,	\
277 			.n_voltages = ((max) - (min)) / (step) + 1,	\
278 			.ops = &pfuze100_ldo_regulator_ops,	\
279 			.type = REGULATOR_VOLTAGE,	\
280 			.id = _chip ## _ ## _name,	\
281 			.owner = THIS_MODULE,	\
282 			.min_uV = (min),	\
283 			.uV_step = (step),	\
284 			.vsel_reg = (base),	\
285 			.vsel_mask = 0xf,	\
286 			.enable_reg = (base),	\
287 			.enable_mask = 0x10,	\
288 		},	\
289 		.stby_reg = (base),	\
290 		.stby_mask = 0x20,	\
291 	}
292 
293 #define PFUZE100_COIN_REG(_chip, _name, base, mask, voltages)	\
294 	[_chip ## _ ##  _name] = {	\
295 		.desc = {	\
296 			.name = #_name,	\
297 			.n_voltages = ARRAY_SIZE(voltages),	\
298 			.ops = &pfuze100_swb_regulator_ops,	\
299 			.type = REGULATOR_VOLTAGE,	\
300 			.id = _chip ## _ ## _name,	\
301 			.owner = THIS_MODULE,	\
302 			.volt_table = voltages,	\
303 			.vsel_reg = (base),	\
304 			.vsel_mask = (mask),	\
305 			.enable_reg = (base),	\
306 			.enable_mask = 0x8,	\
307 		},	\
308 	}
309 
310 #define PFUZE3000_VCC_REG(_chip, _name, base, min, max, step)	{	\
311 	.desc = {	\
312 		.name = #_name,	\
313 		.n_voltages = ((max) - (min)) / (step) + 1,	\
314 		.ops = &pfuze100_ldo_regulator_ops,	\
315 		.type = REGULATOR_VOLTAGE,	\
316 		.id = _chip ## _ ## _name,	\
317 		.owner = THIS_MODULE,	\
318 		.min_uV = (min),	\
319 		.uV_step = (step),	\
320 		.vsel_reg = (base),	\
321 		.vsel_mask = 0x3,	\
322 		.enable_reg = (base),	\
323 		.enable_mask = 0x10,	\
324 	},	\
325 	.stby_reg = (base),	\
326 	.stby_mask = 0x20,	\
327 }
328 
329 /* No linar case for the some switches of PFUZE3000 */
330 #define PFUZE3000_SW_REG(_chip, _name, base, mask, voltages)	\
331 	[_chip ## _ ##  _name] = {	\
332 		.desc = {	\
333 			.name = #_name,	\
334 			.n_voltages = ARRAY_SIZE(voltages),	\
335 			.ops = &pfuze3000_sw_regulator_ops,	\
336 			.type = REGULATOR_VOLTAGE,	\
337 			.id = _chip ## _ ## _name,	\
338 			.owner = THIS_MODULE,	\
339 			.volt_table = voltages,	\
340 			.vsel_reg = (base) + PFUZE100_VOL_OFFSET,	\
341 			.vsel_mask = (mask),	\
342 			.enable_reg = (base) + PFUZE100_MODE_OFFSET,	\
343 			.enable_mask = 0xf,	\
344 			.enable_val = 0x8,	\
345 			.enable_time = 500,	\
346 		},	\
347 		.stby_reg = (base) + PFUZE100_STANDBY_OFFSET,	\
348 		.stby_mask = (mask),	\
349 		.sw_reg = true,		\
350 	}
351 
352 #define PFUZE3000_SW3_REG(_chip, _name, base, min, max, step)	{	\
353 	.desc = {	\
354 		.name = #_name,\
355 		.n_voltages = ((max) - (min)) / (step) + 1,	\
356 		.ops = &pfuze100_sw_regulator_ops,	\
357 		.type = REGULATOR_VOLTAGE,	\
358 		.id = _chip ## _ ## _name,	\
359 		.owner = THIS_MODULE,	\
360 		.min_uV = (min),	\
361 		.uV_step = (step),	\
362 		.vsel_reg = (base) + PFUZE100_VOL_OFFSET,	\
363 		.vsel_mask = 0xf,	\
364 	},	\
365 	.stby_reg = (base) + PFUZE100_STANDBY_OFFSET,	\
366 	.stby_mask = 0xf,	\
367 }
368 
369 /* PFUZE100 */
370 static struct pfuze_regulator pfuze100_regulators[] = {
371 	PFUZE100_SW_REG(PFUZE100, SW1AB, PFUZE100_SW1ABVOL, 300000, 1875000, 25000),
372 	PFUZE100_SW_REG(PFUZE100, SW1C, PFUZE100_SW1CVOL, 300000, 1875000, 25000),
373 	PFUZE100_SW_REG(PFUZE100, SW2, PFUZE100_SW2VOL, 400000, 1975000, 25000),
374 	PFUZE100_SW_REG(PFUZE100, SW3A, PFUZE100_SW3AVOL, 400000, 1975000, 25000),
375 	PFUZE100_SW_REG(PFUZE100, SW3B, PFUZE100_SW3BVOL, 400000, 1975000, 25000),
376 	PFUZE100_SW_REG(PFUZE100, SW4, PFUZE100_SW4VOL, 400000, 1975000, 25000),
377 	PFUZE100_SWB_REG(PFUZE100, SWBST, PFUZE100_SWBSTCON1, 0x3 , pfuze100_swbst),
378 	PFUZE100_SWB_REG(PFUZE100, VSNVS, PFUZE100_VSNVSVOL, 0x7, pfuze100_vsnvs),
379 	PFUZE100_FIXED_REG(PFUZE100, VREFDDR, PFUZE100_VREFDDRCON, 750000),
380 	PFUZE100_VGEN_REG(PFUZE100, VGEN1, PFUZE100_VGEN1VOL, 800000, 1550000, 50000),
381 	PFUZE100_VGEN_REG(PFUZE100, VGEN2, PFUZE100_VGEN2VOL, 800000, 1550000, 50000),
382 	PFUZE100_VGEN_REG(PFUZE100, VGEN3, PFUZE100_VGEN3VOL, 1800000, 3300000, 100000),
383 	PFUZE100_VGEN_REG(PFUZE100, VGEN4, PFUZE100_VGEN4VOL, 1800000, 3300000, 100000),
384 	PFUZE100_VGEN_REG(PFUZE100, VGEN5, PFUZE100_VGEN5VOL, 1800000, 3300000, 100000),
385 	PFUZE100_VGEN_REG(PFUZE100, VGEN6, PFUZE100_VGEN6VOL, 1800000, 3300000, 100000),
386 	PFUZE100_COIN_REG(PFUZE100, COIN, PFUZE100_COINVOL, 0x7, pfuze100_coin),
387 };
388 
389 static struct pfuze_regulator pfuze200_regulators[] = {
390 	PFUZE100_SW_REG(PFUZE200, SW1AB, PFUZE100_SW1ABVOL, 300000, 1875000, 25000),
391 	PFUZE100_SW_REG(PFUZE200, SW2, PFUZE100_SW2VOL, 400000, 1975000, 25000),
392 	PFUZE100_SW_REG(PFUZE200, SW3A, PFUZE100_SW3AVOL, 400000, 1975000, 25000),
393 	PFUZE100_SW_REG(PFUZE200, SW3B, PFUZE100_SW3BVOL, 400000, 1975000, 25000),
394 	PFUZE100_SWB_REG(PFUZE200, SWBST, PFUZE100_SWBSTCON1, 0x3 , pfuze100_swbst),
395 	PFUZE100_SWB_REG(PFUZE200, VSNVS, PFUZE100_VSNVSVOL, 0x7, pfuze100_vsnvs),
396 	PFUZE100_FIXED_REG(PFUZE200, VREFDDR, PFUZE100_VREFDDRCON, 750000),
397 	PFUZE100_VGEN_REG(PFUZE200, VGEN1, PFUZE100_VGEN1VOL, 800000, 1550000, 50000),
398 	PFUZE100_VGEN_REG(PFUZE200, VGEN2, PFUZE100_VGEN2VOL, 800000, 1550000, 50000),
399 	PFUZE100_VGEN_REG(PFUZE200, VGEN3, PFUZE100_VGEN3VOL, 1800000, 3300000, 100000),
400 	PFUZE100_VGEN_REG(PFUZE200, VGEN4, PFUZE100_VGEN4VOL, 1800000, 3300000, 100000),
401 	PFUZE100_VGEN_REG(PFUZE200, VGEN5, PFUZE100_VGEN5VOL, 1800000, 3300000, 100000),
402 	PFUZE100_VGEN_REG(PFUZE200, VGEN6, PFUZE100_VGEN6VOL, 1800000, 3300000, 100000),
403 	PFUZE100_COIN_REG(PFUZE200, COIN, PFUZE100_COINVOL, 0x7, pfuze100_coin),
404 };
405 
406 static struct pfuze_regulator pfuze3000_regulators[] = {
407 	PFUZE3000_SW_REG(PFUZE3000, SW1A, PFUZE100_SW1ABVOL, 0x1f, pfuze3000_sw1a),
408 	PFUZE100_SW_REG(PFUZE3000, SW1B, PFUZE100_SW1CVOL, 700000, 1475000, 25000),
409 	PFUZE3000_SW_REG(PFUZE3000, SW2, PFUZE100_SW2VOL, 0x7, pfuze3000_sw2lo),
410 	PFUZE3000_SW3_REG(PFUZE3000, SW3, PFUZE100_SW3AVOL, 900000, 1650000, 50000),
411 	PFUZE100_SWB_REG(PFUZE3000, SWBST, PFUZE100_SWBSTCON1, 0x3, pfuze100_swbst),
412 	PFUZE100_SWB_REG(PFUZE3000, VSNVS, PFUZE100_VSNVSVOL, 0x7, pfuze100_vsnvs),
413 	PFUZE100_FIXED_REG(PFUZE3000, VREFDDR, PFUZE100_VREFDDRCON, 750000),
414 	PFUZE100_VGEN_REG(PFUZE3000, VLDO1, PFUZE100_VGEN1VOL, 1800000, 3300000, 100000),
415 	PFUZE100_VGEN_REG(PFUZE3000, VLDO2, PFUZE100_VGEN2VOL, 800000, 1550000, 50000),
416 	PFUZE3000_VCC_REG(PFUZE3000, VCCSD, PFUZE100_VGEN3VOL, 2850000, 3300000, 150000),
417 	PFUZE3000_VCC_REG(PFUZE3000, V33, PFUZE100_VGEN4VOL, 2850000, 3300000, 150000),
418 	PFUZE100_VGEN_REG(PFUZE3000, VLDO3, PFUZE100_VGEN5VOL, 1800000, 3300000, 100000),
419 	PFUZE100_VGEN_REG(PFUZE3000, VLDO4, PFUZE100_VGEN6VOL, 1800000, 3300000, 100000),
420 };
421 
422 static struct pfuze_regulator pfuze3001_regulators[] = {
423 	PFUZE3000_SW_REG(PFUZE3001, SW1, PFUZE100_SW1ABVOL, 0x1f, pfuze3000_sw1a),
424 	PFUZE3000_SW_REG(PFUZE3001, SW2, PFUZE100_SW2VOL, 0x7, pfuze3000_sw2lo),
425 	PFUZE3000_SW3_REG(PFUZE3001, SW3, PFUZE100_SW3AVOL, 900000, 1650000, 50000),
426 	PFUZE100_SWB_REG(PFUZE3001, VSNVS, PFUZE100_VSNVSVOL, 0x7, pfuze100_vsnvs),
427 	PFUZE100_VGEN_REG(PFUZE3001, VLDO1, PFUZE100_VGEN1VOL, 1800000, 3300000, 100000),
428 	PFUZE100_VGEN_REG(PFUZE3001, VLDO2, PFUZE100_VGEN2VOL, 800000, 1550000, 50000),
429 	PFUZE3000_VCC_REG(PFUZE3001, VCCSD, PFUZE100_VGEN3VOL, 2850000, 3300000, 150000),
430 	PFUZE3000_VCC_REG(PFUZE3001, V33, PFUZE100_VGEN4VOL, 2850000, 3300000, 150000),
431 	PFUZE100_VGEN_REG(PFUZE3001, VLDO3, PFUZE100_VGEN5VOL, 1800000, 3300000, 100000),
432 	PFUZE100_VGEN_REG(PFUZE3001, VLDO4, PFUZE100_VGEN6VOL, 1800000, 3300000, 100000),
433 };
434 
435 /* PFUZE100 */
436 static struct of_regulator_match pfuze100_matches[] = {
437 	{ .name = "sw1ab",	},
438 	{ .name = "sw1c",	},
439 	{ .name = "sw2",	},
440 	{ .name = "sw3a",	},
441 	{ .name = "sw3b",	},
442 	{ .name = "sw4",	},
443 	{ .name = "swbst",	},
444 	{ .name = "vsnvs",	},
445 	{ .name = "vrefddr",	},
446 	{ .name = "vgen1",	},
447 	{ .name = "vgen2",	},
448 	{ .name = "vgen3",	},
449 	{ .name = "vgen4",	},
450 	{ .name = "vgen5",	},
451 	{ .name = "vgen6",	},
452 	{ .name = "coin",	},
453 };
454 
455 /* PFUZE200 */
456 static struct of_regulator_match pfuze200_matches[] = {
457 
458 	{ .name = "sw1ab",	},
459 	{ .name = "sw2",	},
460 	{ .name = "sw3a",	},
461 	{ .name = "sw3b",	},
462 	{ .name = "swbst",	},
463 	{ .name = "vsnvs",	},
464 	{ .name = "vrefddr",	},
465 	{ .name = "vgen1",	},
466 	{ .name = "vgen2",	},
467 	{ .name = "vgen3",	},
468 	{ .name = "vgen4",	},
469 	{ .name = "vgen5",	},
470 	{ .name = "vgen6",	},
471 	{ .name = "coin",	},
472 };
473 
474 /* PFUZE3000 */
475 static struct of_regulator_match pfuze3000_matches[] = {
476 
477 	{ .name = "sw1a",	},
478 	{ .name = "sw1b",	},
479 	{ .name = "sw2",	},
480 	{ .name = "sw3",	},
481 	{ .name = "swbst",	},
482 	{ .name = "vsnvs",	},
483 	{ .name = "vrefddr",	},
484 	{ .name = "vldo1",	},
485 	{ .name = "vldo2",	},
486 	{ .name = "vccsd",	},
487 	{ .name = "v33",	},
488 	{ .name = "vldo3",	},
489 	{ .name = "vldo4",	},
490 };
491 
492 /* PFUZE3001 */
493 static struct of_regulator_match pfuze3001_matches[] = {
494 
495 	{ .name = "sw1",	},
496 	{ .name = "sw2",	},
497 	{ .name = "sw3",	},
498 	{ .name = "vsnvs",	},
499 	{ .name = "vldo1",	},
500 	{ .name = "vldo2",	},
501 	{ .name = "vccsd",	},
502 	{ .name = "v33",	},
503 	{ .name = "vldo3",	},
504 	{ .name = "vldo4",	},
505 };
506 
507 static struct of_regulator_match *pfuze_matches;
508 
509 static int pfuze_parse_regulators_dt(struct pfuze_chip *chip)
510 {
511 	struct device *dev = chip->dev;
512 	struct device_node *np, *parent;
513 	int ret;
514 
515 	np = of_node_get(dev->of_node);
516 	if (!np)
517 		return -EINVAL;
518 
519 	if (of_property_read_bool(np, "fsl,pfuze-support-disable-sw"))
520 		chip->flags |= PFUZE_FLAG_DISABLE_SW;
521 
522 	parent = of_get_child_by_name(np, "regulators");
523 	if (!parent) {
524 		dev_err(dev, "regulators node not found\n");
525 		of_node_put(np);
526 		return -EINVAL;
527 	}
528 
529 	switch (chip->chip_id) {
530 	case PFUZE3001:
531 		pfuze_matches = pfuze3001_matches;
532 		ret = of_regulator_match(dev, parent, pfuze3001_matches,
533 					 ARRAY_SIZE(pfuze3001_matches));
534 		break;
535 	case PFUZE3000:
536 		pfuze_matches = pfuze3000_matches;
537 		ret = of_regulator_match(dev, parent, pfuze3000_matches,
538 					 ARRAY_SIZE(pfuze3000_matches));
539 		break;
540 	case PFUZE200:
541 		pfuze_matches = pfuze200_matches;
542 		ret = of_regulator_match(dev, parent, pfuze200_matches,
543 					 ARRAY_SIZE(pfuze200_matches));
544 		break;
545 
546 	case PFUZE100:
547 	default:
548 		pfuze_matches = pfuze100_matches;
549 		ret = of_regulator_match(dev, parent, pfuze100_matches,
550 					 ARRAY_SIZE(pfuze100_matches));
551 		break;
552 	}
553 
554 	of_node_put(parent);
555 	of_node_put(np);
556 	if (ret < 0) {
557 		dev_err(dev, "Error parsing regulator init data: %d\n",
558 			ret);
559 		return ret;
560 	}
561 
562 	return 0;
563 }
564 
565 static inline struct regulator_init_data *match_init_data(int index)
566 {
567 	return pfuze_matches[index].init_data;
568 }
569 
570 static inline struct device_node *match_of_node(int index)
571 {
572 	return pfuze_matches[index].of_node;
573 }
574 
575 static int pfuze_power_off_prepare(struct sys_off_data *data)
576 {
577 	struct pfuze_chip *syspm_pfuze_chip = data->cb_data;
578 
579 	dev_info(syspm_pfuze_chip->dev, "Configure standby mode for power off");
580 
581 	/* Switch from default mode: APS/APS to APS/Off */
582 	regmap_update_bits(syspm_pfuze_chip->regmap, PFUZE100_SW1ABMODE,
583 			   PFUZE100_SWxMODE_MASK, PFUZE100_SWxMODE_APS_OFF);
584 	regmap_update_bits(syspm_pfuze_chip->regmap, PFUZE100_SW1CMODE,
585 			   PFUZE100_SWxMODE_MASK, PFUZE100_SWxMODE_APS_OFF);
586 	regmap_update_bits(syspm_pfuze_chip->regmap, PFUZE100_SW2MODE,
587 			   PFUZE100_SWxMODE_MASK, PFUZE100_SWxMODE_APS_OFF);
588 	regmap_update_bits(syspm_pfuze_chip->regmap, PFUZE100_SW3AMODE,
589 			   PFUZE100_SWxMODE_MASK, PFUZE100_SWxMODE_APS_OFF);
590 	regmap_update_bits(syspm_pfuze_chip->regmap, PFUZE100_SW3BMODE,
591 			   PFUZE100_SWxMODE_MASK, PFUZE100_SWxMODE_APS_OFF);
592 	regmap_update_bits(syspm_pfuze_chip->regmap, PFUZE100_SW4MODE,
593 			   PFUZE100_SWxMODE_MASK, PFUZE100_SWxMODE_APS_OFF);
594 
595 	regmap_update_bits(syspm_pfuze_chip->regmap, PFUZE100_VGEN1VOL,
596 			   PFUZE100_VGENxLPWR | PFUZE100_VGENxSTBY,
597 			   PFUZE100_VGENxSTBY);
598 	regmap_update_bits(syspm_pfuze_chip->regmap, PFUZE100_VGEN2VOL,
599 			   PFUZE100_VGENxLPWR | PFUZE100_VGENxSTBY,
600 			   PFUZE100_VGENxSTBY);
601 	regmap_update_bits(syspm_pfuze_chip->regmap, PFUZE100_VGEN3VOL,
602 			   PFUZE100_VGENxLPWR | PFUZE100_VGENxSTBY,
603 			   PFUZE100_VGENxSTBY);
604 	regmap_update_bits(syspm_pfuze_chip->regmap, PFUZE100_VGEN4VOL,
605 			   PFUZE100_VGENxLPWR | PFUZE100_VGENxSTBY,
606 			   PFUZE100_VGENxSTBY);
607 	regmap_update_bits(syspm_pfuze_chip->regmap, PFUZE100_VGEN5VOL,
608 			   PFUZE100_VGENxLPWR | PFUZE100_VGENxSTBY,
609 			   PFUZE100_VGENxSTBY);
610 	regmap_update_bits(syspm_pfuze_chip->regmap, PFUZE100_VGEN6VOL,
611 			   PFUZE100_VGENxLPWR | PFUZE100_VGENxSTBY,
612 			   PFUZE100_VGENxSTBY);
613 
614 	return NOTIFY_DONE;
615 }
616 
617 static int pfuze_power_off_prepare_init(struct pfuze_chip *pfuze_chip)
618 {
619 	int err;
620 
621 	if (pfuze_chip->chip_id != PFUZE100) {
622 		dev_warn(pfuze_chip->dev, "Requested pm_power_off_prepare handler for not supported chip\n");
623 		return -ENODEV;
624 	}
625 
626 	err = devm_register_sys_off_handler(pfuze_chip->dev,
627 					    SYS_OFF_MODE_POWER_OFF_PREPARE,
628 					    SYS_OFF_PRIO_DEFAULT,
629 					    pfuze_power_off_prepare,
630 					    pfuze_chip);
631 	if (err) {
632 		dev_err(pfuze_chip->dev, "failed to register sys-off handler: %d\n",
633 			err);
634 		return err;
635 	}
636 
637 	return 0;
638 }
639 
640 static int pfuze_identify(struct pfuze_chip *pfuze_chip)
641 {
642 	unsigned int value;
643 	int ret;
644 
645 	ret = regmap_read(pfuze_chip->regmap, PFUZE100_DEVICEID, &value);
646 	if (ret)
647 		return ret;
648 
649 	if (((value & 0x0f) == 0x8) && (pfuze_chip->chip_id == PFUZE100)) {
650 		/*
651 		 * Freescale misprogrammed 1-3% of parts prior to week 8 of 2013
652 		 * as ID=8 in PFUZE100
653 		 */
654 		dev_info(pfuze_chip->dev, "Assuming misprogrammed ID=0x8");
655 	} else if ((value & 0x0f) != pfuze_chip->chip_id &&
656 		   (value & 0xf0) >> 4 != pfuze_chip->chip_id &&
657 		   (value != pfuze_chip->chip_id)) {
658 		/* device id NOT match with your setting */
659 		dev_warn(pfuze_chip->dev, "Illegal ID: %x\n", value);
660 		return -ENODEV;
661 	}
662 
663 	ret = regmap_read(pfuze_chip->regmap, PFUZE100_REVID, &value);
664 	if (ret)
665 		return ret;
666 	dev_info(pfuze_chip->dev,
667 		 "Full layer: %x, Metal layer: %x\n",
668 		 (value & 0xf0) >> 4, value & 0x0f);
669 
670 	ret = regmap_read(pfuze_chip->regmap, PFUZE100_FABID, &value);
671 	if (ret)
672 		return ret;
673 	dev_info(pfuze_chip->dev, "FAB: %x, FIN: %x\n",
674 		 (value & 0xc) >> 2, value & 0x3);
675 
676 	return 0;
677 }
678 
679 static const struct regmap_config pfuze_regmap_config = {
680 	.reg_bits = 8,
681 	.val_bits = 8,
682 	.max_register = PFUZE_NUMREGS - 1,
683 	.cache_type = REGCACHE_RBTREE,
684 };
685 
686 static int pfuze100_regulator_probe(struct i2c_client *client,
687 				    const struct i2c_device_id *id)
688 {
689 	struct pfuze_chip *pfuze_chip;
690 	struct regulator_config config = { };
691 	int i, ret;
692 	const struct of_device_id *match;
693 	u32 regulator_num;
694 	u32 sw_check_start, sw_check_end, sw_hi = 0x40;
695 
696 	pfuze_chip = devm_kzalloc(&client->dev, sizeof(*pfuze_chip),
697 			GFP_KERNEL);
698 	if (!pfuze_chip)
699 		return -ENOMEM;
700 
701 	if (client->dev.of_node) {
702 		match = of_match_device(of_match_ptr(pfuze_dt_ids),
703 				&client->dev);
704 		if (!match) {
705 			dev_err(&client->dev, "Error: No device match found\n");
706 			return -ENODEV;
707 		}
708 		pfuze_chip->chip_id = (int)(long)match->data;
709 	} else if (id) {
710 		pfuze_chip->chip_id = id->driver_data;
711 	} else {
712 		dev_err(&client->dev, "No dts match or id table match found\n");
713 		return -ENODEV;
714 	}
715 
716 	i2c_set_clientdata(client, pfuze_chip);
717 	pfuze_chip->dev = &client->dev;
718 
719 	pfuze_chip->regmap = devm_regmap_init_i2c(client, &pfuze_regmap_config);
720 	if (IS_ERR(pfuze_chip->regmap)) {
721 		ret = PTR_ERR(pfuze_chip->regmap);
722 		dev_err(&client->dev,
723 			"regmap allocation failed with err %d\n", ret);
724 		return ret;
725 	}
726 
727 	ret = pfuze_identify(pfuze_chip);
728 	if (ret) {
729 		dev_err(&client->dev, "unrecognized pfuze chip ID!\n");
730 		return ret;
731 	}
732 
733 	/* use the right regulators after identify the right device */
734 	switch (pfuze_chip->chip_id) {
735 	case PFUZE3001:
736 		pfuze_chip->pfuze_regulators = pfuze3001_regulators;
737 		regulator_num = ARRAY_SIZE(pfuze3001_regulators);
738 		sw_check_start = PFUZE3001_SW2;
739 		sw_check_end = PFUZE3001_SW2;
740 		sw_hi = 1 << 3;
741 		break;
742 	case PFUZE3000:
743 		pfuze_chip->pfuze_regulators = pfuze3000_regulators;
744 		regulator_num = ARRAY_SIZE(pfuze3000_regulators);
745 		sw_check_start = PFUZE3000_SW2;
746 		sw_check_end = PFUZE3000_SW2;
747 		sw_hi = 1 << 3;
748 		break;
749 	case PFUZE200:
750 		pfuze_chip->pfuze_regulators = pfuze200_regulators;
751 		regulator_num = ARRAY_SIZE(pfuze200_regulators);
752 		sw_check_start = PFUZE200_SW2;
753 		sw_check_end = PFUZE200_SW3B;
754 		break;
755 	case PFUZE100:
756 	default:
757 		pfuze_chip->pfuze_regulators = pfuze100_regulators;
758 		regulator_num = ARRAY_SIZE(pfuze100_regulators);
759 		sw_check_start = PFUZE100_SW2;
760 		sw_check_end = PFUZE100_SW4;
761 		break;
762 	}
763 	dev_info(&client->dev, "pfuze%s found.\n",
764 		(pfuze_chip->chip_id == PFUZE100) ? "100" :
765 		(((pfuze_chip->chip_id == PFUZE200) ? "200" :
766 		((pfuze_chip->chip_id == PFUZE3000) ? "3000" : "3001"))));
767 
768 	memcpy(pfuze_chip->regulator_descs, pfuze_chip->pfuze_regulators,
769 		sizeof(pfuze_chip->regulator_descs));
770 
771 	ret = pfuze_parse_regulators_dt(pfuze_chip);
772 	if (ret)
773 		return ret;
774 
775 	for (i = 0; i < regulator_num; i++) {
776 		struct regulator_init_data *init_data;
777 		struct regulator_desc *desc;
778 		int val;
779 
780 		desc = &pfuze_chip->regulator_descs[i].desc;
781 
782 		init_data = match_init_data(i);
783 
784 		/* SW2~SW4 high bit check and modify the voltage value table */
785 		if (i >= sw_check_start && i <= sw_check_end) {
786 			ret = regmap_read(pfuze_chip->regmap,
787 						desc->vsel_reg, &val);
788 			if (ret) {
789 				dev_err(&client->dev, "Fails to read from the register.\n");
790 				return ret;
791 			}
792 
793 			if (val & sw_hi) {
794 				if (pfuze_chip->chip_id == PFUZE3000 ||
795 					pfuze_chip->chip_id == PFUZE3001) {
796 					desc->volt_table = pfuze3000_sw2hi;
797 					desc->n_voltages = ARRAY_SIZE(pfuze3000_sw2hi);
798 				} else {
799 					desc->min_uV = 800000;
800 					desc->uV_step = 50000;
801 					desc->n_voltages = 51;
802 				}
803 			}
804 		}
805 
806 		/*
807 		 * Allow SW regulators to turn off. Checking it trough a flag is
808 		 * a workaround to keep the backward compatibility with existing
809 		 * old dtb's which may relay on the fact that we didn't disable
810 		 * the switched regulator till yet.
811 		 */
812 		if (pfuze_chip->flags & PFUZE_FLAG_DISABLE_SW) {
813 			if (pfuze_chip->chip_id == PFUZE100 ||
814 				pfuze_chip->chip_id == PFUZE200) {
815 				if (pfuze_chip->regulator_descs[i].sw_reg) {
816 					desc->ops = &pfuze100_sw_disable_regulator_ops;
817 					desc->enable_val = 0x8;
818 					desc->disable_val = 0x0;
819 					desc->enable_time = 500;
820 				}
821 			}
822 		}
823 
824 		config.dev = &client->dev;
825 		config.init_data = init_data;
826 		config.driver_data = pfuze_chip;
827 		config.of_node = match_of_node(i);
828 
829 		pfuze_chip->regulators[i] =
830 			devm_regulator_register(&client->dev, desc, &config);
831 		if (IS_ERR(pfuze_chip->regulators[i])) {
832 			dev_err(&client->dev, "register regulator%s failed\n",
833 				pfuze_chip->pfuze_regulators[i].desc.name);
834 			return PTR_ERR(pfuze_chip->regulators[i]);
835 		}
836 	}
837 
838 	if (of_property_read_bool(client->dev.of_node,
839 				  "fsl,pmic-stby-poweroff"))
840 		return pfuze_power_off_prepare_init(pfuze_chip);
841 
842 	return 0;
843 }
844 
845 static struct i2c_driver pfuze_driver = {
846 	.driver = {
847 		.name = "pfuze100-regulator",
848 		.of_match_table = pfuze_dt_ids,
849 	},
850 	.probe = pfuze100_regulator_probe,
851 };
852 module_i2c_driver(pfuze_driver);
853 
854 MODULE_AUTHOR("Robin Gong <b38343@freescale.com>");
855 MODULE_DESCRIPTION("Regulator Driver for Freescale PFUZE100/200/3000/3001 PMIC");
856 MODULE_LICENSE("GPL v2");
857