1 // SPDX-License-Identifier: GPL-2.0
2 //
3 // Regulator Driver for Freescale MC13892 PMIC
4 //
5 // Copyright 2010 Yong Shen <yong.shen@linaro.org>
6 //
7 // Based on draft driver from Arnaud Patard <arnaud.patard@rtp-net.org>
8 
9 #include <linux/mfd/mc13892.h>
10 #include <linux/regulator/machine.h>
11 #include <linux/regulator/driver.h>
12 #include <linux/platform_device.h>
13 #include <linux/kernel.h>
14 #include <linux/slab.h>
15 #include <linux/init.h>
16 #include <linux/err.h>
17 #include <linux/module.h>
18 #include "mc13xxx.h"
19 
20 #define MC13892_REVISION			7
21 
22 #define MC13892_POWERCTL0			13
23 #define MC13892_POWERCTL0_USEROFFSPI		3
24 #define MC13892_POWERCTL0_VCOINCELLVSEL		20
25 #define MC13892_POWERCTL0_VCOINCELLVSEL_M	(7<<20)
26 #define MC13892_POWERCTL0_VCOINCELLEN		(1<<23)
27 
28 #define MC13892_SWITCHERS0_SWxHI		(1<<23)
29 
30 #define MC13892_SWITCHERS0			24
31 #define MC13892_SWITCHERS0_SW1VSEL		0
32 #define MC13892_SWITCHERS0_SW1VSEL_M		(0x1f<<0)
33 #define MC13892_SWITCHERS0_SW1HI		(1<<23)
34 #define MC13892_SWITCHERS0_SW1EN		0
35 
36 #define MC13892_SWITCHERS1			25
37 #define MC13892_SWITCHERS1_SW2VSEL		0
38 #define MC13892_SWITCHERS1_SW2VSEL_M		(0x1f<<0)
39 #define MC13892_SWITCHERS1_SW2HI		(1<<23)
40 #define MC13892_SWITCHERS1_SW2EN		0
41 
42 #define MC13892_SWITCHERS2			26
43 #define MC13892_SWITCHERS2_SW3VSEL		0
44 #define MC13892_SWITCHERS2_SW3VSEL_M		(0x1f<<0)
45 #define MC13892_SWITCHERS2_SW3HI		(1<<23)
46 #define MC13892_SWITCHERS2_SW3EN		0
47 
48 #define MC13892_SWITCHERS3			27
49 #define MC13892_SWITCHERS3_SW4VSEL		0
50 #define MC13892_SWITCHERS3_SW4VSEL_M		(0x1f<<0)
51 #define MC13892_SWITCHERS3_SW4HI		(1<<23)
52 #define MC13892_SWITCHERS3_SW4EN		0
53 
54 #define MC13892_SWITCHERS4			28
55 #define MC13892_SWITCHERS4_SW1MODE		0
56 #define MC13892_SWITCHERS4_SW1MODE_AUTO		(8<<0)
57 #define MC13892_SWITCHERS4_SW1MODE_M		(0xf<<0)
58 #define MC13892_SWITCHERS4_SW2MODE		10
59 #define MC13892_SWITCHERS4_SW2MODE_AUTO		(8<<10)
60 #define MC13892_SWITCHERS4_SW2MODE_M		(0xf<<10)
61 
62 #define MC13892_SWITCHERS5			29
63 #define MC13892_SWITCHERS5_SW3MODE		0
64 #define MC13892_SWITCHERS5_SW3MODE_AUTO		(8<<0)
65 #define MC13892_SWITCHERS5_SW3MODE_M		(0xf<<0)
66 #define MC13892_SWITCHERS5_SW4MODE		8
67 #define MC13892_SWITCHERS5_SW4MODE_AUTO		(8<<8)
68 #define MC13892_SWITCHERS5_SW4MODE_M		(0xf<<8)
69 #define MC13892_SWITCHERS5_SWBSTEN		(1<<20)
70 
71 #define MC13892_REGULATORSETTING0		30
72 #define MC13892_REGULATORSETTING0_VGEN1VSEL	0
73 #define MC13892_REGULATORSETTING0_VDIGVSEL	4
74 #define MC13892_REGULATORSETTING0_VGEN2VSEL	6
75 #define MC13892_REGULATORSETTING0_VPLLVSEL	9
76 #define MC13892_REGULATORSETTING0_VUSB2VSEL	11
77 #define MC13892_REGULATORSETTING0_VGEN3VSEL	14
78 #define MC13892_REGULATORSETTING0_VCAMVSEL	16
79 
80 #define MC13892_REGULATORSETTING0_VGEN1VSEL_M	(3<<0)
81 #define MC13892_REGULATORSETTING0_VDIGVSEL_M	(3<<4)
82 #define MC13892_REGULATORSETTING0_VGEN2VSEL_M	(7<<6)
83 #define MC13892_REGULATORSETTING0_VPLLVSEL_M	(3<<9)
84 #define MC13892_REGULATORSETTING0_VUSB2VSEL_M	(3<<11)
85 #define MC13892_REGULATORSETTING0_VGEN3VSEL_M	(1<<14)
86 #define MC13892_REGULATORSETTING0_VCAMVSEL_M	(3<<16)
87 
88 #define MC13892_REGULATORSETTING1		31
89 #define MC13892_REGULATORSETTING1_VVIDEOVSEL	2
90 #define MC13892_REGULATORSETTING1_VAUDIOVSEL	4
91 #define MC13892_REGULATORSETTING1_VSDVSEL	6
92 
93 #define MC13892_REGULATORSETTING1_VVIDEOVSEL_M	(3<<2)
94 #define MC13892_REGULATORSETTING1_VAUDIOVSEL_M	(3<<4)
95 #define MC13892_REGULATORSETTING1_VSDVSEL_M	(7<<6)
96 
97 #define MC13892_REGULATORMODE0			32
98 #define MC13892_REGULATORMODE0_VGEN1EN		(1<<0)
99 #define MC13892_REGULATORMODE0_VGEN1STDBY	(1<<1)
100 #define MC13892_REGULATORMODE0_VGEN1MODE	(1<<2)
101 #define MC13892_REGULATORMODE0_VIOHIEN		(1<<3)
102 #define MC13892_REGULATORMODE0_VIOHISTDBY	(1<<4)
103 #define MC13892_REGULATORMODE0_VIOHIMODE	(1<<5)
104 #define MC13892_REGULATORMODE0_VDIGEN		(1<<9)
105 #define MC13892_REGULATORMODE0_VDIGSTDBY	(1<<10)
106 #define MC13892_REGULATORMODE0_VDIGMODE		(1<<11)
107 #define MC13892_REGULATORMODE0_VGEN2EN		(1<<12)
108 #define MC13892_REGULATORMODE0_VGEN2STDBY	(1<<13)
109 #define MC13892_REGULATORMODE0_VGEN2MODE	(1<<14)
110 #define MC13892_REGULATORMODE0_VPLLEN		(1<<15)
111 #define MC13892_REGULATORMODE0_VPLLSTDBY	(1<<16)
112 #define MC13892_REGULATORMODE0_VPLLMODE		(1<<17)
113 #define MC13892_REGULATORMODE0_VUSB2EN		(1<<18)
114 #define MC13892_REGULATORMODE0_VUSB2STDBY	(1<<19)
115 #define MC13892_REGULATORMODE0_VUSB2MODE	(1<<20)
116 
117 #define MC13892_REGULATORMODE1			33
118 #define MC13892_REGULATORMODE1_VGEN3EN		(1<<0)
119 #define MC13892_REGULATORMODE1_VGEN3STDBY	(1<<1)
120 #define MC13892_REGULATORMODE1_VGEN3MODE	(1<<2)
121 #define MC13892_REGULATORMODE1_VCAMEN		(1<<6)
122 #define MC13892_REGULATORMODE1_VCAMSTDBY	(1<<7)
123 #define MC13892_REGULATORMODE1_VCAMMODE		(1<<8)
124 #define MC13892_REGULATORMODE1_VCAMCONFIGEN	(1<<9)
125 #define MC13892_REGULATORMODE1_VVIDEOEN		(1<<12)
126 #define MC13892_REGULATORMODE1_VVIDEOSTDBY	(1<<13)
127 #define MC13892_REGULATORMODE1_VVIDEOMODE	(1<<14)
128 #define MC13892_REGULATORMODE1_VAUDIOEN		(1<<15)
129 #define MC13892_REGULATORMODE1_VAUDIOSTDBY	(1<<16)
130 #define MC13892_REGULATORMODE1_VAUDIOMODE	(1<<17)
131 #define MC13892_REGULATORMODE1_VSDEN		(1<<18)
132 #define MC13892_REGULATORMODE1_VSDSTDBY		(1<<19)
133 #define MC13892_REGULATORMODE1_VSDMODE		(1<<20)
134 
135 #define MC13892_POWERMISC			34
136 #define MC13892_POWERMISC_GPO1EN		(1<<6)
137 #define MC13892_POWERMISC_GPO2EN		(1<<8)
138 #define MC13892_POWERMISC_GPO3EN		(1<<10)
139 #define MC13892_POWERMISC_GPO4EN		(1<<12)
140 #define MC13892_POWERMISC_PWGT1SPIEN		(1<<15)
141 #define MC13892_POWERMISC_PWGT2SPIEN		(1<<16)
142 #define MC13892_POWERMISC_GPO4ADINEN		(1<<21)
143 
144 #define MC13892_POWERMISC_PWGTSPI_M		(3 << 15)
145 
146 #define MC13892_USB1				50
147 #define MC13892_USB1_VUSBEN			(1<<3)
148 
149 static const unsigned int mc13892_vcoincell[] = {
150 	2500000, 2700000, 2800000, 2900000, 3000000, 3100000,
151 	3200000, 3300000,
152 };
153 
154 static const unsigned int mc13892_sw1[] = {
155 	600000,   625000,  650000,  675000,  700000,  725000,
156 	750000,   775000,  800000,  825000,  850000,  875000,
157 	900000,   925000,  950000,  975000, 1000000, 1025000,
158 	1050000, 1075000, 1100000, 1125000, 1150000, 1175000,
159 	1200000, 1225000, 1250000, 1275000, 1300000, 1325000,
160 	1350000, 1375000
161 };
162 
163 /*
164  * Note: this table is used to derive SWxVSEL by index into
165  * the array. Offset the values by the index of 1100000uV
166  * to get the actual register value for that voltage selector
167  * if the HI bit is to be set as well.
168  */
169 #define MC13892_SWxHI_SEL_OFFSET		20
170 
171 static const unsigned int mc13892_sw[] = {
172 	600000,   625000,  650000,  675000,  700000,  725000,
173 	750000,   775000,  800000,  825000,  850000,  875000,
174 	900000,   925000,  950000,  975000, 1000000, 1025000,
175 	1050000, 1075000, 1100000, 1125000, 1150000, 1175000,
176 	1200000, 1225000, 1250000, 1275000, 1300000, 1325000,
177 	1350000, 1375000, 1400000, 1425000, 1450000, 1475000,
178 	1500000, 1525000, 1550000, 1575000, 1600000, 1625000,
179 	1650000, 1675000, 1700000, 1725000, 1750000, 1775000,
180 	1800000, 1825000, 1850000, 1875000
181 };
182 
183 static const unsigned int mc13892_swbst[] = {
184 	5000000,
185 };
186 
187 static const unsigned int mc13892_viohi[] = {
188 	2775000,
189 };
190 
191 static const unsigned int mc13892_vpll[] = {
192 	1050000, 1250000, 1650000, 1800000,
193 };
194 
195 static const unsigned int mc13892_vdig[] = {
196 	1050000, 1250000, 1650000, 1800000,
197 };
198 
199 static const unsigned int mc13892_vsd[] = {
200 	1800000, 2000000, 2600000, 2700000,
201 	2800000, 2900000, 3000000, 3150000,
202 };
203 
204 static const unsigned int mc13892_vusb2[] = {
205 	2400000, 2600000, 2700000, 2775000,
206 };
207 
208 static const unsigned int mc13892_vvideo[] = {
209 	2700000, 2775000, 2500000, 2600000,
210 };
211 
212 static const unsigned int mc13892_vaudio[] = {
213 	2300000, 2500000, 2775000, 3000000,
214 };
215 
216 static const unsigned int mc13892_vcam[] = {
217 	2500000, 2600000, 2750000, 3000000,
218 };
219 
220 static const unsigned int mc13892_vgen1[] = {
221 	1200000, 1500000, 2775000, 3150000,
222 };
223 
224 static const unsigned int mc13892_vgen2[] = {
225 	1200000, 1500000, 1600000, 1800000,
226 	2700000, 2800000, 3000000, 3150000,
227 };
228 
229 static const unsigned int mc13892_vgen3[] = {
230 	1800000, 2900000,
231 };
232 
233 static const unsigned int mc13892_vusb[] = {
234 	3300000,
235 };
236 
237 static const unsigned int mc13892_gpo[] = {
238 	2750000,
239 };
240 
241 static const unsigned int mc13892_pwgtdrv[] = {
242 	5000000,
243 };
244 
245 static struct regulator_ops mc13892_gpo_regulator_ops;
246 static struct regulator_ops mc13892_sw_regulator_ops;
247 
248 
249 #define MC13892_FIXED_DEFINE(name, reg, voltages)		\
250 	MC13xxx_FIXED_DEFINE(MC13892_, name, reg, voltages,	\
251 			mc13xxx_fixed_regulator_ops)
252 
253 #define MC13892_GPO_DEFINE(name, reg, voltages)			\
254 	MC13xxx_GPO_DEFINE(MC13892_, name, reg, voltages,	\
255 			mc13892_gpo_regulator_ops)
256 
257 #define MC13892_SW_DEFINE(name, reg, vsel_reg, voltages)	\
258 	MC13xxx_DEFINE(MC13892_, name, reg, vsel_reg, voltages, \
259 			mc13892_sw_regulator_ops)
260 
261 #define MC13892_DEFINE_REGU(name, reg, vsel_reg, voltages)	\
262 	MC13xxx_DEFINE(MC13892_, name, reg, vsel_reg, voltages, \
263 			mc13xxx_regulator_ops)
264 
265 static struct mc13xxx_regulator mc13892_regulators[] = {
266 	MC13892_DEFINE_REGU(VCOINCELL, POWERCTL0, POWERCTL0, mc13892_vcoincell),
267 	MC13892_SW_DEFINE(SW1, SWITCHERS0, SWITCHERS0, mc13892_sw1),
268 	MC13892_SW_DEFINE(SW2, SWITCHERS1, SWITCHERS1, mc13892_sw),
269 	MC13892_SW_DEFINE(SW3, SWITCHERS2, SWITCHERS2, mc13892_sw),
270 	MC13892_SW_DEFINE(SW4, SWITCHERS3, SWITCHERS3, mc13892_sw),
271 	MC13892_FIXED_DEFINE(SWBST, SWITCHERS5, mc13892_swbst),
272 	MC13892_FIXED_DEFINE(VIOHI, REGULATORMODE0, mc13892_viohi),
273 	MC13892_DEFINE_REGU(VPLL, REGULATORMODE0, REGULATORSETTING0,
274 		mc13892_vpll),
275 	MC13892_DEFINE_REGU(VDIG, REGULATORMODE0, REGULATORSETTING0,
276 		mc13892_vdig),
277 	MC13892_DEFINE_REGU(VSD, REGULATORMODE1, REGULATORSETTING1,
278 		mc13892_vsd),
279 	MC13892_DEFINE_REGU(VUSB2, REGULATORMODE0, REGULATORSETTING0,
280 		mc13892_vusb2),
281 	MC13892_DEFINE_REGU(VVIDEO, REGULATORMODE1, REGULATORSETTING1,
282 		mc13892_vvideo),
283 	MC13892_DEFINE_REGU(VAUDIO, REGULATORMODE1, REGULATORSETTING1,
284 		mc13892_vaudio),
285 	MC13892_DEFINE_REGU(VCAM, REGULATORMODE1, REGULATORSETTING0,
286 		mc13892_vcam),
287 	MC13892_DEFINE_REGU(VGEN1, REGULATORMODE0, REGULATORSETTING0,
288 		mc13892_vgen1),
289 	MC13892_DEFINE_REGU(VGEN2, REGULATORMODE0, REGULATORSETTING0,
290 		mc13892_vgen2),
291 	MC13892_DEFINE_REGU(VGEN3, REGULATORMODE1, REGULATORSETTING0,
292 		mc13892_vgen3),
293 	MC13892_FIXED_DEFINE(VUSB, USB1, mc13892_vusb),
294 	MC13892_GPO_DEFINE(GPO1, POWERMISC, mc13892_gpo),
295 	MC13892_GPO_DEFINE(GPO2, POWERMISC, mc13892_gpo),
296 	MC13892_GPO_DEFINE(GPO3, POWERMISC, mc13892_gpo),
297 	MC13892_GPO_DEFINE(GPO4, POWERMISC, mc13892_gpo),
298 	MC13892_GPO_DEFINE(PWGT1SPI, POWERMISC, mc13892_pwgtdrv),
299 	MC13892_GPO_DEFINE(PWGT2SPI, POWERMISC, mc13892_pwgtdrv),
300 };
301 
302 static int mc13892_powermisc_rmw(struct mc13xxx_regulator_priv *priv, u32 mask,
303 				 u32 val)
304 {
305 	struct mc13xxx *mc13892 = priv->mc13xxx;
306 	int ret;
307 	u32 valread;
308 
309 	BUG_ON(val & ~mask);
310 
311 	mc13xxx_lock(priv->mc13xxx);
312 	ret = mc13xxx_reg_read(mc13892, MC13892_POWERMISC, &valread);
313 	if (ret)
314 		goto out;
315 
316 	/* Update the stored state for Power Gates. */
317 	priv->powermisc_pwgt_state =
318 		(priv->powermisc_pwgt_state & ~mask) | val;
319 	priv->powermisc_pwgt_state &= MC13892_POWERMISC_PWGTSPI_M;
320 
321 	/* Construct the new register value */
322 	valread = (valread & ~mask) | val;
323 	/* Overwrite the PWGTxEN with the stored version */
324 	valread = (valread & ~MC13892_POWERMISC_PWGTSPI_M) |
325 		priv->powermisc_pwgt_state;
326 
327 	ret = mc13xxx_reg_write(mc13892, MC13892_POWERMISC, valread);
328 out:
329 	mc13xxx_unlock(priv->mc13xxx);
330 	return ret;
331 }
332 
333 static int mc13892_gpo_regulator_enable(struct regulator_dev *rdev)
334 {
335 	struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev);
336 	int id = rdev_get_id(rdev);
337 	u32 en_val = mc13892_regulators[id].enable_bit;
338 	u32 mask = mc13892_regulators[id].enable_bit;
339 
340 	dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id);
341 
342 	/* Power Gate enable value is 0 */
343 	if (id == MC13892_PWGT1SPI || id == MC13892_PWGT2SPI)
344 		en_val = 0;
345 
346 	if (id == MC13892_GPO4)
347 		mask |= MC13892_POWERMISC_GPO4ADINEN;
348 
349 	return mc13892_powermisc_rmw(priv, mask, en_val);
350 }
351 
352 static int mc13892_gpo_regulator_disable(struct regulator_dev *rdev)
353 {
354 	struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev);
355 	int id = rdev_get_id(rdev);
356 	u32 dis_val = 0;
357 
358 	dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id);
359 
360 	/* Power Gate disable value is 1 */
361 	if (id == MC13892_PWGT1SPI || id == MC13892_PWGT2SPI)
362 		dis_val = mc13892_regulators[id].enable_bit;
363 
364 	return mc13892_powermisc_rmw(priv, mc13892_regulators[id].enable_bit,
365 		dis_val);
366 }
367 
368 static int mc13892_gpo_regulator_is_enabled(struct regulator_dev *rdev)
369 {
370 	struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev);
371 	int ret, id = rdev_get_id(rdev);
372 	unsigned int val;
373 
374 	mc13xxx_lock(priv->mc13xxx);
375 	ret = mc13xxx_reg_read(priv->mc13xxx, mc13892_regulators[id].reg, &val);
376 	mc13xxx_unlock(priv->mc13xxx);
377 
378 	if (ret)
379 		return ret;
380 
381 	/* Power Gates state is stored in powermisc_pwgt_state
382 	 * where the meaning of bits is negated */
383 	val = (val & ~MC13892_POWERMISC_PWGTSPI_M) |
384 		(priv->powermisc_pwgt_state ^ MC13892_POWERMISC_PWGTSPI_M);
385 
386 	return (val & mc13892_regulators[id].enable_bit) != 0;
387 }
388 
389 
390 static struct regulator_ops mc13892_gpo_regulator_ops = {
391 	.enable = mc13892_gpo_regulator_enable,
392 	.disable = mc13892_gpo_regulator_disable,
393 	.is_enabled = mc13892_gpo_regulator_is_enabled,
394 	.list_voltage = regulator_list_voltage_table,
395 	.set_voltage = mc13xxx_fixed_regulator_set_voltage,
396 };
397 
398 static int mc13892_sw_regulator_get_voltage_sel(struct regulator_dev *rdev)
399 {
400 	struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev);
401 	int ret, id = rdev_get_id(rdev);
402 	unsigned int val, selector;
403 
404 	dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id);
405 
406 	mc13xxx_lock(priv->mc13xxx);
407 	ret = mc13xxx_reg_read(priv->mc13xxx,
408 		mc13892_regulators[id].vsel_reg, &val);
409 	mc13xxx_unlock(priv->mc13xxx);
410 	if (ret)
411 		return ret;
412 
413 	/*
414 	 * Figure out if the HI bit is set inside the switcher mode register
415 	 * since this means the selector value we return is at a different
416 	 * offset into the selector table.
417 	 *
418 	 * According to the MC13892 documentation note 59 (Table 47) the SW1
419 	 * buck switcher does not support output range programming therefore
420 	 * the HI bit must always remain 0. So do not do anything strange if
421 	 * our register is MC13892_SWITCHERS0.
422 	 */
423 
424 	selector = val & mc13892_regulators[id].vsel_mask;
425 
426 	if ((mc13892_regulators[id].vsel_reg != MC13892_SWITCHERS0) &&
427 	    (val & MC13892_SWITCHERS0_SWxHI)) {
428 		selector += MC13892_SWxHI_SEL_OFFSET;
429 	}
430 
431 	dev_dbg(rdev_get_dev(rdev), "%s id: %d val: 0x%08x selector: %d\n",
432 			__func__, id, val, selector);
433 
434 	return selector;
435 }
436 
437 static int mc13892_sw_regulator_set_voltage_sel(struct regulator_dev *rdev,
438 						unsigned selector)
439 {
440 	struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev);
441 	int volt, mask, id = rdev_get_id(rdev);
442 	u32 reg_value;
443 	int ret;
444 
445 	volt = rdev->desc->volt_table[selector];
446 	mask = mc13892_regulators[id].vsel_mask;
447 	reg_value = selector;
448 
449 	/*
450 	 * Don't mess with the HI bit or support HI voltage offsets for SW1.
451 	 *
452 	 * Since the get_voltage_sel callback has given a fudged value for
453 	 * the selector offset, we need to back out that offset if HI is
454 	 * to be set so we write the correct value to the register.
455 	 *
456 	 * The HI bit addition and selector offset handling COULD be more
457 	 * complicated by shifting and masking off the voltage selector part
458 	 * of the register then logical OR it back in, but since the selector
459 	 * is at bits 4:0 there is very little point. This makes the whole
460 	 * thing more readable and we do far less work.
461 	 */
462 
463 	if (mc13892_regulators[id].vsel_reg != MC13892_SWITCHERS0) {
464 		mask |= MC13892_SWITCHERS0_SWxHI;
465 
466 		if (volt > 1375000) {
467 			reg_value -= MC13892_SWxHI_SEL_OFFSET;
468 			reg_value |= MC13892_SWITCHERS0_SWxHI;
469 		} else {
470 			reg_value &= ~MC13892_SWITCHERS0_SWxHI;
471 		}
472 	}
473 
474 	mc13xxx_lock(priv->mc13xxx);
475 	ret = mc13xxx_reg_rmw(priv->mc13xxx, mc13892_regulators[id].vsel_reg,
476 			      mask, reg_value);
477 	mc13xxx_unlock(priv->mc13xxx);
478 
479 	return ret;
480 }
481 
482 static struct regulator_ops mc13892_sw_regulator_ops = {
483 	.list_voltage = regulator_list_voltage_table,
484 	.map_voltage = regulator_map_voltage_ascend,
485 	.set_voltage_sel = mc13892_sw_regulator_set_voltage_sel,
486 	.get_voltage_sel = mc13892_sw_regulator_get_voltage_sel,
487 };
488 
489 static int mc13892_vcam_set_mode(struct regulator_dev *rdev, unsigned int mode)
490 {
491 	unsigned int en_val = 0;
492 	struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev);
493 	int ret, id = rdev_get_id(rdev);
494 
495 	if (mode == REGULATOR_MODE_FAST)
496 		en_val = MC13892_REGULATORMODE1_VCAMCONFIGEN;
497 
498 	mc13xxx_lock(priv->mc13xxx);
499 	ret = mc13xxx_reg_rmw(priv->mc13xxx, mc13892_regulators[id].reg,
500 		MC13892_REGULATORMODE1_VCAMCONFIGEN, en_val);
501 	mc13xxx_unlock(priv->mc13xxx);
502 
503 	return ret;
504 }
505 
506 static unsigned int mc13892_vcam_get_mode(struct regulator_dev *rdev)
507 {
508 	struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev);
509 	int ret, id = rdev_get_id(rdev);
510 	unsigned int val;
511 
512 	mc13xxx_lock(priv->mc13xxx);
513 	ret = mc13xxx_reg_read(priv->mc13xxx, mc13892_regulators[id].reg, &val);
514 	mc13xxx_unlock(priv->mc13xxx);
515 
516 	if (ret)
517 		return ret;
518 
519 	if (val & MC13892_REGULATORMODE1_VCAMCONFIGEN)
520 		return REGULATOR_MODE_FAST;
521 
522 	return REGULATOR_MODE_NORMAL;
523 }
524 
525 static struct regulator_ops mc13892_vcam_ops;
526 
527 static int mc13892_regulator_probe(struct platform_device *pdev)
528 {
529 	struct mc13xxx_regulator_priv *priv;
530 	struct mc13xxx *mc13892 = dev_get_drvdata(pdev->dev.parent);
531 	struct mc13xxx_regulator_platform_data *pdata =
532 		dev_get_platdata(&pdev->dev);
533 	struct mc13xxx_regulator_init_data *mc13xxx_data;
534 	struct regulator_config config = { };
535 	int i, ret;
536 	int num_regulators = 0;
537 	u32 val;
538 
539 	num_regulators = mc13xxx_get_num_regulators_dt(pdev);
540 
541 	if (num_regulators <= 0 && pdata)
542 		num_regulators = pdata->num_regulators;
543 	if (num_regulators <= 0)
544 		return -EINVAL;
545 
546 	priv = devm_kzalloc(&pdev->dev,
547 			    struct_size(priv, regulators, num_regulators),
548 			    GFP_KERNEL);
549 	if (!priv)
550 		return -ENOMEM;
551 
552 	priv->num_regulators = num_regulators;
553 	priv->mc13xxx_regulators = mc13892_regulators;
554 	priv->mc13xxx = mc13892;
555 	platform_set_drvdata(pdev, priv);
556 
557 	mc13xxx_lock(mc13892);
558 	ret = mc13xxx_reg_read(mc13892, MC13892_REVISION, &val);
559 	if (ret)
560 		goto err_unlock;
561 
562 	/* enable switch auto mode (on 2.0A silicon only) */
563 	if ((val & 0x0000FFFF) == 0x45d0) {
564 		ret = mc13xxx_reg_rmw(mc13892, MC13892_SWITCHERS4,
565 			MC13892_SWITCHERS4_SW1MODE_M |
566 			MC13892_SWITCHERS4_SW2MODE_M,
567 			MC13892_SWITCHERS4_SW1MODE_AUTO |
568 			MC13892_SWITCHERS4_SW2MODE_AUTO);
569 		if (ret)
570 			goto err_unlock;
571 
572 		ret = mc13xxx_reg_rmw(mc13892, MC13892_SWITCHERS5,
573 			MC13892_SWITCHERS5_SW3MODE_M |
574 			MC13892_SWITCHERS5_SW4MODE_M,
575 			MC13892_SWITCHERS5_SW3MODE_AUTO |
576 			MC13892_SWITCHERS5_SW4MODE_AUTO);
577 		if (ret)
578 			goto err_unlock;
579 	}
580 	mc13xxx_unlock(mc13892);
581 
582 	/* update mc13892_vcam ops */
583 	memcpy(&mc13892_vcam_ops, mc13892_regulators[MC13892_VCAM].desc.ops,
584 						sizeof(struct regulator_ops));
585 	mc13892_vcam_ops.set_mode = mc13892_vcam_set_mode,
586 	mc13892_vcam_ops.get_mode = mc13892_vcam_get_mode,
587 	mc13892_regulators[MC13892_VCAM].desc.ops = &mc13892_vcam_ops;
588 
589 	mc13xxx_data = mc13xxx_parse_regulators_dt(pdev, mc13892_regulators,
590 					ARRAY_SIZE(mc13892_regulators));
591 
592 	for (i = 0; i < priv->num_regulators; i++) {
593 		struct regulator_init_data *init_data;
594 		struct regulator_desc *desc;
595 		struct device_node *node = NULL;
596 		int id;
597 
598 		if (mc13xxx_data) {
599 			id = mc13xxx_data[i].id;
600 			init_data = mc13xxx_data[i].init_data;
601 			node = mc13xxx_data[i].node;
602 		} else {
603 			id = pdata->regulators[i].id;
604 			init_data = pdata->regulators[i].init_data;
605 		}
606 		desc = &mc13892_regulators[id].desc;
607 
608 		config.dev = &pdev->dev;
609 		config.init_data = init_data;
610 		config.driver_data = priv;
611 		config.of_node = node;
612 
613 		priv->regulators[i] = devm_regulator_register(&pdev->dev, desc,
614 							      &config);
615 		if (IS_ERR(priv->regulators[i])) {
616 			dev_err(&pdev->dev, "failed to register regulator %s\n",
617 				mc13892_regulators[i].desc.name);
618 			return PTR_ERR(priv->regulators[i]);
619 		}
620 	}
621 
622 	return 0;
623 
624 err_unlock:
625 	mc13xxx_unlock(mc13892);
626 	return ret;
627 }
628 
629 static struct platform_driver mc13892_regulator_driver = {
630 	.driver	= {
631 		.name	= "mc13892-regulator",
632 	},
633 	.probe	= mc13892_regulator_probe,
634 };
635 
636 static int __init mc13892_regulator_init(void)
637 {
638 	return platform_driver_register(&mc13892_regulator_driver);
639 }
640 subsys_initcall(mc13892_regulator_init);
641 
642 static void __exit mc13892_regulator_exit(void)
643 {
644 	platform_driver_unregister(&mc13892_regulator_driver);
645 }
646 module_exit(mc13892_regulator_exit);
647 
648 MODULE_LICENSE("GPL v2");
649 MODULE_AUTHOR("Yong Shen <yong.shen@linaro.org>");
650 MODULE_DESCRIPTION("Regulator Driver for Freescale MC13892 PMIC");
651 MODULE_ALIAS("platform:mc13892-regulator");
652