1 // SPDX-License-Identifier: GPL-2.0
2 //
3 // Regulator Driver for Freescale MC13783 PMIC
4 //
5 // Copyright 2010 Yong Shen <yong.shen@linaro.org>
6 // Copyright (C) 2008 Sascha Hauer, Pengutronix <s.hauer@pengutronix.de>
7 // Copyright 2009 Alberto Panizzo <maramaopercheseimorto@gmail.com>
8 
9 #include <linux/mfd/mc13783.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 MC13783_REG_SWITCHERS0			24
21 /* Enable does not exist for SW1A */
22 #define MC13783_REG_SWITCHERS0_SW1AEN			0
23 #define MC13783_REG_SWITCHERS0_SW1AVSEL			0
24 #define MC13783_REG_SWITCHERS0_SW1AVSEL_M		(63 << 0)
25 
26 #define MC13783_REG_SWITCHERS1			25
27 /* Enable does not exist for SW1B */
28 #define MC13783_REG_SWITCHERS1_SW1BEN			0
29 #define MC13783_REG_SWITCHERS1_SW1BVSEL			0
30 #define MC13783_REG_SWITCHERS1_SW1BVSEL_M		(63 << 0)
31 
32 #define MC13783_REG_SWITCHERS2			26
33 /* Enable does not exist for SW2A */
34 #define MC13783_REG_SWITCHERS2_SW2AEN			0
35 #define MC13783_REG_SWITCHERS2_SW2AVSEL			0
36 #define MC13783_REG_SWITCHERS2_SW2AVSEL_M		(63 << 0)
37 
38 #define MC13783_REG_SWITCHERS3			27
39 /* Enable does not exist for SW2B */
40 #define MC13783_REG_SWITCHERS3_SW2BEN			0
41 #define MC13783_REG_SWITCHERS3_SW2BVSEL			0
42 #define MC13783_REG_SWITCHERS3_SW2BVSEL_M		(63 << 0)
43 
44 #define MC13783_REG_SWITCHERS5			29
45 #define MC13783_REG_SWITCHERS5_SW3EN			(1 << 20)
46 #define MC13783_REG_SWITCHERS5_SW3VSEL			18
47 #define MC13783_REG_SWITCHERS5_SW3VSEL_M		(3 << 18)
48 
49 #define MC13783_REG_REGULATORSETTING0		30
50 #define MC13783_REG_REGULATORSETTING0_VIOLOVSEL		2
51 #define MC13783_REG_REGULATORSETTING0_VDIGVSEL		4
52 #define MC13783_REG_REGULATORSETTING0_VGENVSEL		6
53 #define MC13783_REG_REGULATORSETTING0_VRFDIGVSEL	9
54 #define MC13783_REG_REGULATORSETTING0_VRFREFVSEL	11
55 #define MC13783_REG_REGULATORSETTING0_VRFCPVSEL		13
56 #define MC13783_REG_REGULATORSETTING0_VSIMVSEL		14
57 #define MC13783_REG_REGULATORSETTING0_VESIMVSEL		15
58 #define MC13783_REG_REGULATORSETTING0_VCAMVSEL		16
59 
60 #define MC13783_REG_REGULATORSETTING0_VIOLOVSEL_M	(3 << 2)
61 #define MC13783_REG_REGULATORSETTING0_VDIGVSEL_M	(3 << 4)
62 #define MC13783_REG_REGULATORSETTING0_VGENVSEL_M	(7 << 6)
63 #define MC13783_REG_REGULATORSETTING0_VRFDIGVSEL_M	(3 << 9)
64 #define MC13783_REG_REGULATORSETTING0_VRFREFVSEL_M	(3 << 11)
65 #define MC13783_REG_REGULATORSETTING0_VRFCPVSEL_M	(1 << 13)
66 #define MC13783_REG_REGULATORSETTING0_VSIMVSEL_M	(1 << 14)
67 #define MC13783_REG_REGULATORSETTING0_VESIMVSEL_M	(1 << 15)
68 #define MC13783_REG_REGULATORSETTING0_VCAMVSEL_M	(7 << 16)
69 
70 #define MC13783_REG_REGULATORSETTING1		31
71 #define MC13783_REG_REGULATORSETTING1_VVIBVSEL		0
72 #define MC13783_REG_REGULATORSETTING1_VRF1VSEL		2
73 #define MC13783_REG_REGULATORSETTING1_VRF2VSEL		4
74 #define MC13783_REG_REGULATORSETTING1_VMMC1VSEL		6
75 #define MC13783_REG_REGULATORSETTING1_VMMC2VSEL		9
76 
77 #define MC13783_REG_REGULATORSETTING1_VVIBVSEL_M	(3 << 0)
78 #define MC13783_REG_REGULATORSETTING1_VRF1VSEL_M	(3 << 2)
79 #define MC13783_REG_REGULATORSETTING1_VRF2VSEL_M	(3 << 4)
80 #define MC13783_REG_REGULATORSETTING1_VMMC1VSEL_M	(7 << 6)
81 #define MC13783_REG_REGULATORSETTING1_VMMC2VSEL_M	(7 << 9)
82 
83 #define MC13783_REG_REGULATORMODE0		32
84 #define MC13783_REG_REGULATORMODE0_VAUDIOEN		(1 << 0)
85 #define MC13783_REG_REGULATORMODE0_VIOHIEN		(1 << 3)
86 #define MC13783_REG_REGULATORMODE0_VIOLOEN		(1 << 6)
87 #define MC13783_REG_REGULATORMODE0_VDIGEN		(1 << 9)
88 #define MC13783_REG_REGULATORMODE0_VGENEN		(1 << 12)
89 #define MC13783_REG_REGULATORMODE0_VRFDIGEN		(1 << 15)
90 #define MC13783_REG_REGULATORMODE0_VRFREFEN		(1 << 18)
91 #define MC13783_REG_REGULATORMODE0_VRFCPEN		(1 << 21)
92 
93 #define MC13783_REG_REGULATORMODE1		33
94 #define MC13783_REG_REGULATORMODE1_VSIMEN		(1 << 0)
95 #define MC13783_REG_REGULATORMODE1_VESIMEN		(1 << 3)
96 #define MC13783_REG_REGULATORMODE1_VCAMEN		(1 << 6)
97 #define MC13783_REG_REGULATORMODE1_VRFBGEN		(1 << 9)
98 #define MC13783_REG_REGULATORMODE1_VVIBEN		(1 << 11)
99 #define MC13783_REG_REGULATORMODE1_VRF1EN		(1 << 12)
100 #define MC13783_REG_REGULATORMODE1_VRF2EN		(1 << 15)
101 #define MC13783_REG_REGULATORMODE1_VMMC1EN		(1 << 18)
102 #define MC13783_REG_REGULATORMODE1_VMMC2EN		(1 << 21)
103 
104 #define MC13783_REG_POWERMISC			34
105 #define MC13783_REG_POWERMISC_GPO1EN			(1 << 6)
106 #define MC13783_REG_POWERMISC_GPO2EN			(1 << 8)
107 #define MC13783_REG_POWERMISC_GPO3EN			(1 << 10)
108 #define MC13783_REG_POWERMISC_GPO4EN			(1 << 12)
109 #define MC13783_REG_POWERMISC_PWGT1SPIEN		(1 << 15)
110 #define MC13783_REG_POWERMISC_PWGT2SPIEN		(1 << 16)
111 
112 #define MC13783_REG_POWERMISC_PWGTSPI_M			(3 << 15)
113 
114 
115 /* Voltage Values */
116 static const int mc13783_sw1x_val[] = {
117 	900000, 925000, 950000, 975000,
118 	1000000, 1025000, 1050000, 1075000,
119 	1100000, 1125000, 1150000, 1175000,
120 	1200000, 1225000, 1250000, 1275000,
121 	1300000, 1325000, 1350000, 1375000,
122 	1400000, 1425000, 1450000, 1475000,
123 	1500000, 1525000, 1550000, 1575000,
124 	1600000, 1625000, 1650000, 1675000,
125 	1700000, 1700000, 1700000, 1700000,
126 	1800000, 1800000, 1800000, 1800000,
127 	1850000, 1850000, 1850000, 1850000,
128 	2000000, 2000000, 2000000, 2000000,
129 	2100000, 2100000, 2100000, 2100000,
130 	2200000, 2200000, 2200000, 2200000,
131 	2200000, 2200000, 2200000, 2200000,
132 	2200000, 2200000, 2200000, 2200000,
133 };
134 
135 static const int mc13783_sw2x_val[] = {
136 	900000, 925000, 950000, 975000,
137 	1000000, 1025000, 1050000, 1075000,
138 	1100000, 1125000, 1150000, 1175000,
139 	1200000, 1225000, 1250000, 1275000,
140 	1300000, 1325000, 1350000, 1375000,
141 	1400000, 1425000, 1450000, 1475000,
142 	1500000, 1525000, 1550000, 1575000,
143 	1600000, 1625000, 1650000, 1675000,
144 	1700000, 1700000, 1700000, 1700000,
145 	1800000, 1800000, 1800000, 1800000,
146 	1900000, 1900000, 1900000, 1900000,
147 	2000000, 2000000, 2000000, 2000000,
148 	2100000, 2100000, 2100000, 2100000,
149 	2200000, 2200000, 2200000, 2200000,
150 	2200000, 2200000, 2200000, 2200000,
151 	2200000, 2200000, 2200000, 2200000,
152 };
153 
154 static const unsigned int mc13783_sw3_val[] = {
155 	5000000, 5000000, 5000000, 5500000,
156 };
157 
158 static const unsigned int mc13783_vaudio_val[] = {
159 	2775000,
160 };
161 
162 static const unsigned int mc13783_viohi_val[] = {
163 	2775000,
164 };
165 
166 static const unsigned int mc13783_violo_val[] = {
167 	1200000, 1300000, 1500000, 1800000,
168 };
169 
170 static const unsigned int mc13783_vdig_val[] = {
171 	1200000, 1300000, 1500000, 1800000,
172 };
173 
174 static const unsigned int mc13783_vgen_val[] = {
175 	1200000, 1300000, 1500000, 1800000,
176 	1100000, 2000000, 2775000, 2400000,
177 };
178 
179 static const unsigned int mc13783_vrfdig_val[] = {
180 	1200000, 1500000, 1800000, 1875000,
181 };
182 
183 static const unsigned int mc13783_vrfref_val[] = {
184 	2475000, 2600000, 2700000, 2775000,
185 };
186 
187 static const unsigned int mc13783_vrfcp_val[] = {
188 	2700000, 2775000,
189 };
190 
191 static const unsigned int mc13783_vsim_val[] = {
192 	1800000, 2900000, 3000000,
193 };
194 
195 static const unsigned int mc13783_vesim_val[] = {
196 	1800000, 2900000,
197 };
198 
199 static const unsigned int mc13783_vcam_val[] = {
200 	1500000, 1800000, 2500000, 2550000,
201 	2600000, 2750000, 2800000, 3000000,
202 };
203 
204 static const unsigned int mc13783_vrfbg_val[] = {
205 	1250000,
206 };
207 
208 static const unsigned int mc13783_vvib_val[] = {
209 	1300000, 1800000, 2000000, 3000000,
210 };
211 
212 static const unsigned int mc13783_vmmc_val[] = {
213 	1600000, 1800000, 2000000, 2600000,
214 	2700000, 2800000, 2900000, 3000000,
215 };
216 
217 static const unsigned int mc13783_vrf_val[] = {
218 	1500000, 1875000, 2700000, 2775000,
219 };
220 
221 static const unsigned int mc13783_gpo_val[] = {
222 	3100000,
223 };
224 
225 static const unsigned int mc13783_pwgtdrv_val[] = {
226 	5500000,
227 };
228 
229 static const struct regulator_ops mc13783_gpo_regulator_ops;
230 
231 #define MC13783_DEFINE(prefix, name, node, reg, vsel_reg, voltages)	\
232 	MC13xxx_DEFINE(MC13783_REG_, name, node, reg, vsel_reg, voltages, \
233 			mc13xxx_regulator_ops)
234 
235 #define MC13783_FIXED_DEFINE(prefix, name, node, reg, voltages)		\
236 	MC13xxx_FIXED_DEFINE(MC13783_REG_, name, node, reg, voltages,	\
237 			mc13xxx_fixed_regulator_ops)
238 
239 #define MC13783_GPO_DEFINE(prefix, name, node, reg, voltages)		\
240 	MC13xxx_GPO_DEFINE(MC13783_REG_, name, node, reg, voltages,	\
241 			mc13783_gpo_regulator_ops)
242 
243 #define MC13783_DEFINE_SW(_name, _node, _reg, _vsel_reg, _voltages)	\
244 	MC13783_DEFINE(REG, _name, _node, _reg, _vsel_reg, _voltages)
245 #define MC13783_DEFINE_REGU(_name, _node, _reg, _vsel_reg, _voltages)	\
246 	MC13783_DEFINE(REG, _name, _node, _reg, _vsel_reg, _voltages)
247 
248 static struct mc13xxx_regulator mc13783_regulators[] = {
249 	MC13783_DEFINE_SW(SW1A, sw1a, SWITCHERS0, SWITCHERS0, mc13783_sw1x_val),
250 	MC13783_DEFINE_SW(SW1B, sw1b, SWITCHERS1, SWITCHERS1, mc13783_sw1x_val),
251 	MC13783_DEFINE_SW(SW2A, sw2a, SWITCHERS2, SWITCHERS2, mc13783_sw2x_val),
252 	MC13783_DEFINE_SW(SW2B, sw2b, SWITCHERS3, SWITCHERS3, mc13783_sw2x_val),
253 	MC13783_DEFINE_SW(SW3, sw3, SWITCHERS5, SWITCHERS5, mc13783_sw3_val),
254 
255 	MC13783_FIXED_DEFINE(REG, VAUDIO, vaudio, REGULATORMODE0, mc13783_vaudio_val),
256 	MC13783_FIXED_DEFINE(REG, VIOHI, viohi, REGULATORMODE0, mc13783_viohi_val),
257 	MC13783_DEFINE_REGU(VIOLO, violo, REGULATORMODE0, REGULATORSETTING0,
258 			    mc13783_violo_val),
259 	MC13783_DEFINE_REGU(VDIG, vdig, REGULATORMODE0, REGULATORSETTING0,
260 			    mc13783_vdig_val),
261 	MC13783_DEFINE_REGU(VGEN, vgen, REGULATORMODE0, REGULATORSETTING0,
262 			    mc13783_vgen_val),
263 	MC13783_DEFINE_REGU(VRFDIG, vrfdig, REGULATORMODE0, REGULATORSETTING0,
264 			    mc13783_vrfdig_val),
265 	MC13783_DEFINE_REGU(VRFREF, vrfref, REGULATORMODE0, REGULATORSETTING0,
266 			    mc13783_vrfref_val),
267 	MC13783_DEFINE_REGU(VRFCP, vrfcp, REGULATORMODE0, REGULATORSETTING0,
268 			    mc13783_vrfcp_val),
269 	MC13783_DEFINE_REGU(VSIM, vsim, REGULATORMODE1, REGULATORSETTING0,
270 			    mc13783_vsim_val),
271 	MC13783_DEFINE_REGU(VESIM, vesim, REGULATORMODE1, REGULATORSETTING0,
272 			    mc13783_vesim_val),
273 	MC13783_DEFINE_REGU(VCAM, vcam, REGULATORMODE1, REGULATORSETTING0,
274 			    mc13783_vcam_val),
275 	MC13783_FIXED_DEFINE(REG, VRFBG, vrfbg, REGULATORMODE1, mc13783_vrfbg_val),
276 	MC13783_DEFINE_REGU(VVIB, vvib, REGULATORMODE1, REGULATORSETTING1,
277 			    mc13783_vvib_val),
278 	MC13783_DEFINE_REGU(VRF1, vrf1, REGULATORMODE1, REGULATORSETTING1,
279 			    mc13783_vrf_val),
280 	MC13783_DEFINE_REGU(VRF2, vrf2, REGULATORMODE1, REGULATORSETTING1,
281 			    mc13783_vrf_val),
282 	MC13783_DEFINE_REGU(VMMC1, vmmc1, REGULATORMODE1, REGULATORSETTING1,
283 			    mc13783_vmmc_val),
284 	MC13783_DEFINE_REGU(VMMC2, vmmc2, REGULATORMODE1, REGULATORSETTING1,
285 			    mc13783_vmmc_val),
286 	MC13783_GPO_DEFINE(REG, GPO1, gpo1, POWERMISC, mc13783_gpo_val),
287 	MC13783_GPO_DEFINE(REG, GPO2, gpo1, POWERMISC, mc13783_gpo_val),
288 	MC13783_GPO_DEFINE(REG, GPO3, gpo1, POWERMISC, mc13783_gpo_val),
289 	MC13783_GPO_DEFINE(REG, GPO4, gpo1, POWERMISC, mc13783_gpo_val),
290 	MC13783_GPO_DEFINE(REG, PWGT1SPI, pwgt1spi, POWERMISC, mc13783_pwgtdrv_val),
291 	MC13783_GPO_DEFINE(REG, PWGT2SPI, pwgt2spi, POWERMISC, mc13783_pwgtdrv_val),
292 };
293 
294 static int mc13783_powermisc_rmw(struct mc13xxx_regulator_priv *priv, u32 mask,
295 		u32 val)
296 {
297 	struct mc13xxx *mc13783 = priv->mc13xxx;
298 	int ret;
299 	u32 valread;
300 
301 	BUG_ON(val & ~mask);
302 
303 	mc13xxx_lock(priv->mc13xxx);
304 	ret = mc13xxx_reg_read(mc13783, MC13783_REG_POWERMISC, &valread);
305 	if (ret)
306 		goto out;
307 
308 	/* Update the stored state for Power Gates. */
309 	priv->powermisc_pwgt_state =
310 				(priv->powermisc_pwgt_state & ~mask) | val;
311 	priv->powermisc_pwgt_state &= MC13783_REG_POWERMISC_PWGTSPI_M;
312 
313 	/* Construct the new register value */
314 	valread = (valread & ~mask) | val;
315 	/* Overwrite the PWGTxEN with the stored version */
316 	valread = (valread & ~MC13783_REG_POWERMISC_PWGTSPI_M) |
317 						priv->powermisc_pwgt_state;
318 
319 	ret = mc13xxx_reg_write(mc13783, MC13783_REG_POWERMISC, valread);
320 out:
321 	mc13xxx_unlock(priv->mc13xxx);
322 	return ret;
323 }
324 
325 static int mc13783_gpo_regulator_enable(struct regulator_dev *rdev)
326 {
327 	struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev);
328 	struct mc13xxx_regulator *mc13xxx_regulators = priv->mc13xxx_regulators;
329 	int id = rdev_get_id(rdev);
330 	u32 en_val = mc13xxx_regulators[id].enable_bit;
331 
332 	dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id);
333 
334 	/* Power Gate enable value is 0 */
335 	if (id == MC13783_REG_PWGT1SPI ||
336 	    id == MC13783_REG_PWGT2SPI)
337 		en_val = 0;
338 
339 	return mc13783_powermisc_rmw(priv, mc13xxx_regulators[id].enable_bit,
340 					en_val);
341 }
342 
343 static int mc13783_gpo_regulator_disable(struct regulator_dev *rdev)
344 {
345 	struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev);
346 	struct mc13xxx_regulator *mc13xxx_regulators = priv->mc13xxx_regulators;
347 	int id = rdev_get_id(rdev);
348 	u32 dis_val = 0;
349 
350 	dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id);
351 
352 	/* Power Gate disable value is 1 */
353 	if (id == MC13783_REG_PWGT1SPI ||
354 	    id == MC13783_REG_PWGT2SPI)
355 		dis_val = mc13xxx_regulators[id].enable_bit;
356 
357 	return mc13783_powermisc_rmw(priv, mc13xxx_regulators[id].enable_bit,
358 					dis_val);
359 }
360 
361 static int mc13783_gpo_regulator_is_enabled(struct regulator_dev *rdev)
362 {
363 	struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev);
364 	struct mc13xxx_regulator *mc13xxx_regulators = priv->mc13xxx_regulators;
365 	int ret, id = rdev_get_id(rdev);
366 	unsigned int val;
367 
368 	mc13xxx_lock(priv->mc13xxx);
369 	ret = mc13xxx_reg_read(priv->mc13xxx, mc13xxx_regulators[id].reg, &val);
370 	mc13xxx_unlock(priv->mc13xxx);
371 
372 	if (ret)
373 		return ret;
374 
375 	/* Power Gates state is stored in powermisc_pwgt_state
376 	 * where the meaning of bits is negated */
377 	val = (val & ~MC13783_REG_POWERMISC_PWGTSPI_M) |
378 	      (priv->powermisc_pwgt_state ^ MC13783_REG_POWERMISC_PWGTSPI_M);
379 
380 	return (val & mc13xxx_regulators[id].enable_bit) != 0;
381 }
382 
383 static const struct regulator_ops mc13783_gpo_regulator_ops = {
384 	.enable = mc13783_gpo_regulator_enable,
385 	.disable = mc13783_gpo_regulator_disable,
386 	.is_enabled = mc13783_gpo_regulator_is_enabled,
387 	.list_voltage = regulator_list_voltage_table,
388 	.set_voltage = mc13xxx_fixed_regulator_set_voltage,
389 };
390 
391 static int mc13783_regulator_probe(struct platform_device *pdev)
392 {
393 	struct mc13xxx_regulator_priv *priv;
394 	struct mc13xxx *mc13783 = dev_get_drvdata(pdev->dev.parent);
395 	struct mc13xxx_regulator_platform_data *pdata =
396 		dev_get_platdata(&pdev->dev);
397 	struct mc13xxx_regulator_init_data *mc13xxx_data;
398 	struct regulator_config config = { };
399 	int i, num_regulators;
400 
401 	num_regulators = mc13xxx_get_num_regulators_dt(pdev);
402 
403 	if (num_regulators <= 0 && pdata)
404 		num_regulators = pdata->num_regulators;
405 	if (num_regulators <= 0)
406 		return -EINVAL;
407 
408 	priv = devm_kzalloc(&pdev->dev,
409 			    struct_size(priv, regulators, num_regulators),
410 			    GFP_KERNEL);
411 	if (!priv)
412 		return -ENOMEM;
413 
414 	priv->num_regulators = num_regulators;
415 	priv->mc13xxx_regulators = mc13783_regulators;
416 	priv->mc13xxx = mc13783;
417 	platform_set_drvdata(pdev, priv);
418 
419 	mc13xxx_data = mc13xxx_parse_regulators_dt(pdev, mc13783_regulators,
420 					ARRAY_SIZE(mc13783_regulators));
421 
422 	for (i = 0; i < priv->num_regulators; i++) {
423 		struct regulator_init_data *init_data;
424 		struct regulator_desc *desc;
425 		struct device_node *node = NULL;
426 		int id;
427 
428 		if (mc13xxx_data) {
429 			id = mc13xxx_data[i].id;
430 			init_data = mc13xxx_data[i].init_data;
431 			node = mc13xxx_data[i].node;
432 		} else {
433 			id = pdata->regulators[i].id;
434 			init_data = pdata->regulators[i].init_data;
435 		}
436 		desc = &mc13783_regulators[id].desc;
437 
438 		config.dev = &pdev->dev;
439 		config.init_data = init_data;
440 		config.driver_data = priv;
441 		config.of_node = node;
442 
443 		priv->regulators[i] = devm_regulator_register(&pdev->dev, desc,
444 							      &config);
445 		if (IS_ERR(priv->regulators[i])) {
446 			dev_err(&pdev->dev, "failed to register regulator %s\n",
447 				mc13783_regulators[i].desc.name);
448 			return PTR_ERR(priv->regulators[i]);
449 		}
450 	}
451 
452 	return 0;
453 }
454 
455 static struct platform_driver mc13783_regulator_driver = {
456 	.driver	= {
457 		.name	= "mc13783-regulator",
458 	},
459 	.probe		= mc13783_regulator_probe,
460 };
461 
462 static int __init mc13783_regulator_init(void)
463 {
464 	return platform_driver_register(&mc13783_regulator_driver);
465 }
466 subsys_initcall(mc13783_regulator_init);
467 
468 static void __exit mc13783_regulator_exit(void)
469 {
470 	platform_driver_unregister(&mc13783_regulator_driver);
471 }
472 module_exit(mc13783_regulator_exit);
473 
474 MODULE_LICENSE("GPL v2");
475 MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de>");
476 MODULE_DESCRIPTION("Regulator Driver for Freescale MC13783 PMIC");
477 MODULE_ALIAS("platform:mc13783-regulator");
478