1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * MFD core driver for Intel Broxton Whiskey Cove PMIC
4  *
5  * Copyright (C) 2015-2017, 2022 Intel Corporation. All rights reserved.
6  */
7 
8 #include <linux/acpi.h>
9 #include <linux/bits.h>
10 #include <linux/delay.h>
11 #include <linux/err.h>
12 #include <linux/interrupt.h>
13 #include <linux/kernel.h>
14 #include <linux/mfd/core.h>
15 #include <linux/mfd/intel_soc_pmic.h>
16 #include <linux/mfd/intel_soc_pmic_bxtwc.h>
17 #include <linux/module.h>
18 
19 #include <asm/intel_scu_ipc.h>
20 
21 /* PMIC device registers */
22 #define REG_ADDR_MASK		GENMASK(15, 8)
23 #define REG_ADDR_SHIFT		8
24 #define REG_OFFSET_MASK		GENMASK(7, 0)
25 
26 /* Interrupt Status Registers */
27 #define BXTWC_IRQLVL1		0x4E02
28 
29 #define BXTWC_PWRBTNIRQ		0x4E03
30 #define BXTWC_THRM0IRQ		0x4E04
31 #define BXTWC_THRM1IRQ		0x4E05
32 #define BXTWC_THRM2IRQ		0x4E06
33 #define BXTWC_BCUIRQ		0x4E07
34 #define BXTWC_ADCIRQ		0x4E08
35 #define BXTWC_CHGR0IRQ		0x4E09
36 #define BXTWC_CHGR1IRQ		0x4E0A
37 #define BXTWC_GPIOIRQ0		0x4E0B
38 #define BXTWC_GPIOIRQ1		0x4E0C
39 #define BXTWC_CRITIRQ		0x4E0D
40 #define BXTWC_TMUIRQ		0x4FB6
41 
42 /* Interrupt MASK Registers */
43 #define BXTWC_MIRQLVL1		0x4E0E
44 #define BXTWC_MIRQLVL1_MCHGR	BIT(5)
45 
46 #define BXTWC_MPWRBTNIRQ	0x4E0F
47 #define BXTWC_MTHRM0IRQ		0x4E12
48 #define BXTWC_MTHRM1IRQ		0x4E13
49 #define BXTWC_MTHRM2IRQ		0x4E14
50 #define BXTWC_MBCUIRQ		0x4E15
51 #define BXTWC_MADCIRQ		0x4E16
52 #define BXTWC_MCHGR0IRQ		0x4E17
53 #define BXTWC_MCHGR1IRQ		0x4E18
54 #define BXTWC_MGPIO0IRQ		0x4E19
55 #define BXTWC_MGPIO1IRQ		0x4E1A
56 #define BXTWC_MCRITIRQ		0x4E1B
57 #define BXTWC_MTMUIRQ		0x4FB7
58 
59 /* Whiskey Cove PMIC share same ACPI ID between different platforms */
60 #define BROXTON_PMIC_WC_HRV	4
61 
62 #define PMC_PMIC_ACCESS		0xFF
63 #define PMC_PMIC_READ		0x0
64 #define PMC_PMIC_WRITE		0x1
65 
66 enum bxtwc_irqs {
67 	BXTWC_PWRBTN_LVL1_IRQ = 0,
68 	BXTWC_TMU_LVL1_IRQ,
69 	BXTWC_THRM_LVL1_IRQ,
70 	BXTWC_BCU_LVL1_IRQ,
71 	BXTWC_ADC_LVL1_IRQ,
72 	BXTWC_CHGR_LVL1_IRQ,
73 	BXTWC_GPIO_LVL1_IRQ,
74 	BXTWC_CRIT_LVL1_IRQ,
75 };
76 
77 enum bxtwc_irqs_pwrbtn {
78 	BXTWC_PWRBTN_IRQ = 0,
79 	BXTWC_UIBTN_IRQ,
80 };
81 
82 enum bxtwc_irqs_bcu {
83 	BXTWC_BCU_IRQ = 0,
84 };
85 
86 enum bxtwc_irqs_adc {
87 	BXTWC_ADC_IRQ = 0,
88 };
89 
90 enum bxtwc_irqs_chgr {
91 	BXTWC_USBC_IRQ = 0,
92 	BXTWC_CHGR0_IRQ,
93 	BXTWC_CHGR1_IRQ,
94 };
95 
96 enum bxtwc_irqs_tmu {
97 	BXTWC_TMU_IRQ = 0,
98 };
99 
100 enum bxtwc_irqs_crit {
101 	BXTWC_CRIT_IRQ = 0,
102 };
103 
104 static const struct regmap_irq bxtwc_regmap_irqs[] = {
105 	REGMAP_IRQ_REG(BXTWC_PWRBTN_LVL1_IRQ, 0, BIT(0)),
106 	REGMAP_IRQ_REG(BXTWC_TMU_LVL1_IRQ, 0, BIT(1)),
107 	REGMAP_IRQ_REG(BXTWC_THRM_LVL1_IRQ, 0, BIT(2)),
108 	REGMAP_IRQ_REG(BXTWC_BCU_LVL1_IRQ, 0, BIT(3)),
109 	REGMAP_IRQ_REG(BXTWC_ADC_LVL1_IRQ, 0, BIT(4)),
110 	REGMAP_IRQ_REG(BXTWC_CHGR_LVL1_IRQ, 0, BIT(5)),
111 	REGMAP_IRQ_REG(BXTWC_GPIO_LVL1_IRQ, 0, BIT(6)),
112 	REGMAP_IRQ_REG(BXTWC_CRIT_LVL1_IRQ, 0, BIT(7)),
113 };
114 
115 static const struct regmap_irq bxtwc_regmap_irqs_pwrbtn[] = {
116 	REGMAP_IRQ_REG(BXTWC_PWRBTN_IRQ, 0, BIT(0)),
117 };
118 
119 static const struct regmap_irq bxtwc_regmap_irqs_bcu[] = {
120 	REGMAP_IRQ_REG(BXTWC_BCU_IRQ, 0, GENMASK(4, 0)),
121 };
122 
123 static const struct regmap_irq bxtwc_regmap_irqs_adc[] = {
124 	REGMAP_IRQ_REG(BXTWC_ADC_IRQ, 0, GENMASK(7, 0)),
125 };
126 
127 static const struct regmap_irq bxtwc_regmap_irqs_chgr[] = {
128 	REGMAP_IRQ_REG(BXTWC_USBC_IRQ, 0, BIT(5)),
129 	REGMAP_IRQ_REG(BXTWC_CHGR0_IRQ, 0, GENMASK(4, 0)),
130 	REGMAP_IRQ_REG(BXTWC_CHGR1_IRQ, 1, GENMASK(4, 0)),
131 };
132 
133 static const struct regmap_irq bxtwc_regmap_irqs_tmu[] = {
134 	REGMAP_IRQ_REG(BXTWC_TMU_IRQ, 0, GENMASK(2, 1)),
135 };
136 
137 static const struct regmap_irq bxtwc_regmap_irqs_crit[] = {
138 	REGMAP_IRQ_REG(BXTWC_CRIT_IRQ, 0, GENMASK(1, 0)),
139 };
140 
141 static struct regmap_irq_chip bxtwc_regmap_irq_chip = {
142 	.name = "bxtwc_irq_chip",
143 	.status_base = BXTWC_IRQLVL1,
144 	.mask_base = BXTWC_MIRQLVL1,
145 	.irqs = bxtwc_regmap_irqs,
146 	.num_irqs = ARRAY_SIZE(bxtwc_regmap_irqs),
147 	.num_regs = 1,
148 };
149 
150 static struct regmap_irq_chip bxtwc_regmap_irq_chip_pwrbtn = {
151 	.name = "bxtwc_irq_chip_pwrbtn",
152 	.status_base = BXTWC_PWRBTNIRQ,
153 	.mask_base = BXTWC_MPWRBTNIRQ,
154 	.irqs = bxtwc_regmap_irqs_pwrbtn,
155 	.num_irqs = ARRAY_SIZE(bxtwc_regmap_irqs_pwrbtn),
156 	.num_regs = 1,
157 };
158 
159 static struct regmap_irq_chip bxtwc_regmap_irq_chip_tmu = {
160 	.name = "bxtwc_irq_chip_tmu",
161 	.status_base = BXTWC_TMUIRQ,
162 	.mask_base = BXTWC_MTMUIRQ,
163 	.irqs = bxtwc_regmap_irqs_tmu,
164 	.num_irqs = ARRAY_SIZE(bxtwc_regmap_irqs_tmu),
165 	.num_regs = 1,
166 };
167 
168 static struct regmap_irq_chip bxtwc_regmap_irq_chip_bcu = {
169 	.name = "bxtwc_irq_chip_bcu",
170 	.status_base = BXTWC_BCUIRQ,
171 	.mask_base = BXTWC_MBCUIRQ,
172 	.irqs = bxtwc_regmap_irqs_bcu,
173 	.num_irqs = ARRAY_SIZE(bxtwc_regmap_irqs_bcu),
174 	.num_regs = 1,
175 };
176 
177 static struct regmap_irq_chip bxtwc_regmap_irq_chip_adc = {
178 	.name = "bxtwc_irq_chip_adc",
179 	.status_base = BXTWC_ADCIRQ,
180 	.mask_base = BXTWC_MADCIRQ,
181 	.irqs = bxtwc_regmap_irqs_adc,
182 	.num_irqs = ARRAY_SIZE(bxtwc_regmap_irqs_adc),
183 	.num_regs = 1,
184 };
185 
186 static struct regmap_irq_chip bxtwc_regmap_irq_chip_chgr = {
187 	.name = "bxtwc_irq_chip_chgr",
188 	.status_base = BXTWC_CHGR0IRQ,
189 	.mask_base = BXTWC_MCHGR0IRQ,
190 	.irqs = bxtwc_regmap_irqs_chgr,
191 	.num_irqs = ARRAY_SIZE(bxtwc_regmap_irqs_chgr),
192 	.num_regs = 2,
193 };
194 
195 static struct regmap_irq_chip bxtwc_regmap_irq_chip_crit = {
196 	.name = "bxtwc_irq_chip_crit",
197 	.status_base = BXTWC_CRITIRQ,
198 	.mask_base = BXTWC_MCRITIRQ,
199 	.irqs = bxtwc_regmap_irqs_crit,
200 	.num_irqs = ARRAY_SIZE(bxtwc_regmap_irqs_crit),
201 	.num_regs = 1,
202 };
203 
204 static const struct resource gpio_resources[] = {
205 	DEFINE_RES_IRQ_NAMED(BXTWC_GPIO_LVL1_IRQ, "GPIO"),
206 };
207 
208 static const struct resource adc_resources[] = {
209 	DEFINE_RES_IRQ_NAMED(BXTWC_ADC_IRQ, "ADC"),
210 };
211 
212 static const struct resource usbc_resources[] = {
213 	DEFINE_RES_IRQ(BXTWC_USBC_IRQ),
214 };
215 
216 static const struct resource charger_resources[] = {
217 	DEFINE_RES_IRQ_NAMED(BXTWC_CHGR0_IRQ, "CHARGER"),
218 	DEFINE_RES_IRQ_NAMED(BXTWC_CHGR1_IRQ, "CHARGER1"),
219 };
220 
221 static const struct resource thermal_resources[] = {
222 	DEFINE_RES_IRQ(BXTWC_THRM_LVL1_IRQ),
223 };
224 
225 static const struct resource bcu_resources[] = {
226 	DEFINE_RES_IRQ_NAMED(BXTWC_BCU_IRQ, "BCU"),
227 };
228 
229 static const struct resource tmu_resources[] = {
230 	DEFINE_RES_IRQ_NAMED(BXTWC_TMU_IRQ, "TMU"),
231 };
232 
233 static struct mfd_cell bxt_wc_dev[] = {
234 	{
235 		.name = "bxt_wcove_gpadc",
236 		.num_resources = ARRAY_SIZE(adc_resources),
237 		.resources = adc_resources,
238 	},
239 	{
240 		.name = "bxt_wcove_thermal",
241 		.num_resources = ARRAY_SIZE(thermal_resources),
242 		.resources = thermal_resources,
243 	},
244 	{
245 		.name = "bxt_wcove_usbc",
246 		.num_resources = ARRAY_SIZE(usbc_resources),
247 		.resources = usbc_resources,
248 	},
249 	{
250 		.name = "bxt_wcove_ext_charger",
251 		.num_resources = ARRAY_SIZE(charger_resources),
252 		.resources = charger_resources,
253 	},
254 	{
255 		.name = "bxt_wcove_bcu",
256 		.num_resources = ARRAY_SIZE(bcu_resources),
257 		.resources = bcu_resources,
258 	},
259 	{
260 		.name = "bxt_wcove_tmu",
261 		.num_resources = ARRAY_SIZE(tmu_resources),
262 		.resources = tmu_resources,
263 	},
264 
265 	{
266 		.name = "bxt_wcove_gpio",
267 		.num_resources = ARRAY_SIZE(gpio_resources),
268 		.resources = gpio_resources,
269 	},
270 	{
271 		.name = "bxt_wcove_region",
272 	},
273 };
274 
275 static int regmap_ipc_byte_reg_read(void *context, unsigned int reg,
276 				    unsigned int *val)
277 {
278 	int ret;
279 	int i2c_addr;
280 	u8 ipc_in[2];
281 	u8 ipc_out[4];
282 	struct intel_soc_pmic *pmic = context;
283 
284 	if (!pmic)
285 		return -EINVAL;
286 
287 	if (reg & REG_ADDR_MASK)
288 		i2c_addr = (reg & REG_ADDR_MASK) >> REG_ADDR_SHIFT;
289 	else
290 		i2c_addr = BXTWC_DEVICE1_ADDR;
291 
292 	reg &= REG_OFFSET_MASK;
293 
294 	ipc_in[0] = reg;
295 	ipc_in[1] = i2c_addr;
296 	ret = intel_scu_ipc_dev_command(pmic->scu, PMC_PMIC_ACCESS,
297 					PMC_PMIC_READ, ipc_in, sizeof(ipc_in),
298 					ipc_out, sizeof(ipc_out));
299 	if (ret)
300 		return ret;
301 
302 	*val = ipc_out[0];
303 
304 	return 0;
305 }
306 
307 static int regmap_ipc_byte_reg_write(void *context, unsigned int reg,
308 				       unsigned int val)
309 {
310 	int i2c_addr;
311 	u8 ipc_in[3];
312 	struct intel_soc_pmic *pmic = context;
313 
314 	if (!pmic)
315 		return -EINVAL;
316 
317 	if (reg & REG_ADDR_MASK)
318 		i2c_addr = (reg & REG_ADDR_MASK) >> REG_ADDR_SHIFT;
319 	else
320 		i2c_addr = BXTWC_DEVICE1_ADDR;
321 
322 	reg &= REG_OFFSET_MASK;
323 
324 	ipc_in[0] = reg;
325 	ipc_in[1] = i2c_addr;
326 	ipc_in[2] = val;
327 	return intel_scu_ipc_dev_command(pmic->scu, PMC_PMIC_ACCESS,
328 					 PMC_PMIC_WRITE, ipc_in, sizeof(ipc_in),
329 					 NULL, 0);
330 }
331 
332 /* sysfs interfaces to r/w PMIC registers, required by initial script */
333 static unsigned long bxtwc_reg_addr;
334 static ssize_t addr_show(struct device *dev,
335 			 struct device_attribute *attr, char *buf)
336 {
337 	return sysfs_emit(buf, "0x%lx\n", bxtwc_reg_addr);
338 }
339 
340 static ssize_t addr_store(struct device *dev,
341 			  struct device_attribute *attr, const char *buf, size_t count)
342 {
343 	int ret;
344 
345 	ret = kstrtoul(buf, 0, &bxtwc_reg_addr);
346 	if (ret)
347 		return ret;
348 
349 	return count;
350 }
351 
352 static ssize_t val_show(struct device *dev,
353 			struct device_attribute *attr, char *buf)
354 {
355 	int ret;
356 	unsigned int val;
357 	struct intel_soc_pmic *pmic = dev_get_drvdata(dev);
358 
359 	ret = regmap_read(pmic->regmap, bxtwc_reg_addr, &val);
360 	if (ret) {
361 		dev_err(dev, "Failed to read 0x%lx\n", bxtwc_reg_addr);
362 		return ret;
363 	}
364 
365 	return sysfs_emit(buf, "0x%02x\n", val);
366 }
367 
368 static ssize_t val_store(struct device *dev,
369 			 struct device_attribute *attr, const char *buf, size_t count)
370 {
371 	int ret;
372 	unsigned int val;
373 	struct intel_soc_pmic *pmic = dev_get_drvdata(dev);
374 
375 	ret = kstrtouint(buf, 0, &val);
376 	if (ret)
377 		return ret;
378 
379 	ret = regmap_write(pmic->regmap, bxtwc_reg_addr, val);
380 	if (ret) {
381 		dev_err(dev, "Failed to write value 0x%02x to address 0x%lx",
382 			val, bxtwc_reg_addr);
383 		return ret;
384 	}
385 	return count;
386 }
387 
388 static DEVICE_ATTR_ADMIN_RW(addr);
389 static DEVICE_ATTR_ADMIN_RW(val);
390 static struct attribute *bxtwc_attrs[] = {
391 	&dev_attr_addr.attr,
392 	&dev_attr_val.attr,
393 	NULL
394 };
395 
396 static const struct attribute_group bxtwc_group = {
397 	.attrs = bxtwc_attrs,
398 };
399 
400 static const struct attribute_group *bxtwc_groups[] = {
401 	&bxtwc_group,
402 	NULL
403 };
404 
405 static const struct regmap_config bxtwc_regmap_config = {
406 	.reg_bits = 16,
407 	.val_bits = 8,
408 	.reg_write = regmap_ipc_byte_reg_write,
409 	.reg_read = regmap_ipc_byte_reg_read,
410 };
411 
412 static int bxtwc_add_chained_irq_chip(struct intel_soc_pmic *pmic,
413 				struct regmap_irq_chip_data *pdata,
414 				int pirq, int irq_flags,
415 				const struct regmap_irq_chip *chip,
416 				struct regmap_irq_chip_data **data)
417 {
418 	int irq;
419 
420 	irq = regmap_irq_get_virq(pdata, pirq);
421 	if (irq < 0)
422 		return dev_err_probe(pmic->dev, irq, "Failed to get parent vIRQ(%d) for chip %s\n",
423 				     pirq, chip->name);
424 
425 	return devm_regmap_add_irq_chip(pmic->dev, pmic->regmap, irq, irq_flags,
426 					0, chip, data);
427 }
428 
429 static int bxtwc_probe(struct platform_device *pdev)
430 {
431 	struct device *dev = &pdev->dev;
432 	int ret;
433 	acpi_status status;
434 	unsigned long long hrv;
435 	struct intel_soc_pmic *pmic;
436 
437 	status = acpi_evaluate_integer(ACPI_HANDLE(dev), "_HRV", NULL, &hrv);
438 	if (ACPI_FAILURE(status))
439 		return dev_err_probe(dev, -ENODEV, "Failed to get PMIC hardware revision\n");
440 	if (hrv != BROXTON_PMIC_WC_HRV)
441 		return dev_err_probe(dev, -ENODEV, "Invalid PMIC hardware revision: %llu\n", hrv);
442 
443 	pmic = devm_kzalloc(dev, sizeof(*pmic), GFP_KERNEL);
444 	if (!pmic)
445 		return -ENOMEM;
446 
447 	ret = platform_get_irq(pdev, 0);
448 	if (ret < 0)
449 		return ret;
450 	pmic->irq = ret;
451 
452 	platform_set_drvdata(pdev, pmic);
453 	pmic->dev = dev;
454 
455 	pmic->scu = devm_intel_scu_ipc_dev_get(dev);
456 	if (!pmic->scu)
457 		return -EPROBE_DEFER;
458 
459 	pmic->regmap = devm_regmap_init(dev, NULL, pmic, &bxtwc_regmap_config);
460 	if (IS_ERR(pmic->regmap))
461 		return dev_err_probe(dev, PTR_ERR(pmic->regmap), "Failed to initialise regmap\n");
462 
463 	ret = devm_regmap_add_irq_chip(dev, pmic->regmap, pmic->irq,
464 				       IRQF_ONESHOT | IRQF_SHARED,
465 				       0, &bxtwc_regmap_irq_chip,
466 				       &pmic->irq_chip_data);
467 	if (ret)
468 		return dev_err_probe(dev, ret, "Failed to add IRQ chip\n");
469 
470 	ret = bxtwc_add_chained_irq_chip(pmic, pmic->irq_chip_data,
471 					 BXTWC_PWRBTN_LVL1_IRQ,
472 					 IRQF_ONESHOT,
473 					 &bxtwc_regmap_irq_chip_pwrbtn,
474 					 &pmic->irq_chip_data_pwrbtn);
475 	if (ret)
476 		return dev_err_probe(dev, ret, "Failed to add PWRBTN IRQ chip\n");
477 
478 	ret = bxtwc_add_chained_irq_chip(pmic, pmic->irq_chip_data,
479 					 BXTWC_TMU_LVL1_IRQ,
480 					 IRQF_ONESHOT,
481 					 &bxtwc_regmap_irq_chip_tmu,
482 					 &pmic->irq_chip_data_tmu);
483 	if (ret)
484 		return dev_err_probe(dev, ret, "Failed to add TMU IRQ chip\n");
485 
486 	/* Add chained IRQ handler for BCU IRQs */
487 	ret = bxtwc_add_chained_irq_chip(pmic, pmic->irq_chip_data,
488 					 BXTWC_BCU_LVL1_IRQ,
489 					 IRQF_ONESHOT,
490 					 &bxtwc_regmap_irq_chip_bcu,
491 					 &pmic->irq_chip_data_bcu);
492 	if (ret)
493 		return dev_err_probe(dev, ret, "Failed to add BUC IRQ chip\n");
494 
495 	/* Add chained IRQ handler for ADC IRQs */
496 	ret = bxtwc_add_chained_irq_chip(pmic, pmic->irq_chip_data,
497 					 BXTWC_ADC_LVL1_IRQ,
498 					 IRQF_ONESHOT,
499 					 &bxtwc_regmap_irq_chip_adc,
500 					 &pmic->irq_chip_data_adc);
501 	if (ret)
502 		return dev_err_probe(dev, ret, "Failed to add ADC IRQ chip\n");
503 
504 	/* Add chained IRQ handler for CHGR IRQs */
505 	ret = bxtwc_add_chained_irq_chip(pmic, pmic->irq_chip_data,
506 					 BXTWC_CHGR_LVL1_IRQ,
507 					 IRQF_ONESHOT,
508 					 &bxtwc_regmap_irq_chip_chgr,
509 					 &pmic->irq_chip_data_chgr);
510 	if (ret)
511 		return dev_err_probe(dev, ret, "Failed to add CHGR IRQ chip\n");
512 
513 	/* Add chained IRQ handler for CRIT IRQs */
514 	ret = bxtwc_add_chained_irq_chip(pmic, pmic->irq_chip_data,
515 					 BXTWC_CRIT_LVL1_IRQ,
516 					 IRQF_ONESHOT,
517 					 &bxtwc_regmap_irq_chip_crit,
518 					 &pmic->irq_chip_data_crit);
519 	if (ret)
520 		return dev_err_probe(dev, ret, "Failed to add CRIT IRQ chip\n");
521 
522 	ret = devm_mfd_add_devices(dev, PLATFORM_DEVID_NONE, bxt_wc_dev, ARRAY_SIZE(bxt_wc_dev),
523 				   NULL, 0, NULL);
524 	if (ret)
525 		return dev_err_probe(dev, ret, "Failed to add devices\n");
526 
527 	/*
528 	 * There is a known H/W bug. Upon reset, BIT 5 of register
529 	 * BXTWC_CHGR_LVL1_IRQ is 0 which is the expected value. However,
530 	 * later it's set to 1(masked) automatically by hardware. So we
531 	 * place the software workaround here to unmask it again in order
532 	 * to re-enable the charger interrupt.
533 	 */
534 	regmap_update_bits(pmic->regmap, BXTWC_MIRQLVL1, BXTWC_MIRQLVL1_MCHGR, 0);
535 
536 	return 0;
537 }
538 
539 static void bxtwc_shutdown(struct platform_device *pdev)
540 {
541 	struct intel_soc_pmic *pmic = platform_get_drvdata(pdev);
542 
543 	disable_irq(pmic->irq);
544 }
545 
546 static int bxtwc_suspend(struct device *dev)
547 {
548 	struct intel_soc_pmic *pmic = dev_get_drvdata(dev);
549 
550 	disable_irq(pmic->irq);
551 
552 	return 0;
553 }
554 
555 static int bxtwc_resume(struct device *dev)
556 {
557 	struct intel_soc_pmic *pmic = dev_get_drvdata(dev);
558 
559 	enable_irq(pmic->irq);
560 	return 0;
561 }
562 
563 static DEFINE_SIMPLE_DEV_PM_OPS(bxtwc_pm_ops, bxtwc_suspend, bxtwc_resume);
564 
565 static const struct acpi_device_id bxtwc_acpi_ids[] = {
566 	{ "INT34D3", },
567 	{ }
568 };
569 MODULE_DEVICE_TABLE(acpi, bxtwc_acpi_ids);
570 
571 static struct platform_driver bxtwc_driver = {
572 	.probe = bxtwc_probe,
573 	.shutdown = bxtwc_shutdown,
574 	.driver	= {
575 		.name	= "BXTWC PMIC",
576 		.pm     = pm_sleep_ptr(&bxtwc_pm_ops),
577 		.acpi_match_table = bxtwc_acpi_ids,
578 		.dev_groups = bxtwc_groups,
579 	},
580 };
581 
582 module_platform_driver(bxtwc_driver);
583 
584 MODULE_LICENSE("GPL v2");
585 MODULE_AUTHOR("Qipeng Zha <qipeng.zha@intel.com>");
586