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
66enum 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
77enum bxtwc_irqs_pwrbtn {
78 BXTWC_PWRBTN_IRQ = 0,
79 BXTWC_UIBTN_IRQ,
80};
81
82enum bxtwc_irqs_bcu {
83 BXTWC_BCU_IRQ = 0,
84};
85
86enum bxtwc_irqs_adc {
87 BXTWC_ADC_IRQ = 0,
88};
89
90enum bxtwc_irqs_chgr {
91 BXTWC_USBC_IRQ = 0,
92 BXTWC_CHGR0_IRQ,
93 BXTWC_CHGR1_IRQ,
94};
95
96enum bxtwc_irqs_tmu {
97 BXTWC_TMU_IRQ = 0,
98};
99
100enum bxtwc_irqs_crit {
101 BXTWC_CRIT_IRQ = 0,
102};
103
104static 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
115static const struct regmap_irq bxtwc_regmap_irqs_pwrbtn[] = {
116 REGMAP_IRQ_REG(BXTWC_PWRBTN_IRQ, 0, BIT(0)),
117};
118
119static const struct regmap_irq bxtwc_regmap_irqs_bcu[] = {
120 REGMAP_IRQ_REG(BXTWC_BCU_IRQ, 0, GENMASK(4, 0)),
121};
122
123static const struct regmap_irq bxtwc_regmap_irqs_adc[] = {
124 REGMAP_IRQ_REG(BXTWC_ADC_IRQ, 0, GENMASK(7, 0)),
125};
126
127static 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
133static const struct regmap_irq bxtwc_regmap_irqs_tmu[] = {
134 REGMAP_IRQ_REG(BXTWC_TMU_IRQ, 0, GENMASK(2, 1)),
135};
136
137static const struct regmap_irq bxtwc_regmap_irqs_crit[] = {
138 REGMAP_IRQ_REG(BXTWC_CRIT_IRQ, 0, GENMASK(1, 0)),
139};
140
141static 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
150static 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
159static 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
168static 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
177static 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
186static 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
195static 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
204static const struct resource gpio_resources[] = {
205 DEFINE_RES_IRQ_NAMED(BXTWC_GPIO_LVL1_IRQ, "GPIO"),
206};
207
208static const struct resource adc_resources[] = {
209 DEFINE_RES_IRQ_NAMED(BXTWC_ADC_IRQ, "ADC"),
210};
211
212static const struct resource usbc_resources[] = {
213 DEFINE_RES_IRQ(BXTWC_USBC_IRQ),
214};
215
216static 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
221static const struct resource thermal_resources[] = {
222 DEFINE_RES_IRQ(BXTWC_THRM_LVL1_IRQ),
223};
224
225static const struct resource bcu_resources[] = {
226 DEFINE_RES_IRQ_NAMED(BXTWC_BCU_IRQ, "BCU"),
227};
228
229static const struct resource tmu_resources[] = {
230 DEFINE_RES_IRQ_NAMED(BXTWC_TMU_IRQ, "TMU"),
231};
232
233static 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
275static 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(scu: pmic->scu, PMC_PMIC_ACCESS,
297 PMC_PMIC_READ, in: ipc_in, inlen: sizeof(ipc_in),
298 out: ipc_out, outlen: sizeof(ipc_out));
299 if (ret)
300 return ret;
301
302 *val = ipc_out[0];
303
304 return 0;
305}
306
307static 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(scu: pmic->scu, PMC_PMIC_ACCESS,
328 PMC_PMIC_WRITE, in: ipc_in, inlen: sizeof(ipc_in),
329 NULL, outlen: 0);
330}
331
332/* sysfs interfaces to r/w PMIC registers, required by initial script */
333static unsigned long bxtwc_reg_addr;
334static ssize_t addr_show(struct device *dev,
335 struct device_attribute *attr, char *buf)
336{
337 return sysfs_emit(buf, fmt: "0x%lx\n", bxtwc_reg_addr);
338}
339
340static 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(s: buf, base: 0, res: &bxtwc_reg_addr);
346 if (ret)
347 return ret;
348
349 return count;
350}
351
352static 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(map: pmic->regmap, reg: bxtwc_reg_addr, val: &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, fmt: "0x%02x\n", val);
366}
367
368static 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(s: buf, base: 0, res: &val);
376 if (ret)
377 return ret;
378
379 ret = regmap_write(map: pmic->regmap, reg: 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
388static DEVICE_ATTR_ADMIN_RW(addr);
389static DEVICE_ATTR_ADMIN_RW(val);
390static struct attribute *bxtwc_attrs[] = {
391 &dev_attr_addr.attr,
392 &dev_attr_val.attr,
393 NULL
394};
395
396static const struct attribute_group bxtwc_group = {
397 .attrs = bxtwc_attrs,
398};
399
400static const struct attribute_group *bxtwc_groups[] = {
401 &bxtwc_group,
402 NULL
403};
404
405static 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
412static 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(data: pdata, irq: pirq);
421 if (irq < 0)
422 return dev_err_probe(dev: pmic->dev, err: irq, fmt: "Failed to get parent vIRQ(%d) for chip %s\n",
423 pirq, chip->name);
424
425 return devm_regmap_add_irq_chip(dev: pmic->dev, map: pmic->regmap, irq, irq_flags,
426 irq_base: 0, chip, data);
427}
428
429static 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), pathname: "_HRV", NULL, data: &hrv);
438 if (ACPI_FAILURE(status))
439 return dev_err_probe(dev, err: -ENODEV, fmt: "Failed to get PMIC hardware revision\n");
440 if (hrv != BROXTON_PMIC_WC_HRV)
441 return dev_err_probe(dev, err: -ENODEV, fmt: "Invalid PMIC hardware revision: %llu\n", hrv);
442
443 pmic = devm_kzalloc(dev, size: 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, data: 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(ptr: pmic->regmap))
461 return dev_err_probe(dev, err: PTR_ERR(ptr: pmic->regmap), fmt: "Failed to initialise regmap\n");
462
463 ret = devm_regmap_add_irq_chip(dev, map: pmic->regmap, irq: pmic->irq,
464 IRQF_ONESHOT | IRQF_SHARED,
465 irq_base: 0, chip: &bxtwc_regmap_irq_chip,
466 data: &pmic->irq_chip_data);
467 if (ret)
468 return dev_err_probe(dev, err: ret, fmt: "Failed to add IRQ chip\n");
469
470 ret = bxtwc_add_chained_irq_chip(pmic, pdata: pmic->irq_chip_data,
471 pirq: BXTWC_PWRBTN_LVL1_IRQ,
472 IRQF_ONESHOT,
473 chip: &bxtwc_regmap_irq_chip_pwrbtn,
474 data: &pmic->irq_chip_data_pwrbtn);
475 if (ret)
476 return dev_err_probe(dev, err: ret, fmt: "Failed to add PWRBTN IRQ chip\n");
477
478 ret = bxtwc_add_chained_irq_chip(pmic, pdata: pmic->irq_chip_data,
479 pirq: BXTWC_TMU_LVL1_IRQ,
480 IRQF_ONESHOT,
481 chip: &bxtwc_regmap_irq_chip_tmu,
482 data: &pmic->irq_chip_data_tmu);
483 if (ret)
484 return dev_err_probe(dev, err: ret, fmt: "Failed to add TMU IRQ chip\n");
485
486 /* Add chained IRQ handler for BCU IRQs */
487 ret = bxtwc_add_chained_irq_chip(pmic, pdata: pmic->irq_chip_data,
488 pirq: BXTWC_BCU_LVL1_IRQ,
489 IRQF_ONESHOT,
490 chip: &bxtwc_regmap_irq_chip_bcu,
491 data: &pmic->irq_chip_data_bcu);
492 if (ret)
493 return dev_err_probe(dev, err: ret, fmt: "Failed to add BUC IRQ chip\n");
494
495 /* Add chained IRQ handler for ADC IRQs */
496 ret = bxtwc_add_chained_irq_chip(pmic, pdata: pmic->irq_chip_data,
497 pirq: BXTWC_ADC_LVL1_IRQ,
498 IRQF_ONESHOT,
499 chip: &bxtwc_regmap_irq_chip_adc,
500 data: &pmic->irq_chip_data_adc);
501 if (ret)
502 return dev_err_probe(dev, err: ret, fmt: "Failed to add ADC IRQ chip\n");
503
504 /* Add chained IRQ handler for CHGR IRQs */
505 ret = bxtwc_add_chained_irq_chip(pmic, pdata: pmic->irq_chip_data,
506 pirq: BXTWC_CHGR_LVL1_IRQ,
507 IRQF_ONESHOT,
508 chip: &bxtwc_regmap_irq_chip_chgr,
509 data: &pmic->irq_chip_data_chgr);
510 if (ret)
511 return dev_err_probe(dev, err: ret, fmt: "Failed to add CHGR IRQ chip\n");
512
513 /* Add chained IRQ handler for CRIT IRQs */
514 ret = bxtwc_add_chained_irq_chip(pmic, pdata: pmic->irq_chip_data,
515 pirq: BXTWC_CRIT_LVL1_IRQ,
516 IRQF_ONESHOT,
517 chip: &bxtwc_regmap_irq_chip_crit,
518 data: &pmic->irq_chip_data_crit);
519 if (ret)
520 return dev_err_probe(dev, err: ret, fmt: "Failed to add CRIT IRQ chip\n");
521
522 ret = devm_mfd_add_devices(dev, PLATFORM_DEVID_NONE, cells: bxt_wc_dev, ARRAY_SIZE(bxt_wc_dev),
523 NULL, irq_base: 0, NULL);
524 if (ret)
525 return dev_err_probe(dev, err: ret, fmt: "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(map: pmic->regmap, BXTWC_MIRQLVL1, BXTWC_MIRQLVL1_MCHGR, val: 0);
535
536 return 0;
537}
538
539static void bxtwc_shutdown(struct platform_device *pdev)
540{
541 struct intel_soc_pmic *pmic = platform_get_drvdata(pdev);
542
543 disable_irq(irq: pmic->irq);
544}
545
546static int bxtwc_suspend(struct device *dev)
547{
548 struct intel_soc_pmic *pmic = dev_get_drvdata(dev);
549
550 disable_irq(irq: pmic->irq);
551
552 return 0;
553}
554
555static int bxtwc_resume(struct device *dev)
556{
557 struct intel_soc_pmic *pmic = dev_get_drvdata(dev);
558
559 enable_irq(irq: pmic->irq);
560 return 0;
561}
562
563static DEFINE_SIMPLE_DEV_PM_OPS(bxtwc_pm_ops, bxtwc_suspend, bxtwc_resume);
564
565static const struct acpi_device_id bxtwc_acpi_ids[] = {
566 { "INT34D3", },
567 { }
568};
569MODULE_DEVICE_TABLE(acpi, bxtwc_acpi_ids);
570
571static 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
582module_platform_driver(bxtwc_driver);
583
584MODULE_LICENSE("GPL v2");
585MODULE_AUTHOR("Qipeng Zha <qipeng.zha@intel.com>");
586

source code of linux/drivers/mfd/intel_soc_pmic_bxtwc.c