]>
Commit | Line | Data |
---|---|---|
9e501086 MB |
1 | /* |
2 | * wm8994-core.c -- Device access for Wolfson WM8994 | |
3 | * | |
4 | * Copyright 2009 Wolfson Microelectronics PLC. | |
5 | * | |
6 | * Author: Mark Brown <broonie@opensource.wolfsonmicro.com> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify it | |
9 | * under the terms of the GNU General Public License as published by the | |
10 | * Free Software Foundation; either version 2 of the License, or (at your | |
11 | * option) any later version. | |
12 | * | |
13 | */ | |
14 | ||
15 | #include <linux/kernel.h> | |
16 | #include <linux/module.h> | |
5a0e3ad6 | 17 | #include <linux/slab.h> |
9e501086 MB |
18 | #include <linux/i2c.h> |
19 | #include <linux/delay.h> | |
20 | #include <linux/mfd/core.h> | |
21 | #include <linux/regulator/consumer.h> | |
22 | #include <linux/regulator/machine.h> | |
23 | ||
24 | #include <linux/mfd/wm8994/core.h> | |
25 | #include <linux/mfd/wm8994/pdata.h> | |
26 | #include <linux/mfd/wm8994/registers.h> | |
27 | ||
28 | static int wm8994_read(struct wm8994 *wm8994, unsigned short reg, | |
29 | int bytes, void *dest) | |
30 | { | |
31 | int ret, i; | |
32 | u16 *buf = dest; | |
33 | ||
34 | BUG_ON(bytes % 2); | |
35 | BUG_ON(bytes <= 0); | |
36 | ||
37 | ret = wm8994->read_dev(wm8994, reg, bytes, dest); | |
38 | if (ret < 0) | |
39 | return ret; | |
40 | ||
41 | for (i = 0; i < bytes / 2; i++) { | |
42 | buf[i] = be16_to_cpu(buf[i]); | |
43 | ||
44 | dev_vdbg(wm8994->dev, "Read %04x from R%d(0x%x)\n", | |
45 | buf[i], reg + i, reg + i); | |
46 | } | |
47 | ||
48 | return 0; | |
49 | } | |
50 | ||
51 | /** | |
52 | * wm8994_reg_read: Read a single WM8994 register. | |
53 | * | |
54 | * @wm8994: Device to read from. | |
55 | * @reg: Register to read. | |
56 | */ | |
57 | int wm8994_reg_read(struct wm8994 *wm8994, unsigned short reg) | |
58 | { | |
59 | unsigned short val; | |
60 | int ret; | |
61 | ||
62 | mutex_lock(&wm8994->io_lock); | |
63 | ||
64 | ret = wm8994_read(wm8994, reg, 2, &val); | |
65 | ||
66 | mutex_unlock(&wm8994->io_lock); | |
67 | ||
68 | if (ret < 0) | |
69 | return ret; | |
70 | else | |
71 | return val; | |
72 | } | |
73 | EXPORT_SYMBOL_GPL(wm8994_reg_read); | |
74 | ||
75 | /** | |
76 | * wm8994_bulk_read: Read multiple WM8994 registers | |
77 | * | |
78 | * @wm8994: Device to read from | |
79 | * @reg: First register | |
80 | * @count: Number of registers | |
81 | * @buf: Buffer to fill. | |
82 | */ | |
83 | int wm8994_bulk_read(struct wm8994 *wm8994, unsigned short reg, | |
84 | int count, u16 *buf) | |
85 | { | |
86 | int ret; | |
87 | ||
88 | mutex_lock(&wm8994->io_lock); | |
89 | ||
90 | ret = wm8994_read(wm8994, reg, count * 2, buf); | |
91 | ||
92 | mutex_unlock(&wm8994->io_lock); | |
93 | ||
94 | return ret; | |
95 | } | |
96 | EXPORT_SYMBOL_GPL(wm8994_bulk_read); | |
97 | ||
98 | static int wm8994_write(struct wm8994 *wm8994, unsigned short reg, | |
99 | int bytes, void *src) | |
100 | { | |
101 | u16 *buf = src; | |
102 | int i; | |
103 | ||
104 | BUG_ON(bytes % 2); | |
105 | BUG_ON(bytes <= 0); | |
106 | ||
107 | for (i = 0; i < bytes / 2; i++) { | |
108 | dev_vdbg(wm8994->dev, "Write %04x to R%d(0x%x)\n", | |
109 | buf[i], reg + i, reg + i); | |
110 | ||
111 | buf[i] = cpu_to_be16(buf[i]); | |
112 | } | |
113 | ||
114 | return wm8994->write_dev(wm8994, reg, bytes, src); | |
115 | } | |
116 | ||
117 | /** | |
118 | * wm8994_reg_write: Write a single WM8994 register. | |
119 | * | |
120 | * @wm8994: Device to write to. | |
121 | * @reg: Register to write to. | |
122 | * @val: Value to write. | |
123 | */ | |
124 | int wm8994_reg_write(struct wm8994 *wm8994, unsigned short reg, | |
125 | unsigned short val) | |
126 | { | |
127 | int ret; | |
128 | ||
129 | mutex_lock(&wm8994->io_lock); | |
130 | ||
131 | ret = wm8994_write(wm8994, reg, 2, &val); | |
132 | ||
133 | mutex_unlock(&wm8994->io_lock); | |
134 | ||
135 | return ret; | |
136 | } | |
137 | EXPORT_SYMBOL_GPL(wm8994_reg_write); | |
138 | ||
139 | /** | |
140 | * wm8994_set_bits: Set the value of a bitfield in a WM8994 register | |
141 | * | |
142 | * @wm8994: Device to write to. | |
143 | * @reg: Register to write to. | |
144 | * @mask: Mask of bits to set. | |
145 | * @val: Value to set (unshifted) | |
146 | */ | |
147 | int wm8994_set_bits(struct wm8994 *wm8994, unsigned short reg, | |
148 | unsigned short mask, unsigned short val) | |
149 | { | |
150 | int ret; | |
151 | u16 r; | |
152 | ||
153 | mutex_lock(&wm8994->io_lock); | |
154 | ||
155 | ret = wm8994_read(wm8994, reg, 2, &r); | |
156 | if (ret < 0) | |
157 | goto out; | |
158 | ||
159 | r &= ~mask; | |
160 | r |= val; | |
161 | ||
162 | ret = wm8994_write(wm8994, reg, 2, &r); | |
163 | ||
164 | out: | |
165 | mutex_unlock(&wm8994->io_lock); | |
166 | ||
167 | return ret; | |
168 | } | |
169 | EXPORT_SYMBOL_GPL(wm8994_set_bits); | |
170 | ||
171 | static struct mfd_cell wm8994_regulator_devs[] = { | |
172 | { .name = "wm8994-ldo", .id = 1 }, | |
173 | { .name = "wm8994-ldo", .id = 2 }, | |
174 | }; | |
175 | ||
c9fbf7e0 MB |
176 | static struct resource wm8994_codec_resources[] = { |
177 | { | |
178 | .start = WM8994_IRQ_TEMP_SHUT, | |
179 | .end = WM8994_IRQ_TEMP_WARN, | |
180 | .flags = IORESOURCE_IRQ, | |
181 | }, | |
182 | }; | |
183 | ||
184 | static struct resource wm8994_gpio_resources[] = { | |
185 | { | |
186 | .start = WM8994_IRQ_GPIO(1), | |
187 | .end = WM8994_IRQ_GPIO(11), | |
188 | .flags = IORESOURCE_IRQ, | |
189 | }, | |
190 | }; | |
191 | ||
9e501086 | 192 | static struct mfd_cell wm8994_devs[] = { |
c9fbf7e0 MB |
193 | { |
194 | .name = "wm8994-codec", | |
195 | .num_resources = ARRAY_SIZE(wm8994_codec_resources), | |
196 | .resources = wm8994_codec_resources, | |
197 | }, | |
198 | ||
199 | { | |
200 | .name = "wm8994-gpio", | |
201 | .num_resources = ARRAY_SIZE(wm8994_gpio_resources), | |
202 | .resources = wm8994_gpio_resources, | |
203 | }, | |
9e501086 MB |
204 | }; |
205 | ||
206 | /* | |
207 | * Supplies for the main bulk of CODEC; the LDO supplies are ignored | |
208 | * and should be handled via the standard regulator API supply | |
209 | * management. | |
210 | */ | |
211 | static const char *wm8994_main_supplies[] = { | |
212 | "DBVDD", | |
213 | "DCVDD", | |
214 | "AVDD1", | |
215 | "AVDD2", | |
216 | "CPVDD", | |
217 | "SPKVDD1", | |
218 | "SPKVDD2", | |
219 | }; | |
220 | ||
559e0df6 MB |
221 | static const char *wm8958_main_supplies[] = { |
222 | "DBVDD1", | |
223 | "DBVDD2", | |
224 | "DBVDD3", | |
225 | "DCVDD", | |
226 | "AVDD1", | |
227 | "AVDD2", | |
228 | "CPVDD", | |
229 | "SPKVDD1", | |
230 | "SPKVDD2", | |
231 | }; | |
232 | ||
9e501086 MB |
233 | #ifdef CONFIG_PM |
234 | static int wm8994_device_suspend(struct device *dev) | |
235 | { | |
236 | struct wm8994 *wm8994 = dev_get_drvdata(dev); | |
237 | int ret; | |
238 | ||
239 | /* GPIO configuration state is saved here since we may be configuring | |
240 | * the GPIO alternate functions even if we're not using the gpiolib | |
241 | * driver for them. | |
242 | */ | |
243 | ret = wm8994_read(wm8994, WM8994_GPIO_1, WM8994_NUM_GPIO_REGS * 2, | |
244 | &wm8994->gpio_regs); | |
245 | if (ret < 0) | |
246 | dev_err(dev, "Failed to save GPIO registers: %d\n", ret); | |
247 | ||
248 | /* For similar reasons we also stash the regulator states */ | |
249 | ret = wm8994_read(wm8994, WM8994_LDO_1, WM8994_NUM_LDO_REGS * 2, | |
250 | &wm8994->ldo_regs); | |
251 | if (ret < 0) | |
252 | dev_err(dev, "Failed to save LDO registers: %d\n", ret); | |
253 | ||
559e0df6 | 254 | ret = regulator_bulk_disable(wm8994->num_supplies, |
9e501086 MB |
255 | wm8994->supplies); |
256 | if (ret != 0) { | |
257 | dev_err(dev, "Failed to disable supplies: %d\n", ret); | |
258 | return ret; | |
259 | } | |
260 | ||
261 | return 0; | |
262 | } | |
263 | ||
264 | static int wm8994_device_resume(struct device *dev) | |
265 | { | |
266 | struct wm8994 *wm8994 = dev_get_drvdata(dev); | |
267 | int ret; | |
268 | ||
559e0df6 | 269 | ret = regulator_bulk_enable(wm8994->num_supplies, |
9e501086 MB |
270 | wm8994->supplies); |
271 | if (ret != 0) { | |
272 | dev_err(dev, "Failed to enable supplies: %d\n", ret); | |
273 | return ret; | |
274 | } | |
275 | ||
c9fbf7e0 MB |
276 | ret = wm8994_write(wm8994, WM8994_INTERRUPT_STATUS_1_MASK, |
277 | WM8994_NUM_IRQ_REGS * 2, &wm8994->irq_masks_cur); | |
278 | if (ret < 0) | |
279 | dev_err(dev, "Failed to restore interrupt masks: %d\n", ret); | |
280 | ||
9e501086 MB |
281 | ret = wm8994_write(wm8994, WM8994_LDO_1, WM8994_NUM_LDO_REGS * 2, |
282 | &wm8994->ldo_regs); | |
283 | if (ret < 0) | |
284 | dev_err(dev, "Failed to restore LDO registers: %d\n", ret); | |
285 | ||
286 | ret = wm8994_write(wm8994, WM8994_GPIO_1, WM8994_NUM_GPIO_REGS * 2, | |
287 | &wm8994->gpio_regs); | |
288 | if (ret < 0) | |
289 | dev_err(dev, "Failed to restore GPIO registers: %d\n", ret); | |
290 | ||
291 | return 0; | |
292 | } | |
293 | #endif | |
294 | ||
295 | #ifdef CONFIG_REGULATOR | |
296 | static int wm8994_ldo_in_use(struct wm8994_pdata *pdata, int ldo) | |
297 | { | |
298 | struct wm8994_ldo_pdata *ldo_pdata; | |
299 | ||
300 | if (!pdata) | |
301 | return 0; | |
302 | ||
303 | ldo_pdata = &pdata->ldo[ldo]; | |
304 | ||
305 | if (!ldo_pdata->init_data) | |
306 | return 0; | |
307 | ||
308 | return ldo_pdata->init_data->num_consumer_supplies != 0; | |
309 | } | |
310 | #else | |
311 | static int wm8994_ldo_in_use(struct wm8994_pdata *pdata, int ldo) | |
312 | { | |
313 | return 0; | |
314 | } | |
315 | #endif | |
316 | ||
317 | /* | |
318 | * Instantiate the generic non-control parts of the device. | |
319 | */ | |
559e0df6 | 320 | static int wm8994_device_init(struct wm8994 *wm8994, int irq) |
9e501086 MB |
321 | { |
322 | struct wm8994_pdata *pdata = wm8994->dev->platform_data; | |
559e0df6 | 323 | const char *devname; |
9e501086 MB |
324 | int ret, i; |
325 | ||
326 | mutex_init(&wm8994->io_lock); | |
327 | dev_set_drvdata(wm8994->dev, wm8994); | |
328 | ||
329 | /* Add the on-chip regulators first for bootstrapping */ | |
330 | ret = mfd_add_devices(wm8994->dev, -1, | |
331 | wm8994_regulator_devs, | |
332 | ARRAY_SIZE(wm8994_regulator_devs), | |
333 | NULL, 0); | |
334 | if (ret != 0) { | |
335 | dev_err(wm8994->dev, "Failed to add children: %d\n", ret); | |
336 | goto err; | |
337 | } | |
338 | ||
559e0df6 MB |
339 | switch (wm8994->type) { |
340 | case WM8994: | |
341 | wm8994->num_supplies = ARRAY_SIZE(wm8994_main_supplies); | |
342 | break; | |
343 | case WM8958: | |
344 | wm8994->num_supplies = ARRAY_SIZE(wm8958_main_supplies); | |
345 | break; | |
346 | default: | |
347 | BUG(); | |
348 | return -EINVAL; | |
349 | } | |
350 | ||
9e501086 | 351 | wm8994->supplies = kzalloc(sizeof(struct regulator_bulk_data) * |
559e0df6 | 352 | wm8994->num_supplies, |
9e501086 | 353 | GFP_KERNEL); |
fccbd21f AL |
354 | if (!wm8994->supplies) { |
355 | ret = -ENOMEM; | |
9e501086 | 356 | goto err; |
fccbd21f | 357 | } |
9e501086 | 358 | |
559e0df6 MB |
359 | switch (wm8994->type) { |
360 | case WM8994: | |
361 | for (i = 0; i < ARRAY_SIZE(wm8994_main_supplies); i++) | |
362 | wm8994->supplies[i].supply = wm8994_main_supplies[i]; | |
363 | break; | |
364 | case WM8958: | |
365 | for (i = 0; i < ARRAY_SIZE(wm8958_main_supplies); i++) | |
366 | wm8994->supplies[i].supply = wm8958_main_supplies[i]; | |
367 | break; | |
368 | default: | |
369 | BUG(); | |
370 | return -EINVAL; | |
371 | } | |
372 | ||
373 | ret = regulator_bulk_get(wm8994->dev, wm8994->num_supplies, | |
9e501086 MB |
374 | wm8994->supplies); |
375 | if (ret != 0) { | |
376 | dev_err(wm8994->dev, "Failed to get supplies: %d\n", ret); | |
7731074a | 377 | goto err_supplies; |
9e501086 MB |
378 | } |
379 | ||
559e0df6 | 380 | ret = regulator_bulk_enable(wm8994->num_supplies, |
9e501086 MB |
381 | wm8994->supplies); |
382 | if (ret != 0) { | |
383 | dev_err(wm8994->dev, "Failed to enable supplies: %d\n", ret); | |
7731074a | 384 | goto err_get; |
9e501086 MB |
385 | } |
386 | ||
387 | ret = wm8994_reg_read(wm8994, WM8994_SOFTWARE_RESET); | |
388 | if (ret < 0) { | |
389 | dev_err(wm8994->dev, "Failed to read ID register\n"); | |
390 | goto err_enable; | |
391 | } | |
559e0df6 MB |
392 | switch (ret) { |
393 | case 0x8994: | |
394 | devname = "WM8994"; | |
395 | if (wm8994->type != WM8994) | |
396 | dev_warn(wm8994->dev, "Device registered as type %d\n", | |
397 | wm8994->type); | |
398 | wm8994->type = WM8994; | |
399 | break; | |
400 | case 0x8958: | |
401 | devname = "WM8958"; | |
402 | if (wm8994->type != WM8958) | |
403 | dev_warn(wm8994->dev, "Device registered as type %d\n", | |
404 | wm8994->type); | |
405 | wm8994->type = WM8958; | |
406 | break; | |
407 | default: | |
9e501086 MB |
408 | dev_err(wm8994->dev, "Device is not a WM8994, ID is %x\n", |
409 | ret); | |
410 | ret = -EINVAL; | |
411 | goto err_enable; | |
412 | } | |
413 | ||
414 | ret = wm8994_reg_read(wm8994, WM8994_CHIP_REVISION); | |
415 | if (ret < 0) { | |
416 | dev_err(wm8994->dev, "Failed to read revision register: %d\n", | |
417 | ret); | |
418 | goto err_enable; | |
419 | } | |
420 | ||
421 | switch (ret) { | |
422 | case 0: | |
423 | case 1: | |
559e0df6 MB |
424 | if (wm8994->type == WM8994) |
425 | dev_warn(wm8994->dev, | |
426 | "revision %c not fully supported\n", | |
427 | 'A' + ret); | |
9e501086 MB |
428 | break; |
429 | default: | |
9e501086 MB |
430 | break; |
431 | } | |
432 | ||
559e0df6 | 433 | dev_info(wm8994->dev, "%s revision %c\n", devname, 'A' + ret); |
9e501086 MB |
434 | |
435 | if (pdata) { | |
c9fbf7e0 | 436 | wm8994->irq_base = pdata->irq_base; |
9e501086 MB |
437 | wm8994->gpio_base = pdata->gpio_base; |
438 | ||
439 | /* GPIO configuration is only applied if it's non-zero */ | |
440 | for (i = 0; i < ARRAY_SIZE(pdata->gpio_defaults); i++) { | |
441 | if (pdata->gpio_defaults[i]) { | |
442 | wm8994_set_bits(wm8994, WM8994_GPIO_1 + i, | |
443 | 0xffff, | |
444 | pdata->gpio_defaults[i]); | |
445 | } | |
446 | } | |
447 | } | |
448 | ||
449 | /* In some system designs where the regulators are not in use, | |
450 | * we can achieve a small reduction in leakage currents by | |
451 | * floating LDO outputs. This bit makes no difference if the | |
452 | * LDOs are enabled, it only affects cases where the LDOs were | |
453 | * in operation and are then disabled. | |
454 | */ | |
455 | for (i = 0; i < WM8994_NUM_LDO_REGS; i++) { | |
456 | if (wm8994_ldo_in_use(pdata, i)) | |
457 | wm8994_set_bits(wm8994, WM8994_LDO_1 + i, | |
458 | WM8994_LDO1_DISCH, WM8994_LDO1_DISCH); | |
459 | else | |
460 | wm8994_set_bits(wm8994, WM8994_LDO_1 + i, | |
461 | WM8994_LDO1_DISCH, 0); | |
462 | } | |
463 | ||
c9fbf7e0 MB |
464 | wm8994_irq_init(wm8994); |
465 | ||
9e501086 MB |
466 | ret = mfd_add_devices(wm8994->dev, -1, |
467 | wm8994_devs, ARRAY_SIZE(wm8994_devs), | |
468 | NULL, 0); | |
469 | if (ret != 0) { | |
470 | dev_err(wm8994->dev, "Failed to add children: %d\n", ret); | |
c9fbf7e0 | 471 | goto err_irq; |
9e501086 MB |
472 | } |
473 | ||
474 | return 0; | |
475 | ||
c9fbf7e0 MB |
476 | err_irq: |
477 | wm8994_irq_exit(wm8994); | |
9e501086 | 478 | err_enable: |
559e0df6 | 479 | regulator_bulk_disable(wm8994->num_supplies, |
9e501086 MB |
480 | wm8994->supplies); |
481 | err_get: | |
559e0df6 | 482 | regulator_bulk_free(wm8994->num_supplies, wm8994->supplies); |
9e501086 MB |
483 | err_supplies: |
484 | kfree(wm8994->supplies); | |
485 | err: | |
486 | mfd_remove_devices(wm8994->dev); | |
487 | kfree(wm8994); | |
488 | return ret; | |
489 | } | |
490 | ||
491 | static void wm8994_device_exit(struct wm8994 *wm8994) | |
492 | { | |
493 | mfd_remove_devices(wm8994->dev); | |
c9fbf7e0 | 494 | wm8994_irq_exit(wm8994); |
559e0df6 | 495 | regulator_bulk_disable(wm8994->num_supplies, |
9e501086 | 496 | wm8994->supplies); |
559e0df6 | 497 | regulator_bulk_free(wm8994->num_supplies, wm8994->supplies); |
9e501086 MB |
498 | kfree(wm8994->supplies); |
499 | kfree(wm8994); | |
500 | } | |
501 | ||
502 | static int wm8994_i2c_read_device(struct wm8994 *wm8994, unsigned short reg, | |
503 | int bytes, void *dest) | |
504 | { | |
505 | struct i2c_client *i2c = wm8994->control_data; | |
506 | int ret; | |
507 | u16 r = cpu_to_be16(reg); | |
508 | ||
509 | ret = i2c_master_send(i2c, (unsigned char *)&r, 2); | |
510 | if (ret < 0) | |
511 | return ret; | |
512 | if (ret != 2) | |
513 | return -EIO; | |
514 | ||
515 | ret = i2c_master_recv(i2c, dest, bytes); | |
516 | if (ret < 0) | |
517 | return ret; | |
518 | if (ret != bytes) | |
519 | return -EIO; | |
520 | return 0; | |
521 | } | |
522 | ||
523 | /* Currently we allocate the write buffer on the stack; this is OK for | |
524 | * small writes - if we need to do large writes this will need to be | |
525 | * revised. | |
526 | */ | |
527 | static int wm8994_i2c_write_device(struct wm8994 *wm8994, unsigned short reg, | |
528 | int bytes, void *src) | |
529 | { | |
530 | struct i2c_client *i2c = wm8994->control_data; | |
531 | unsigned char msg[bytes + 2]; | |
532 | int ret; | |
533 | ||
534 | reg = cpu_to_be16(reg); | |
535 | memcpy(&msg[0], ®, 2); | |
536 | memcpy(&msg[2], src, bytes); | |
537 | ||
538 | ret = i2c_master_send(i2c, msg, bytes + 2); | |
539 | if (ret < 0) | |
540 | return ret; | |
541 | if (ret < bytes + 2) | |
542 | return -EIO; | |
543 | ||
544 | return 0; | |
545 | } | |
546 | ||
547 | static int wm8994_i2c_probe(struct i2c_client *i2c, | |
548 | const struct i2c_device_id *id) | |
549 | { | |
550 | struct wm8994 *wm8994; | |
551 | ||
552 | wm8994 = kzalloc(sizeof(struct wm8994), GFP_KERNEL); | |
d0a11693 | 553 | if (wm8994 == NULL) |
9e501086 | 554 | return -ENOMEM; |
9e501086 MB |
555 | |
556 | i2c_set_clientdata(i2c, wm8994); | |
557 | wm8994->dev = &i2c->dev; | |
558 | wm8994->control_data = i2c; | |
559 | wm8994->read_dev = wm8994_i2c_read_device; | |
560 | wm8994->write_dev = wm8994_i2c_write_device; | |
c9fbf7e0 | 561 | wm8994->irq = i2c->irq; |
559e0df6 | 562 | wm8994->type = id->driver_data; |
9e501086 | 563 | |
559e0df6 | 564 | return wm8994_device_init(wm8994, i2c->irq); |
9e501086 MB |
565 | } |
566 | ||
567 | static int wm8994_i2c_remove(struct i2c_client *i2c) | |
568 | { | |
569 | struct wm8994 *wm8994 = i2c_get_clientdata(i2c); | |
570 | ||
571 | wm8994_device_exit(wm8994); | |
572 | ||
573 | return 0; | |
574 | } | |
575 | ||
576 | #ifdef CONFIG_PM | |
577 | static int wm8994_i2c_suspend(struct i2c_client *i2c, pm_message_t state) | |
578 | { | |
579 | return wm8994_device_suspend(&i2c->dev); | |
580 | } | |
581 | ||
582 | static int wm8994_i2c_resume(struct i2c_client *i2c) | |
583 | { | |
584 | return wm8994_device_resume(&i2c->dev); | |
585 | } | |
586 | #else | |
587 | #define wm8994_i2c_suspend NULL | |
588 | #define wm8994_i2c_resume NULL | |
589 | #endif | |
590 | ||
591 | static const struct i2c_device_id wm8994_i2c_id[] = { | |
559e0df6 MB |
592 | { "wm8994", WM8994 }, |
593 | { "wm8958", WM8958 }, | |
9e501086 MB |
594 | { } |
595 | }; | |
596 | MODULE_DEVICE_TABLE(i2c, wm8994_i2c_id); | |
597 | ||
598 | static struct i2c_driver wm8994_i2c_driver = { | |
599 | .driver = { | |
600 | .name = "wm8994", | |
601 | .owner = THIS_MODULE, | |
602 | }, | |
603 | .probe = wm8994_i2c_probe, | |
604 | .remove = wm8994_i2c_remove, | |
605 | .suspend = wm8994_i2c_suspend, | |
606 | .resume = wm8994_i2c_resume, | |
607 | .id_table = wm8994_i2c_id, | |
608 | }; | |
609 | ||
610 | static int __init wm8994_i2c_init(void) | |
611 | { | |
612 | int ret; | |
613 | ||
614 | ret = i2c_add_driver(&wm8994_i2c_driver); | |
615 | if (ret != 0) | |
616 | pr_err("Failed to register wm8994 I2C driver: %d\n", ret); | |
617 | ||
618 | return ret; | |
619 | } | |
620 | module_init(wm8994_i2c_init); | |
621 | ||
622 | static void __exit wm8994_i2c_exit(void) | |
623 | { | |
624 | i2c_del_driver(&wm8994_i2c_driver); | |
625 | } | |
626 | module_exit(wm8994_i2c_exit); | |
627 | ||
628 | MODULE_DESCRIPTION("Core support for the WM8994 audio CODEC"); | |
629 | MODULE_LICENSE("GPL"); | |
630 | MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); |