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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> | |
d450f19e | 21 | #include <linux/pm_runtime.h> |
9e501086 MB |
22 | #include <linux/regulator/consumer.h> |
23 | #include <linux/regulator/machine.h> | |
24 | ||
25 | #include <linux/mfd/wm8994/core.h> | |
26 | #include <linux/mfd/wm8994/pdata.h> | |
27 | #include <linux/mfd/wm8994/registers.h> | |
28 | ||
29 | static int wm8994_read(struct wm8994 *wm8994, unsigned short reg, | |
30 | int bytes, void *dest) | |
31 | { | |
32 | int ret, i; | |
33 | u16 *buf = dest; | |
34 | ||
35 | BUG_ON(bytes % 2); | |
36 | BUG_ON(bytes <= 0); | |
37 | ||
38 | ret = wm8994->read_dev(wm8994, reg, bytes, dest); | |
39 | if (ret < 0) | |
40 | return ret; | |
41 | ||
42 | for (i = 0; i < bytes / 2; i++) { | |
43 | buf[i] = be16_to_cpu(buf[i]); | |
44 | ||
45 | dev_vdbg(wm8994->dev, "Read %04x from R%d(0x%x)\n", | |
46 | buf[i], reg + i, reg + i); | |
47 | } | |
48 | ||
49 | return 0; | |
50 | } | |
51 | ||
52 | /** | |
53 | * wm8994_reg_read: Read a single WM8994 register. | |
54 | * | |
55 | * @wm8994: Device to read from. | |
56 | * @reg: Register to read. | |
57 | */ | |
58 | int wm8994_reg_read(struct wm8994 *wm8994, unsigned short reg) | |
59 | { | |
60 | unsigned short val; | |
61 | int ret; | |
62 | ||
63 | mutex_lock(&wm8994->io_lock); | |
64 | ||
65 | ret = wm8994_read(wm8994, reg, 2, &val); | |
66 | ||
67 | mutex_unlock(&wm8994->io_lock); | |
68 | ||
69 | if (ret < 0) | |
70 | return ret; | |
71 | else | |
72 | return val; | |
73 | } | |
74 | EXPORT_SYMBOL_GPL(wm8994_reg_read); | |
75 | ||
76 | /** | |
77 | * wm8994_bulk_read: Read multiple WM8994 registers | |
78 | * | |
79 | * @wm8994: Device to read from | |
80 | * @reg: First register | |
81 | * @count: Number of registers | |
82 | * @buf: Buffer to fill. | |
83 | */ | |
84 | int wm8994_bulk_read(struct wm8994 *wm8994, unsigned short reg, | |
85 | int count, u16 *buf) | |
86 | { | |
87 | int ret; | |
88 | ||
89 | mutex_lock(&wm8994->io_lock); | |
90 | ||
91 | ret = wm8994_read(wm8994, reg, count * 2, buf); | |
92 | ||
93 | mutex_unlock(&wm8994->io_lock); | |
94 | ||
95 | return ret; | |
96 | } | |
97 | EXPORT_SYMBOL_GPL(wm8994_bulk_read); | |
98 | ||
99 | static int wm8994_write(struct wm8994 *wm8994, unsigned short reg, | |
100 | int bytes, void *src) | |
101 | { | |
102 | u16 *buf = src; | |
103 | int i; | |
104 | ||
105 | BUG_ON(bytes % 2); | |
106 | BUG_ON(bytes <= 0); | |
107 | ||
108 | for (i = 0; i < bytes / 2; i++) { | |
109 | dev_vdbg(wm8994->dev, "Write %04x to R%d(0x%x)\n", | |
110 | buf[i], reg + i, reg + i); | |
111 | ||
112 | buf[i] = cpu_to_be16(buf[i]); | |
113 | } | |
114 | ||
115 | return wm8994->write_dev(wm8994, reg, bytes, src); | |
116 | } | |
117 | ||
118 | /** | |
119 | * wm8994_reg_write: Write a single WM8994 register. | |
120 | * | |
121 | * @wm8994: Device to write to. | |
122 | * @reg: Register to write to. | |
123 | * @val: Value to write. | |
124 | */ | |
125 | int wm8994_reg_write(struct wm8994 *wm8994, unsigned short reg, | |
126 | unsigned short val) | |
127 | { | |
128 | int ret; | |
129 | ||
130 | mutex_lock(&wm8994->io_lock); | |
131 | ||
132 | ret = wm8994_write(wm8994, reg, 2, &val); | |
133 | ||
134 | mutex_unlock(&wm8994->io_lock); | |
135 | ||
136 | return ret; | |
137 | } | |
138 | EXPORT_SYMBOL_GPL(wm8994_reg_write); | |
139 | ||
140 | /** | |
141 | * wm8994_set_bits: Set the value of a bitfield in a WM8994 register | |
142 | * | |
143 | * @wm8994: Device to write to. | |
144 | * @reg: Register to write to. | |
145 | * @mask: Mask of bits to set. | |
146 | * @val: Value to set (unshifted) | |
147 | */ | |
148 | int wm8994_set_bits(struct wm8994 *wm8994, unsigned short reg, | |
149 | unsigned short mask, unsigned short val) | |
150 | { | |
151 | int ret; | |
152 | u16 r; | |
153 | ||
154 | mutex_lock(&wm8994->io_lock); | |
155 | ||
156 | ret = wm8994_read(wm8994, reg, 2, &r); | |
157 | if (ret < 0) | |
158 | goto out; | |
159 | ||
160 | r &= ~mask; | |
161 | r |= val; | |
162 | ||
163 | ret = wm8994_write(wm8994, reg, 2, &r); | |
164 | ||
165 | out: | |
166 | mutex_unlock(&wm8994->io_lock); | |
167 | ||
168 | return ret; | |
169 | } | |
170 | EXPORT_SYMBOL_GPL(wm8994_set_bits); | |
171 | ||
172 | static struct mfd_cell wm8994_regulator_devs[] = { | |
d450f19e MB |
173 | { |
174 | .name = "wm8994-ldo", | |
175 | .id = 1, | |
176 | .pm_runtime_no_callbacks = true, | |
177 | }, | |
178 | { | |
179 | .name = "wm8994-ldo", | |
180 | .id = 2, | |
181 | .pm_runtime_no_callbacks = true, | |
182 | }, | |
9e501086 MB |
183 | }; |
184 | ||
c9fbf7e0 MB |
185 | static struct resource wm8994_codec_resources[] = { |
186 | { | |
187 | .start = WM8994_IRQ_TEMP_SHUT, | |
188 | .end = WM8994_IRQ_TEMP_WARN, | |
189 | .flags = IORESOURCE_IRQ, | |
190 | }, | |
191 | }; | |
192 | ||
193 | static struct resource wm8994_gpio_resources[] = { | |
194 | { | |
195 | .start = WM8994_IRQ_GPIO(1), | |
196 | .end = WM8994_IRQ_GPIO(11), | |
197 | .flags = IORESOURCE_IRQ, | |
198 | }, | |
199 | }; | |
200 | ||
9e501086 | 201 | static struct mfd_cell wm8994_devs[] = { |
c9fbf7e0 MB |
202 | { |
203 | .name = "wm8994-codec", | |
204 | .num_resources = ARRAY_SIZE(wm8994_codec_resources), | |
205 | .resources = wm8994_codec_resources, | |
206 | }, | |
207 | ||
208 | { | |
209 | .name = "wm8994-gpio", | |
210 | .num_resources = ARRAY_SIZE(wm8994_gpio_resources), | |
211 | .resources = wm8994_gpio_resources, | |
d450f19e | 212 | .pm_runtime_no_callbacks = true, |
c9fbf7e0 | 213 | }, |
9e501086 MB |
214 | }; |
215 | ||
216 | /* | |
217 | * Supplies for the main bulk of CODEC; the LDO supplies are ignored | |
218 | * and should be handled via the standard regulator API supply | |
219 | * management. | |
220 | */ | |
221 | static const char *wm8994_main_supplies[] = { | |
222 | "DBVDD", | |
223 | "DCVDD", | |
224 | "AVDD1", | |
225 | "AVDD2", | |
226 | "CPVDD", | |
227 | "SPKVDD1", | |
228 | "SPKVDD2", | |
229 | }; | |
230 | ||
559e0df6 MB |
231 | static const char *wm8958_main_supplies[] = { |
232 | "DBVDD1", | |
233 | "DBVDD2", | |
234 | "DBVDD3", | |
235 | "DCVDD", | |
236 | "AVDD1", | |
237 | "AVDD2", | |
238 | "CPVDD", | |
239 | "SPKVDD1", | |
240 | "SPKVDD2", | |
241 | }; | |
242 | ||
9e501086 | 243 | #ifdef CONFIG_PM |
d450f19e | 244 | static int wm8994_suspend(struct device *dev) |
9e501086 MB |
245 | { |
246 | struct wm8994 *wm8994 = dev_get_drvdata(dev); | |
247 | int ret; | |
248 | ||
249 | /* GPIO configuration state is saved here since we may be configuring | |
250 | * the GPIO alternate functions even if we're not using the gpiolib | |
251 | * driver for them. | |
252 | */ | |
253 | ret = wm8994_read(wm8994, WM8994_GPIO_1, WM8994_NUM_GPIO_REGS * 2, | |
254 | &wm8994->gpio_regs); | |
255 | if (ret < 0) | |
256 | dev_err(dev, "Failed to save GPIO registers: %d\n", ret); | |
257 | ||
258 | /* For similar reasons we also stash the regulator states */ | |
259 | ret = wm8994_read(wm8994, WM8994_LDO_1, WM8994_NUM_LDO_REGS * 2, | |
260 | &wm8994->ldo_regs); | |
261 | if (ret < 0) | |
262 | dev_err(dev, "Failed to save LDO registers: %d\n", ret); | |
263 | ||
559e0df6 | 264 | ret = regulator_bulk_disable(wm8994->num_supplies, |
9e501086 MB |
265 | wm8994->supplies); |
266 | if (ret != 0) { | |
267 | dev_err(dev, "Failed to disable supplies: %d\n", ret); | |
268 | return ret; | |
269 | } | |
270 | ||
271 | return 0; | |
272 | } | |
273 | ||
d450f19e | 274 | static int wm8994_resume(struct device *dev) |
9e501086 MB |
275 | { |
276 | struct wm8994 *wm8994 = dev_get_drvdata(dev); | |
277 | int ret; | |
278 | ||
559e0df6 | 279 | ret = regulator_bulk_enable(wm8994->num_supplies, |
9e501086 MB |
280 | wm8994->supplies); |
281 | if (ret != 0) { | |
282 | dev_err(dev, "Failed to enable supplies: %d\n", ret); | |
283 | return ret; | |
284 | } | |
285 | ||
c9fbf7e0 MB |
286 | ret = wm8994_write(wm8994, WM8994_INTERRUPT_STATUS_1_MASK, |
287 | WM8994_NUM_IRQ_REGS * 2, &wm8994->irq_masks_cur); | |
288 | if (ret < 0) | |
289 | dev_err(dev, "Failed to restore interrupt masks: %d\n", ret); | |
290 | ||
9e501086 MB |
291 | ret = wm8994_write(wm8994, WM8994_LDO_1, WM8994_NUM_LDO_REGS * 2, |
292 | &wm8994->ldo_regs); | |
293 | if (ret < 0) | |
294 | dev_err(dev, "Failed to restore LDO registers: %d\n", ret); | |
295 | ||
296 | ret = wm8994_write(wm8994, WM8994_GPIO_1, WM8994_NUM_GPIO_REGS * 2, | |
297 | &wm8994->gpio_regs); | |
298 | if (ret < 0) | |
299 | dev_err(dev, "Failed to restore GPIO registers: %d\n", ret); | |
300 | ||
301 | return 0; | |
302 | } | |
303 | #endif | |
304 | ||
305 | #ifdef CONFIG_REGULATOR | |
306 | static int wm8994_ldo_in_use(struct wm8994_pdata *pdata, int ldo) | |
307 | { | |
308 | struct wm8994_ldo_pdata *ldo_pdata; | |
309 | ||
310 | if (!pdata) | |
311 | return 0; | |
312 | ||
313 | ldo_pdata = &pdata->ldo[ldo]; | |
314 | ||
315 | if (!ldo_pdata->init_data) | |
316 | return 0; | |
317 | ||
318 | return ldo_pdata->init_data->num_consumer_supplies != 0; | |
319 | } | |
320 | #else | |
321 | static int wm8994_ldo_in_use(struct wm8994_pdata *pdata, int ldo) | |
322 | { | |
323 | return 0; | |
324 | } | |
325 | #endif | |
326 | ||
327 | /* | |
328 | * Instantiate the generic non-control parts of the device. | |
329 | */ | |
559e0df6 | 330 | static int wm8994_device_init(struct wm8994 *wm8994, int irq) |
9e501086 MB |
331 | { |
332 | struct wm8994_pdata *pdata = wm8994->dev->platform_data; | |
559e0df6 | 333 | const char *devname; |
9e501086 MB |
334 | int ret, i; |
335 | ||
336 | mutex_init(&wm8994->io_lock); | |
337 | dev_set_drvdata(wm8994->dev, wm8994); | |
338 | ||
339 | /* Add the on-chip regulators first for bootstrapping */ | |
340 | ret = mfd_add_devices(wm8994->dev, -1, | |
341 | wm8994_regulator_devs, | |
342 | ARRAY_SIZE(wm8994_regulator_devs), | |
343 | NULL, 0); | |
344 | if (ret != 0) { | |
345 | dev_err(wm8994->dev, "Failed to add children: %d\n", ret); | |
346 | goto err; | |
347 | } | |
348 | ||
559e0df6 MB |
349 | switch (wm8994->type) { |
350 | case WM8994: | |
351 | wm8994->num_supplies = ARRAY_SIZE(wm8994_main_supplies); | |
352 | break; | |
353 | case WM8958: | |
354 | wm8994->num_supplies = ARRAY_SIZE(wm8958_main_supplies); | |
355 | break; | |
356 | default: | |
357 | BUG(); | |
358 | return -EINVAL; | |
359 | } | |
360 | ||
9e501086 | 361 | wm8994->supplies = kzalloc(sizeof(struct regulator_bulk_data) * |
559e0df6 | 362 | wm8994->num_supplies, |
9e501086 | 363 | GFP_KERNEL); |
fccbd21f AL |
364 | if (!wm8994->supplies) { |
365 | ret = -ENOMEM; | |
9e501086 | 366 | goto err; |
fccbd21f | 367 | } |
9e501086 | 368 | |
559e0df6 MB |
369 | switch (wm8994->type) { |
370 | case WM8994: | |
371 | for (i = 0; i < ARRAY_SIZE(wm8994_main_supplies); i++) | |
372 | wm8994->supplies[i].supply = wm8994_main_supplies[i]; | |
373 | break; | |
374 | case WM8958: | |
375 | for (i = 0; i < ARRAY_SIZE(wm8958_main_supplies); i++) | |
376 | wm8994->supplies[i].supply = wm8958_main_supplies[i]; | |
377 | break; | |
378 | default: | |
379 | BUG(); | |
380 | return -EINVAL; | |
381 | } | |
382 | ||
383 | ret = regulator_bulk_get(wm8994->dev, wm8994->num_supplies, | |
9e501086 MB |
384 | wm8994->supplies); |
385 | if (ret != 0) { | |
386 | dev_err(wm8994->dev, "Failed to get supplies: %d\n", ret); | |
7731074a | 387 | goto err_supplies; |
9e501086 MB |
388 | } |
389 | ||
559e0df6 | 390 | ret = regulator_bulk_enable(wm8994->num_supplies, |
9e501086 MB |
391 | wm8994->supplies); |
392 | if (ret != 0) { | |
393 | dev_err(wm8994->dev, "Failed to enable supplies: %d\n", ret); | |
7731074a | 394 | goto err_get; |
9e501086 MB |
395 | } |
396 | ||
397 | ret = wm8994_reg_read(wm8994, WM8994_SOFTWARE_RESET); | |
398 | if (ret < 0) { | |
399 | dev_err(wm8994->dev, "Failed to read ID register\n"); | |
400 | goto err_enable; | |
401 | } | |
559e0df6 MB |
402 | switch (ret) { |
403 | case 0x8994: | |
404 | devname = "WM8994"; | |
405 | if (wm8994->type != WM8994) | |
406 | dev_warn(wm8994->dev, "Device registered as type %d\n", | |
407 | wm8994->type); | |
408 | wm8994->type = WM8994; | |
409 | break; | |
410 | case 0x8958: | |
411 | devname = "WM8958"; | |
412 | if (wm8994->type != WM8958) | |
413 | dev_warn(wm8994->dev, "Device registered as type %d\n", | |
414 | wm8994->type); | |
415 | wm8994->type = WM8958; | |
416 | break; | |
417 | default: | |
9e501086 MB |
418 | dev_err(wm8994->dev, "Device is not a WM8994, ID is %x\n", |
419 | ret); | |
420 | ret = -EINVAL; | |
421 | goto err_enable; | |
422 | } | |
423 | ||
424 | ret = wm8994_reg_read(wm8994, WM8994_CHIP_REVISION); | |
425 | if (ret < 0) { | |
426 | dev_err(wm8994->dev, "Failed to read revision register: %d\n", | |
427 | ret); | |
428 | goto err_enable; | |
429 | } | |
430 | ||
431 | switch (ret) { | |
432 | case 0: | |
433 | case 1: | |
559e0df6 MB |
434 | if (wm8994->type == WM8994) |
435 | dev_warn(wm8994->dev, | |
436 | "revision %c not fully supported\n", | |
437 | 'A' + ret); | |
9e501086 MB |
438 | break; |
439 | default: | |
9e501086 MB |
440 | break; |
441 | } | |
442 | ||
559e0df6 | 443 | dev_info(wm8994->dev, "%s revision %c\n", devname, 'A' + ret); |
9e501086 MB |
444 | |
445 | if (pdata) { | |
c9fbf7e0 | 446 | wm8994->irq_base = pdata->irq_base; |
9e501086 MB |
447 | wm8994->gpio_base = pdata->gpio_base; |
448 | ||
449 | /* GPIO configuration is only applied if it's non-zero */ | |
450 | for (i = 0; i < ARRAY_SIZE(pdata->gpio_defaults); i++) { | |
451 | if (pdata->gpio_defaults[i]) { | |
452 | wm8994_set_bits(wm8994, WM8994_GPIO_1 + i, | |
453 | 0xffff, | |
454 | pdata->gpio_defaults[i]); | |
455 | } | |
456 | } | |
457 | } | |
458 | ||
459 | /* In some system designs where the regulators are not in use, | |
460 | * we can achieve a small reduction in leakage currents by | |
461 | * floating LDO outputs. This bit makes no difference if the | |
462 | * LDOs are enabled, it only affects cases where the LDOs were | |
463 | * in operation and are then disabled. | |
464 | */ | |
465 | for (i = 0; i < WM8994_NUM_LDO_REGS; i++) { | |
466 | if (wm8994_ldo_in_use(pdata, i)) | |
467 | wm8994_set_bits(wm8994, WM8994_LDO_1 + i, | |
468 | WM8994_LDO1_DISCH, WM8994_LDO1_DISCH); | |
469 | else | |
470 | wm8994_set_bits(wm8994, WM8994_LDO_1 + i, | |
471 | WM8994_LDO1_DISCH, 0); | |
472 | } | |
473 | ||
c9fbf7e0 MB |
474 | wm8994_irq_init(wm8994); |
475 | ||
9e501086 MB |
476 | ret = mfd_add_devices(wm8994->dev, -1, |
477 | wm8994_devs, ARRAY_SIZE(wm8994_devs), | |
478 | NULL, 0); | |
479 | if (ret != 0) { | |
480 | dev_err(wm8994->dev, "Failed to add children: %d\n", ret); | |
c9fbf7e0 | 481 | goto err_irq; |
9e501086 MB |
482 | } |
483 | ||
d450f19e MB |
484 | pm_runtime_enable(wm8994->dev); |
485 | pm_runtime_resume(wm8994->dev); | |
486 | ||
9e501086 MB |
487 | return 0; |
488 | ||
c9fbf7e0 MB |
489 | err_irq: |
490 | wm8994_irq_exit(wm8994); | |
9e501086 | 491 | err_enable: |
559e0df6 | 492 | regulator_bulk_disable(wm8994->num_supplies, |
9e501086 MB |
493 | wm8994->supplies); |
494 | err_get: | |
559e0df6 | 495 | regulator_bulk_free(wm8994->num_supplies, wm8994->supplies); |
9e501086 MB |
496 | err_supplies: |
497 | kfree(wm8994->supplies); | |
498 | err: | |
499 | mfd_remove_devices(wm8994->dev); | |
500 | kfree(wm8994); | |
501 | return ret; | |
502 | } | |
503 | ||
504 | static void wm8994_device_exit(struct wm8994 *wm8994) | |
505 | { | |
d450f19e | 506 | pm_runtime_disable(wm8994->dev); |
9e501086 | 507 | mfd_remove_devices(wm8994->dev); |
c9fbf7e0 | 508 | wm8994_irq_exit(wm8994); |
559e0df6 | 509 | regulator_bulk_disable(wm8994->num_supplies, |
9e501086 | 510 | wm8994->supplies); |
559e0df6 | 511 | regulator_bulk_free(wm8994->num_supplies, wm8994->supplies); |
9e501086 MB |
512 | kfree(wm8994->supplies); |
513 | kfree(wm8994); | |
514 | } | |
515 | ||
516 | static int wm8994_i2c_read_device(struct wm8994 *wm8994, unsigned short reg, | |
517 | int bytes, void *dest) | |
518 | { | |
519 | struct i2c_client *i2c = wm8994->control_data; | |
520 | int ret; | |
521 | u16 r = cpu_to_be16(reg); | |
522 | ||
523 | ret = i2c_master_send(i2c, (unsigned char *)&r, 2); | |
524 | if (ret < 0) | |
525 | return ret; | |
526 | if (ret != 2) | |
527 | return -EIO; | |
528 | ||
529 | ret = i2c_master_recv(i2c, dest, bytes); | |
530 | if (ret < 0) | |
531 | return ret; | |
532 | if (ret != bytes) | |
533 | return -EIO; | |
534 | return 0; | |
535 | } | |
536 | ||
537 | /* Currently we allocate the write buffer on the stack; this is OK for | |
538 | * small writes - if we need to do large writes this will need to be | |
539 | * revised. | |
540 | */ | |
541 | static int wm8994_i2c_write_device(struct wm8994 *wm8994, unsigned short reg, | |
542 | int bytes, void *src) | |
543 | { | |
544 | struct i2c_client *i2c = wm8994->control_data; | |
545 | unsigned char msg[bytes + 2]; | |
546 | int ret; | |
547 | ||
548 | reg = cpu_to_be16(reg); | |
549 | memcpy(&msg[0], ®, 2); | |
550 | memcpy(&msg[2], src, bytes); | |
551 | ||
552 | ret = i2c_master_send(i2c, msg, bytes + 2); | |
553 | if (ret < 0) | |
554 | return ret; | |
555 | if (ret < bytes + 2) | |
556 | return -EIO; | |
557 | ||
558 | return 0; | |
559 | } | |
560 | ||
561 | static int wm8994_i2c_probe(struct i2c_client *i2c, | |
562 | const struct i2c_device_id *id) | |
563 | { | |
564 | struct wm8994 *wm8994; | |
565 | ||
566 | wm8994 = kzalloc(sizeof(struct wm8994), GFP_KERNEL); | |
d0a11693 | 567 | if (wm8994 == NULL) |
9e501086 | 568 | return -ENOMEM; |
9e501086 MB |
569 | |
570 | i2c_set_clientdata(i2c, wm8994); | |
571 | wm8994->dev = &i2c->dev; | |
572 | wm8994->control_data = i2c; | |
573 | wm8994->read_dev = wm8994_i2c_read_device; | |
574 | wm8994->write_dev = wm8994_i2c_write_device; | |
c9fbf7e0 | 575 | wm8994->irq = i2c->irq; |
559e0df6 | 576 | wm8994->type = id->driver_data; |
9e501086 | 577 | |
559e0df6 | 578 | return wm8994_device_init(wm8994, i2c->irq); |
9e501086 MB |
579 | } |
580 | ||
581 | static int wm8994_i2c_remove(struct i2c_client *i2c) | |
582 | { | |
583 | struct wm8994 *wm8994 = i2c_get_clientdata(i2c); | |
584 | ||
585 | wm8994_device_exit(wm8994); | |
586 | ||
587 | return 0; | |
588 | } | |
589 | ||
9e501086 | 590 | static const struct i2c_device_id wm8994_i2c_id[] = { |
559e0df6 MB |
591 | { "wm8994", WM8994 }, |
592 | { "wm8958", WM8958 }, | |
9e501086 MB |
593 | { } |
594 | }; | |
595 | MODULE_DEVICE_TABLE(i2c, wm8994_i2c_id); | |
596 | ||
d450f19e MB |
597 | UNIVERSAL_DEV_PM_OPS(wm8994_pm_ops, wm8994_suspend, wm8994_resume, NULL); |
598 | ||
9e501086 MB |
599 | static struct i2c_driver wm8994_i2c_driver = { |
600 | .driver = { | |
d450f19e MB |
601 | .name = "wm8994", |
602 | .owner = THIS_MODULE, | |
603 | .pm = &wm8994_pm_ops, | |
9e501086 MB |
604 | }, |
605 | .probe = wm8994_i2c_probe, | |
606 | .remove = wm8994_i2c_remove, | |
9e501086 MB |
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>"); |