Commit | Line | Data |
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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 | ||
77bd70e9 MB |
249 | /* Don't actually go through with the suspend if the CODEC is |
250 | * still active (eg, for audio passthrough from CP. */ | |
251 | ret = wm8994_reg_read(wm8994, WM8994_POWER_MANAGEMENT_1); | |
252 | if (ret < 0) { | |
253 | dev_err(dev, "Failed to read power status: %d\n", ret); | |
254 | } else if (ret & WM8994_VMID_SEL_MASK) { | |
255 | dev_dbg(dev, "CODEC still active, ignoring suspend\n"); | |
256 | return 0; | |
257 | } | |
258 | ||
9e501086 MB |
259 | /* GPIO configuration state is saved here since we may be configuring |
260 | * the GPIO alternate functions even if we're not using the gpiolib | |
261 | * driver for them. | |
262 | */ | |
263 | ret = wm8994_read(wm8994, WM8994_GPIO_1, WM8994_NUM_GPIO_REGS * 2, | |
264 | &wm8994->gpio_regs); | |
265 | if (ret < 0) | |
266 | dev_err(dev, "Failed to save GPIO registers: %d\n", ret); | |
267 | ||
268 | /* For similar reasons we also stash the regulator states */ | |
269 | ret = wm8994_read(wm8994, WM8994_LDO_1, WM8994_NUM_LDO_REGS * 2, | |
270 | &wm8994->ldo_regs); | |
271 | if (ret < 0) | |
272 | dev_err(dev, "Failed to save LDO registers: %d\n", ret); | |
273 | ||
77bd70e9 MB |
274 | wm8994->suspended = true; |
275 | ||
559e0df6 | 276 | ret = regulator_bulk_disable(wm8994->num_supplies, |
9e501086 MB |
277 | wm8994->supplies); |
278 | if (ret != 0) { | |
279 | dev_err(dev, "Failed to disable supplies: %d\n", ret); | |
280 | return ret; | |
281 | } | |
282 | ||
283 | return 0; | |
284 | } | |
285 | ||
d450f19e | 286 | static int wm8994_resume(struct device *dev) |
9e501086 MB |
287 | { |
288 | struct wm8994 *wm8994 = dev_get_drvdata(dev); | |
289 | int ret; | |
290 | ||
77bd70e9 MB |
291 | /* We may have lied to the PM core about suspending */ |
292 | if (!wm8994->suspended) | |
293 | return 0; | |
294 | ||
559e0df6 | 295 | ret = regulator_bulk_enable(wm8994->num_supplies, |
9e501086 MB |
296 | wm8994->supplies); |
297 | if (ret != 0) { | |
298 | dev_err(dev, "Failed to enable supplies: %d\n", ret); | |
299 | return ret; | |
300 | } | |
301 | ||
c9fbf7e0 MB |
302 | ret = wm8994_write(wm8994, WM8994_INTERRUPT_STATUS_1_MASK, |
303 | WM8994_NUM_IRQ_REGS * 2, &wm8994->irq_masks_cur); | |
304 | if (ret < 0) | |
305 | dev_err(dev, "Failed to restore interrupt masks: %d\n", ret); | |
306 | ||
9e501086 MB |
307 | ret = wm8994_write(wm8994, WM8994_LDO_1, WM8994_NUM_LDO_REGS * 2, |
308 | &wm8994->ldo_regs); | |
309 | if (ret < 0) | |
310 | dev_err(dev, "Failed to restore LDO registers: %d\n", ret); | |
311 | ||
312 | ret = wm8994_write(wm8994, WM8994_GPIO_1, WM8994_NUM_GPIO_REGS * 2, | |
313 | &wm8994->gpio_regs); | |
314 | if (ret < 0) | |
315 | dev_err(dev, "Failed to restore GPIO registers: %d\n", ret); | |
316 | ||
77bd70e9 MB |
317 | wm8994->suspended = false; |
318 | ||
9e501086 MB |
319 | return 0; |
320 | } | |
321 | #endif | |
322 | ||
323 | #ifdef CONFIG_REGULATOR | |
324 | static int wm8994_ldo_in_use(struct wm8994_pdata *pdata, int ldo) | |
325 | { | |
326 | struct wm8994_ldo_pdata *ldo_pdata; | |
327 | ||
328 | if (!pdata) | |
329 | return 0; | |
330 | ||
331 | ldo_pdata = &pdata->ldo[ldo]; | |
332 | ||
333 | if (!ldo_pdata->init_data) | |
334 | return 0; | |
335 | ||
336 | return ldo_pdata->init_data->num_consumer_supplies != 0; | |
337 | } | |
338 | #else | |
339 | static int wm8994_ldo_in_use(struct wm8994_pdata *pdata, int ldo) | |
340 | { | |
341 | return 0; | |
342 | } | |
343 | #endif | |
344 | ||
345 | /* | |
346 | * Instantiate the generic non-control parts of the device. | |
347 | */ | |
559e0df6 | 348 | static int wm8994_device_init(struct wm8994 *wm8994, int irq) |
9e501086 MB |
349 | { |
350 | struct wm8994_pdata *pdata = wm8994->dev->platform_data; | |
559e0df6 | 351 | const char *devname; |
9e501086 MB |
352 | int ret, i; |
353 | ||
354 | mutex_init(&wm8994->io_lock); | |
355 | dev_set_drvdata(wm8994->dev, wm8994); | |
356 | ||
357 | /* Add the on-chip regulators first for bootstrapping */ | |
358 | ret = mfd_add_devices(wm8994->dev, -1, | |
359 | wm8994_regulator_devs, | |
360 | ARRAY_SIZE(wm8994_regulator_devs), | |
361 | NULL, 0); | |
362 | if (ret != 0) { | |
363 | dev_err(wm8994->dev, "Failed to add children: %d\n", ret); | |
364 | goto err; | |
365 | } | |
366 | ||
559e0df6 MB |
367 | switch (wm8994->type) { |
368 | case WM8994: | |
369 | wm8994->num_supplies = ARRAY_SIZE(wm8994_main_supplies); | |
370 | break; | |
371 | case WM8958: | |
372 | wm8994->num_supplies = ARRAY_SIZE(wm8958_main_supplies); | |
373 | break; | |
374 | default: | |
375 | BUG(); | |
376 | return -EINVAL; | |
377 | } | |
378 | ||
9e501086 | 379 | wm8994->supplies = kzalloc(sizeof(struct regulator_bulk_data) * |
559e0df6 | 380 | wm8994->num_supplies, |
9e501086 | 381 | GFP_KERNEL); |
fccbd21f AL |
382 | if (!wm8994->supplies) { |
383 | ret = -ENOMEM; | |
9e501086 | 384 | goto err; |
fccbd21f | 385 | } |
9e501086 | 386 | |
559e0df6 MB |
387 | switch (wm8994->type) { |
388 | case WM8994: | |
389 | for (i = 0; i < ARRAY_SIZE(wm8994_main_supplies); i++) | |
390 | wm8994->supplies[i].supply = wm8994_main_supplies[i]; | |
391 | break; | |
392 | case WM8958: | |
393 | for (i = 0; i < ARRAY_SIZE(wm8958_main_supplies); i++) | |
394 | wm8994->supplies[i].supply = wm8958_main_supplies[i]; | |
395 | break; | |
396 | default: | |
397 | BUG(); | |
398 | return -EINVAL; | |
399 | } | |
400 | ||
401 | ret = regulator_bulk_get(wm8994->dev, wm8994->num_supplies, | |
9e501086 MB |
402 | wm8994->supplies); |
403 | if (ret != 0) { | |
404 | dev_err(wm8994->dev, "Failed to get supplies: %d\n", ret); | |
7731074a | 405 | goto err_supplies; |
9e501086 MB |
406 | } |
407 | ||
559e0df6 | 408 | ret = regulator_bulk_enable(wm8994->num_supplies, |
9e501086 MB |
409 | wm8994->supplies); |
410 | if (ret != 0) { | |
411 | dev_err(wm8994->dev, "Failed to enable supplies: %d\n", ret); | |
7731074a | 412 | goto err_get; |
9e501086 MB |
413 | } |
414 | ||
415 | ret = wm8994_reg_read(wm8994, WM8994_SOFTWARE_RESET); | |
416 | if (ret < 0) { | |
417 | dev_err(wm8994->dev, "Failed to read ID register\n"); | |
418 | goto err_enable; | |
419 | } | |
559e0df6 MB |
420 | switch (ret) { |
421 | case 0x8994: | |
422 | devname = "WM8994"; | |
423 | if (wm8994->type != WM8994) | |
424 | dev_warn(wm8994->dev, "Device registered as type %d\n", | |
425 | wm8994->type); | |
426 | wm8994->type = WM8994; | |
427 | break; | |
428 | case 0x8958: | |
429 | devname = "WM8958"; | |
430 | if (wm8994->type != WM8958) | |
431 | dev_warn(wm8994->dev, "Device registered as type %d\n", | |
432 | wm8994->type); | |
433 | wm8994->type = WM8958; | |
434 | break; | |
435 | default: | |
9e501086 MB |
436 | dev_err(wm8994->dev, "Device is not a WM8994, ID is %x\n", |
437 | ret); | |
438 | ret = -EINVAL; | |
439 | goto err_enable; | |
440 | } | |
441 | ||
442 | ret = wm8994_reg_read(wm8994, WM8994_CHIP_REVISION); | |
443 | if (ret < 0) { | |
444 | dev_err(wm8994->dev, "Failed to read revision register: %d\n", | |
445 | ret); | |
446 | goto err_enable; | |
447 | } | |
448 | ||
449 | switch (ret) { | |
450 | case 0: | |
451 | case 1: | |
559e0df6 MB |
452 | if (wm8994->type == WM8994) |
453 | dev_warn(wm8994->dev, | |
454 | "revision %c not fully supported\n", | |
455 | 'A' + ret); | |
9e501086 MB |
456 | break; |
457 | default: | |
9e501086 MB |
458 | break; |
459 | } | |
460 | ||
559e0df6 | 461 | dev_info(wm8994->dev, "%s revision %c\n", devname, 'A' + ret); |
9e501086 MB |
462 | |
463 | if (pdata) { | |
c9fbf7e0 | 464 | wm8994->irq_base = pdata->irq_base; |
9e501086 MB |
465 | wm8994->gpio_base = pdata->gpio_base; |
466 | ||
467 | /* GPIO configuration is only applied if it's non-zero */ | |
468 | for (i = 0; i < ARRAY_SIZE(pdata->gpio_defaults); i++) { | |
469 | if (pdata->gpio_defaults[i]) { | |
470 | wm8994_set_bits(wm8994, WM8994_GPIO_1 + i, | |
471 | 0xffff, | |
472 | pdata->gpio_defaults[i]); | |
473 | } | |
474 | } | |
475 | } | |
476 | ||
477 | /* In some system designs where the regulators are not in use, | |
478 | * we can achieve a small reduction in leakage currents by | |
479 | * floating LDO outputs. This bit makes no difference if the | |
480 | * LDOs are enabled, it only affects cases where the LDOs were | |
481 | * in operation and are then disabled. | |
482 | */ | |
483 | for (i = 0; i < WM8994_NUM_LDO_REGS; i++) { | |
484 | if (wm8994_ldo_in_use(pdata, i)) | |
485 | wm8994_set_bits(wm8994, WM8994_LDO_1 + i, | |
486 | WM8994_LDO1_DISCH, WM8994_LDO1_DISCH); | |
487 | else | |
488 | wm8994_set_bits(wm8994, WM8994_LDO_1 + i, | |
489 | WM8994_LDO1_DISCH, 0); | |
490 | } | |
491 | ||
c9fbf7e0 MB |
492 | wm8994_irq_init(wm8994); |
493 | ||
9e501086 MB |
494 | ret = mfd_add_devices(wm8994->dev, -1, |
495 | wm8994_devs, ARRAY_SIZE(wm8994_devs), | |
496 | NULL, 0); | |
497 | if (ret != 0) { | |
498 | dev_err(wm8994->dev, "Failed to add children: %d\n", ret); | |
c9fbf7e0 | 499 | goto err_irq; |
9e501086 MB |
500 | } |
501 | ||
d450f19e MB |
502 | pm_runtime_enable(wm8994->dev); |
503 | pm_runtime_resume(wm8994->dev); | |
504 | ||
9e501086 MB |
505 | return 0; |
506 | ||
c9fbf7e0 MB |
507 | err_irq: |
508 | wm8994_irq_exit(wm8994); | |
9e501086 | 509 | err_enable: |
559e0df6 | 510 | regulator_bulk_disable(wm8994->num_supplies, |
9e501086 MB |
511 | wm8994->supplies); |
512 | err_get: | |
559e0df6 | 513 | regulator_bulk_free(wm8994->num_supplies, wm8994->supplies); |
9e501086 MB |
514 | err_supplies: |
515 | kfree(wm8994->supplies); | |
516 | err: | |
517 | mfd_remove_devices(wm8994->dev); | |
518 | kfree(wm8994); | |
519 | return ret; | |
520 | } | |
521 | ||
522 | static void wm8994_device_exit(struct wm8994 *wm8994) | |
523 | { | |
d450f19e | 524 | pm_runtime_disable(wm8994->dev); |
9e501086 | 525 | mfd_remove_devices(wm8994->dev); |
c9fbf7e0 | 526 | wm8994_irq_exit(wm8994); |
559e0df6 | 527 | regulator_bulk_disable(wm8994->num_supplies, |
9e501086 | 528 | wm8994->supplies); |
559e0df6 | 529 | regulator_bulk_free(wm8994->num_supplies, wm8994->supplies); |
9e501086 MB |
530 | kfree(wm8994->supplies); |
531 | kfree(wm8994); | |
532 | } | |
533 | ||
534 | static int wm8994_i2c_read_device(struct wm8994 *wm8994, unsigned short reg, | |
535 | int bytes, void *dest) | |
536 | { | |
537 | struct i2c_client *i2c = wm8994->control_data; | |
538 | int ret; | |
539 | u16 r = cpu_to_be16(reg); | |
540 | ||
541 | ret = i2c_master_send(i2c, (unsigned char *)&r, 2); | |
542 | if (ret < 0) | |
543 | return ret; | |
544 | if (ret != 2) | |
545 | return -EIO; | |
546 | ||
547 | ret = i2c_master_recv(i2c, dest, bytes); | |
548 | if (ret < 0) | |
549 | return ret; | |
550 | if (ret != bytes) | |
551 | return -EIO; | |
552 | return 0; | |
553 | } | |
554 | ||
555 | /* Currently we allocate the write buffer on the stack; this is OK for | |
556 | * small writes - if we need to do large writes this will need to be | |
557 | * revised. | |
558 | */ | |
559 | static int wm8994_i2c_write_device(struct wm8994 *wm8994, unsigned short reg, | |
560 | int bytes, void *src) | |
561 | { | |
562 | struct i2c_client *i2c = wm8994->control_data; | |
563 | unsigned char msg[bytes + 2]; | |
564 | int ret; | |
565 | ||
566 | reg = cpu_to_be16(reg); | |
567 | memcpy(&msg[0], ®, 2); | |
568 | memcpy(&msg[2], src, bytes); | |
569 | ||
570 | ret = i2c_master_send(i2c, msg, bytes + 2); | |
571 | if (ret < 0) | |
572 | return ret; | |
573 | if (ret < bytes + 2) | |
574 | return -EIO; | |
575 | ||
576 | return 0; | |
577 | } | |
578 | ||
579 | static int wm8994_i2c_probe(struct i2c_client *i2c, | |
580 | const struct i2c_device_id *id) | |
581 | { | |
582 | struct wm8994 *wm8994; | |
583 | ||
584 | wm8994 = kzalloc(sizeof(struct wm8994), GFP_KERNEL); | |
d0a11693 | 585 | if (wm8994 == NULL) |
9e501086 | 586 | return -ENOMEM; |
9e501086 MB |
587 | |
588 | i2c_set_clientdata(i2c, wm8994); | |
589 | wm8994->dev = &i2c->dev; | |
590 | wm8994->control_data = i2c; | |
591 | wm8994->read_dev = wm8994_i2c_read_device; | |
592 | wm8994->write_dev = wm8994_i2c_write_device; | |
c9fbf7e0 | 593 | wm8994->irq = i2c->irq; |
559e0df6 | 594 | wm8994->type = id->driver_data; |
9e501086 | 595 | |
559e0df6 | 596 | return wm8994_device_init(wm8994, i2c->irq); |
9e501086 MB |
597 | } |
598 | ||
599 | static int wm8994_i2c_remove(struct i2c_client *i2c) | |
600 | { | |
601 | struct wm8994 *wm8994 = i2c_get_clientdata(i2c); | |
602 | ||
603 | wm8994_device_exit(wm8994); | |
604 | ||
605 | return 0; | |
606 | } | |
607 | ||
9e501086 | 608 | static const struct i2c_device_id wm8994_i2c_id[] = { |
559e0df6 MB |
609 | { "wm8994", WM8994 }, |
610 | { "wm8958", WM8958 }, | |
9e501086 MB |
611 | { } |
612 | }; | |
613 | MODULE_DEVICE_TABLE(i2c, wm8994_i2c_id); | |
614 | ||
d450f19e MB |
615 | UNIVERSAL_DEV_PM_OPS(wm8994_pm_ops, wm8994_suspend, wm8994_resume, NULL); |
616 | ||
9e501086 MB |
617 | static struct i2c_driver wm8994_i2c_driver = { |
618 | .driver = { | |
d450f19e MB |
619 | .name = "wm8994", |
620 | .owner = THIS_MODULE, | |
621 | .pm = &wm8994_pm_ops, | |
9e501086 MB |
622 | }, |
623 | .probe = wm8994_i2c_probe, | |
624 | .remove = wm8994_i2c_remove, | |
9e501086 MB |
625 | .id_table = wm8994_i2c_id, |
626 | }; | |
627 | ||
628 | static int __init wm8994_i2c_init(void) | |
629 | { | |
630 | int ret; | |
631 | ||
632 | ret = i2c_add_driver(&wm8994_i2c_driver); | |
633 | if (ret != 0) | |
634 | pr_err("Failed to register wm8994 I2C driver: %d\n", ret); | |
635 | ||
636 | return ret; | |
637 | } | |
638 | module_init(wm8994_i2c_init); | |
639 | ||
640 | static void __exit wm8994_i2c_exit(void) | |
641 | { | |
642 | i2c_del_driver(&wm8994_i2c_driver); | |
643 | } | |
644 | module_exit(wm8994_i2c_exit); | |
645 | ||
646 | MODULE_DESCRIPTION("Core support for the WM8994 audio CODEC"); | |
647 | MODULE_LICENSE("GPL"); | |
648 | MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); |