]>
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> | |
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++) { | |
9e501086 | 43 | dev_vdbg(wm8994->dev, "Read %04x from R%d(0x%x)\n", |
316b6cc0 | 44 | be16_to_cpu(buf[i]), reg + i, reg + i); |
9e501086 MB |
45 | } |
46 | ||
47 | return 0; | |
48 | } | |
49 | ||
50 | /** | |
51 | * wm8994_reg_read: Read a single WM8994 register. | |
52 | * | |
53 | * @wm8994: Device to read from. | |
54 | * @reg: Register to read. | |
55 | */ | |
56 | int wm8994_reg_read(struct wm8994 *wm8994, unsigned short reg) | |
57 | { | |
58 | unsigned short val; | |
59 | int ret; | |
60 | ||
61 | mutex_lock(&wm8994->io_lock); | |
62 | ||
63 | ret = wm8994_read(wm8994, reg, 2, &val); | |
64 | ||
65 | mutex_unlock(&wm8994->io_lock); | |
66 | ||
67 | if (ret < 0) | |
68 | return ret; | |
69 | else | |
316b6cc0 | 70 | return be16_to_cpu(val); |
9e501086 MB |
71 | } |
72 | EXPORT_SYMBOL_GPL(wm8994_reg_read); | |
73 | ||
74 | /** | |
75 | * wm8994_bulk_read: Read multiple WM8994 registers | |
76 | * | |
77 | * @wm8994: Device to read from | |
78 | * @reg: First register | |
79 | * @count: Number of registers | |
316b6cc0 | 80 | * @buf: Buffer to fill. The data will be returned big endian. |
9e501086 MB |
81 | */ |
82 | int wm8994_bulk_read(struct wm8994 *wm8994, unsigned short reg, | |
83 | int count, u16 *buf) | |
84 | { | |
85 | int ret; | |
86 | ||
87 | mutex_lock(&wm8994->io_lock); | |
88 | ||
89 | ret = wm8994_read(wm8994, reg, count * 2, buf); | |
90 | ||
91 | mutex_unlock(&wm8994->io_lock); | |
92 | ||
93 | return ret; | |
94 | } | |
95 | EXPORT_SYMBOL_GPL(wm8994_bulk_read); | |
96 | ||
97 | static int wm8994_write(struct wm8994 *wm8994, unsigned short reg, | |
07e73fbb | 98 | int bytes, const void *src) |
9e501086 | 99 | { |
07e73fbb | 100 | const u16 *buf = src; |
9e501086 MB |
101 | int i; |
102 | ||
103 | BUG_ON(bytes % 2); | |
104 | BUG_ON(bytes <= 0); | |
105 | ||
106 | for (i = 0; i < bytes / 2; i++) { | |
107 | dev_vdbg(wm8994->dev, "Write %04x to R%d(0x%x)\n", | |
4277163c | 108 | be16_to_cpu(buf[i]), reg + i, reg + i); |
9e501086 MB |
109 | } |
110 | ||
111 | return wm8994->write_dev(wm8994, reg, bytes, src); | |
112 | } | |
113 | ||
114 | /** | |
115 | * wm8994_reg_write: Write a single WM8994 register. | |
116 | * | |
117 | * @wm8994: Device to write to. | |
118 | * @reg: Register to write to. | |
119 | * @val: Value to write. | |
120 | */ | |
121 | int wm8994_reg_write(struct wm8994 *wm8994, unsigned short reg, | |
122 | unsigned short val) | |
123 | { | |
124 | int ret; | |
125 | ||
4277163c MB |
126 | val = cpu_to_be16(val); |
127 | ||
9e501086 MB |
128 | mutex_lock(&wm8994->io_lock); |
129 | ||
130 | ret = wm8994_write(wm8994, reg, 2, &val); | |
131 | ||
132 | mutex_unlock(&wm8994->io_lock); | |
133 | ||
134 | return ret; | |
135 | } | |
136 | EXPORT_SYMBOL_GPL(wm8994_reg_write); | |
137 | ||
e93c5387 MB |
138 | /** |
139 | * wm8994_bulk_write: Write multiple WM8994 registers | |
140 | * | |
141 | * @wm8994: Device to write to | |
142 | * @reg: First register | |
143 | * @count: Number of registers | |
4277163c | 144 | * @buf: Buffer to write from. Data must be big-endian formatted. |
e93c5387 MB |
145 | */ |
146 | int wm8994_bulk_write(struct wm8994 *wm8994, unsigned short reg, | |
07e73fbb | 147 | int count, const u16 *buf) |
e93c5387 MB |
148 | { |
149 | int ret; | |
150 | ||
151 | mutex_lock(&wm8994->io_lock); | |
152 | ||
153 | ret = wm8994_write(wm8994, reg, count * 2, buf); | |
154 | ||
155 | mutex_unlock(&wm8994->io_lock); | |
156 | ||
157 | return ret; | |
158 | } | |
159 | EXPORT_SYMBOL_GPL(wm8994_bulk_write); | |
160 | ||
9e501086 MB |
161 | /** |
162 | * wm8994_set_bits: Set the value of a bitfield in a WM8994 register | |
163 | * | |
164 | * @wm8994: Device to write to. | |
165 | * @reg: Register to write to. | |
166 | * @mask: Mask of bits to set. | |
167 | * @val: Value to set (unshifted) | |
168 | */ | |
169 | int wm8994_set_bits(struct wm8994 *wm8994, unsigned short reg, | |
170 | unsigned short mask, unsigned short val) | |
171 | { | |
172 | int ret; | |
173 | u16 r; | |
174 | ||
175 | mutex_lock(&wm8994->io_lock); | |
176 | ||
177 | ret = wm8994_read(wm8994, reg, 2, &r); | |
178 | if (ret < 0) | |
179 | goto out; | |
180 | ||
316b6cc0 MB |
181 | r = be16_to_cpu(r); |
182 | ||
9e501086 MB |
183 | r &= ~mask; |
184 | r |= val; | |
185 | ||
4277163c MB |
186 | r = cpu_to_be16(r); |
187 | ||
9e501086 MB |
188 | ret = wm8994_write(wm8994, reg, 2, &r); |
189 | ||
190 | out: | |
191 | mutex_unlock(&wm8994->io_lock); | |
192 | ||
193 | return ret; | |
194 | } | |
195 | EXPORT_SYMBOL_GPL(wm8994_set_bits); | |
196 | ||
197 | static struct mfd_cell wm8994_regulator_devs[] = { | |
d450f19e MB |
198 | { |
199 | .name = "wm8994-ldo", | |
200 | .id = 1, | |
201 | .pm_runtime_no_callbacks = true, | |
202 | }, | |
203 | { | |
204 | .name = "wm8994-ldo", | |
205 | .id = 2, | |
206 | .pm_runtime_no_callbacks = true, | |
207 | }, | |
9e501086 MB |
208 | }; |
209 | ||
c9fbf7e0 MB |
210 | static struct resource wm8994_codec_resources[] = { |
211 | { | |
212 | .start = WM8994_IRQ_TEMP_SHUT, | |
213 | .end = WM8994_IRQ_TEMP_WARN, | |
214 | .flags = IORESOURCE_IRQ, | |
215 | }, | |
216 | }; | |
217 | ||
218 | static struct resource wm8994_gpio_resources[] = { | |
219 | { | |
220 | .start = WM8994_IRQ_GPIO(1), | |
221 | .end = WM8994_IRQ_GPIO(11), | |
222 | .flags = IORESOURCE_IRQ, | |
223 | }, | |
224 | }; | |
225 | ||
9e501086 | 226 | static struct mfd_cell wm8994_devs[] = { |
c9fbf7e0 MB |
227 | { |
228 | .name = "wm8994-codec", | |
229 | .num_resources = ARRAY_SIZE(wm8994_codec_resources), | |
230 | .resources = wm8994_codec_resources, | |
231 | }, | |
232 | ||
233 | { | |
234 | .name = "wm8994-gpio", | |
235 | .num_resources = ARRAY_SIZE(wm8994_gpio_resources), | |
236 | .resources = wm8994_gpio_resources, | |
d450f19e | 237 | .pm_runtime_no_callbacks = true, |
c9fbf7e0 | 238 | }, |
9e501086 MB |
239 | }; |
240 | ||
241 | /* | |
242 | * Supplies for the main bulk of CODEC; the LDO supplies are ignored | |
243 | * and should be handled via the standard regulator API supply | |
244 | * management. | |
245 | */ | |
246 | static const char *wm8994_main_supplies[] = { | |
247 | "DBVDD", | |
248 | "DCVDD", | |
249 | "AVDD1", | |
250 | "AVDD2", | |
251 | "CPVDD", | |
252 | "SPKVDD1", | |
253 | "SPKVDD2", | |
254 | }; | |
255 | ||
559e0df6 MB |
256 | static const char *wm8958_main_supplies[] = { |
257 | "DBVDD1", | |
258 | "DBVDD2", | |
259 | "DBVDD3", | |
260 | "DCVDD", | |
261 | "AVDD1", | |
262 | "AVDD2", | |
263 | "CPVDD", | |
264 | "SPKVDD1", | |
265 | "SPKVDD2", | |
266 | }; | |
267 | ||
9e501086 | 268 | #ifdef CONFIG_PM |
d450f19e | 269 | static int wm8994_suspend(struct device *dev) |
9e501086 MB |
270 | { |
271 | struct wm8994 *wm8994 = dev_get_drvdata(dev); | |
272 | int ret; | |
273 | ||
77bd70e9 MB |
274 | /* Don't actually go through with the suspend if the CODEC is |
275 | * still active (eg, for audio passthrough from CP. */ | |
276 | ret = wm8994_reg_read(wm8994, WM8994_POWER_MANAGEMENT_1); | |
277 | if (ret < 0) { | |
278 | dev_err(dev, "Failed to read power status: %d\n", ret); | |
279 | } else if (ret & WM8994_VMID_SEL_MASK) { | |
280 | dev_dbg(dev, "CODEC still active, ignoring suspend\n"); | |
281 | return 0; | |
282 | } | |
283 | ||
9e501086 MB |
284 | /* GPIO configuration state is saved here since we may be configuring |
285 | * the GPIO alternate functions even if we're not using the gpiolib | |
286 | * driver for them. | |
287 | */ | |
288 | ret = wm8994_read(wm8994, WM8994_GPIO_1, WM8994_NUM_GPIO_REGS * 2, | |
289 | &wm8994->gpio_regs); | |
290 | if (ret < 0) | |
291 | dev_err(dev, "Failed to save GPIO registers: %d\n", ret); | |
292 | ||
293 | /* For similar reasons we also stash the regulator states */ | |
294 | ret = wm8994_read(wm8994, WM8994_LDO_1, WM8994_NUM_LDO_REGS * 2, | |
295 | &wm8994->ldo_regs); | |
296 | if (ret < 0) | |
297 | dev_err(dev, "Failed to save LDO registers: %d\n", ret); | |
298 | ||
f40dff9e MB |
299 | /* Explicitly put the device into reset in case regulators |
300 | * don't get disabled in order to ensure consistent restart. | |
301 | */ | |
302 | wm8994_reg_write(wm8994, WM8994_SOFTWARE_RESET, 0x8994); | |
303 | ||
77bd70e9 MB |
304 | wm8994->suspended = true; |
305 | ||
559e0df6 | 306 | ret = regulator_bulk_disable(wm8994->num_supplies, |
9e501086 MB |
307 | wm8994->supplies); |
308 | if (ret != 0) { | |
309 | dev_err(dev, "Failed to disable supplies: %d\n", ret); | |
310 | return ret; | |
311 | } | |
312 | ||
313 | return 0; | |
314 | } | |
315 | ||
d450f19e | 316 | static int wm8994_resume(struct device *dev) |
9e501086 MB |
317 | { |
318 | struct wm8994 *wm8994 = dev_get_drvdata(dev); | |
319 | int ret; | |
320 | ||
77bd70e9 MB |
321 | /* We may have lied to the PM core about suspending */ |
322 | if (!wm8994->suspended) | |
323 | return 0; | |
324 | ||
559e0df6 | 325 | ret = regulator_bulk_enable(wm8994->num_supplies, |
9e501086 MB |
326 | wm8994->supplies); |
327 | if (ret != 0) { | |
328 | dev_err(dev, "Failed to enable supplies: %d\n", ret); | |
329 | return ret; | |
330 | } | |
331 | ||
c9fbf7e0 MB |
332 | ret = wm8994_write(wm8994, WM8994_INTERRUPT_STATUS_1_MASK, |
333 | WM8994_NUM_IRQ_REGS * 2, &wm8994->irq_masks_cur); | |
334 | if (ret < 0) | |
335 | dev_err(dev, "Failed to restore interrupt masks: %d\n", ret); | |
336 | ||
9e501086 MB |
337 | ret = wm8994_write(wm8994, WM8994_LDO_1, WM8994_NUM_LDO_REGS * 2, |
338 | &wm8994->ldo_regs); | |
339 | if (ret < 0) | |
340 | dev_err(dev, "Failed to restore LDO registers: %d\n", ret); | |
341 | ||
342 | ret = wm8994_write(wm8994, WM8994_GPIO_1, WM8994_NUM_GPIO_REGS * 2, | |
343 | &wm8994->gpio_regs); | |
344 | if (ret < 0) | |
345 | dev_err(dev, "Failed to restore GPIO registers: %d\n", ret); | |
346 | ||
77bd70e9 MB |
347 | wm8994->suspended = false; |
348 | ||
9e501086 MB |
349 | return 0; |
350 | } | |
351 | #endif | |
352 | ||
353 | #ifdef CONFIG_REGULATOR | |
354 | static int wm8994_ldo_in_use(struct wm8994_pdata *pdata, int ldo) | |
355 | { | |
356 | struct wm8994_ldo_pdata *ldo_pdata; | |
357 | ||
358 | if (!pdata) | |
359 | return 0; | |
360 | ||
361 | ldo_pdata = &pdata->ldo[ldo]; | |
362 | ||
363 | if (!ldo_pdata->init_data) | |
364 | return 0; | |
365 | ||
366 | return ldo_pdata->init_data->num_consumer_supplies != 0; | |
367 | } | |
368 | #else | |
369 | static int wm8994_ldo_in_use(struct wm8994_pdata *pdata, int ldo) | |
370 | { | |
371 | return 0; | |
372 | } | |
373 | #endif | |
374 | ||
375 | /* | |
376 | * Instantiate the generic non-control parts of the device. | |
377 | */ | |
559e0df6 | 378 | static int wm8994_device_init(struct wm8994 *wm8994, int irq) |
9e501086 MB |
379 | { |
380 | struct wm8994_pdata *pdata = wm8994->dev->platform_data; | |
559e0df6 | 381 | const char *devname; |
9e501086 MB |
382 | int ret, i; |
383 | ||
384 | mutex_init(&wm8994->io_lock); | |
385 | dev_set_drvdata(wm8994->dev, wm8994); | |
386 | ||
387 | /* Add the on-chip regulators first for bootstrapping */ | |
388 | ret = mfd_add_devices(wm8994->dev, -1, | |
389 | wm8994_regulator_devs, | |
390 | ARRAY_SIZE(wm8994_regulator_devs), | |
391 | NULL, 0); | |
392 | if (ret != 0) { | |
393 | dev_err(wm8994->dev, "Failed to add children: %d\n", ret); | |
394 | goto err; | |
395 | } | |
396 | ||
559e0df6 MB |
397 | switch (wm8994->type) { |
398 | case WM8994: | |
399 | wm8994->num_supplies = ARRAY_SIZE(wm8994_main_supplies); | |
400 | break; | |
401 | case WM8958: | |
402 | wm8994->num_supplies = ARRAY_SIZE(wm8958_main_supplies); | |
403 | break; | |
404 | default: | |
405 | BUG(); | |
406 | return -EINVAL; | |
407 | } | |
408 | ||
9e501086 | 409 | wm8994->supplies = kzalloc(sizeof(struct regulator_bulk_data) * |
559e0df6 | 410 | wm8994->num_supplies, |
9e501086 | 411 | GFP_KERNEL); |
fccbd21f AL |
412 | if (!wm8994->supplies) { |
413 | ret = -ENOMEM; | |
9e501086 | 414 | goto err; |
fccbd21f | 415 | } |
9e501086 | 416 | |
559e0df6 MB |
417 | switch (wm8994->type) { |
418 | case WM8994: | |
419 | for (i = 0; i < ARRAY_SIZE(wm8994_main_supplies); i++) | |
420 | wm8994->supplies[i].supply = wm8994_main_supplies[i]; | |
421 | break; | |
422 | case WM8958: | |
423 | for (i = 0; i < ARRAY_SIZE(wm8958_main_supplies); i++) | |
424 | wm8994->supplies[i].supply = wm8958_main_supplies[i]; | |
425 | break; | |
426 | default: | |
427 | BUG(); | |
428 | return -EINVAL; | |
429 | } | |
430 | ||
431 | ret = regulator_bulk_get(wm8994->dev, wm8994->num_supplies, | |
9e501086 MB |
432 | wm8994->supplies); |
433 | if (ret != 0) { | |
434 | dev_err(wm8994->dev, "Failed to get supplies: %d\n", ret); | |
7731074a | 435 | goto err_supplies; |
9e501086 MB |
436 | } |
437 | ||
559e0df6 | 438 | ret = regulator_bulk_enable(wm8994->num_supplies, |
9e501086 MB |
439 | wm8994->supplies); |
440 | if (ret != 0) { | |
441 | dev_err(wm8994->dev, "Failed to enable supplies: %d\n", ret); | |
7731074a | 442 | goto err_get; |
9e501086 MB |
443 | } |
444 | ||
445 | ret = wm8994_reg_read(wm8994, WM8994_SOFTWARE_RESET); | |
446 | if (ret < 0) { | |
447 | dev_err(wm8994->dev, "Failed to read ID register\n"); | |
448 | goto err_enable; | |
449 | } | |
559e0df6 MB |
450 | switch (ret) { |
451 | case 0x8994: | |
452 | devname = "WM8994"; | |
453 | if (wm8994->type != WM8994) | |
454 | dev_warn(wm8994->dev, "Device registered as type %d\n", | |
455 | wm8994->type); | |
456 | wm8994->type = WM8994; | |
457 | break; | |
458 | case 0x8958: | |
459 | devname = "WM8958"; | |
460 | if (wm8994->type != WM8958) | |
461 | dev_warn(wm8994->dev, "Device registered as type %d\n", | |
462 | wm8994->type); | |
463 | wm8994->type = WM8958; | |
464 | break; | |
465 | default: | |
9e501086 MB |
466 | dev_err(wm8994->dev, "Device is not a WM8994, ID is %x\n", |
467 | ret); | |
468 | ret = -EINVAL; | |
469 | goto err_enable; | |
470 | } | |
471 | ||
472 | ret = wm8994_reg_read(wm8994, WM8994_CHIP_REVISION); | |
473 | if (ret < 0) { | |
474 | dev_err(wm8994->dev, "Failed to read revision register: %d\n", | |
475 | ret); | |
476 | goto err_enable; | |
477 | } | |
478 | ||
a2495bc7 MB |
479 | switch (wm8994->type) { |
480 | case WM8994: | |
481 | switch (ret) { | |
482 | case 0: | |
483 | case 1: | |
559e0df6 MB |
484 | dev_warn(wm8994->dev, |
485 | "revision %c not fully supported\n", | |
486 | 'A' + ret); | |
a2495bc7 MB |
487 | break; |
488 | default: | |
489 | break; | |
490 | } | |
9e501086 MB |
491 | break; |
492 | default: | |
9e501086 MB |
493 | break; |
494 | } | |
495 | ||
559e0df6 | 496 | dev_info(wm8994->dev, "%s revision %c\n", devname, 'A' + ret); |
9e501086 MB |
497 | |
498 | if (pdata) { | |
c9fbf7e0 | 499 | wm8994->irq_base = pdata->irq_base; |
9e501086 MB |
500 | wm8994->gpio_base = pdata->gpio_base; |
501 | ||
502 | /* GPIO configuration is only applied if it's non-zero */ | |
503 | for (i = 0; i < ARRAY_SIZE(pdata->gpio_defaults); i++) { | |
504 | if (pdata->gpio_defaults[i]) { | |
505 | wm8994_set_bits(wm8994, WM8994_GPIO_1 + i, | |
506 | 0xffff, | |
507 | pdata->gpio_defaults[i]); | |
508 | } | |
509 | } | |
510 | } | |
511 | ||
512 | /* In some system designs where the regulators are not in use, | |
513 | * we can achieve a small reduction in leakage currents by | |
514 | * floating LDO outputs. This bit makes no difference if the | |
515 | * LDOs are enabled, it only affects cases where the LDOs were | |
516 | * in operation and are then disabled. | |
517 | */ | |
518 | for (i = 0; i < WM8994_NUM_LDO_REGS; i++) { | |
519 | if (wm8994_ldo_in_use(pdata, i)) | |
520 | wm8994_set_bits(wm8994, WM8994_LDO_1 + i, | |
521 | WM8994_LDO1_DISCH, WM8994_LDO1_DISCH); | |
522 | else | |
523 | wm8994_set_bits(wm8994, WM8994_LDO_1 + i, | |
524 | WM8994_LDO1_DISCH, 0); | |
525 | } | |
526 | ||
c9fbf7e0 MB |
527 | wm8994_irq_init(wm8994); |
528 | ||
9e501086 MB |
529 | ret = mfd_add_devices(wm8994->dev, -1, |
530 | wm8994_devs, ARRAY_SIZE(wm8994_devs), | |
531 | NULL, 0); | |
532 | if (ret != 0) { | |
533 | dev_err(wm8994->dev, "Failed to add children: %d\n", ret); | |
c9fbf7e0 | 534 | goto err_irq; |
9e501086 MB |
535 | } |
536 | ||
d450f19e MB |
537 | pm_runtime_enable(wm8994->dev); |
538 | pm_runtime_resume(wm8994->dev); | |
539 | ||
9e501086 MB |
540 | return 0; |
541 | ||
c9fbf7e0 MB |
542 | err_irq: |
543 | wm8994_irq_exit(wm8994); | |
9e501086 | 544 | err_enable: |
559e0df6 | 545 | regulator_bulk_disable(wm8994->num_supplies, |
9e501086 MB |
546 | wm8994->supplies); |
547 | err_get: | |
559e0df6 | 548 | regulator_bulk_free(wm8994->num_supplies, wm8994->supplies); |
9e501086 MB |
549 | err_supplies: |
550 | kfree(wm8994->supplies); | |
551 | err: | |
552 | mfd_remove_devices(wm8994->dev); | |
553 | kfree(wm8994); | |
554 | return ret; | |
555 | } | |
556 | ||
557 | static void wm8994_device_exit(struct wm8994 *wm8994) | |
558 | { | |
d450f19e | 559 | pm_runtime_disable(wm8994->dev); |
9e501086 | 560 | mfd_remove_devices(wm8994->dev); |
c9fbf7e0 | 561 | wm8994_irq_exit(wm8994); |
559e0df6 | 562 | regulator_bulk_disable(wm8994->num_supplies, |
9e501086 | 563 | wm8994->supplies); |
559e0df6 | 564 | regulator_bulk_free(wm8994->num_supplies, wm8994->supplies); |
9e501086 MB |
565 | kfree(wm8994->supplies); |
566 | kfree(wm8994); | |
567 | } | |
568 | ||
569 | static int wm8994_i2c_read_device(struct wm8994 *wm8994, unsigned short reg, | |
570 | int bytes, void *dest) | |
571 | { | |
572 | struct i2c_client *i2c = wm8994->control_data; | |
573 | int ret; | |
574 | u16 r = cpu_to_be16(reg); | |
575 | ||
576 | ret = i2c_master_send(i2c, (unsigned char *)&r, 2); | |
577 | if (ret < 0) | |
578 | return ret; | |
579 | if (ret != 2) | |
580 | return -EIO; | |
581 | ||
582 | ret = i2c_master_recv(i2c, dest, bytes); | |
583 | if (ret < 0) | |
584 | return ret; | |
585 | if (ret != bytes) | |
586 | return -EIO; | |
587 | return 0; | |
588 | } | |
589 | ||
9e501086 | 590 | static int wm8994_i2c_write_device(struct wm8994 *wm8994, unsigned short reg, |
07e73fbb | 591 | int bytes, const void *src) |
9e501086 MB |
592 | { |
593 | struct i2c_client *i2c = wm8994->control_data; | |
334e9ab8 | 594 | struct i2c_msg xfer[2]; |
9e501086 MB |
595 | int ret; |
596 | ||
597 | reg = cpu_to_be16(reg); | |
9e501086 | 598 | |
334e9ab8 MB |
599 | xfer[0].addr = i2c->addr; |
600 | xfer[0].flags = 0; | |
601 | xfer[0].len = 2; | |
602 | xfer[0].buf = (char *)® | |
603 | ||
604 | xfer[1].addr = i2c->addr; | |
605 | xfer[1].flags = I2C_M_NOSTART; | |
606 | xfer[1].len = bytes; | |
607 | xfer[1].buf = (char *)src; | |
608 | ||
609 | ret = i2c_transfer(i2c->adapter, xfer, 2); | |
9e501086 MB |
610 | if (ret < 0) |
611 | return ret; | |
334e9ab8 | 612 | if (ret != 2) |
9e501086 MB |
613 | return -EIO; |
614 | ||
615 | return 0; | |
616 | } | |
617 | ||
618 | static int wm8994_i2c_probe(struct i2c_client *i2c, | |
619 | const struct i2c_device_id *id) | |
620 | { | |
621 | struct wm8994 *wm8994; | |
622 | ||
623 | wm8994 = kzalloc(sizeof(struct wm8994), GFP_KERNEL); | |
d0a11693 | 624 | if (wm8994 == NULL) |
9e501086 | 625 | return -ENOMEM; |
9e501086 MB |
626 | |
627 | i2c_set_clientdata(i2c, wm8994); | |
628 | wm8994->dev = &i2c->dev; | |
629 | wm8994->control_data = i2c; | |
630 | wm8994->read_dev = wm8994_i2c_read_device; | |
631 | wm8994->write_dev = wm8994_i2c_write_device; | |
c9fbf7e0 | 632 | wm8994->irq = i2c->irq; |
559e0df6 | 633 | wm8994->type = id->driver_data; |
9e501086 | 634 | |
559e0df6 | 635 | return wm8994_device_init(wm8994, i2c->irq); |
9e501086 MB |
636 | } |
637 | ||
638 | static int wm8994_i2c_remove(struct i2c_client *i2c) | |
639 | { | |
640 | struct wm8994 *wm8994 = i2c_get_clientdata(i2c); | |
641 | ||
642 | wm8994_device_exit(wm8994); | |
643 | ||
644 | return 0; | |
645 | } | |
646 | ||
9e501086 | 647 | static const struct i2c_device_id wm8994_i2c_id[] = { |
559e0df6 MB |
648 | { "wm8994", WM8994 }, |
649 | { "wm8958", WM8958 }, | |
9e501086 MB |
650 | { } |
651 | }; | |
652 | MODULE_DEVICE_TABLE(i2c, wm8994_i2c_id); | |
653 | ||
aad34310 MB |
654 | static UNIVERSAL_DEV_PM_OPS(wm8994_pm_ops, wm8994_suspend, wm8994_resume, |
655 | NULL); | |
d450f19e | 656 | |
9e501086 MB |
657 | static struct i2c_driver wm8994_i2c_driver = { |
658 | .driver = { | |
d450f19e MB |
659 | .name = "wm8994", |
660 | .owner = THIS_MODULE, | |
661 | .pm = &wm8994_pm_ops, | |
9e501086 MB |
662 | }, |
663 | .probe = wm8994_i2c_probe, | |
664 | .remove = wm8994_i2c_remove, | |
9e501086 MB |
665 | .id_table = wm8994_i2c_id, |
666 | }; | |
667 | ||
668 | static int __init wm8994_i2c_init(void) | |
669 | { | |
670 | int ret; | |
671 | ||
672 | ret = i2c_add_driver(&wm8994_i2c_driver); | |
673 | if (ret != 0) | |
674 | pr_err("Failed to register wm8994 I2C driver: %d\n", ret); | |
675 | ||
676 | return ret; | |
677 | } | |
678 | module_init(wm8994_i2c_init); | |
679 | ||
680 | static void __exit wm8994_i2c_exit(void) | |
681 | { | |
682 | i2c_del_driver(&wm8994_i2c_driver); | |
683 | } | |
684 | module_exit(wm8994_i2c_exit); | |
685 | ||
686 | MODULE_DESCRIPTION("Core support for the WM8994 audio CODEC"); | |
687 | MODULE_LICENSE("GPL"); | |
688 | MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); |