Commit | Line | Data |
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992bee40 IL |
1 | /* |
2 | * wm8741.c -- WM8741 ALSA SoC Audio driver | |
3 | * | |
4 | * Copyright 2010 Wolfson Microelectronics plc | |
5 | * | |
6 | * Author: Ian Lartey <ian@opensource.wolfsonmicro.com> | |
7 | * | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License version 2 as | |
11 | * published by the Free Software Foundation. | |
12 | */ | |
13 | ||
14 | #include <linux/module.h> | |
15 | #include <linux/moduleparam.h> | |
16 | #include <linux/init.h> | |
17 | #include <linux/delay.h> | |
18 | #include <linux/pm.h> | |
19 | #include <linux/i2c.h> | |
20 | #include <linux/platform_device.h> | |
21 | #include <linux/regulator/consumer.h> | |
22 | #include <linux/slab.h> | |
23 | #include <sound/core.h> | |
24 | #include <sound/pcm.h> | |
25 | #include <sound/pcm_params.h> | |
26 | #include <sound/soc.h> | |
27 | #include <sound/soc-dapm.h> | |
28 | #include <sound/initval.h> | |
29 | #include <sound/tlv.h> | |
30 | ||
31 | #include "wm8741.h" | |
32 | ||
992bee40 IL |
33 | #define WM8741_NUM_SUPPLIES 2 |
34 | static const char *wm8741_supply_names[WM8741_NUM_SUPPLIES] = { | |
35 | "AVDD", | |
36 | "DVDD", | |
37 | }; | |
38 | ||
3fe4a5ee | 39 | #define WM8741_NUM_RATES 6 |
992bee40 IL |
40 | |
41 | /* codec private data */ | |
42 | struct wm8741_priv { | |
f0fba2ad | 43 | enum snd_soc_control_type control_type; |
992bee40 IL |
44 | u16 reg_cache[WM8741_REGISTER_COUNT]; |
45 | struct regulator_bulk_data supplies[WM8741_NUM_SUPPLIES]; | |
46 | unsigned int sysclk; | |
3fe4a5ee | 47 | struct snd_pcm_hw_constraint_list *sysclk_constraints; |
992bee40 IL |
48 | }; |
49 | ||
50 | static const u16 wm8741_reg_defaults[WM8741_REGISTER_COUNT] = { | |
51 | 0x0000, /* R0 - DACLLSB Attenuation */ | |
52 | 0x0000, /* R1 - DACLMSB Attenuation */ | |
53 | 0x0000, /* R2 - DACRLSB Attenuation */ | |
54 | 0x0000, /* R3 - DACRMSB Attenuation */ | |
55 | 0x0000, /* R4 - Volume Control */ | |
56 | 0x000A, /* R5 - Format Control */ | |
57 | 0x0000, /* R6 - Filter Control */ | |
58 | 0x0000, /* R7 - Mode Control 1 */ | |
59 | 0x0002, /* R8 - Mode Control 2 */ | |
60 | 0x0000, /* R9 - Reset */ | |
61 | 0x0002, /* R32 - ADDITONAL_CONTROL_1 */ | |
62 | }; | |
63 | ||
64 | ||
65 | static int wm8741_reset(struct snd_soc_codec *codec) | |
66 | { | |
67 | return snd_soc_write(codec, WM8741_RESET, 0); | |
68 | } | |
69 | ||
70 | static const DECLARE_TLV_DB_SCALE(dac_tlv_fine, -12700, 13, 0); | |
71 | static const DECLARE_TLV_DB_SCALE(dac_tlv, -12700, 400, 0); | |
72 | ||
73 | static const struct snd_kcontrol_new wm8741_snd_controls[] = { | |
74 | SOC_DOUBLE_R_TLV("Fine Playback Volume", WM8741_DACLLSB_ATTENUATION, | |
75 | WM8741_DACRLSB_ATTENUATION, 1, 255, 1, dac_tlv_fine), | |
76 | SOC_DOUBLE_R_TLV("Playback Volume", WM8741_DACLMSB_ATTENUATION, | |
77 | WM8741_DACRMSB_ATTENUATION, 0, 511, 1, dac_tlv), | |
78 | }; | |
79 | ||
80 | static const struct snd_soc_dapm_widget wm8741_dapm_widgets[] = { | |
81 | SND_SOC_DAPM_DAC("DACL", "Playback", SND_SOC_NOPM, 0, 0), | |
82 | SND_SOC_DAPM_DAC("DACR", "Playback", SND_SOC_NOPM, 0, 0), | |
83 | SND_SOC_DAPM_OUTPUT("VOUTLP"), | |
84 | SND_SOC_DAPM_OUTPUT("VOUTLN"), | |
85 | SND_SOC_DAPM_OUTPUT("VOUTRP"), | |
86 | SND_SOC_DAPM_OUTPUT("VOUTRN"), | |
87 | }; | |
88 | ||
89 | static const struct snd_soc_dapm_route intercon[] = { | |
90 | { "VOUTLP", NULL, "DACL" }, | |
91 | { "VOUTLN", NULL, "DACL" }, | |
92 | { "VOUTRP", NULL, "DACR" }, | |
93 | { "VOUTRN", NULL, "DACR" }, | |
94 | }; | |
95 | ||
96 | static int wm8741_add_widgets(struct snd_soc_codec *codec) | |
97 | { | |
98 | snd_soc_dapm_new_controls(codec, wm8741_dapm_widgets, | |
99 | ARRAY_SIZE(wm8741_dapm_widgets)); | |
100 | ||
101 | snd_soc_dapm_add_routes(codec, intercon, ARRAY_SIZE(intercon)); | |
102 | ||
103 | return 0; | |
104 | } | |
105 | ||
106 | static struct { | |
107 | int value; | |
108 | int ratio; | |
109 | } lrclk_ratios[WM8741_NUM_RATES] = { | |
3fe4a5ee IL |
110 | { 1, 128 }, |
111 | { 2, 192 }, | |
112 | { 3, 256 }, | |
113 | { 4, 384 }, | |
114 | { 5, 512 }, | |
115 | { 6, 768 }, | |
116 | }; | |
117 | ||
118 | static unsigned int rates_11289[] = { | |
119 | 44100, 88235, | |
120 | }; | |
121 | ||
122 | static struct snd_pcm_hw_constraint_list constraints_11289 = { | |
123 | .count = ARRAY_SIZE(rates_11289), | |
124 | .list = rates_11289, | |
125 | }; | |
126 | ||
127 | static unsigned int rates_12288[] = { | |
128 | 32000, 48000, 96000, | |
129 | }; | |
130 | ||
131 | static struct snd_pcm_hw_constraint_list constraints_12288 = { | |
132 | .count = ARRAY_SIZE(rates_12288), | |
133 | .list = rates_12288, | |
134 | }; | |
135 | ||
136 | static unsigned int rates_16384[] = { | |
137 | 32000, | |
138 | }; | |
139 | ||
140 | static struct snd_pcm_hw_constraint_list constraints_16384 = { | |
141 | .count = ARRAY_SIZE(rates_16384), | |
142 | .list = rates_16384, | |
143 | }; | |
144 | ||
145 | static unsigned int rates_16934[] = { | |
146 | 44100, 88235, | |
147 | }; | |
148 | ||
149 | static struct snd_pcm_hw_constraint_list constraints_16934 = { | |
150 | .count = ARRAY_SIZE(rates_16934), | |
151 | .list = rates_16934, | |
152 | }; | |
153 | ||
154 | static unsigned int rates_18432[] = { | |
155 | 48000, 96000, | |
156 | }; | |
157 | ||
158 | static struct snd_pcm_hw_constraint_list constraints_18432 = { | |
159 | .count = ARRAY_SIZE(rates_18432), | |
160 | .list = rates_18432, | |
161 | }; | |
162 | ||
163 | static unsigned int rates_22579[] = { | |
164 | 44100, 88235, 1764000 | |
165 | }; | |
166 | ||
167 | static struct snd_pcm_hw_constraint_list constraints_22579 = { | |
168 | .count = ARRAY_SIZE(rates_22579), | |
169 | .list = rates_22579, | |
170 | }; | |
171 | ||
172 | static unsigned int rates_24576[] = { | |
173 | 32000, 48000, 96000, 192000 | |
174 | }; | |
175 | ||
176 | static struct snd_pcm_hw_constraint_list constraints_24576 = { | |
177 | .count = ARRAY_SIZE(rates_24576), | |
178 | .list = rates_24576, | |
179 | }; | |
180 | ||
181 | static unsigned int rates_36864[] = { | |
182 | 48000, 96000, 19200 | |
183 | }; | |
184 | ||
185 | static struct snd_pcm_hw_constraint_list constraints_36864 = { | |
186 | .count = ARRAY_SIZE(rates_36864), | |
187 | .list = rates_36864, | |
992bee40 IL |
188 | }; |
189 | ||
190 | ||
191 | static int wm8741_startup(struct snd_pcm_substream *substream, | |
192 | struct snd_soc_dai *dai) | |
193 | { | |
194 | struct snd_soc_codec *codec = dai->codec; | |
195 | struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec); | |
196 | ||
197 | /* The set of sample rates that can be supported depends on the | |
198 | * MCLK supplied to the CODEC - enforce this. | |
199 | */ | |
200 | if (!wm8741->sysclk) { | |
201 | dev_err(codec->dev, | |
202 | "No MCLK configured, call set_sysclk() on init\n"); | |
203 | return -EINVAL; | |
204 | } | |
205 | ||
206 | snd_pcm_hw_constraint_list(substream->runtime, 0, | |
207 | SNDRV_PCM_HW_PARAM_RATE, | |
3fe4a5ee | 208 | wm8741->sysclk_constraints); |
992bee40 IL |
209 | |
210 | return 0; | |
211 | } | |
212 | ||
213 | static int wm8741_hw_params(struct snd_pcm_substream *substream, | |
214 | struct snd_pcm_hw_params *params, | |
215 | struct snd_soc_dai *dai) | |
216 | { | |
217 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
f0fba2ad | 218 | struct snd_soc_codec *codec = rtd->codec; |
992bee40 IL |
219 | struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec); |
220 | u16 iface = snd_soc_read(codec, WM8741_FORMAT_CONTROL) & 0x1FC; | |
221 | int i; | |
222 | ||
223 | /* Find a supported LRCLK ratio */ | |
224 | for (i = 0; i < ARRAY_SIZE(lrclk_ratios); i++) { | |
225 | if (wm8741->sysclk / params_rate(params) == | |
226 | lrclk_ratios[i].ratio) | |
227 | break; | |
228 | } | |
229 | ||
230 | /* Should never happen, should be handled by constraints */ | |
231 | if (i == ARRAY_SIZE(lrclk_ratios)) { | |
232 | dev_err(codec->dev, "MCLK/fs ratio %d unsupported\n", | |
233 | wm8741->sysclk / params_rate(params)); | |
234 | return -EINVAL; | |
235 | } | |
236 | ||
237 | /* bit size */ | |
238 | switch (params_format(params)) { | |
239 | case SNDRV_PCM_FORMAT_S16_LE: | |
240 | break; | |
241 | case SNDRV_PCM_FORMAT_S20_3LE: | |
242 | iface |= 0x0001; | |
243 | break; | |
244 | case SNDRV_PCM_FORMAT_S24_LE: | |
245 | iface |= 0x0002; | |
246 | break; | |
247 | case SNDRV_PCM_FORMAT_S32_LE: | |
248 | iface |= 0x0003; | |
249 | break; | |
250 | default: | |
251 | dev_dbg(codec->dev, "wm8741_hw_params: Unsupported bit size param = %d", | |
252 | params_format(params)); | |
253 | return -EINVAL; | |
254 | } | |
255 | ||
256 | dev_dbg(codec->dev, "wm8741_hw_params: bit size param = %d", | |
257 | params_format(params)); | |
258 | ||
259 | snd_soc_write(codec, WM8741_FORMAT_CONTROL, iface); | |
260 | return 0; | |
261 | } | |
262 | ||
263 | static int wm8741_set_dai_sysclk(struct snd_soc_dai *codec_dai, | |
264 | int clk_id, unsigned int freq, int dir) | |
265 | { | |
266 | struct snd_soc_codec *codec = codec_dai->codec; | |
267 | struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec); | |
992bee40 IL |
268 | |
269 | dev_dbg(codec->dev, "wm8741_set_dai_sysclk info: freq=%dHz\n", freq); | |
270 | ||
3fe4a5ee IL |
271 | switch (freq) { |
272 | case 11289600: | |
273 | wm8741->sysclk_constraints = &constraints_11289; | |
274 | wm8741->sysclk = freq; | |
275 | return 0; | |
276 | ||
277 | case 12288000: | |
278 | wm8741->sysclk_constraints = &constraints_12288; | |
279 | wm8741->sysclk = freq; | |
280 | return 0; | |
281 | ||
282 | case 16384000: | |
283 | wm8741->sysclk_constraints = &constraints_16384; | |
284 | wm8741->sysclk = freq; | |
285 | return 0; | |
286 | ||
287 | case 16934400: | |
288 | wm8741->sysclk_constraints = &constraints_16934; | |
289 | wm8741->sysclk = freq; | |
290 | return 0; | |
291 | ||
292 | case 18432000: | |
293 | wm8741->sysclk_constraints = &constraints_18432; | |
294 | wm8741->sysclk = freq; | |
295 | return 0; | |
296 | ||
297 | case 22579200: | |
298 | case 33868800: | |
299 | wm8741->sysclk_constraints = &constraints_22579; | |
300 | wm8741->sysclk = freq; | |
301 | return 0; | |
302 | ||
303 | case 24576000: | |
304 | wm8741->sysclk_constraints = &constraints_24576; | |
305 | wm8741->sysclk = freq; | |
306 | return 0; | |
307 | ||
308 | case 36864000: | |
309 | wm8741->sysclk_constraints = &constraints_36864; | |
310 | wm8741->sysclk = freq; | |
311 | return 0; | |
992bee40 | 312 | } |
3fe4a5ee | 313 | return -EINVAL; |
992bee40 IL |
314 | } |
315 | ||
316 | static int wm8741_set_dai_fmt(struct snd_soc_dai *codec_dai, | |
317 | unsigned int fmt) | |
318 | { | |
319 | struct snd_soc_codec *codec = codec_dai->codec; | |
320 | u16 iface = snd_soc_read(codec, WM8741_FORMAT_CONTROL) & 0x1C3; | |
321 | ||
322 | /* check master/slave audio interface */ | |
323 | switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { | |
324 | case SND_SOC_DAIFMT_CBS_CFS: | |
325 | break; | |
326 | default: | |
327 | return -EINVAL; | |
328 | } | |
329 | ||
330 | /* interface format */ | |
331 | switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { | |
332 | case SND_SOC_DAIFMT_I2S: | |
333 | iface |= 0x0008; | |
334 | break; | |
335 | case SND_SOC_DAIFMT_RIGHT_J: | |
336 | break; | |
337 | case SND_SOC_DAIFMT_LEFT_J: | |
338 | iface |= 0x0004; | |
339 | break; | |
340 | case SND_SOC_DAIFMT_DSP_A: | |
341 | iface |= 0x0003; | |
342 | break; | |
343 | case SND_SOC_DAIFMT_DSP_B: | |
344 | iface |= 0x0013; | |
345 | break; | |
346 | default: | |
347 | return -EINVAL; | |
348 | } | |
349 | ||
350 | /* clock inversion */ | |
351 | switch (fmt & SND_SOC_DAIFMT_INV_MASK) { | |
352 | case SND_SOC_DAIFMT_NB_NF: | |
353 | break; | |
354 | case SND_SOC_DAIFMT_IB_IF: | |
355 | iface |= 0x0010; | |
356 | break; | |
357 | case SND_SOC_DAIFMT_IB_NF: | |
358 | iface |= 0x0020; | |
359 | break; | |
360 | case SND_SOC_DAIFMT_NB_IF: | |
361 | iface |= 0x0030; | |
362 | break; | |
363 | default: | |
364 | return -EINVAL; | |
365 | } | |
366 | ||
367 | ||
368 | dev_dbg(codec->dev, "wm8741_set_dai_fmt: Format=%x, Clock Inv=%x\n", | |
369 | fmt & SND_SOC_DAIFMT_FORMAT_MASK, | |
370 | ((fmt & SND_SOC_DAIFMT_INV_MASK))); | |
371 | ||
372 | snd_soc_write(codec, WM8741_FORMAT_CONTROL, iface); | |
373 | return 0; | |
374 | } | |
375 | ||
376 | #define WM8741_RATES (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \ | |
377 | SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | \ | |
378 | SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_176400 | \ | |
379 | SNDRV_PCM_RATE_192000) | |
380 | ||
381 | #define WM8741_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\ | |
382 | SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE) | |
383 | ||
384 | static struct snd_soc_dai_ops wm8741_dai_ops = { | |
385 | .startup = wm8741_startup, | |
386 | .hw_params = wm8741_hw_params, | |
387 | .set_sysclk = wm8741_set_dai_sysclk, | |
388 | .set_fmt = wm8741_set_dai_fmt, | |
389 | }; | |
390 | ||
f0fba2ad | 391 | static struct snd_soc_dai_driver wm8741_dai = { |
30e2d368 | 392 | .name = "wm8741", |
992bee40 IL |
393 | .playback = { |
394 | .stream_name = "Playback", | |
395 | .channels_min = 2, /* Mono modes not yet supported */ | |
396 | .channels_max = 2, | |
397 | .rates = WM8741_RATES, | |
398 | .formats = WM8741_FORMATS, | |
399 | }, | |
400 | .ops = &wm8741_dai_ops, | |
401 | }; | |
992bee40 IL |
402 | |
403 | #ifdef CONFIG_PM | |
f0fba2ad | 404 | static int wm8741_resume(struct snd_soc_codec *codec) |
992bee40 | 405 | { |
992bee40 IL |
406 | u16 *cache = codec->reg_cache; |
407 | int i; | |
408 | ||
409 | /* RESTORE REG Cache */ | |
410 | for (i = 0; i < WM8741_REGISTER_COUNT; i++) { | |
411 | if (cache[i] == wm8741_reg_defaults[i] || WM8741_RESET == i) | |
412 | continue; | |
413 | snd_soc_write(codec, i, cache[i]); | |
414 | } | |
415 | return 0; | |
416 | } | |
417 | #else | |
418 | #define wm8741_suspend NULL | |
419 | #define wm8741_resume NULL | |
420 | #endif | |
421 | ||
f0fba2ad | 422 | static int wm8741_probe(struct snd_soc_codec *codec) |
992bee40 | 423 | { |
f0fba2ad | 424 | struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec); |
992bee40 IL |
425 | int ret = 0; |
426 | ||
f0fba2ad LG |
427 | ret = snd_soc_codec_set_cache_io(codec, 7, 9, wm8741->control_type); |
428 | if (ret != 0) { | |
429 | dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret); | |
430 | return ret; | |
992bee40 IL |
431 | } |
432 | ||
f0fba2ad | 433 | ret = wm8741_reset(codec); |
992bee40 | 434 | if (ret < 0) { |
f0fba2ad LG |
435 | dev_err(codec->dev, "Failed to issue reset\n"); |
436 | return ret; | |
992bee40 IL |
437 | } |
438 | ||
f0fba2ad LG |
439 | /* Change some default settings - latch VU */ |
440 | wm8741->reg_cache[WM8741_DACLLSB_ATTENUATION] |= WM8741_UPDATELL; | |
441 | wm8741->reg_cache[WM8741_DACLMSB_ATTENUATION] |= WM8741_UPDATELM; | |
442 | wm8741->reg_cache[WM8741_DACRLSB_ATTENUATION] |= WM8741_UPDATERL; | |
443 | wm8741->reg_cache[WM8741_DACRLSB_ATTENUATION] |= WM8741_UPDATERM; | |
444 | ||
992bee40 IL |
445 | snd_soc_add_controls(codec, wm8741_snd_controls, |
446 | ARRAY_SIZE(wm8741_snd_controls)); | |
447 | wm8741_add_widgets(codec); | |
448 | ||
f0fba2ad | 449 | dev_dbg(codec->dev, "Successful registration\n"); |
992bee40 | 450 | return ret; |
992bee40 IL |
451 | } |
452 | ||
f0fba2ad | 453 | static struct snd_soc_codec_driver soc_codec_dev_wm8741 = { |
992bee40 | 454 | .probe = wm8741_probe, |
992bee40 | 455 | .resume = wm8741_resume, |
e5eec34c | 456 | .reg_cache_size = ARRAY_SIZE(wm8741_reg_defaults), |
f0fba2ad LG |
457 | .reg_word_size = sizeof(u16), |
458 | .reg_cache_default = &wm8741_reg_defaults, | |
992bee40 | 459 | }; |
992bee40 | 460 | |
f0fba2ad LG |
461 | #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) |
462 | static int wm8741_i2c_probe(struct i2c_client *i2c, | |
463 | const struct i2c_device_id *id) | |
992bee40 | 464 | { |
f0fba2ad LG |
465 | struct wm8741_priv *wm8741; |
466 | int ret, i; | |
992bee40 | 467 | |
f0fba2ad LG |
468 | wm8741 = kzalloc(sizeof(struct wm8741_priv), GFP_KERNEL); |
469 | if (wm8741 == NULL) | |
470 | return -ENOMEM; | |
992bee40 | 471 | |
992bee40 IL |
472 | for (i = 0; i < ARRAY_SIZE(wm8741->supplies); i++) |
473 | wm8741->supplies[i].supply = wm8741_supply_names[i]; | |
474 | ||
f0fba2ad | 475 | ret = regulator_bulk_get(&i2c->dev, ARRAY_SIZE(wm8741->supplies), |
992bee40 IL |
476 | wm8741->supplies); |
477 | if (ret != 0) { | |
f0fba2ad | 478 | dev_err(&i2c->dev, "Failed to request supplies: %d\n", ret); |
992bee40 IL |
479 | goto err; |
480 | } | |
481 | ||
482 | ret = regulator_bulk_enable(ARRAY_SIZE(wm8741->supplies), | |
483 | wm8741->supplies); | |
484 | if (ret != 0) { | |
f0fba2ad | 485 | dev_err(&i2c->dev, "Failed to enable supplies: %d\n", ret); |
992bee40 IL |
486 | goto err_get; |
487 | } | |
488 | ||
f0fba2ad | 489 | i2c_set_clientdata(i2c, wm8741); |
f0fba2ad | 490 | wm8741->control_type = SND_SOC_I2C; |
992bee40 | 491 | |
f0fba2ad LG |
492 | ret = snd_soc_register_codec(&i2c->dev, |
493 | &soc_codec_dev_wm8741, &wm8741_dai, 1); | |
494 | if (ret < 0) | |
495 | goto err_enable; | |
496 | return ret; | |
992bee40 IL |
497 | |
498 | err_enable: | |
499 | regulator_bulk_disable(ARRAY_SIZE(wm8741->supplies), wm8741->supplies); | |
500 | ||
501 | err_get: | |
502 | regulator_bulk_free(ARRAY_SIZE(wm8741->supplies), wm8741->supplies); | |
992bee40 IL |
503 | err: |
504 | kfree(wm8741); | |
505 | return ret; | |
506 | } | |
507 | ||
f0fba2ad | 508 | static int wm8741_i2c_remove(struct i2c_client *client) |
992bee40 IL |
509 | { |
510 | struct wm8741_priv *wm8741 = i2c_get_clientdata(client); | |
f0fba2ad LG |
511 | |
512 | snd_soc_unregister_codec(&client->dev); | |
513 | regulator_bulk_free(ARRAY_SIZE(wm8741->supplies), wm8741->supplies); | |
514 | kfree(i2c_get_clientdata(client)); | |
992bee40 IL |
515 | return 0; |
516 | } | |
517 | ||
518 | static const struct i2c_device_id wm8741_i2c_id[] = { | |
519 | { "wm8741", 0 }, | |
520 | { } | |
521 | }; | |
522 | MODULE_DEVICE_TABLE(i2c, wm8741_i2c_id); | |
523 | ||
992bee40 IL |
524 | static struct i2c_driver wm8741_i2c_driver = { |
525 | .driver = { | |
f0fba2ad | 526 | .name = "wm8741-codec", |
992bee40 IL |
527 | .owner = THIS_MODULE, |
528 | }, | |
529 | .probe = wm8741_i2c_probe, | |
f0fba2ad | 530 | .remove = wm8741_i2c_remove, |
992bee40 IL |
531 | .id_table = wm8741_i2c_id, |
532 | }; | |
533 | #endif | |
534 | ||
535 | static int __init wm8741_modinit(void) | |
536 | { | |
f0fba2ad LG |
537 | int ret = 0; |
538 | ||
992bee40 IL |
539 | #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) |
540 | ret = i2c_add_driver(&wm8741_i2c_driver); | |
3fe4a5ee | 541 | if (ret != 0) |
f0fba2ad | 542 | pr_err("Failed to register WM8741 I2C driver: %d\n", ret); |
992bee40 | 543 | #endif |
f0fba2ad LG |
544 | |
545 | return ret; | |
992bee40 IL |
546 | } |
547 | module_init(wm8741_modinit); | |
548 | ||
549 | static void __exit wm8741_exit(void) | |
550 | { | |
551 | #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) | |
552 | i2c_del_driver(&wm8741_i2c_driver); | |
553 | #endif | |
554 | } | |
555 | module_exit(wm8741_exit); | |
556 | ||
557 | MODULE_DESCRIPTION("ASoC WM8741 driver"); | |
558 | MODULE_AUTHOR("Ian Lartey <ian@opensource.wolfsonmicro.com>"); | |
559 | MODULE_LICENSE("GPL"); |