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treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / sound / soc / img / img-i2s-out.c
blob4b18534096336bdf0c66c62cebf5df81732a4d3c
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * IMG I2S output controller driver
4 *
5 * Copyright (C) 2015 Imagination Technologies Ltd.
6 *
7 * Author: Damien Horsley <Damien.Horsley@imgtec.com>
8 */
9
10 #include <linux/clk.h>
11 #include <linux/init.h>
12 #include <linux/kernel.h>
13 #include <linux/module.h>
14 #include <linux/of.h>
15 #include <linux/platform_device.h>
16 #include <linux/pm_runtime.h>
17 #include <linux/reset.h>
18
19 #include <sound/core.h>
20 #include <sound/dmaengine_pcm.h>
21 #include <sound/initval.h>
22 #include <sound/pcm.h>
23 #include <sound/pcm_params.h>
24 #include <sound/soc.h>
25
26 #define IMG_I2S_OUT_TX_FIFO 0x0
27
28 #define IMG_I2S_OUT_CTL 0x4
29 #define IMG_I2S_OUT_CTL_DATA_EN_MASK BIT(24)
30 #define IMG_I2S_OUT_CTL_ACTIVE_CHAN_MASK 0xffe000
31 #define IMG_I2S_OUT_CTL_ACTIVE_CHAN_SHIFT 13
32 #define IMG_I2S_OUT_CTL_FRM_SIZE_MASK BIT(8)
33 #define IMG_I2S_OUT_CTL_MASTER_MASK BIT(6)
34 #define IMG_I2S_OUT_CTL_CLK_MASK BIT(5)
35 #define IMG_I2S_OUT_CTL_CLK_EN_MASK BIT(4)
36 #define IMG_I2S_OUT_CTL_FRM_CLK_POL_MASK BIT(3)
37 #define IMG_I2S_OUT_CTL_BCLK_POL_MASK BIT(2)
38 #define IMG_I2S_OUT_CTL_ME_MASK BIT(0)
39
40 #define IMG_I2S_OUT_CH_CTL 0x4
41 #define IMG_I2S_OUT_CHAN_CTL_CH_MASK BIT(11)
42 #define IMG_I2S_OUT_CHAN_CTL_LT_MASK BIT(10)
43 #define IMG_I2S_OUT_CHAN_CTL_FMT_MASK 0xf0
44 #define IMG_I2S_OUT_CHAN_CTL_FMT_SHIFT 4
45 #define IMG_I2S_OUT_CHAN_CTL_JUST_MASK BIT(3)
46 #define IMG_I2S_OUT_CHAN_CTL_CLKT_MASK BIT(1)
47 #define IMG_I2S_OUT_CHAN_CTL_ME_MASK BIT(0)
48
49 #define IMG_I2S_OUT_CH_STRIDE 0x20
50
51 struct img_i2s_out {
52 void __iomem *base;
53 struct clk *clk_sys;
54 struct clk *clk_ref;
55 struct snd_dmaengine_dai_dma_data dma_data;
56 struct device *dev;
57 unsigned int max_i2s_chan;
58 void __iomem *channel_base;
59 bool force_clk_active;
60 unsigned int active_channels;
61 struct reset_control *rst;
62 struct snd_soc_dai_driver dai_driver;
63 u32 suspend_ctl;
64 u32 *suspend_ch_ctl;
65 };
66
67 static int img_i2s_out_runtime_suspend(struct device *dev)
68 {
69 struct img_i2s_out *i2s = dev_get_drvdata(dev);
70
71 clk_disable_unprepare(i2s->clk_ref);
72 clk_disable_unprepare(i2s->clk_sys);
73
74 return 0;
75 }
76
77 static int img_i2s_out_runtime_resume(struct device *dev)
78 {
79 struct img_i2s_out *i2s = dev_get_drvdata(dev);
80 int ret;
81
82 ret = clk_prepare_enable(i2s->clk_sys);
83 if (ret) {
84 dev_err(dev, "clk_enable failed: %d\n", ret);
85 return ret;
86 }
87
88 ret = clk_prepare_enable(i2s->clk_ref);
89 if (ret) {
90 dev_err(dev, "clk_enable failed: %d\n", ret);
91 clk_disable_unprepare(i2s->clk_sys);
92 return ret;
93 }
94
95 return 0;
96 }
97
98 static inline void img_i2s_out_writel(struct img_i2s_out *i2s, u32 val,
99 u32 reg)
100 {
101 writel(val, i2s->base + reg);
102 }
103
104 static inline u32 img_i2s_out_readl(struct img_i2s_out *i2s, u32 reg)
105 {
106 return readl(i2s->base + reg);
107 }
108
109 static inline void img_i2s_out_ch_writel(struct img_i2s_out *i2s,
110 u32 chan, u32 val, u32 reg)
111 {
112 writel(val, i2s->channel_base + (chan * IMG_I2S_OUT_CH_STRIDE) + reg);
113 }
114
115 static inline u32 img_i2s_out_ch_readl(struct img_i2s_out *i2s, u32 chan,
116 u32 reg)
117 {
118 return readl(i2s->channel_base + (chan * IMG_I2S_OUT_CH_STRIDE) + reg);
119 }
120
121 static inline void img_i2s_out_ch_disable(struct img_i2s_out *i2s, u32 chan)
122 {
123 u32 reg;
124
125 reg = img_i2s_out_ch_readl(i2s, chan, IMG_I2S_OUT_CH_CTL);
126 reg &= ~IMG_I2S_OUT_CHAN_CTL_ME_MASK;
127 img_i2s_out_ch_writel(i2s, chan, reg, IMG_I2S_OUT_CH_CTL);
128 }
129
130 static inline void img_i2s_out_ch_enable(struct img_i2s_out *i2s, u32 chan)
131 {
132 u32 reg;
133
134 reg = img_i2s_out_ch_readl(i2s, chan, IMG_I2S_OUT_CH_CTL);
135 reg |= IMG_I2S_OUT_CHAN_CTL_ME_MASK;
136 img_i2s_out_ch_writel(i2s, chan, reg, IMG_I2S_OUT_CH_CTL);
137 }
138
139 static inline void img_i2s_out_disable(struct img_i2s_out *i2s)
140 {
141 u32 reg;
142
143 reg = img_i2s_out_readl(i2s, IMG_I2S_OUT_CTL);
144 reg &= ~IMG_I2S_OUT_CTL_ME_MASK;
145 img_i2s_out_writel(i2s, reg, IMG_I2S_OUT_CTL);
146 }
147
148 static inline void img_i2s_out_enable(struct img_i2s_out *i2s)
149 {
150 u32 reg;
151
152 reg = img_i2s_out_readl(i2s, IMG_I2S_OUT_CTL);
153 reg |= IMG_I2S_OUT_CTL_ME_MASK;
154 img_i2s_out_writel(i2s, reg, IMG_I2S_OUT_CTL);
155 }
156
157 static void img_i2s_out_reset(struct img_i2s_out *i2s)
158 {
159 int i;
160 u32 core_ctl, chan_ctl;
161
162 core_ctl = img_i2s_out_readl(i2s, IMG_I2S_OUT_CTL) &
163 ~IMG_I2S_OUT_CTL_ME_MASK &
164 ~IMG_I2S_OUT_CTL_DATA_EN_MASK;
165
166 if (!i2s->force_clk_active)
167 core_ctl &= ~IMG_I2S_OUT_CTL_CLK_EN_MASK;
168
169 chan_ctl = img_i2s_out_ch_readl(i2s, 0, IMG_I2S_OUT_CH_CTL) &
170 ~IMG_I2S_OUT_CHAN_CTL_ME_MASK;
171
172 reset_control_assert(i2s->rst);
173 reset_control_deassert(i2s->rst);
174
175 for (i = 0; i < i2s->max_i2s_chan; i++)
176 img_i2s_out_ch_writel(i2s, i, chan_ctl, IMG_I2S_OUT_CH_CTL);
177
178 for (i = 0; i < i2s->active_channels; i++)
179 img_i2s_out_ch_enable(i2s, i);
180
181 img_i2s_out_writel(i2s, core_ctl, IMG_I2S_OUT_CTL);
182 img_i2s_out_enable(i2s);
183 }
184
185 static int img_i2s_out_trigger(struct snd_pcm_substream *substream, int cmd,
186 struct snd_soc_dai *dai)
187 {
188 struct img_i2s_out *i2s = snd_soc_dai_get_drvdata(dai);
189 u32 reg;
190
191 switch (cmd) {
192 case SNDRV_PCM_TRIGGER_START:
193 case SNDRV_PCM_TRIGGER_RESUME:
194 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
195 reg = img_i2s_out_readl(i2s, IMG_I2S_OUT_CTL);
196 if (!i2s->force_clk_active)
197 reg |= IMG_I2S_OUT_CTL_CLK_EN_MASK;
198 reg |= IMG_I2S_OUT_CTL_DATA_EN_MASK;
199 img_i2s_out_writel(i2s, reg, IMG_I2S_OUT_CTL);
200 break;
201 case SNDRV_PCM_TRIGGER_STOP:
202 case SNDRV_PCM_TRIGGER_SUSPEND:
203 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
204 img_i2s_out_reset(i2s);
205 break;
206 default:
207 return -EINVAL;
208 }
209
210 return 0;
211 }
212
213 static int img_i2s_out_hw_params(struct snd_pcm_substream *substream,
214 struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
215 {
216 struct img_i2s_out *i2s = snd_soc_dai_get_drvdata(dai);
217 unsigned int channels, i2s_channels;
218 long pre_div_a, pre_div_b, diff_a, diff_b, rate, clk_rate;
219 int i;
220 u32 reg, control_mask, control_set = 0;
221 snd_pcm_format_t format;
222
223 rate = params_rate(params);
224 format = params_format(params);
225 channels = params_channels(params);
226 i2s_channels = channels / 2;
227
228 if (format != SNDRV_PCM_FORMAT_S32_LE)
229 return -EINVAL;
230
231 if ((channels < 2) ||
232 (channels > (i2s->max_i2s_chan * 2)) ||
233 (channels % 2))
234 return -EINVAL;
235
236 pre_div_a = clk_round_rate(i2s->clk_ref, rate * 256);
237 if (pre_div_a < 0)
238 return pre_div_a;
239 pre_div_b = clk_round_rate(i2s->clk_ref, rate * 384);
240 if (pre_div_b < 0)
241 return pre_div_b;
242
243 diff_a = abs((pre_div_a / 256) - rate);
244 diff_b = abs((pre_div_b / 384) - rate);
245
246 /* If diffs are equal, use lower clock rate */
247 if (diff_a > diff_b)
248 clk_set_rate(i2s->clk_ref, pre_div_b);
249 else
250 clk_set_rate(i2s->clk_ref, pre_div_a);
251
252 /*
253 * Another driver (eg alsa machine driver) may have rejected the above
254 * change. Get the current rate and set the register bit according to
255 * the new minimum diff
256 */
257 clk_rate = clk_get_rate(i2s->clk_ref);
258
259 diff_a = abs((clk_rate / 256) - rate);
260 diff_b = abs((clk_rate / 384) - rate);
261
262 if (diff_a > diff_b)
263 control_set |= IMG_I2S_OUT_CTL_CLK_MASK;
264
265 control_set |= ((i2s_channels - 1) <<
266 IMG_I2S_OUT_CTL_ACTIVE_CHAN_SHIFT) &
267 IMG_I2S_OUT_CTL_ACTIVE_CHAN_MASK;
268
269 control_mask = IMG_I2S_OUT_CTL_CLK_MASK |
270 IMG_I2S_OUT_CTL_ACTIVE_CHAN_MASK;
271
272 img_i2s_out_disable(i2s);
273
274 reg = img_i2s_out_readl(i2s, IMG_I2S_OUT_CTL);
275 reg = (reg & ~control_mask) | control_set;
276 img_i2s_out_writel(i2s, reg, IMG_I2S_OUT_CTL);
277
278 for (i = 0; i < i2s_channels; i++)
279 img_i2s_out_ch_enable(i2s, i);
280
281 for (; i < i2s->max_i2s_chan; i++)
282 img_i2s_out_ch_disable(i2s, i);
283
284 img_i2s_out_enable(i2s);
285
286 i2s->active_channels = i2s_channels;
287
288 return 0;
289 }
290
291 static int img_i2s_out_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
292 {
293 struct img_i2s_out *i2s = snd_soc_dai_get_drvdata(dai);
294 int i, ret;
295 bool force_clk_active;
296 u32 chan_control_mask, control_mask, chan_control_set = 0;
297 u32 reg, control_set = 0;
298
299 force_clk_active = ((fmt & SND_SOC_DAIFMT_CLOCK_MASK) ==
300 SND_SOC_DAIFMT_CONT);
301
302 if (force_clk_active)
303 control_set |= IMG_I2S_OUT_CTL_CLK_EN_MASK;
304
305 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
306 case SND_SOC_DAIFMT_CBM_CFM:
307 break;
308 case SND_SOC_DAIFMT_CBS_CFS:
309 control_set |= IMG_I2S_OUT_CTL_MASTER_MASK;
310 break;
311 default:
312 return -EINVAL;
313 }
314
315 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
316 case SND_SOC_DAIFMT_NB_NF:
317 control_set |= IMG_I2S_OUT_CTL_BCLK_POL_MASK;
318 break;
319 case SND_SOC_DAIFMT_NB_IF:
320 control_set |= IMG_I2S_OUT_CTL_BCLK_POL_MASK;
321 control_set |= IMG_I2S_OUT_CTL_FRM_CLK_POL_MASK;
322 break;
323 case SND_SOC_DAIFMT_IB_NF:
324 break;
325 case SND_SOC_DAIFMT_IB_IF:
326 control_set |= IMG_I2S_OUT_CTL_FRM_CLK_POL_MASK;
327 break;
328 default:
329 return -EINVAL;
330 }
331
332 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
333 case SND_SOC_DAIFMT_I2S:
334 chan_control_set |= IMG_I2S_OUT_CHAN_CTL_CLKT_MASK;
335 break;
336 case SND_SOC_DAIFMT_LEFT_J:
337 break;
338 default:
339 return -EINVAL;
340 }
341
342 control_mask = IMG_I2S_OUT_CTL_CLK_EN_MASK |
343 IMG_I2S_OUT_CTL_MASTER_MASK |
344 IMG_I2S_OUT_CTL_BCLK_POL_MASK |
345 IMG_I2S_OUT_CTL_FRM_CLK_POL_MASK;
346
347 chan_control_mask = IMG_I2S_OUT_CHAN_CTL_CLKT_MASK;
348
349 ret = pm_runtime_get_sync(i2s->dev);
350 if (ret < 0)
351 return ret;
352
353 img_i2s_out_disable(i2s);
354
355 reg = img_i2s_out_readl(i2s, IMG_I2S_OUT_CTL);
356 reg = (reg & ~control_mask) | control_set;
357 img_i2s_out_writel(i2s, reg, IMG_I2S_OUT_CTL);
358
359 for (i = 0; i < i2s->active_channels; i++)
360 img_i2s_out_ch_disable(i2s, i);
361
362 for (i = 0; i < i2s->max_i2s_chan; i++) {
363 reg = img_i2s_out_ch_readl(i2s, i, IMG_I2S_OUT_CH_CTL);
364 reg = (reg & ~chan_control_mask) | chan_control_set;
365 img_i2s_out_ch_writel(i2s, i, reg, IMG_I2S_OUT_CH_CTL);
366 }
367
368 for (i = 0; i < i2s->active_channels; i++)
369 img_i2s_out_ch_enable(i2s, i);
370
371 img_i2s_out_enable(i2s);
372 pm_runtime_put(i2s->dev);
373
374 i2s->force_clk_active = force_clk_active;
375
376 return 0;
377 }
378
379 static const struct snd_soc_dai_ops img_i2s_out_dai_ops = {
380 .trigger = img_i2s_out_trigger,
381 .hw_params = img_i2s_out_hw_params,
382 .set_fmt = img_i2s_out_set_fmt
383 };
384
385 static int img_i2s_out_dai_probe(struct snd_soc_dai *dai)
386 {
387 struct img_i2s_out *i2s = snd_soc_dai_get_drvdata(dai);
388
389 snd_soc_dai_init_dma_data(dai, &i2s->dma_data, NULL);
390
391 return 0;
392 }
393
394 static const struct snd_soc_component_driver img_i2s_out_component = {
395 .name = "img-i2s-out"
396 };
397
398 static int img_i2s_out_dma_prepare_slave_config(struct snd_pcm_substream *st,
399 struct snd_pcm_hw_params *params, struct dma_slave_config *sc)
400 {
401 unsigned int i2s_channels = params_channels(params) / 2;
402 struct snd_soc_pcm_runtime *rtd = st->private_data;
403 struct snd_dmaengine_dai_dma_data *dma_data;
404 int ret;
405
406 dma_data = snd_soc_dai_get_dma_data(rtd->cpu_dai, st);
407
408 ret = snd_hwparams_to_dma_slave_config(st, params, sc);
409 if (ret)
410 return ret;
411
412 sc->dst_addr = dma_data->addr;
413 sc->dst_addr_width = dma_data->addr_width;
414 sc->dst_maxburst = 4 * i2s_channels;
415
416 return 0;
417 }
418
419 static const struct snd_dmaengine_pcm_config img_i2s_out_dma_config = {
420 .prepare_slave_config = img_i2s_out_dma_prepare_slave_config
421 };
422
423 static int img_i2s_out_probe(struct platform_device *pdev)
424 {
425 struct img_i2s_out *i2s;
426 struct resource *res;
427 void __iomem *base;
428 int i, ret;
429 unsigned int max_i2s_chan_pow_2;
430 u32 reg;
431 struct device *dev = &pdev->dev;
432
433 i2s = devm_kzalloc(&pdev->dev, sizeof(*i2s), GFP_KERNEL);
434 if (!i2s)
435 return -ENOMEM;
436
437 platform_set_drvdata(pdev, i2s);
438
439 i2s->dev = &pdev->dev;
440
441 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
442 base = devm_ioremap_resource(&pdev->dev, res);
443 if (IS_ERR(base))
444 return PTR_ERR(base);
445
446 i2s->base = base;
447
448 if (of_property_read_u32(pdev->dev.of_node, "img,i2s-channels",
449 &i2s->max_i2s_chan)) {
450 dev_err(&pdev->dev, "No img,i2s-channels property\n");
451 return -EINVAL;
452 }
453
454 max_i2s_chan_pow_2 = 1 << get_count_order(i2s->max_i2s_chan);
455
456 i2s->channel_base = base + (max_i2s_chan_pow_2 * 0x20);
457
458 i2s->rst = devm_reset_control_get_exclusive(&pdev->dev, "rst");
459 if (IS_ERR(i2s->rst)) {
460 if (PTR_ERR(i2s->rst) != -EPROBE_DEFER)
461 dev_err(&pdev->dev, "No top level reset found\n");
462 return PTR_ERR(i2s->rst);
463 }
464
465 i2s->clk_sys = devm_clk_get(&pdev->dev, "sys");
466 if (IS_ERR(i2s->clk_sys)) {
467 if (PTR_ERR(i2s->clk_sys) != -EPROBE_DEFER)
468 dev_err(dev, "Failed to acquire clock 'sys'\n");
469 return PTR_ERR(i2s->clk_sys);
470 }
471
472 i2s->clk_ref = devm_clk_get(&pdev->dev, "ref");
473 if (IS_ERR(i2s->clk_ref)) {
474 if (PTR_ERR(i2s->clk_ref) != -EPROBE_DEFER)
475 dev_err(dev, "Failed to acquire clock 'ref'\n");
476 return PTR_ERR(i2s->clk_ref);
477 }
478
479 i2s->suspend_ch_ctl = devm_kcalloc(dev,
480 i2s->max_i2s_chan, sizeof(*i2s->suspend_ch_ctl), GFP_KERNEL);
481 if (!i2s->suspend_ch_ctl)
482 return -ENOMEM;
483
484 pm_runtime_enable(&pdev->dev);
485 if (!pm_runtime_enabled(&pdev->dev)) {
486 ret = img_i2s_out_runtime_resume(&pdev->dev);
487 if (ret)
488 goto err_pm_disable;
489 }
490 ret = pm_runtime_get_sync(&pdev->dev);
491 if (ret < 0)
492 goto err_suspend;
493
494 reg = IMG_I2S_OUT_CTL_FRM_SIZE_MASK;
495 img_i2s_out_writel(i2s, reg, IMG_I2S_OUT_CTL);
496
497 reg = IMG_I2S_OUT_CHAN_CTL_JUST_MASK |
498 IMG_I2S_OUT_CHAN_CTL_LT_MASK |
499 IMG_I2S_OUT_CHAN_CTL_CH_MASK |
500 (8 << IMG_I2S_OUT_CHAN_CTL_FMT_SHIFT);
501
502 for (i = 0; i < i2s->max_i2s_chan; i++)
503 img_i2s_out_ch_writel(i2s, i, reg, IMG_I2S_OUT_CH_CTL);
504
505 img_i2s_out_reset(i2s);
506 pm_runtime_put(&pdev->dev);
507
508 i2s->active_channels = 1;
509 i2s->dma_data.addr = res->start + IMG_I2S_OUT_TX_FIFO;
510 i2s->dma_data.addr_width = 4;
511 i2s->dma_data.maxburst = 4;
512
513 i2s->dai_driver.probe = img_i2s_out_dai_probe;
514 i2s->dai_driver.playback.channels_min = 2;
515 i2s->dai_driver.playback.channels_max = i2s->max_i2s_chan * 2;
516 i2s->dai_driver.playback.rates = SNDRV_PCM_RATE_8000_192000;
517 i2s->dai_driver.playback.formats = SNDRV_PCM_FMTBIT_S32_LE;
518 i2s->dai_driver.ops = &img_i2s_out_dai_ops;
519
520 ret = devm_snd_soc_register_component(&pdev->dev,
521 &img_i2s_out_component, &i2s->dai_driver, 1);
522 if (ret)
523 goto err_suspend;
524
525 ret = devm_snd_dmaengine_pcm_register(&pdev->dev,
526 &img_i2s_out_dma_config, 0);
527 if (ret)
528 goto err_suspend;
529
530 return 0;
531
532 err_suspend:
533 if (!pm_runtime_status_suspended(&pdev->dev))
534 img_i2s_out_runtime_suspend(&pdev->dev);
535 err_pm_disable:
536 pm_runtime_disable(&pdev->dev);
537
538 return ret;
539 }
540
541 static int img_i2s_out_dev_remove(struct platform_device *pdev)
542 {
543 pm_runtime_disable(&pdev->dev);
544 if (!pm_runtime_status_suspended(&pdev->dev))
545 img_i2s_out_runtime_suspend(&pdev->dev);
546
547 return 0;
548 }
549
550 #ifdef CONFIG_PM_SLEEP
551 static int img_i2s_out_suspend(struct device *dev)
552 {
553 struct img_i2s_out *i2s = dev_get_drvdata(dev);
554 int i, ret;
555 u32 reg;
556
557 if (pm_runtime_status_suspended(dev)) {
558 ret = img_i2s_out_runtime_resume(dev);
559 if (ret)
560 return ret;
561 }
562
563 for (i = 0; i < i2s->max_i2s_chan; i++) {
564 reg = img_i2s_out_ch_readl(i2s, i, IMG_I2S_OUT_CH_CTL);
565 i2s->suspend_ch_ctl[i] = reg;
566 }
567
568 i2s->suspend_ctl = img_i2s_out_readl(i2s, IMG_I2S_OUT_CTL);
569
570 img_i2s_out_runtime_suspend(dev);
571
572 return 0;
573 }
574
575 static int img_i2s_out_resume(struct device *dev)
576 {
577 struct img_i2s_out *i2s = dev_get_drvdata(dev);
578 int i, ret;
579 u32 reg;
580
581 ret = img_i2s_out_runtime_resume(dev);
582 if (ret)
583 return ret;
584
585 for (i = 0; i < i2s->max_i2s_chan; i++) {
586 reg = i2s->suspend_ch_ctl[i];
587 img_i2s_out_ch_writel(i2s, i, reg, IMG_I2S_OUT_CH_CTL);
588 }
589
590 img_i2s_out_writel(i2s, i2s->suspend_ctl, IMG_I2S_OUT_CTL);
591
592 if (pm_runtime_status_suspended(dev))
593 img_i2s_out_runtime_suspend(dev);
594
595 return 0;
596 }
597 #endif
598
599 static const struct of_device_id img_i2s_out_of_match[] = {
600 { .compatible = "img,i2s-out" },
601 {}
602 };
603 MODULE_DEVICE_TABLE(of, img_i2s_out_of_match);
604
605 static const struct dev_pm_ops img_i2s_out_pm_ops = {
606 SET_RUNTIME_PM_OPS(img_i2s_out_runtime_suspend,
607 img_i2s_out_runtime_resume, NULL)
608 SET_SYSTEM_SLEEP_PM_OPS(img_i2s_out_suspend, img_i2s_out_resume)
609 };
610
611 static struct platform_driver img_i2s_out_driver = {
612 .driver = {
613 .name = "img-i2s-out",
614 .of_match_table = img_i2s_out_of_match,
615 .pm = &img_i2s_out_pm_ops
616 },
617 .probe = img_i2s_out_probe,
618 .remove = img_i2s_out_dev_remove
619 };
620 module_platform_driver(img_i2s_out_driver);
621
622 MODULE_AUTHOR("Damien Horsley <Damien.Horsley@imgtec.com>");
623 MODULE_DESCRIPTION("IMG I2S Output Driver");
624 MODULE_LICENSE("GPL v2");
Linux with added FPC-III support