1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * NXP AUDMIX ALSA SoC Digital Audio Interface (DAI) driver
4 *
5 * Copyright 2017 NXP
6 */
7
8 #include <linux/clk.h>
9 #include <linux/module.h>
10 #include <linux/of_platform.h>
11 #include <linux/pm_runtime.h>
12 #include <sound/soc.h>
13 #include <sound/pcm_params.h>
14
15 #include "fsl_audmix.h"
16
17 #define SOC_ENUM_SINGLE_S(xreg, xshift, xtexts) \
18 SOC_ENUM_SINGLE(xreg, xshift, ARRAY_SIZE(xtexts), xtexts)
19
20 static const char
21 *tdm_sel[] = { "TDM1", "TDM2", },
22 *mode_sel[] = { "Disabled", "TDM1", "TDM2", "Mixed", },
23 *width_sel[] = { "16b", "18b", "20b", "24b", "32b", },
24 *endis_sel[] = { "Disabled", "Enabled", },
25 *updn_sel[] = { "Downward", "Upward", },
26 *mask_sel[] = { "Unmask", "Mask", };
27
28 static const struct soc_enum fsl_audmix_enum[] = {
29 /* FSL_AUDMIX_CTR enums */
30 SOC_ENUM_SINGLE_S(FSL_AUDMIX_CTR, FSL_AUDMIX_CTR_MIXCLK_SHIFT, tdm_sel),
31 SOC_ENUM_SINGLE_S(FSL_AUDMIX_CTR, FSL_AUDMIX_CTR_OUTSRC_SHIFT, mode_sel),
32 SOC_ENUM_SINGLE_S(FSL_AUDMIX_CTR, FSL_AUDMIX_CTR_OUTWIDTH_SHIFT, width_sel),
33 SOC_ENUM_SINGLE_S(FSL_AUDMIX_CTR, FSL_AUDMIX_CTR_MASKRTDF_SHIFT, mask_sel),
34 SOC_ENUM_SINGLE_S(FSL_AUDMIX_CTR, FSL_AUDMIX_CTR_MASKCKDF_SHIFT, mask_sel),
35 SOC_ENUM_SINGLE_S(FSL_AUDMIX_CTR, FSL_AUDMIX_CTR_SYNCMODE_SHIFT, endis_sel),
36 SOC_ENUM_SINGLE_S(FSL_AUDMIX_CTR, FSL_AUDMIX_CTR_SYNCSRC_SHIFT, tdm_sel),
37 /* FSL_AUDMIX_ATCR0 enums */
38 SOC_ENUM_SINGLE_S(FSL_AUDMIX_ATCR0, 0, endis_sel),
39 SOC_ENUM_SINGLE_S(FSL_AUDMIX_ATCR0, 1, updn_sel),
40 /* FSL_AUDMIX_ATCR1 enums */
41 SOC_ENUM_SINGLE_S(FSL_AUDMIX_ATCR1, 0, endis_sel),
42 SOC_ENUM_SINGLE_S(FSL_AUDMIX_ATCR1, 1, updn_sel),
43 };
44
45 struct fsl_audmix_state {
46 u8 tdms;
47 u8 clk;
48 char msg[64];
49 };
50
51 static const struct fsl_audmix_state prms[4][4] = {{
52 /* DIS->DIS, do nothing */
53 { .tdms = 0, .clk = 0, .msg = "" },
54 /* DIS->TDM1*/
55 { .tdms = 1, .clk = 1, .msg = "DIS->TDM1: TDM1 not started!\n" },
56 /* DIS->TDM2*/
57 { .tdms = 2, .clk = 2, .msg = "DIS->TDM2: TDM2 not started!\n" },
58 /* DIS->MIX */
59 { .tdms = 3, .clk = 0, .msg = "DIS->MIX: Please start both TDMs!\n" }
60 }, { /* TDM1->DIS */
61 { .tdms = 1, .clk = 0, .msg = "TDM1->DIS: TDM1 not started!\n" },
62 /* TDM1->TDM1, do nothing */
63 { .tdms = 0, .clk = 0, .msg = "" },
64 /* TDM1->TDM2 */
65 { .tdms = 3, .clk = 2, .msg = "TDM1->TDM2: Please start both TDMs!\n" },
66 /* TDM1->MIX */
67 { .tdms = 3, .clk = 0, .msg = "TDM1->MIX: Please start both TDMs!\n" }
68 }, { /* TDM2->DIS */
69 { .tdms = 2, .clk = 0, .msg = "TDM2->DIS: TDM2 not started!\n" },
70 /* TDM2->TDM1 */
71 { .tdms = 3, .clk = 1, .msg = "TDM2->TDM1: Please start both TDMs!\n" },
72 /* TDM2->TDM2, do nothing */
73 { .tdms = 0, .clk = 0, .msg = "" },
74 /* TDM2->MIX */
75 { .tdms = 3, .clk = 0, .msg = "TDM2->MIX: Please start both TDMs!\n" }
76 }, { /* MIX->DIS */
77 { .tdms = 3, .clk = 0, .msg = "MIX->DIS: Please start both TDMs!\n" },
78 /* MIX->TDM1 */
79 { .tdms = 3, .clk = 1, .msg = "MIX->TDM1: Please start both TDMs!\n" },
80 /* MIX->TDM2 */
81 { .tdms = 3, .clk = 2, .msg = "MIX->TDM2: Please start both TDMs!\n" },
82 /* MIX->MIX, do nothing */
83 { .tdms = 0, .clk = 0, .msg = "" }
84 }, };
85
fsl_audmix_state_trans(struct snd_soc_component * comp,unsigned int * mask,unsigned int * ctr,const struct fsl_audmix_state prm)86 static int fsl_audmix_state_trans(struct snd_soc_component *comp,
87 unsigned int *mask, unsigned int *ctr,
88 const struct fsl_audmix_state prm)
89 {
90 struct fsl_audmix *priv = snd_soc_component_get_drvdata(comp);
91 /* Enforce all required TDMs are started */
92 if ((priv->tdms & prm.tdms) != prm.tdms) {
93 dev_dbg(comp->dev, "%s", prm.msg);
94 return -EINVAL;
95 }
96
97 switch (prm.clk) {
98 case 1:
99 case 2:
100 /* Set mix clock */
101 (*mask) |= FSL_AUDMIX_CTR_MIXCLK_MASK;
102 (*ctr) |= FSL_AUDMIX_CTR_MIXCLK(prm.clk - 1);
103 break;
104 default:
105 break;
106 }
107
108 return 0;
109 }
110
fsl_audmix_put_mix_clk_src(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)111 static int fsl_audmix_put_mix_clk_src(struct snd_kcontrol *kcontrol,
112 struct snd_ctl_elem_value *ucontrol)
113 {
114 struct snd_soc_component *comp = snd_kcontrol_chip(kcontrol);
115 struct fsl_audmix *priv = snd_soc_component_get_drvdata(comp);
116 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
117 unsigned int *item = ucontrol->value.enumerated.item;
118 unsigned int reg_val, val, mix_clk;
119
120 /* Get current state */
121 reg_val = snd_soc_component_read(comp, FSL_AUDMIX_CTR);
122 mix_clk = ((reg_val & FSL_AUDMIX_CTR_MIXCLK_MASK)
123 >> FSL_AUDMIX_CTR_MIXCLK_SHIFT);
124 val = snd_soc_enum_item_to_val(e, item[0]);
125
126 dev_dbg(comp->dev, "TDMs=x%08x, val=x%08x\n", priv->tdms, val);
127
128 /**
129 * Ensure the current selected mixer clock is available
130 * for configuration propagation
131 */
132 if (!(priv->tdms & BIT(mix_clk))) {
133 dev_err(comp->dev,
134 "Started TDM%d needed for config propagation!\n",
135 mix_clk + 1);
136 return -EINVAL;
137 }
138
139 if (!(priv->tdms & BIT(val))) {
140 dev_err(comp->dev,
141 "The selected clock source has no TDM%d enabled!\n",
142 val + 1);
143 return -EINVAL;
144 }
145
146 return snd_soc_put_enum_double(kcontrol, ucontrol);
147 }
148
fsl_audmix_put_out_src(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * ucontrol)149 static int fsl_audmix_put_out_src(struct snd_kcontrol *kcontrol,
150 struct snd_ctl_elem_value *ucontrol)
151 {
152 struct snd_soc_component *comp = snd_kcontrol_chip(kcontrol);
153 struct fsl_audmix *priv = snd_soc_component_get_drvdata(comp);
154 struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
155 unsigned int *item = ucontrol->value.enumerated.item;
156 u32 out_src, mix_clk;
157 unsigned int reg_val, val, mask = 0, ctr = 0;
158 int ret;
159
160 /* Get current state */
161 reg_val = snd_soc_component_read(comp, FSL_AUDMIX_CTR);
162
163 /* "From" state */
164 out_src = ((reg_val & FSL_AUDMIX_CTR_OUTSRC_MASK)
165 >> FSL_AUDMIX_CTR_OUTSRC_SHIFT);
166 mix_clk = ((reg_val & FSL_AUDMIX_CTR_MIXCLK_MASK)
167 >> FSL_AUDMIX_CTR_MIXCLK_SHIFT);
168
169 /* "To" state */
170 val = snd_soc_enum_item_to_val(e, item[0]);
171
172 dev_dbg(comp->dev, "TDMs=x%08x, val=x%08x\n", priv->tdms, val);
173
174 /* Check if state is changing ... */
175 if (out_src == val)
176 return 0;
177 /**
178 * Ensure the current selected mixer clock is available
179 * for configuration propagation
180 */
181 if (!(priv->tdms & BIT(mix_clk))) {
182 dev_err(comp->dev,
183 "Started TDM%d needed for config propagation!\n",
184 mix_clk + 1);
185 return -EINVAL;
186 }
187
188 /* Check state transition constraints */
189 ret = fsl_audmix_state_trans(comp, &mask, &ctr, prms[out_src][val]);
190 if (ret)
191 return ret;
192
193 /* Complete transition to new state */
194 mask |= FSL_AUDMIX_CTR_OUTSRC_MASK;
195 ctr |= FSL_AUDMIX_CTR_OUTSRC(val);
196
197 return snd_soc_component_update_bits(comp, FSL_AUDMIX_CTR, mask, ctr);
198 }
199
200 static const struct snd_kcontrol_new fsl_audmix_snd_controls[] = {
201 /* FSL_AUDMIX_CTR controls */
202 SOC_ENUM_EXT("Mixing Clock Source", fsl_audmix_enum[0],
203 snd_soc_get_enum_double, fsl_audmix_put_mix_clk_src),
204 SOC_ENUM_EXT("Output Source", fsl_audmix_enum[1],
205 snd_soc_get_enum_double, fsl_audmix_put_out_src),
206 SOC_ENUM("Output Width", fsl_audmix_enum[2]),
207 SOC_ENUM("Frame Rate Diff Error", fsl_audmix_enum[3]),
208 SOC_ENUM("Clock Freq Diff Error", fsl_audmix_enum[4]),
209 SOC_ENUM("Sync Mode Config", fsl_audmix_enum[5]),
210 SOC_ENUM("Sync Mode Clk Source", fsl_audmix_enum[6]),
211 /* TDM1 Attenuation controls */
212 SOC_ENUM("TDM1 Attenuation", fsl_audmix_enum[7]),
213 SOC_ENUM("TDM1 Attenuation Direction", fsl_audmix_enum[8]),
214 SOC_SINGLE("TDM1 Attenuation Step Divider", FSL_AUDMIX_ATCR0,
215 2, 0x00fff, 0),
216 SOC_SINGLE("TDM1 Attenuation Initial Value", FSL_AUDMIX_ATIVAL0,
217 0, 0x3ffff, 0),
218 SOC_SINGLE("TDM1 Attenuation Step Up Factor", FSL_AUDMIX_ATSTPUP0,
219 0, 0x3ffff, 0),
220 SOC_SINGLE("TDM1 Attenuation Step Down Factor", FSL_AUDMIX_ATSTPDN0,
221 0, 0x3ffff, 0),
222 SOC_SINGLE("TDM1 Attenuation Step Target", FSL_AUDMIX_ATSTPTGT0,
223 0, 0x3ffff, 0),
224 /* TDM2 Attenuation controls */
225 SOC_ENUM("TDM2 Attenuation", fsl_audmix_enum[9]),
226 SOC_ENUM("TDM2 Attenuation Direction", fsl_audmix_enum[10]),
227 SOC_SINGLE("TDM2 Attenuation Step Divider", FSL_AUDMIX_ATCR1,
228 2, 0x00fff, 0),
229 SOC_SINGLE("TDM2 Attenuation Initial Value", FSL_AUDMIX_ATIVAL1,
230 0, 0x3ffff, 0),
231 SOC_SINGLE("TDM2 Attenuation Step Up Factor", FSL_AUDMIX_ATSTPUP1,
232 0, 0x3ffff, 0),
233 SOC_SINGLE("TDM2 Attenuation Step Down Factor", FSL_AUDMIX_ATSTPDN1,
234 0, 0x3ffff, 0),
235 SOC_SINGLE("TDM2 Attenuation Step Target", FSL_AUDMIX_ATSTPTGT1,
236 0, 0x3ffff, 0),
237 };
238
fsl_audmix_dai_set_fmt(struct snd_soc_dai * dai,unsigned int fmt)239 static int fsl_audmix_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
240 {
241 struct snd_soc_component *comp = dai->component;
242 u32 mask = 0, ctr = 0;
243
244 /* AUDMIX is working in DSP_A format only */
245 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
246 case SND_SOC_DAIFMT_DSP_A:
247 break;
248 default:
249 return -EINVAL;
250 }
251
252 /* For playback the AUDMIX is consumer, and for record is provider */
253 switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {
254 case SND_SOC_DAIFMT_BC_FC:
255 case SND_SOC_DAIFMT_BP_FP:
256 break;
257 default:
258 return -EINVAL;
259 }
260
261 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
262 case SND_SOC_DAIFMT_IB_NF:
263 /* Output data will be written on positive edge of the clock */
264 ctr |= FSL_AUDMIX_CTR_OUTCKPOL(0);
265 break;
266 case SND_SOC_DAIFMT_NB_NF:
267 /* Output data will be written on negative edge of the clock */
268 ctr |= FSL_AUDMIX_CTR_OUTCKPOL(1);
269 break;
270 default:
271 return -EINVAL;
272 }
273
274 mask |= FSL_AUDMIX_CTR_OUTCKPOL_MASK;
275
276 return snd_soc_component_update_bits(comp, FSL_AUDMIX_CTR, mask, ctr);
277 }
278
fsl_audmix_dai_trigger(struct snd_pcm_substream * substream,int cmd,struct snd_soc_dai * dai)279 static int fsl_audmix_dai_trigger(struct snd_pcm_substream *substream, int cmd,
280 struct snd_soc_dai *dai)
281 {
282 struct fsl_audmix *priv = snd_soc_dai_get_drvdata(dai);
283 unsigned long lock_flags;
284
285 /* Capture stream shall not be handled */
286 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
287 return 0;
288
289 switch (cmd) {
290 case SNDRV_PCM_TRIGGER_START:
291 case SNDRV_PCM_TRIGGER_RESUME:
292 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
293 spin_lock_irqsave(&priv->lock, lock_flags);
294 priv->tdms |= BIT(dai->driver->id);
295 spin_unlock_irqrestore(&priv->lock, lock_flags);
296 break;
297 case SNDRV_PCM_TRIGGER_STOP:
298 case SNDRV_PCM_TRIGGER_SUSPEND:
299 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
300 spin_lock_irqsave(&priv->lock, lock_flags);
301 priv->tdms &= ~BIT(dai->driver->id);
302 spin_unlock_irqrestore(&priv->lock, lock_flags);
303 break;
304 default:
305 return -EINVAL;
306 }
307
308 return 0;
309 }
310
311 static const struct snd_soc_dai_ops fsl_audmix_dai_ops = {
312 .set_fmt = fsl_audmix_dai_set_fmt,
313 .trigger = fsl_audmix_dai_trigger,
314 };
315
316 static struct snd_soc_dai_driver fsl_audmix_dai[] = {
317 {
318 .id = 0,
319 .name = "audmix-0",
320 .playback = {
321 .stream_name = "AUDMIX-Playback-0",
322 .channels_min = 8,
323 .channels_max = 8,
324 .rate_min = 8000,
325 .rate_max = 96000,
326 .rates = SNDRV_PCM_RATE_8000_96000,
327 .formats = FSL_AUDMIX_FORMATS,
328 },
329 .ops = &fsl_audmix_dai_ops,
330 },
331 {
332 .id = 1,
333 .name = "audmix-1",
334 .playback = {
335 .stream_name = "AUDMIX-Playback-1",
336 .channels_min = 8,
337 .channels_max = 8,
338 .rate_min = 8000,
339 .rate_max = 96000,
340 .rates = SNDRV_PCM_RATE_8000_96000,
341 .formats = FSL_AUDMIX_FORMATS,
342 },
343 .ops = &fsl_audmix_dai_ops,
344 },
345 {
346 .id = 2,
347 .name = "audmix-2",
348 .capture = {
349 .stream_name = "AUDMIX-Capture-0",
350 .channels_min = 8,
351 .channels_max = 8,
352 .rate_min = 8000,
353 .rate_max = 96000,
354 .rates = SNDRV_PCM_RATE_8000_96000,
355 .formats = FSL_AUDMIX_FORMATS,
356 },
357 .ops = &fsl_audmix_dai_ops,
358 },
359 };
360
361 static const struct snd_soc_component_driver fsl_audmix_component = {
362 .name = "fsl-audmix-dai",
363 .controls = fsl_audmix_snd_controls,
364 .num_controls = ARRAY_SIZE(fsl_audmix_snd_controls),
365 };
366
fsl_audmix_readable_reg(struct device * dev,unsigned int reg)367 static bool fsl_audmix_readable_reg(struct device *dev, unsigned int reg)
368 {
369 switch (reg) {
370 case FSL_AUDMIX_CTR:
371 case FSL_AUDMIX_STR:
372 case FSL_AUDMIX_ATCR0:
373 case FSL_AUDMIX_ATIVAL0:
374 case FSL_AUDMIX_ATSTPUP0:
375 case FSL_AUDMIX_ATSTPDN0:
376 case FSL_AUDMIX_ATSTPTGT0:
377 case FSL_AUDMIX_ATTNVAL0:
378 case FSL_AUDMIX_ATSTP0:
379 case FSL_AUDMIX_ATCR1:
380 case FSL_AUDMIX_ATIVAL1:
381 case FSL_AUDMIX_ATSTPUP1:
382 case FSL_AUDMIX_ATSTPDN1:
383 case FSL_AUDMIX_ATSTPTGT1:
384 case FSL_AUDMIX_ATTNVAL1:
385 case FSL_AUDMIX_ATSTP1:
386 return true;
387 default:
388 return false;
389 }
390 }
391
fsl_audmix_writeable_reg(struct device * dev,unsigned int reg)392 static bool fsl_audmix_writeable_reg(struct device *dev, unsigned int reg)
393 {
394 switch (reg) {
395 case FSL_AUDMIX_CTR:
396 case FSL_AUDMIX_ATCR0:
397 case FSL_AUDMIX_ATIVAL0:
398 case FSL_AUDMIX_ATSTPUP0:
399 case FSL_AUDMIX_ATSTPDN0:
400 case FSL_AUDMIX_ATSTPTGT0:
401 case FSL_AUDMIX_ATCR1:
402 case FSL_AUDMIX_ATIVAL1:
403 case FSL_AUDMIX_ATSTPUP1:
404 case FSL_AUDMIX_ATSTPDN1:
405 case FSL_AUDMIX_ATSTPTGT1:
406 return true;
407 default:
408 return false;
409 }
410 }
411
412 static const struct reg_default fsl_audmix_reg[] = {
413 { FSL_AUDMIX_CTR, 0x00060 },
414 { FSL_AUDMIX_STR, 0x00003 },
415 { FSL_AUDMIX_ATCR0, 0x00000 },
416 { FSL_AUDMIX_ATIVAL0, 0x3FFFF },
417 { FSL_AUDMIX_ATSTPUP0, 0x2AAAA },
418 { FSL_AUDMIX_ATSTPDN0, 0x30000 },
419 { FSL_AUDMIX_ATSTPTGT0, 0x00010 },
420 { FSL_AUDMIX_ATTNVAL0, 0x00000 },
421 { FSL_AUDMIX_ATSTP0, 0x00000 },
422 { FSL_AUDMIX_ATCR1, 0x00000 },
423 { FSL_AUDMIX_ATIVAL1, 0x3FFFF },
424 { FSL_AUDMIX_ATSTPUP1, 0x2AAAA },
425 { FSL_AUDMIX_ATSTPDN1, 0x30000 },
426 { FSL_AUDMIX_ATSTPTGT1, 0x00010 },
427 { FSL_AUDMIX_ATTNVAL1, 0x00000 },
428 { FSL_AUDMIX_ATSTP1, 0x00000 },
429 };
430
431 static const struct regmap_config fsl_audmix_regmap_config = {
432 .reg_bits = 32,
433 .reg_stride = 4,
434 .val_bits = 32,
435 .max_register = FSL_AUDMIX_ATSTP1,
436 .reg_defaults = fsl_audmix_reg,
437 .num_reg_defaults = ARRAY_SIZE(fsl_audmix_reg),
438 .readable_reg = fsl_audmix_readable_reg,
439 .writeable_reg = fsl_audmix_writeable_reg,
440 .cache_type = REGCACHE_FLAT,
441 };
442
443 static const struct of_device_id fsl_audmix_ids[] = {
444 {
445 .compatible = "fsl,imx8qm-audmix",
446 },
447 { /* sentinel */ }
448 };
449 MODULE_DEVICE_TABLE(of, fsl_audmix_ids);
450
fsl_audmix_probe(struct platform_device * pdev)451 static int fsl_audmix_probe(struct platform_device *pdev)
452 {
453 struct device *dev = &pdev->dev;
454 struct fsl_audmix *priv;
455 void __iomem *regs;
456 int ret;
457
458 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
459 if (!priv)
460 return -ENOMEM;
461
462 /* Get the addresses */
463 regs = devm_platform_ioremap_resource(pdev, 0);
464 if (IS_ERR(regs))
465 return PTR_ERR(regs);
466
467 priv->regmap = devm_regmap_init_mmio(dev, regs, &fsl_audmix_regmap_config);
468 if (IS_ERR(priv->regmap)) {
469 dev_err(dev, "failed to init regmap\n");
470 return PTR_ERR(priv->regmap);
471 }
472
473 priv->ipg_clk = devm_clk_get(dev, "ipg");
474 if (IS_ERR(priv->ipg_clk)) {
475 dev_err(dev, "failed to get ipg clock\n");
476 return PTR_ERR(priv->ipg_clk);
477 }
478
479 spin_lock_init(&priv->lock);
480 platform_set_drvdata(pdev, priv);
481 pm_runtime_enable(dev);
482
483 ret = devm_snd_soc_register_component(dev, &fsl_audmix_component,
484 fsl_audmix_dai,
485 ARRAY_SIZE(fsl_audmix_dai));
486 if (ret) {
487 dev_err(dev, "failed to register ASoC DAI\n");
488 goto err_disable_pm;
489 }
490
491 priv->pdev = platform_device_register_data(dev, "imx-audmix", 0, NULL, 0);
492 if (IS_ERR(priv->pdev)) {
493 ret = PTR_ERR(priv->pdev);
494 dev_err(dev, "failed to register platform: %d\n", ret);
495 goto err_disable_pm;
496 }
497
498 return 0;
499
500 err_disable_pm:
501 pm_runtime_disable(dev);
502 return ret;
503 }
504
fsl_audmix_remove(struct platform_device * pdev)505 static void fsl_audmix_remove(struct platform_device *pdev)
506 {
507 struct fsl_audmix *priv = dev_get_drvdata(&pdev->dev);
508
509 pm_runtime_disable(&pdev->dev);
510
511 if (priv->pdev)
512 platform_device_unregister(priv->pdev);
513 }
514
fsl_audmix_runtime_resume(struct device * dev)515 static int fsl_audmix_runtime_resume(struct device *dev)
516 {
517 struct fsl_audmix *priv = dev_get_drvdata(dev);
518 int ret;
519
520 ret = clk_prepare_enable(priv->ipg_clk);
521 if (ret) {
522 dev_err(dev, "Failed to enable IPG clock: %d\n", ret);
523 return ret;
524 }
525
526 regcache_cache_only(priv->regmap, false);
527 regcache_mark_dirty(priv->regmap);
528
529 return regcache_sync(priv->regmap);
530 }
531
fsl_audmix_runtime_suspend(struct device * dev)532 static int fsl_audmix_runtime_suspend(struct device *dev)
533 {
534 struct fsl_audmix *priv = dev_get_drvdata(dev);
535
536 regcache_cache_only(priv->regmap, true);
537
538 clk_disable_unprepare(priv->ipg_clk);
539
540 return 0;
541 }
542
543 static const struct dev_pm_ops fsl_audmix_pm = {
544 RUNTIME_PM_OPS(fsl_audmix_runtime_suspend, fsl_audmix_runtime_resume,
545 NULL)
546 SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, pm_runtime_force_resume)
547 };
548
549 static struct platform_driver fsl_audmix_driver = {
550 .probe = fsl_audmix_probe,
551 .remove = fsl_audmix_remove,
552 .driver = {
553 .name = "fsl-audmix",
554 .of_match_table = fsl_audmix_ids,
555 .pm = pm_ptr(&fsl_audmix_pm),
556 },
557 };
558 module_platform_driver(fsl_audmix_driver);
559
560 MODULE_DESCRIPTION("NXP AUDMIX ASoC DAI driver");
561 MODULE_AUTHOR("Viorel Suman <viorel.suman@nxp.com>");
562 MODULE_ALIAS("platform:fsl-audmix");
563 MODULE_LICENSE("GPL v2");
564