1 // SPDX-License-Identifier: GPL-2.0
5 #include <linux/device.h>
6 #include <linux/interrupt.h>
7 #include <linux/kobject.h>
8 #include <linux/kernel.h>
9 #include <linux/module.h>
11 #include <linux/of_address.h>
12 #include <linux/of_irq.h>
13 #include <linux/of_platform.h>
14 #include <linux/pm_runtime.h>
15 #include <linux/regmap.h>
16 #include <linux/sysfs.h>
17 #include <linux/types.h>
18 #include <sound/dmaengine_pcm.h>
19 #include <sound/pcm.h>
20 #include <sound/soc.h>
21 #include <sound/tlv.h>
22 #include <sound/core.h>
24 #include "fsl_micfil.h"
27 #define FSL_MICFIL_RATES SNDRV_PCM_RATE_8000_48000
28 #define FSL_MICFIL_FORMATS (SNDRV_PCM_FMTBIT_S16_LE)
31 struct platform_device *pdev;
32 struct regmap *regmap;
33 const struct fsl_micfil_soc_data *soc;
35 struct snd_dmaengine_dai_dma_data dma_params_rx;
36 unsigned int dataline;
38 int irq[MICFIL_IRQ_LINES];
39 unsigned int mclk_streams;
40 int quality; /*QUALITY 2-0 bits */
45 struct fsl_micfil_soc_data {
47 unsigned int fifo_depth;
48 unsigned int dataline;
52 static struct fsl_micfil_soc_data fsl_micfil_imx8mm = {
59 static const struct of_device_id fsl_micfil_dt_ids[] = {
60 { .compatible = "fsl,imx8mm-micfil", .data = &fsl_micfil_imx8mm },
63 MODULE_DEVICE_TABLE(of, fsl_micfil_dt_ids);
65 /* Table 5. Quality Modes
73 static const char * const micfil_quality_select_texts[] = {
80 static const struct soc_enum fsl_micfil_quality_enum =
81 SOC_ENUM_SINGLE(REG_MICFIL_CTRL2,
82 MICFIL_CTRL2_QSEL_SHIFT,
83 ARRAY_SIZE(micfil_quality_select_texts),
84 micfil_quality_select_texts);
86 static DECLARE_TLV_DB_SCALE(gain_tlv, 0, 100, 0);
88 static const struct snd_kcontrol_new fsl_micfil_snd_controls[] = {
89 SOC_SINGLE_SX_TLV("CH0 Volume", REG_MICFIL_OUT_CTRL,
90 MICFIL_OUTGAIN_CHX_SHIFT(0), 0xF, 0x7, gain_tlv),
91 SOC_SINGLE_SX_TLV("CH1 Volume", REG_MICFIL_OUT_CTRL,
92 MICFIL_OUTGAIN_CHX_SHIFT(1), 0xF, 0x7, gain_tlv),
93 SOC_SINGLE_SX_TLV("CH2 Volume", REG_MICFIL_OUT_CTRL,
94 MICFIL_OUTGAIN_CHX_SHIFT(2), 0xF, 0x7, gain_tlv),
95 SOC_SINGLE_SX_TLV("CH3 Volume", REG_MICFIL_OUT_CTRL,
96 MICFIL_OUTGAIN_CHX_SHIFT(3), 0xF, 0x7, gain_tlv),
97 SOC_SINGLE_SX_TLV("CH4 Volume", REG_MICFIL_OUT_CTRL,
98 MICFIL_OUTGAIN_CHX_SHIFT(4), 0xF, 0x7, gain_tlv),
99 SOC_SINGLE_SX_TLV("CH5 Volume", REG_MICFIL_OUT_CTRL,
100 MICFIL_OUTGAIN_CHX_SHIFT(5), 0xF, 0x7, gain_tlv),
101 SOC_SINGLE_SX_TLV("CH6 Volume", REG_MICFIL_OUT_CTRL,
102 MICFIL_OUTGAIN_CHX_SHIFT(6), 0xF, 0x7, gain_tlv),
103 SOC_SINGLE_SX_TLV("CH7 Volume", REG_MICFIL_OUT_CTRL,
104 MICFIL_OUTGAIN_CHX_SHIFT(7), 0xF, 0x7, gain_tlv),
105 SOC_ENUM_EXT("MICFIL Quality Select",
106 fsl_micfil_quality_enum,
107 snd_soc_get_enum_double, snd_soc_put_enum_double),
110 static inline int get_pdm_clk(struct fsl_micfil *micfil,
117 regmap_read(micfil->regmap, REG_MICFIL_CTRL2, &ctrl2_reg);
118 osr = 16 - ((ctrl2_reg & MICFIL_CTRL2_CICOSR_MASK)
119 >> MICFIL_CTRL2_CICOSR_SHIFT);
121 regmap_read(micfil->regmap, REG_MICFIL_CTRL2, &ctrl2_reg);
122 qsel = ctrl2_reg & MICFIL_CTRL2_QSEL_MASK;
125 case MICFIL_HIGH_QUALITY:
126 bclk = rate * 8 * osr / 2; /* kfactor = 0.5 */
128 case MICFIL_MEDIUM_QUALITY:
129 case MICFIL_VLOW0_QUALITY:
130 bclk = rate * 4 * osr * 1; /* kfactor = 1 */
132 case MICFIL_LOW_QUALITY:
133 case MICFIL_VLOW1_QUALITY:
134 bclk = rate * 2 * osr * 2; /* kfactor = 2 */
136 case MICFIL_VLOW2_QUALITY:
137 bclk = rate * osr * 4; /* kfactor = 4 */
140 dev_err(&micfil->pdev->dev,
141 "Please make sure you select a valid quality.\n");
149 static inline int get_clk_div(struct fsl_micfil *micfil,
156 regmap_read(micfil->regmap, REG_MICFIL_CTRL2, &ctrl2_reg);
158 mclk_rate = clk_get_rate(micfil->mclk);
160 clk_div = mclk_rate / (get_pdm_clk(micfil, rate) * 2);
165 /* The SRES is a self-negated bit which provides the CPU with the
166 * capability to initialize the PDM Interface module through the
167 * slave-bus interface. This bit always reads as zero, and this
168 * bit is only effective when MDIS is cleared
170 static int fsl_micfil_reset(struct device *dev)
172 struct fsl_micfil *micfil = dev_get_drvdata(dev);
175 ret = regmap_update_bits(micfil->regmap,
177 MICFIL_CTRL1_MDIS_MASK,
180 dev_err(dev, "failed to clear MDIS bit %d\n", ret);
184 ret = regmap_update_bits(micfil->regmap,
186 MICFIL_CTRL1_SRES_MASK,
189 dev_err(dev, "failed to reset MICFIL: %d\n", ret);
196 static int fsl_micfil_set_mclk_rate(struct fsl_micfil *micfil,
199 struct device *dev = &micfil->pdev->dev;
202 clk_disable_unprepare(micfil->mclk);
204 ret = clk_set_rate(micfil->mclk, freq * 1024);
206 dev_warn(dev, "failed to set rate (%u): %d\n",
209 clk_prepare_enable(micfil->mclk);
214 static int fsl_micfil_startup(struct snd_pcm_substream *substream,
215 struct snd_soc_dai *dai)
217 struct fsl_micfil *micfil = snd_soc_dai_get_drvdata(dai);
220 dev_err(dai->dev, "micfil dai priv_data not set\n");
227 static int fsl_micfil_trigger(struct snd_pcm_substream *substream, int cmd,
228 struct snd_soc_dai *dai)
230 struct fsl_micfil *micfil = snd_soc_dai_get_drvdata(dai);
231 struct device *dev = &micfil->pdev->dev;
235 case SNDRV_PCM_TRIGGER_START:
236 case SNDRV_PCM_TRIGGER_RESUME:
237 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
238 ret = fsl_micfil_reset(dev);
240 dev_err(dev, "failed to soft reset\n");
244 /* DMA Interrupt Selection - DISEL bits
245 * 00 - DMA and IRQ disabled
246 * 01 - DMA req enabled
250 ret = regmap_update_bits(micfil->regmap, REG_MICFIL_CTRL1,
251 MICFIL_CTRL1_DISEL_MASK,
252 (1 << MICFIL_CTRL1_DISEL_SHIFT));
254 dev_err(dev, "failed to update DISEL bits\n");
258 /* Enable the module */
259 ret = regmap_update_bits(micfil->regmap, REG_MICFIL_CTRL1,
260 MICFIL_CTRL1_PDMIEN_MASK,
261 MICFIL_CTRL1_PDMIEN);
263 dev_err(dev, "failed to enable the module\n");
268 case SNDRV_PCM_TRIGGER_STOP:
269 case SNDRV_PCM_TRIGGER_SUSPEND:
270 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
271 /* Disable the module */
272 ret = regmap_update_bits(micfil->regmap, REG_MICFIL_CTRL1,
273 MICFIL_CTRL1_PDMIEN_MASK,
276 dev_err(dev, "failed to enable the module\n");
280 ret = regmap_update_bits(micfil->regmap, REG_MICFIL_CTRL1,
281 MICFIL_CTRL1_DISEL_MASK,
282 (0 << MICFIL_CTRL1_DISEL_SHIFT));
284 dev_err(dev, "failed to update DISEL bits\n");
294 static int fsl_set_clock_params(struct device *dev, unsigned int rate)
296 struct fsl_micfil *micfil = dev_get_drvdata(dev);
300 ret = fsl_micfil_set_mclk_rate(micfil, rate);
302 dev_err(dev, "failed to set mclk[%lu] to rate %u\n",
303 clk_get_rate(micfil->mclk), rate);
306 ret |= regmap_update_bits(micfil->regmap, REG_MICFIL_CTRL2,
307 MICFIL_CTRL2_CICOSR_MASK,
308 MICFIL_CTRL2_OSR_DEFAULT);
310 dev_err(dev, "failed to set CICOSR in reg 0x%X\n",
314 clk_div = get_clk_div(micfil, rate);
318 ret |= regmap_update_bits(micfil->regmap, REG_MICFIL_CTRL2,
319 MICFIL_CTRL2_CLKDIV_MASK, clk_div);
321 dev_err(dev, "failed to set CLKDIV in reg 0x%X\n",
327 static int fsl_micfil_hw_params(struct snd_pcm_substream *substream,
328 struct snd_pcm_hw_params *params,
329 struct snd_soc_dai *dai)
331 struct fsl_micfil *micfil = snd_soc_dai_get_drvdata(dai);
332 unsigned int channels = params_channels(params);
333 unsigned int rate = params_rate(params);
334 struct device *dev = &micfil->pdev->dev;
337 /* 1. Disable the module */
338 ret = regmap_update_bits(micfil->regmap, REG_MICFIL_CTRL1,
339 MICFIL_CTRL1_PDMIEN_MASK, 0);
341 dev_err(dev, "failed to disable the module\n");
345 /* enable channels */
346 ret = regmap_update_bits(micfil->regmap, REG_MICFIL_CTRL1,
347 0xFF, ((1 << channels) - 1));
349 dev_err(dev, "failed to enable channels %d, reg 0x%X\n", ret,
354 ret = fsl_set_clock_params(dev, rate);
356 dev_err(dev, "Failed to set clock parameters [%d]\n", ret);
360 micfil->dma_params_rx.maxburst = channels * MICFIL_DMA_MAXBURST_RX;
365 static int fsl_micfil_set_dai_sysclk(struct snd_soc_dai *dai, int clk_id,
366 unsigned int freq, int dir)
368 struct fsl_micfil *micfil = snd_soc_dai_get_drvdata(dai);
369 struct device *dev = &micfil->pdev->dev;
376 ret = fsl_micfil_set_mclk_rate(micfil, freq);
378 dev_err(dev, "failed to set mclk[%lu] to rate %u\n",
379 clk_get_rate(micfil->mclk), freq);
384 static struct snd_soc_dai_ops fsl_micfil_dai_ops = {
385 .startup = fsl_micfil_startup,
386 .trigger = fsl_micfil_trigger,
387 .hw_params = fsl_micfil_hw_params,
388 .set_sysclk = fsl_micfil_set_dai_sysclk,
391 static int fsl_micfil_dai_probe(struct snd_soc_dai *cpu_dai)
393 struct fsl_micfil *micfil = dev_get_drvdata(cpu_dai->dev);
394 struct device *dev = cpu_dai->dev;
399 /* set qsel to medium */
400 ret = regmap_update_bits(micfil->regmap, REG_MICFIL_CTRL2,
401 MICFIL_CTRL2_QSEL_MASK, MICFIL_MEDIUM_QUALITY);
403 dev_err(dev, "failed to set quality mode bits, reg 0x%X\n",
408 /* set default gain to max_gain */
409 regmap_write(micfil->regmap, REG_MICFIL_OUT_CTRL, 0x77777777);
410 for (i = 0; i < 8; i++)
411 micfil->channel_gain[i] = 0xF;
413 snd_soc_dai_init_dma_data(cpu_dai, NULL,
414 &micfil->dma_params_rx);
416 /* FIFO Watermark Control - FIFOWMK*/
417 val = MICFIL_FIFO_CTRL_FIFOWMK(micfil->soc->fifo_depth) - 1;
418 ret = regmap_update_bits(micfil->regmap, REG_MICFIL_FIFO_CTRL,
419 MICFIL_FIFO_CTRL_FIFOWMK_MASK,
422 dev_err(dev, "failed to set FIFOWMK\n");
426 snd_soc_dai_set_drvdata(cpu_dai, micfil);
431 static struct snd_soc_dai_driver fsl_micfil_dai = {
432 .probe = fsl_micfil_dai_probe,
434 .stream_name = "CPU-Capture",
437 .rates = FSL_MICFIL_RATES,
438 .formats = FSL_MICFIL_FORMATS,
440 .ops = &fsl_micfil_dai_ops,
443 static const struct snd_soc_component_driver fsl_micfil_component = {
444 .name = "fsl-micfil-dai",
445 .controls = fsl_micfil_snd_controls,
446 .num_controls = ARRAY_SIZE(fsl_micfil_snd_controls),
451 static const struct reg_default fsl_micfil_reg_defaults[] = {
452 {REG_MICFIL_CTRL1, 0x00000000},
453 {REG_MICFIL_CTRL2, 0x00000000},
454 {REG_MICFIL_STAT, 0x00000000},
455 {REG_MICFIL_FIFO_CTRL, 0x00000007},
456 {REG_MICFIL_FIFO_STAT, 0x00000000},
457 {REG_MICFIL_DATACH0, 0x00000000},
458 {REG_MICFIL_DATACH1, 0x00000000},
459 {REG_MICFIL_DATACH2, 0x00000000},
460 {REG_MICFIL_DATACH3, 0x00000000},
461 {REG_MICFIL_DATACH4, 0x00000000},
462 {REG_MICFIL_DATACH5, 0x00000000},
463 {REG_MICFIL_DATACH6, 0x00000000},
464 {REG_MICFIL_DATACH7, 0x00000000},
465 {REG_MICFIL_DC_CTRL, 0x00000000},
466 {REG_MICFIL_OUT_CTRL, 0x00000000},
467 {REG_MICFIL_OUT_STAT, 0x00000000},
468 {REG_MICFIL_VAD0_CTRL1, 0x00000000},
469 {REG_MICFIL_VAD0_CTRL2, 0x000A0000},
470 {REG_MICFIL_VAD0_STAT, 0x00000000},
471 {REG_MICFIL_VAD0_SCONFIG, 0x00000000},
472 {REG_MICFIL_VAD0_NCONFIG, 0x80000000},
473 {REG_MICFIL_VAD0_NDATA, 0x00000000},
474 {REG_MICFIL_VAD0_ZCD, 0x00000004},
477 static bool fsl_micfil_readable_reg(struct device *dev, unsigned int reg)
480 case REG_MICFIL_CTRL1:
481 case REG_MICFIL_CTRL2:
482 case REG_MICFIL_STAT:
483 case REG_MICFIL_FIFO_CTRL:
484 case REG_MICFIL_FIFO_STAT:
485 case REG_MICFIL_DATACH0:
486 case REG_MICFIL_DATACH1:
487 case REG_MICFIL_DATACH2:
488 case REG_MICFIL_DATACH3:
489 case REG_MICFIL_DATACH4:
490 case REG_MICFIL_DATACH5:
491 case REG_MICFIL_DATACH6:
492 case REG_MICFIL_DATACH7:
493 case REG_MICFIL_DC_CTRL:
494 case REG_MICFIL_OUT_CTRL:
495 case REG_MICFIL_OUT_STAT:
496 case REG_MICFIL_VAD0_CTRL1:
497 case REG_MICFIL_VAD0_CTRL2:
498 case REG_MICFIL_VAD0_STAT:
499 case REG_MICFIL_VAD0_SCONFIG:
500 case REG_MICFIL_VAD0_NCONFIG:
501 case REG_MICFIL_VAD0_NDATA:
502 case REG_MICFIL_VAD0_ZCD:
509 static bool fsl_micfil_writeable_reg(struct device *dev, unsigned int reg)
512 case REG_MICFIL_CTRL1:
513 case REG_MICFIL_CTRL2:
514 case REG_MICFIL_STAT: /* Write 1 to Clear */
515 case REG_MICFIL_FIFO_CTRL:
516 case REG_MICFIL_FIFO_STAT: /* Write 1 to Clear */
517 case REG_MICFIL_DC_CTRL:
518 case REG_MICFIL_OUT_CTRL:
519 case REG_MICFIL_OUT_STAT: /* Write 1 to Clear */
520 case REG_MICFIL_VAD0_CTRL1:
521 case REG_MICFIL_VAD0_CTRL2:
522 case REG_MICFIL_VAD0_STAT: /* Write 1 to Clear */
523 case REG_MICFIL_VAD0_SCONFIG:
524 case REG_MICFIL_VAD0_NCONFIG:
525 case REG_MICFIL_VAD0_ZCD:
532 static bool fsl_micfil_volatile_reg(struct device *dev, unsigned int reg)
535 case REG_MICFIL_STAT:
536 case REG_MICFIL_DATACH0:
537 case REG_MICFIL_DATACH1:
538 case REG_MICFIL_DATACH2:
539 case REG_MICFIL_DATACH3:
540 case REG_MICFIL_DATACH4:
541 case REG_MICFIL_DATACH5:
542 case REG_MICFIL_DATACH6:
543 case REG_MICFIL_DATACH7:
544 case REG_MICFIL_VAD0_STAT:
545 case REG_MICFIL_VAD0_NDATA:
552 static const struct regmap_config fsl_micfil_regmap_config = {
557 .max_register = REG_MICFIL_VAD0_ZCD,
558 .reg_defaults = fsl_micfil_reg_defaults,
559 .num_reg_defaults = ARRAY_SIZE(fsl_micfil_reg_defaults),
560 .readable_reg = fsl_micfil_readable_reg,
561 .volatile_reg = fsl_micfil_volatile_reg,
562 .writeable_reg = fsl_micfil_writeable_reg,
563 .cache_type = REGCACHE_RBTREE,
568 static irqreturn_t micfil_isr(int irq, void *devid)
570 struct fsl_micfil *micfil = (struct fsl_micfil *)devid;
571 struct platform_device *pdev = micfil->pdev;
578 regmap_read(micfil->regmap, REG_MICFIL_STAT, &stat_reg);
579 regmap_read(micfil->regmap, REG_MICFIL_CTRL1, &ctrl1_reg);
580 regmap_read(micfil->regmap, REG_MICFIL_FIFO_STAT, &fifo_stat_reg);
582 dma_enabled = MICFIL_DMA_ENABLED(ctrl1_reg);
584 /* Channel 0-7 Output Data Flags */
585 for (i = 0; i < MICFIL_OUTPUT_CHANNELS; i++) {
586 if (stat_reg & MICFIL_STAT_CHXF_MASK(i))
588 "Data available in Data Channel %d\n", i);
589 /* if DMA is not enabled, field must be written with 1
593 regmap_write_bits(micfil->regmap,
595 MICFIL_STAT_CHXF_MASK(i),
599 for (i = 0; i < MICFIL_FIFO_NUM; i++) {
600 if (fifo_stat_reg & MICFIL_FIFO_STAT_FIFOX_OVER_MASK(i))
602 "FIFO Overflow Exception flag for channel %d\n",
605 if (fifo_stat_reg & MICFIL_FIFO_STAT_FIFOX_UNDER_MASK(i))
607 "FIFO Underflow Exception flag for channel %d\n",
614 static irqreturn_t micfil_err_isr(int irq, void *devid)
616 struct fsl_micfil *micfil = (struct fsl_micfil *)devid;
617 struct platform_device *pdev = micfil->pdev;
620 regmap_read(micfil->regmap, REG_MICFIL_STAT, &stat_reg);
622 if (stat_reg & MICFIL_STAT_BSY_FIL_MASK)
623 dev_dbg(&pdev->dev, "isr: Decimation Filter is running\n");
625 if (stat_reg & MICFIL_STAT_FIR_RDY_MASK)
626 dev_dbg(&pdev->dev, "isr: FIR Filter Data ready\n");
628 if (stat_reg & MICFIL_STAT_LOWFREQF_MASK) {
629 dev_dbg(&pdev->dev, "isr: ipg_clk_app is too low\n");
630 regmap_write_bits(micfil->regmap, REG_MICFIL_STAT,
631 MICFIL_STAT_LOWFREQF_MASK, 1);
637 static int fsl_micfil_probe(struct platform_device *pdev)
639 struct device_node *np = pdev->dev.of_node;
640 const struct of_device_id *of_id;
641 struct fsl_micfil *micfil;
642 struct resource *res;
645 unsigned long irqflag = 0;
647 micfil = devm_kzalloc(&pdev->dev, sizeof(*micfil), GFP_KERNEL);
652 strncpy(micfil->name, np->name, sizeof(micfil->name) - 1);
654 of_id = of_match_device(fsl_micfil_dt_ids, &pdev->dev);
655 if (!of_id || !of_id->data)
658 micfil->soc = of_id->data;
660 /* ipg_clk is used to control the registers
661 * ipg_clk_app is used to operate the filter
663 micfil->mclk = devm_clk_get(&pdev->dev, "ipg_clk_app");
664 if (IS_ERR(micfil->mclk)) {
665 dev_err(&pdev->dev, "failed to get core clock: %ld\n",
666 PTR_ERR(micfil->mclk));
667 return PTR_ERR(micfil->mclk);
671 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
672 regs = devm_ioremap_resource(&pdev->dev, res);
674 return PTR_ERR(regs);
676 micfil->regmap = devm_regmap_init_mmio_clk(&pdev->dev,
679 &fsl_micfil_regmap_config);
680 if (IS_ERR(micfil->regmap)) {
681 dev_err(&pdev->dev, "failed to init MICFIL regmap: %ld\n",
682 PTR_ERR(micfil->regmap));
683 return PTR_ERR(micfil->regmap);
686 /* dataline mask for RX */
687 ret = of_property_read_u32_index(np,
692 micfil->dataline = 1;
694 if (micfil->dataline & ~micfil->soc->dataline) {
695 dev_err(&pdev->dev, "dataline setting error, Mask is 0x%X\n",
696 micfil->soc->dataline);
701 for (i = 0; i < MICFIL_IRQ_LINES; i++) {
702 micfil->irq[i] = platform_get_irq(pdev, i);
703 dev_err(&pdev->dev, "GET IRQ: %d\n", micfil->irq[i]);
704 if (micfil->irq[i] < 0)
705 return micfil->irq[i];
708 if (of_property_read_bool(np, "fsl,shared-interrupt"))
709 irqflag = IRQF_SHARED;
711 /* Digital Microphone interface interrupt */
712 ret = devm_request_irq(&pdev->dev, micfil->irq[0],
714 micfil->name, micfil);
716 dev_err(&pdev->dev, "failed to claim mic interface irq %u\n",
721 /* Digital Microphone interface error interrupt */
722 ret = devm_request_irq(&pdev->dev, micfil->irq[1],
723 micfil_err_isr, irqflag,
724 micfil->name, micfil);
726 dev_err(&pdev->dev, "failed to claim mic interface error irq %u\n",
731 micfil->dma_params_rx.chan_name = "rx";
732 micfil->dma_params_rx.addr = res->start + REG_MICFIL_DATACH0;
733 micfil->dma_params_rx.maxburst = MICFIL_DMA_MAXBURST_RX;
736 platform_set_drvdata(pdev, micfil);
738 pm_runtime_enable(&pdev->dev);
740 ret = devm_snd_soc_register_component(&pdev->dev, &fsl_micfil_component,
743 dev_err(&pdev->dev, "failed to register component %s\n",
744 fsl_micfil_component.name);
748 ret = devm_snd_dmaengine_pcm_register(&pdev->dev, NULL, 0);
750 dev_err(&pdev->dev, "failed to pcm register\n");
755 static int __maybe_unused fsl_micfil_runtime_suspend(struct device *dev)
757 struct fsl_micfil *micfil = dev_get_drvdata(dev);
759 regcache_cache_only(micfil->regmap, true);
761 clk_disable_unprepare(micfil->mclk);
766 static int __maybe_unused fsl_micfil_runtime_resume(struct device *dev)
768 struct fsl_micfil *micfil = dev_get_drvdata(dev);
771 ret = clk_prepare_enable(micfil->mclk);
775 regcache_cache_only(micfil->regmap, false);
776 regcache_mark_dirty(micfil->regmap);
777 regcache_sync(micfil->regmap);
782 static int __maybe_unused fsl_micfil_suspend(struct device *dev)
784 pm_runtime_force_suspend(dev);
789 static int __maybe_unused fsl_micfil_resume(struct device *dev)
791 pm_runtime_force_resume(dev);
796 static const struct dev_pm_ops fsl_micfil_pm_ops = {
797 SET_RUNTIME_PM_OPS(fsl_micfil_runtime_suspend,
798 fsl_micfil_runtime_resume,
800 SET_SYSTEM_SLEEP_PM_OPS(fsl_micfil_suspend,
804 static struct platform_driver fsl_micfil_driver = {
805 .probe = fsl_micfil_probe,
807 .name = "fsl-micfil-dai",
808 .pm = &fsl_micfil_pm_ops,
809 .of_match_table = fsl_micfil_dt_ids,
812 module_platform_driver(fsl_micfil_driver);
814 MODULE_AUTHOR("Cosmin-Gabriel Samoila <cosmin.samoila@nxp.com>");
815 MODULE_DESCRIPTION("NXP PDM Microphone Interface (MICFIL) driver");
816 MODULE_LICENSE("GPL v2");