ASoC: atmel-pcm-pdc: Remove broken suspend/resume code

Suspend/resume support for the atmel-pcm-pdc driver was broken in commit
f0fba2ad1 ("ASoC: multi-component - ASoC Multi-Component Support"). It
essentially reverted the modifications done in commit 10cab262 ("ASoC: Change
how suspend and resume obtain the PCM runtime"). The suspend and resume handlers
at the beginning check if dai->runtime is not NULL, but dai->runtime is always
NULL, hence the code never runs. Considering that nobody noticed any problems in
the last 4 years since the code was broken and that the driver does not set
SNDRV_PCM_INFO_RESUME, which means applications are expected to stop and restart
the audio stream during suspend/resume, it is probably safe to assume that his
code is not needed and can be removed.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Mark Brown <broonie@linaro.org>

diff --git a/sound/soc/atmel/atmel-pcm-pdc.c b/sound/soc/atmel/atmel-pcm-pdc.c
index 33ec592..a366b35 100644 (file)
--- a/sound/soc/atmel/atmel-pcm-pdc.c
+++ b/sound/soc/atmel/atmel-pcm-pdc.c
@@ -76,12 +76,6 @@ struct atmel_runtime_data {
        size_t period_size;
 
        dma_addr_t period_ptr;          /* physical address of next period */
-
-       /* PDC register save */
-       u32 pdc_xpr_save;
-       u32 pdc_xcr_save;
-       u32 pdc_xnpr_save;
-       u32 pdc_xncr_save;
 };
 
 /*--------------------------------------------------------------------------*\
@@ -320,67 +314,10 @@ static struct snd_pcm_ops atmel_pcm_ops = {
        .mmap           = atmel_pcm_mmap,
 };
 
-
-/*--------------------------------------------------------------------------*\
- * ASoC platform driver
-\*--------------------------------------------------------------------------*/
-#ifdef CONFIG_PM
-static int atmel_pcm_suspend(struct snd_soc_dai *dai)
-{
-       struct snd_pcm_runtime *runtime = dai->runtime;
-       struct atmel_runtime_data *prtd;
-       struct atmel_pcm_dma_params *params;
-
-       if (!runtime)
-               return 0;
-
-       prtd = runtime->private_data;
-       params = prtd->params;
-
-       /* disable the PDC and save the PDC registers */
-
-       ssc_writel(params->ssc->regs, PDC_PTCR, params->mask->pdc_disable);
-
-       prtd->pdc_xpr_save = ssc_readx(params->ssc->regs, params->pdc->xpr);
-       prtd->pdc_xcr_save = ssc_readx(params->ssc->regs, params->pdc->xcr);
-       prtd->pdc_xnpr_save = ssc_readx(params->ssc->regs, params->pdc->xnpr);
-       prtd->pdc_xncr_save = ssc_readx(params->ssc->regs, params->pdc->xncr);
-
-       return 0;
-}
-
-static int atmel_pcm_resume(struct snd_soc_dai *dai)
-{
-       struct snd_pcm_runtime *runtime = dai->runtime;
-       struct atmel_runtime_data *prtd;
-       struct atmel_pcm_dma_params *params;
-
-       if (!runtime)
-               return 0;
-
-       prtd = runtime->private_data;
-       params = prtd->params;
-
-       /* restore the PDC registers and enable the PDC */
-       ssc_writex(params->ssc->regs, params->pdc->xpr, prtd->pdc_xpr_save);
-       ssc_writex(params->ssc->regs, params->pdc->xcr, prtd->pdc_xcr_save);
-       ssc_writex(params->ssc->regs, params->pdc->xnpr, prtd->pdc_xnpr_save);
-       ssc_writex(params->ssc->regs, params->pdc->xncr, prtd->pdc_xncr_save);
-
-       ssc_writel(params->ssc->regs, PDC_PTCR, params->mask->pdc_enable);
-       return 0;
-}
-#else
-#define atmel_pcm_suspend      NULL
-#define atmel_pcm_resume       NULL
-#endif
-
 static struct snd_soc_platform_driver atmel_soc_platform = {
        .ops            = &atmel_pcm_ops,
        .pcm_new        = atmel_pcm_new,
        .pcm_free       = atmel_pcm_free,
-       .suspend        = atmel_pcm_suspend,
-       .resume         = atmel_pcm_resume,
 };
 
 int atmel_pcm_pdc_platform_register(struct device *dev)