diff options
| author | Peter Ujfalusi <peter.ujfalusi@ti.com> | 2014-09-29 15:42:25 +0000 |
|---|---|---|
| committer | Darren Etheridge <detheridge@ti.com> | 2014-09-30 09:08:07 -0500 |
| commit | d74e81809b984580594445d825a14637af8263a1 (patch) | |
| tree | d68d54ad095bb56bb46f686b7f1575bd8bc2b914 /sound | |
| parent | 7e4752edc4db726e228449cd7d71b664fc331fad (diff) | |
ASoC: davinci-mcasp: Save and restore the serializer registers on suspend
If the board is suspended to a deep sleep state McASP is going to loose it's
context. We also need to save and restore the configuration of the McASP
serializers.
Since the number of serializers depend on the SoC we need to allocate the
memory for them dynamically.
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Darren Etheridge <detheridge@ti.com>
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/soc/davinci/davinci-mcasp.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/sound/soc/davinci/davinci-mcasp.c b/sound/soc/davinci/davinci-mcasp.c index 98bbf36fee4..4ba09b73019 100644 --- a/sound/soc/davinci/davinci-mcasp.c +++ b/sound/soc/davinci/davinci-mcasp.c @@ -58,6 +58,7 @@ struct davinci_mcasp_context { u32 txtdm; u32 rfifoctl; u32 wfifoctl; + u32 *xrsrctl; }; struct davinci_mcasp { @@ -873,6 +874,7 @@ static int davinci_mcasp_suspend(struct snd_soc_dai *dai) { struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(dai); struct davinci_mcasp_context *context = &mcasp->context; + int i; u32 reg; context->txfmtctl = mcasp_get_reg(mcasp, DAVINCI_MCASP_TXFMCTL_REG); @@ -896,6 +898,9 @@ static int davinci_mcasp_suspend(struct snd_soc_dai *dai) reg = mcasp->fifo_base + MCASP_RFIFOCTL_OFFSET; context->rfifoctl = mcasp_get_reg(mcasp, reg); } + for (i = 0; i < mcasp->num_serializer; i++) + context->xrsrctl[i] = mcasp_get_reg(mcasp, + DAVINCI_MCASP_XRSRCTL_REG(i)); return 0; } @@ -904,6 +909,7 @@ static int davinci_mcasp_resume(struct snd_soc_dai *dai) { struct davinci_mcasp *mcasp = snd_soc_dai_get_drvdata(dai); struct davinci_mcasp_context *context = &mcasp->context; + int i; u32 reg; mcasp_set_reg(mcasp, DAVINCI_MCASP_TXFMCTL_REG, context->txfmtctl); @@ -927,6 +933,9 @@ static int davinci_mcasp_resume(struct snd_soc_dai *dai) reg = mcasp->fifo_base + MCASP_RFIFOCTL_OFFSET; mcasp_set_reg(mcasp, reg, context->rfifoctl); } + for (i = 0; i < mcasp->num_serializer; i++) + mcasp_set_reg(mcasp, DAVINCI_MCASP_XRSRCTL_REG(i), + context->xrsrctl[i]); return 0; } @@ -1245,6 +1254,11 @@ static int davinci_mcasp_probe(struct platform_device *pdev) mcasp->op_mode = pdata->op_mode; mcasp->tdm_slots = pdata->tdm_slots; mcasp->num_serializer = pdata->num_serializer; +#ifdef CONFIG_PM_SLEEP + mcasp->context.xrsrctl = devm_kzalloc(&pdev->dev, + sizeof(u32) * mcasp->num_serializer, + GFP_KERNEL); +#endif mcasp->serial_dir = pdata->serial_dir; mcasp->version = pdata->version; mcasp->txnumevt = pdata->txnumevt; |