diff options
| author | Nicolin Chen <b42378@freescale.com> | 2013-08-05 15:07:21 +0800 |
|---|---|---|
| committer | Jason Liu <r64343@freescale.com> | 2013-08-23 07:30:07 +0800 |
| commit | a7093abd1e1186da195666a0c932409ca74f913b (patch) | |
| tree | 469e41177e0dd80509d181cfddf8857293756202 /sound | |
| parent | 046dae5f01743e0414110110181934d56409ebbb (diff) | |
ENGR00273838-5 ASoC: fsl: Add clock control for ssi
Enable core clock when startup and disable it when shutdown to save power.
Acked-by: Wang Shengjiu <b02247@freescale.com>
Signed-off-by: Nicolin Chen <b42378@freescale.com>
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/soc/fsl/fsl_ssi.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/sound/soc/fsl/fsl_ssi.c b/sound/soc/fsl/fsl_ssi.c index 7cef35d9af60..70df5a0caca7 100644 --- a/sound/soc/fsl/fsl_ssi.c +++ b/sound/soc/fsl/fsl_ssi.c @@ -330,6 +330,8 @@ static int fsl_ssi_startup(struct snd_pcm_substream *substream, snd_soc_dai_get_drvdata(rtd->cpu_dai); int synchronous = ssi_private->cpu_dai_drv.symmetric_rates; + clk_enable(ssi_private->clk); + /* * If this is the first stream opened, then request the IRQ * and initialize the SSI registers. @@ -573,6 +575,8 @@ static void fsl_ssi_shutdown(struct snd_pcm_substream *substream, ssi_private->second_stream = NULL; + clk_disable(ssi_private->clk); + /* If this is the last active substream, disable the interrupts. */ if (!ssi_private->first_stream) { struct ccsr_ssi __iomem *ssi = ssi_private->ssi; @@ -779,7 +783,7 @@ static int fsl_ssi_probe(struct platform_device *pdev) dev_err(&pdev->dev, "could not get clock: %d\n", ret); goto error_irq; } - clk_prepare_enable(ssi_private->clk); + clk_prepare(ssi_private->clk); /* * We have burstsize be "fifo_depth - 2" to match the SSI @@ -872,7 +876,7 @@ error_dev: device_remove_file(&pdev->dev, dev_attr); if (ssi_private->ssi_on_imx) { - clk_disable_unprepare(ssi_private->clk); + clk_unprepare(ssi_private->clk); clk_put(ssi_private->clk); } @@ -899,7 +903,7 @@ static int fsl_ssi_remove(struct platform_device *pdev) platform_device_unregister(ssi_private->pdev); if (ssi_private->ssi_on_imx) { imx_pcm_dma_exit(pdev); - clk_disable_unprepare(ssi_private->clk); + clk_unprepare(ssi_private->clk); clk_put(ssi_private->clk); } snd_soc_unregister_component(&pdev->dev); |