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>

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);