ENGR00310878-1 Asoc: fsl: refine clock tree for ESAI

There are three clock for ESAI, esai_extal, esai_ipg, esai_mem.
Make the clock for ESAI more clear.

Signed-off-by: Shengjiu Wang <b02247@freescale.com>

2 files changed, 10 insertions, 0 deletions

diff --git a/sound/soc/fsl/fsl_esai.c b/sound/soc/fsl/fsl_esai.c
index 762ac316fa32..0f9282cc5acf 100644
--- a/sound/soc/fsl/fsl_esai.c
+++ b/sound/soc/fsl/fsl_esai.c
@@ -314,6 +314,7 @@ static int fsl_esai_startup(struct snd_pcm_substream *substream,
 
         clk_enable(esai->clk);
         clk_prepare_enable(esai->dmaclk);
+        clk_prepare_enable(esai->extalclk);
 
         esai->substream[substream->stream] = substream;
 
@@ -474,6 +475,7 @@ static void fsl_esai_shutdown(struct snd_pcm_substream *substream,
 
         esai->substream[substream->stream] = NULL;
 
+        clk_disable_unprepare(esai->extalclk);
         clk_disable_unprepare(esai->dmaclk);
         clk_disable(esai->clk);
 }
@@ -774,6 +776,13 @@ static int fsl_esai_probe(struct platform_device *pdev)
                 goto failed_get_resource;
         }
 
+        esai->extalclk = devm_clk_get(&pdev->dev, "extal");
+        if (IS_ERR(esai->extalclk)) {
+                ret = PTR_ERR(esai->extalclk);
+                dev_err(&pdev->dev, "Cannot get extal clock: %d\n", ret);
+                goto failed_get_resource;
+        }
+
         ret = of_address_to_resource(np, 0, &res);
         if (ret) {
                 dev_err(&pdev->dev, "could not determine device resources\n");
diff --git a/sound/soc/fsl/fsl_esai.h b/sound/soc/fsl/fsl_esai.h
index daf080641277..b2551c530782 100644
--- a/sound/soc/fsl/fsl_esai.h
+++ b/sound/soc/fsl/fsl_esai.h
@@ -320,6 +320,7 @@
 struct fsl_esai {
         struct clk *clk;
         struct clk *dmaclk;
+        struct clk *extalclk;
         void __iomem *base;
         int irq;
         unsigned int flags;