ASoC: fsl_esai: spba clock is needed by esai device

ESAI need to enable the spba clock, when sdma is using share peripheral
script. In this case, there is two spba master port is used, if don't
enable the clock, the spba bus will have arbitration issue, which may
cause read/write wrong data from/to ESAI registers.

Signed-off-by: Shengjiu Wang <shengjiu.wang@freescale.com>
Acked-by: Nicolin Chen <nicoleotsuka@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

1 files changed, 17 insertions, 0 deletions

diff --git a/sound/soc/fsl/fsl_esai.c b/sound/soc/fsl/fsl_esai.c
index 59f234e51971..6746f76a8c7f 100644
--- a/sound/soc/fsl/fsl_esai.c
+++ b/sound/soc/fsl/fsl_esai.c
@@ -35,6 +35,7 @@
  * @coreclk: clock source to access register
  * @extalclk: esai clock source to derive HCK, SCK and FS
  * @fsysclk: system clock source to derive HCK, SCK and FS
+ * @spbaclk: SPBA clock (optional, depending on SoC design)
  * @fifo_depth: depth of tx/rx FIFO
  * @slot_width: width of each DAI slot
  * @slots: number of slots
@@ -54,6 +55,7 @@ struct fsl_esai {
         struct clk *coreclk;
         struct clk *extalclk;
         struct clk *fsysclk;
+        struct clk *spbaclk;
         u32 fifo_depth;
         u32 slot_width;
         u32 slots;
@@ -469,6 +471,11 @@ static int fsl_esai_startup(struct snd_pcm_substream *substream,
         ret = clk_prepare_enable(esai_priv->coreclk);
         if (ret)
                 return ret;
+        if (!IS_ERR(esai_priv->spbaclk)) {
+                ret = clk_prepare_enable(esai_priv->spbaclk);
+                if (ret)
+                        goto err_spbaclk;
+        }
         if (!IS_ERR(esai_priv->extalclk)) {
                 ret = clk_prepare_enable(esai_priv->extalclk);
                 if (ret)
@@ -499,6 +506,9 @@ err_fsysclk:
         if (!IS_ERR(esai_priv->extalclk))
                 clk_disable_unprepare(esai_priv->extalclk);
 err_extalck:
+        if (!IS_ERR(esai_priv->spbaclk))
+                clk_disable_unprepare(esai_priv->spbaclk);
+err_spbaclk:
         clk_disable_unprepare(esai_priv->coreclk);
 
         return ret;
@@ -564,6 +574,8 @@ static void fsl_esai_shutdown(struct snd_pcm_substream *substream,
                 clk_disable_unprepare(esai_priv->fsysclk);
         if (!IS_ERR(esai_priv->extalclk))
                 clk_disable_unprepare(esai_priv->extalclk);
+        if (!IS_ERR(esai_priv->spbaclk))
+                clk_disable_unprepare(esai_priv->spbaclk);
         clk_disable_unprepare(esai_priv->coreclk);
 }
 
@@ -819,6 +831,11 @@ static int fsl_esai_probe(struct platform_device *pdev)
                 dev_warn(&pdev->dev, "failed to get fsys clock: %ld\n",
                                 PTR_ERR(esai_priv->fsysclk));
 
+        esai_priv->spbaclk = devm_clk_get(&pdev->dev, "spba");
+        if (IS_ERR(esai_priv->spbaclk))
+                dev_warn(&pdev->dev, "failed to get spba clock: %ld\n",
+                                PTR_ERR(esai_priv->spbaclk));
+
         irq = platform_get_irq(pdev, 0);
         if (irq < 0) {
                 dev_err(&pdev->dev, "no irq for node %s\n", pdev->name);