Merge branches 'acpica-fixes', 'acpi-video' and 'acpi-processor'

[deliverable/linux.git] / sound / soc / fsl / fsl_spdif.c

diff --git a/sound/soc/fsl/fsl_spdif.c b/sound/soc/fsl/fsl_spdif.c
index 28a88233690474d83a49cb0de268803b2280e19d..151849f7986396b335863222e1a3e599557bcd62 100644 (file)
--- a/sound/soc/fsl/fsl_spdif.c
+++ b/sound/soc/fsl/fsl_spdif.c
@@ -88,6 +88,7 @@ struct spdif_mixer_control {
  * @rxclk: rx clock sources for capture
  * @coreclk: core clock for register access via DMA
  * @sysclk: system clock for rx clock rate measurement
+ * @spbaclk: SPBA clock (optional, depending on SoC design)
  * @dma_params_tx: DMA parameters for transmit channel
  * @dma_params_rx: DMA parameters for receive channel
  */
@@ -106,6 +107,7 @@ struct fsl_spdif_priv {
        struct clk *rxclk;
        struct clk *coreclk;
        struct clk *sysclk;
+       struct clk *spbaclk;
        struct snd_dmaengine_dai_dma_data dma_params_tx;
        struct snd_dmaengine_dai_dma_data dma_params_rx;
        /* regcache for SRPC */
@@ -474,6 +476,14 @@ static int fsl_spdif_startup(struct snd_pcm_substream *substream,
                        return ret;
                }
 
+               if (!IS_ERR(spdif_priv->spbaclk)) {
+                       ret = clk_prepare_enable(spdif_priv->spbaclk);
+                       if (ret) {
+                               dev_err(&pdev->dev, "failed to enable spba clock\n");
+                               goto err_spbaclk;
+                       }
+               }
+
                ret = spdif_softreset(spdif_priv);
                if (ret) {
                        dev_err(&pdev->dev, "failed to soft reset\n");
@@ -515,6 +525,9 @@ disable_txclk:
        for (i--; i >= 0; i--)
                clk_disable_unprepare(spdif_priv->txclk[i]);
 err:
+       if (!IS_ERR(spdif_priv->spbaclk))
+               clk_disable_unprepare(spdif_priv->spbaclk);
+err_spbaclk:
        clk_disable_unprepare(spdif_priv->coreclk);
 
        return ret;
@@ -548,6 +561,8 @@ static void fsl_spdif_shutdown(struct snd_pcm_substream *substream,
                spdif_intr_status_clear(spdif_priv);
                regmap_update_bits(regmap, REG_SPDIF_SCR,
                                SCR_LOW_POWER, SCR_LOW_POWER);
+               if (!IS_ERR(spdif_priv->spbaclk))
+                       clk_disable_unprepare(spdif_priv->spbaclk);
                clk_disable_unprepare(spdif_priv->coreclk);
        }
 }
@@ -1261,6 +1276,10 @@ static int fsl_spdif_probe(struct platform_device *pdev)
                return PTR_ERR(spdif_priv->coreclk);
        }
 
+       spdif_priv->spbaclk = devm_clk_get(&pdev->dev, "spba");
+       if (IS_ERR(spdif_priv->spbaclk))
+               dev_warn(&pdev->dev, "no spba clock in devicetree\n");
+
        /* Select clock source for rx/tx clock */
        spdif_priv->rxclk = devm_clk_get(&pdev->dev, "rxtx1");
        if (IS_ERR(spdif_priv->rxclk)) {