diff options
| -rw-r--r-- | Documentation/devicetree/bindings/sound/fsl,spdif.txt | 5 | ||||
| -rw-r--r-- | sound/soc/fsl/fsl_spdif.c | 19 |
2 files changed, 24 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/sound/fsl,spdif.txt b/Documentation/devicetree/bindings/sound/fsl,spdif.txt index b5ee32ee3706..4ca39ddc0417 100644 --- a/Documentation/devicetree/bindings/sound/fsl,spdif.txt +++ b/Documentation/devicetree/bindings/sound/fsl,spdif.txt @@ -27,6 +27,11 @@ Required properties: Transceiver Clock Diagram" of SoC reference manual. It can also be referred to TxClk_Source bit of register SPDIF_STC. + "spba" The spba clock is required when SPDIF is placed as a + bus slave of the Shared Peripheral Bus and when two + or more bus masters (CPU, DMA or DSP) try to access + it. This property is optional depending on the SoC + design. - big-endian : If this property is absent, the native endian mode will be in use as default, or the big endian mode diff --git a/sound/soc/fsl/fsl_spdif.c b/sound/soc/fsl/fsl_spdif.c index 3d59bb6719f2..fa36e6753799 100644 --- 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)) { |