[PATCH V2 0/3] add spba clock for fsl audio IP

[PATCH V2 0/3] add spba clock for fsl audio IP

[Shengjiu Wang]

add spba clock for fsl audio IP

Changes in v2
- spba is a optional clock, compatible with previous devicetree.
- change the name from "dma" to "spba"

Shengjiu Wang (3):
  ASoC: fsl_esai: spba clock is needed by esai device
  ASoC: fsl_spdif: spba clk is needed by spdif device
  ASoC: fsl_asrc: spba clock is needed by asrc device

 Documentation/devicetree/bindings/sound/fsl,asrc.txt  |  2 ++
 Documentation/devicetree/bindings/sound/fsl,esai.txt  |  2 ++
 Documentation/devicetree/bindings/sound/fsl,spdif.txt |  2 ++
 sound/soc/fsl/fsl_asrc.c                              | 10 ++++++++++
 sound/soc/fsl/fsl_asrc.h                              |  1 +
 sound/soc/fsl/fsl_esai.c                              | 12 ++++++++++++
 sound/soc/fsl/fsl_spdif.c                             | 14 ++++++++++++++
 7 files changed, 43 insertions(+)

-- 
1.9.1

[PATCH V2 1/3] ASoC: fsl_esai: spba clock is needed by esai device

[Shengjiu Wang]

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>
---
 Documentation/devicetree/bindings/sound/fsl,esai.txt |  2 ++
 sound/soc/fsl/fsl_esai.c                             | 12 ++++++++++++
 2 files changed, 14 insertions(+)

diff --git a/Documentation/devicetree/bindings/sound/fsl,esai.txt b/Documentation/devicetree/bindings/sound/fsl,esai.txt
index d3b6b5f..f1d5351 100644
--- a/Documentation/devicetree/bindings/sound/fsl,esai.txt
+++ b/Documentation/devicetree/bindings/sound/fsl,esai.txt
@@ -27,6 +27,8 @@ Required properties:
 			  derive HCK, SCK and FS.
 	"fsys"		  The system clock derived from ahb clock used to
 			  derive HCK, SCK and FS.
+	"spba"		  The spba clock is needed when two spba master port
+			  is used.
 
   - fsl,fifo-depth	: The number of elements in the transmit and receive
 			  FIFOs. This number is the maximum allowed value for
diff --git a/sound/soc/fsl/fsl_esai.c b/sound/soc/fsl/fsl_esai.c
index 504e731..8749f53 100644
--- a/sound/soc/fsl/fsl_esai.c
+++ b/sound/soc/fsl/fsl_esai.c
@@ -54,6 +54,7 @@ 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 +470,9 @@ static int fsl_esai_startup(struct snd_pcm_substream *substream,
 	ret = clk_prepare_enable(esai_priv->coreclk);
 	if (ret)
 		return ret;
+	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 +503,8 @@ err_fsysclk:
 	if (!IS_ERR(esai_priv->extalclk))
 		clk_disable_unprepare(esai_priv->extalclk);
 err_extalck:
+	clk_disable_unprepare(esai_priv->spbaclk);
+err_spbaclk:
 	clk_disable_unprepare(esai_priv->coreclk);
 
 	return ret;
@@ -564,6 +570,7 @@ 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);
+	clk_disable_unprepare(esai_priv->spbaclk);
 	clk_disable_unprepare(esai_priv->coreclk);
 }
 
@@ -819,6 +826,11 @@ 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, "Cannot 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);
-- 
1.9.1

[PATCH V2 2/3] ASoC: fsl_spdif: spba clk is needed by spdif device

[Shengjiu Wang]

SPDIF 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 SPDIF registers.

Signed-off-by: Shengjiu Wang <shengjiu.wang@freescale.com>
---
 Documentation/devicetree/bindings/sound/fsl,spdif.txt |  2 ++
 sound/soc/fsl/fsl_spdif.c                             | 14 ++++++++++++++
 2 files changed, 16 insertions(+)

diff --git a/Documentation/devicetree/bindings/sound/fsl,spdif.txt b/Documentation/devicetree/bindings/sound/fsl,spdif.txt
index b5ee32e..7bcd9d0 100644
--- a/Documentation/devicetree/bindings/sound/fsl,spdif.txt
+++ b/Documentation/devicetree/bindings/sound/fsl,spdif.txt
@@ -27,6 +27,8 @@ 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 needed when two spba master port
+			  is used.
 
    - 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 28a8823..d4b0ba3 100644
--- a/sound/soc/fsl/fsl_spdif.c
+++ b/sound/soc/fsl/fsl_spdif.c
@@ -106,6 +106,7 @@ 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 +475,12 @@ static int fsl_spdif_startup(struct snd_pcm_substream *substream,
 			return ret;
 		}
 
+		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 +522,8 @@ disable_txclk:
 	for (i--; i >= 0; i--)
 		clk_disable_unprepare(spdif_priv->txclk[i]);
 err:
+	clk_disable_unprepare(spdif_priv->spbaclk);
+err_spbaclk:
 	clk_disable_unprepare(spdif_priv->coreclk);
 
 	return ret;
@@ -548,6 +557,7 @@ 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);
+		clk_disable_unprepare(spdif_priv->spbaclk);
 		clk_disable_unprepare(spdif_priv->coreclk);
 	}
 }
@@ -1261,6 +1271,10 @@ 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)) {
-- 
1.9.1

[PATCH V2 3/3] ASoC: fsl_asrc: spba clock is needed by asrc device

[Shengjiu Wang]

ASRC 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 ASRC registers

Signed-off-by: Shengjiu Wang <shengjiu.wang@freescale.com>
---
 Documentation/devicetree/bindings/sound/fsl,asrc.txt |  2 ++
 sound/soc/fsl/fsl_asrc.c                             | 10 ++++++++++
 sound/soc/fsl/fsl_asrc.h                             |  1 +
 3 files changed, 13 insertions(+)

diff --git a/Documentation/devicetree/bindings/sound/fsl,asrc.txt b/Documentation/devicetree/bindings/sound/fsl,asrc.txt
index b93362a..d8eeee3 100644
--- a/Documentation/devicetree/bindings/sound/fsl,asrc.txt
+++ b/Documentation/devicetree/bindings/sound/fsl,asrc.txt
@@ -25,6 +25,8 @@ Required properties:
 	"mem"		  Peripheral access clock to access registers.
 	"ipg"		  Peripheral clock to driver module.
 	"asrck_<0-f>"	  Clock sources for input and output clock.
+	"spba"		  The spba clock is needed when two spba master port
+			  is used.
 
    - big-endian		: If this property is absent, the little endian mode
 			  will be in use as default. Otherwise, the big endian
diff --git a/sound/soc/fsl/fsl_asrc.c b/sound/soc/fsl/fsl_asrc.c
index 9f087d4..800828e 100644
--- a/sound/soc/fsl/fsl_asrc.c
+++ b/sound/soc/fsl/fsl_asrc.c
@@ -859,6 +859,10 @@ static int fsl_asrc_probe(struct platform_device *pdev)
 		return PTR_ERR(asrc_priv->ipg_clk);
 	}
 
+	asrc_priv->spba_clk = devm_clk_get(&pdev->dev, "spba");
+	if (IS_ERR(asrc_priv->spba_clk))
+		dev_warn(&pdev->dev, "failed to get spba clock\n");
+
 	for (i = 0; i < ASRC_CLK_MAX_NUM; i++) {
 		sprintf(tmp, "asrck_%x", i);
 		asrc_priv->asrck_clk[i] = devm_clk_get(&pdev->dev, tmp);
@@ -939,6 +943,9 @@ static int fsl_asrc_runtime_resume(struct device *dev)
 	ret = clk_prepare_enable(asrc_priv->ipg_clk);
 	if (ret)
 		goto disable_mem_clk;
+	ret = clk_prepare_enable(asrc_priv->spba_clk);
+	if (ret)
+		goto disable_ipg_clk;
 	for (i = 0; i < ASRC_CLK_MAX_NUM; i++) {
 		ret = clk_prepare_enable(asrc_priv->asrck_clk[i]);
 		if (ret)
@@ -950,6 +957,8 @@ static int fsl_asrc_runtime_resume(struct device *dev)
 disable_asrck_clk:
 	for (i--; i >= 0; i--)
 		clk_disable_unprepare(asrc_priv->asrck_clk[i]);
+	clk_disable_unprepare(asrc_priv->spba_clk);
+disable_ipg_clk:
 	clk_disable_unprepare(asrc_priv->ipg_clk);
 disable_mem_clk:
 	clk_disable_unprepare(asrc_priv->mem_clk);
@@ -963,6 +972,7 @@ static int fsl_asrc_runtime_suspend(struct device *dev)
 
 	for (i = 0; i < ASRC_CLK_MAX_NUM; i++)
 		clk_disable_unprepare(asrc_priv->asrck_clk[i]);
+	clk_disable_unprepare(asrc_priv->spba_clk);
 	clk_disable_unprepare(asrc_priv->ipg_clk);
 	clk_disable_unprepare(asrc_priv->mem_clk);
 
diff --git a/sound/soc/fsl/fsl_asrc.h b/sound/soc/fsl/fsl_asrc.h
index 4aed63c..889080e 100644
--- a/sound/soc/fsl/fsl_asrc.h
+++ b/sound/soc/fsl/fsl_asrc.h
@@ -442,6 +442,7 @@ struct fsl_asrc {
 	unsigned long paddr;
 	struct clk *mem_clk;
 	struct clk *ipg_clk;
+	struct clk *spba_clk;
 	struct clk *asrck_clk[ASRC_CLK_MAX_NUM];
 	spinlock_t lock;
 
-- 
1.9.1

Re: [PATCH V2 1/3] ASoC: fsl_esai: spba clock is needed by esai device

[Nicolin Chen]

On Fri, Nov 20, 2015 at 02:17:51PM +0800, Shengjiu Wang wrote:

> diff --git a/Documentation/devicetree/bindings/sound/fsl,esai.txt b/Documentation/devicetree/bindings/sound/fsl,esai.txt
> index d3b6b5f..f1d5351 100644
> --- a/Documentation/devicetree/bindings/sound/fsl,esai.txt
> +++ b/Documentation/devicetree/bindings/sound/fsl,esai.txt
> @@ -27,6 +27,8 @@ Required properties:
>  			  derive HCK, SCK and FS.
>  	"fsys"		  The system clock derived from ahb clock used to
>  			  derive HCK, SCK and FS.
> +	"spba"		  The spba clock is needed when two spba master port
> +			  is used.

I was expecting a little bit more detail like:

+	"spba"		The spba clock is required when ESAI 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.

> diff --git a/sound/soc/fsl/fsl_esai.c b/sound/soc/fsl/fsl_esai.c
> index 504e731..8749f53 100644
> --- a/sound/soc/fsl/fsl_esai.c
> +++ b/sound/soc/fsl/fsl_esai.c
> @@ -54,6 +54,7 @@ struct fsl_esai {
>  	struct clk *coreclk;
>  	struct clk *extalclk;
>  	struct clk *fsysclk;
> +	struct clk *spbaclk;

Please add one entry in the comment above for the new clock.

> @@ -819,6 +826,11 @@ 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, "Cannot get spba clock: %ld\n",

It'd be better to write the warning following the previous one:
+  		dev_warn(&pdev->dev, "failed to get spba clock: %ld\n",

Re: [PATCH V2 3/3] ASoC: fsl_asrc: spba clock is needed by asrc device

[Rob Herring]

On Fri, Nov 20, 2015 at 02:17:53PM +0800, Shengjiu Wang wrote:
> ASRC 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 ASRC registers
> 
> Signed-off-by: Shengjiu Wang <shengjiu.wang@freescale.com>
> ---
>  Documentation/devicetree/bindings/sound/fsl,asrc.txt |  2 ++
>  sound/soc/fsl/fsl_asrc.c                             | 10 ++++++++++
>  sound/soc/fsl/fsl_asrc.h                             |  1 +
>  3 files changed, 13 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/sound/fsl,asrc.txt b/Documentation/devicetree/bindings/sound/fsl,asrc.txt
> index b93362a..d8eeee3 100644
> --- a/Documentation/devicetree/bindings/sound/fsl,asrc.txt
> +++ b/Documentation/devicetree/bindings/sound/fsl,asrc.txt
> @@ -25,6 +25,8 @@ Required properties:
>  	"mem"		  Peripheral access clock to access registers.
>  	"ipg"		  Peripheral clock to driver module.
>  	"asrck_<0-f>"	  Clock sources for input and output clock.
> +	"spba"		  The spba clock is needed when two spba master port
> +			  is used.

I'm assuming the same comments on patch 1 apply to all 3.

Rob

Re: [PATCH V2 3/3] ASoC: fsl_asrc: spba clock is needed by asrc device

[Nicolin Chen]

On Fri, Nov 20, 2015 at 08:29:46AM -0600, Rob Herring wrote:
> On Fri, Nov 20, 2015 at 02:17:53PM +0800, Shengjiu Wang wrote:
> > ASRC 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 ASRC registers
> > 
> > Signed-off-by: Shengjiu Wang <shengjiu.wang@freescale.com>
> > ---
> >  Documentation/devicetree/bindings/sound/fsl,asrc.txt |  2 ++
> >  sound/soc/fsl/fsl_asrc.c                             | 10 ++++++++++
> >  sound/soc/fsl/fsl_asrc.h                             |  1 +
> >  3 files changed, 13 insertions(+)
> > 
> > diff --git a/Documentation/devicetree/bindings/sound/fsl,asrc.txt b/Documentation/devicetree/bindings/sound/fsl,asrc.txt
> > index b93362a..d8eeee3 100644
> > --- a/Documentation/devicetree/bindings/sound/fsl,asrc.txt
> > +++ b/Documentation/devicetree/bindings/sound/fsl,asrc.txt
> > @@ -25,6 +25,8 @@ Required properties:
> >  	"mem"		  Peripheral access clock to access registers.
> >  	"ipg"		  Peripheral clock to driver module.
> >  	"asrck_<0-f>"	  Clock sources for input and output clock.
> > +	"spba"		  The spba clock is needed when two spba master port
> > +			  is used.
> 
> I'm assuming the same comments on patch 1 apply to all 3.

Yes. I should have mentioned that.

Nicolin