[PATCH 1/4] spi: mediatek: update document devicetree bindings to fix syntax error

[PATCH 1/4] spi: mediatek: update document devicetree bindings to fix syntax error

[Leilk Liu]

This patch updates document devicetree bindings
to fix syntax error.

Signed-off-by: Leilk Liu <leilk.liu@mediatek.com>
---
 .../devicetree/bindings/spi/spi-mt65xx.txt         |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/spi/spi-mt65xx.txt b/Documentation/devicetree/bindings/spi/spi-mt65xx.txt
index ce363c923f..fba8334 100644
--- a/Documentation/devicetree/bindings/spi/spi-mt65xx.txt
+++ b/Documentation/devicetree/bindings/spi/spi-mt65xx.txt
@@ -32,7 +32,7 @@ Optional properties:
 -cs-gpios: see spi-bus.txt, only required for MT8173.
 
 - mediatek,pad-select: specify which pins group(ck/mi/mo/cs) spi
-  controller used. This is a array, the element value should be 0~3,
+  controller used. This is an array, the element value should be 0~3,
   only required for MT8173.
     0: specify GPIO69,70,71,72 for spi pins.
     1: specify GPIO102,103,104,105 for spi pins.
-- 
1.7.9.5

[PATCH 2/4] spi: mediatek: remove unrequired description

[Leilk Liu]

cs-gpios isn't required with patch "spi: mediatek: single
device does not require cs_gpios", so modify the description.

Signed-off-by: Leilk Liu <leilk.liu@mediatek.com>
---
 .../devicetree/bindings/spi/spi-mt65xx.txt         |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/spi/spi-mt65xx.txt b/Documentation/devicetree/bindings/spi/spi-mt65xx.txt
index fba8334..60a183c 100644
--- a/Documentation/devicetree/bindings/spi/spi-mt65xx.txt
+++ b/Documentation/devicetree/bindings/spi/spi-mt65xx.txt
@@ -29,7 +29,7 @@ Required properties:
   muxes clock, and "spi-clk" for the clock gate.
 
 Optional properties:
--cs-gpios: see spi-bus.txt, only required for MT8173.
+-cs-gpios: see spi-bus.txt.
 
 - mediatek,pad-select: specify which pins group(ck/mi/mo/cs) spi
   controller used. This is an array, the element value should be 0~3,
-- 
1.7.9.5

[PATCH 3/4] spi: mediatek: remove needless pair of writel()/readl()

[Leilk Liu]

It's not need to re-read and re-write SPI_CMD_REG, so remove it.

Signed-off-by: Leilk Liu <leilk.liu@mediatek.com>
---
 drivers/spi/spi-mt65xx.c |    3 ---
 1 file changed, 3 deletions(-)

diff --git a/drivers/spi/spi-mt65xx.c b/drivers/spi/spi-mt65xx.c
index 7840067..6c1a96e 100644
--- a/drivers/spi/spi-mt65xx.c
+++ b/drivers/spi/spi-mt65xx.c
@@ -154,9 +154,6 @@ static int mtk_spi_prepare_message(struct spi_master *master,
 		reg_val |= SPI_CMD_CPOL;
 	else
 		reg_val &= ~SPI_CMD_CPOL;
-	writel(reg_val, mdata->base + SPI_CMD_REG);
-
-	reg_val = readl(mdata->base + SPI_CMD_REG);
 
 	/* set the mlsbx and mlsbtx */
 	if (chip_config->tx_mlsb)
-- 
1.7.9.5

[PATCH 4/4] spi: mediatek: revise mtk_spi_probe() failure flow

[Leilk Liu]

This patch revises failure flow while pm_runtime_enable().

Signed-off-by: Leilk Liu <leilk.liu@mediatek.com>
---
 drivers/spi/spi-mt65xx.c |   15 ++++++++-------
 1 file changed, 8 insertions(+), 7 deletions(-)

diff --git a/drivers/spi/spi-mt65xx.c b/drivers/spi/spi-mt65xx.c
index 6c1a96e..00a36da 100644
--- a/drivers/spi/spi-mt65xx.c
+++ b/drivers/spi/spi-mt65xx.c
@@ -607,7 +607,8 @@ static int mtk_spi_probe(struct platform_device *pdev)
 	ret = clk_set_parent(mdata->sel_clk, mdata->parent_clk);
 	if (ret < 0) {
 		dev_err(&pdev->dev, "failed to clk_set_parent (%d)\n", ret);
-		goto err_disable_clk;
+		clk_disable_unprepare(mdata->spi_clk);
+		goto err_put_master;
 	}
 
 	clk_disable_unprepare(mdata->spi_clk);
@@ -617,7 +618,7 @@ static int mtk_spi_probe(struct platform_device *pdev)
 	ret = devm_spi_register_master(&pdev->dev, master);
 	if (ret) {
 		dev_err(&pdev->dev, "failed to register master (%d)\n", ret);
-		goto err_put_master;
+		goto err_disable_runtime_pm;
 	}
 
 	if (mdata->dev_comp->need_pad_sel) {
@@ -626,14 +627,14 @@ static int mtk_spi_probe(struct platform_device *pdev)
 				"pad_num does not match num_chipselect(%d != %d)\n",
 				mdata->pad_num, master->num_chipselect);
 			ret = -EINVAL;
-			goto err_put_master;
+			goto err_disable_runtime_pm;
 		}
 
 		if (!master->cs_gpios && master->num_chipselect > 1) {
 			dev_err(&pdev->dev,
 				"cs_gpios not specified and num_chipselect > 1\n");
 			ret = -EINVAL;
-			goto err_put_master;
+			goto err_disable_runtime_pm;
 		}
 
 		if (master->cs_gpios) {
@@ -644,7 +645,7 @@ static int mtk_spi_probe(struct platform_device *pdev)
 				if (ret) {
 					dev_err(&pdev->dev,
 						"can't get CS GPIO %i\n", i);
-					goto err_put_master;
+					goto err_disable_runtime_pm;
 				}
 			}
 		}
@@ -652,8 +653,8 @@ static int mtk_spi_probe(struct platform_device *pdev)
 
 	return 0;
 
-err_disable_clk:
-	clk_disable_unprepare(mdata->spi_clk);
+err_disable_runtime_pm:
+	pm_runtime_disable(&pdev->dev);
 err_put_master:
 	spi_master_put(master);
 
-- 
1.7.9.5

Re: [PATCH 1/4] spi: mediatek: update document devicetree bindings to fix syntax error

[Rob Herring]

On Fri, Nov 20, 2015 at 10:21:16AM +0800, Leilk Liu wrote:
> This patch updates document devicetree bindings
> to fix syntax error.
> 
> Signed-off-by: Leilk Liu <leilk.liu@mediatek.com>

Acked-by: Rob Herring <robh@kernel.org>

> ---
>  .../devicetree/bindings/spi/spi-mt65xx.txt         |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/Documentation/devicetree/bindings/spi/spi-mt65xx.txt b/Documentation/devicetree/bindings/spi/spi-mt65xx.txt
> index ce363c923f..fba8334 100644
> --- a/Documentation/devicetree/bindings/spi/spi-mt65xx.txt
> +++ b/Documentation/devicetree/bindings/spi/spi-mt65xx.txt
> @@ -32,7 +32,7 @@ Optional properties:
>  -cs-gpios: see spi-bus.txt, only required for MT8173.
>  
>  - mediatek,pad-select: specify which pins group(ck/mi/mo/cs) spi
> -  controller used. This is a array, the element value should be 0~3,
> +  controller used. This is an array, the element value should be 0~3,
>    only required for MT8173.
>      0: specify GPIO69,70,71,72 for spi pins.
>      1: specify GPIO102,103,104,105 for spi pins.
> -- 
> 1.7.9.5
> 
> --
> To unsubscribe from this list: send the line "unsubscribe devicetree" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html

Re: [PATCH 2/4] spi: mediatek: remove unrequired description

[Rob Herring]

On Fri, Nov 20, 2015 at 10:21:17AM +0800, Leilk Liu wrote:
> cs-gpios isn't required with patch "spi: mediatek: single
> device does not require cs_gpios", so modify the description.
> 
> Signed-off-by: Leilk Liu <leilk.liu@mediatek.com>

This could use a better subject. Try to make subjects specific enough 
they would only ever apply to the change.

Acked-by: Rob Herring <robh@kernel.org>

> ---
>  .../devicetree/bindings/spi/spi-mt65xx.txt         |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/Documentation/devicetree/bindings/spi/spi-mt65xx.txt b/Documentation/devicetree/bindings/spi/spi-mt65xx.txt
> index fba8334..60a183c 100644
> --- a/Documentation/devicetree/bindings/spi/spi-mt65xx.txt
> +++ b/Documentation/devicetree/bindings/spi/spi-mt65xx.txt
> @@ -29,7 +29,7 @@ Required properties:
>    muxes clock, and "spi-clk" for the clock gate.
>  
>  Optional properties:
> --cs-gpios: see spi-bus.txt, only required for MT8173.
> +-cs-gpios: see spi-bus.txt.
>  
>  - mediatek,pad-select: specify which pins group(ck/mi/mo/cs) spi
>    controller used. This is an array, the element value should be 0~3,
> -- 
> 1.7.9.5
> 
> --
> To unsubscribe from this list: send the line "unsubscribe devicetree" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html

Re: [PATCH 3/4] spi: mediatek: remove needless pair of writel()/readl()

[Matthias Brugger]

On 20/11/15 03:21, Leilk Liu wrote:
> It's not need to re-read and re-write SPI_CMD_REG, so remove it.
>
> Signed-off-by: Leilk Liu <leilk.liu@mediatek.com>
> ---
>   drivers/spi/spi-mt65xx.c |    3 ---
>   1 file changed, 3 deletions(-)
>
> diff --git a/drivers/spi/spi-mt65xx.c b/drivers/spi/spi-mt65xx.c
> index 7840067..6c1a96e 100644
> --- a/drivers/spi/spi-mt65xx.c
> +++ b/drivers/spi/spi-mt65xx.c
> @@ -154,9 +154,6 @@ static int mtk_spi_prepare_message(struct spi_master *master,
>   		reg_val |= SPI_CMD_CPOL;
>   	else
>   		reg_val &= ~SPI_CMD_CPOL;
> -	writel(reg_val, mdata->base + SPI_CMD_REG);
> -
> -	reg_val = readl(mdata->base + SPI_CMD_REG);
>
>   	/* set the mlsbx and mlsbtx */
>   	if (chip_config->tx_mlsb)
>

Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>

Re: [PATCH 4/4] spi: mediatek: revise mtk_spi_probe() failure flow

[Mark Brown]

[-- Attachment #1: Type: text/plain, Size: 2404 bytes --]

On Fri, Nov 20, 2015 at 10:21:19AM +0800, Leilk Liu wrote:
> This patch revises failure flow while pm_runtime_enable().

Why?  This also doesn't apply against current code, please check and
resend.

> 
> Signed-off-by: Leilk Liu <leilk.liu@mediatek.com>
> ---
>  drivers/spi/spi-mt65xx.c |   15 ++++++++-------
>  1 file changed, 8 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/spi/spi-mt65xx.c b/drivers/spi/spi-mt65xx.c
> index 6c1a96e..00a36da 100644
> --- a/drivers/spi/spi-mt65xx.c
> +++ b/drivers/spi/spi-mt65xx.c
> @@ -607,7 +607,8 @@ static int mtk_spi_probe(struct platform_device *pdev)
>  	ret = clk_set_parent(mdata->sel_clk, mdata->parent_clk);
>  	if (ret < 0) {
>  		dev_err(&pdev->dev, "failed to clk_set_parent (%d)\n", ret);
> -		goto err_disable_clk;
> +		clk_disable_unprepare(mdata->spi_clk);
> +		goto err_put_master;
>  	}
>  
>  	clk_disable_unprepare(mdata->spi_clk);
> @@ -617,7 +618,7 @@ static int mtk_spi_probe(struct platform_device *pdev)
>  	ret = devm_spi_register_master(&pdev->dev, master);
>  	if (ret) {
>  		dev_err(&pdev->dev, "failed to register master (%d)\n", ret);
> -		goto err_put_master;
> +		goto err_disable_runtime_pm;
>  	}
>  
>  	if (mdata->dev_comp->need_pad_sel) {
> @@ -626,14 +627,14 @@ static int mtk_spi_probe(struct platform_device *pdev)
>  				"pad_num does not match num_chipselect(%d != %d)\n",
>  				mdata->pad_num, master->num_chipselect);
>  			ret = -EINVAL;
> -			goto err_put_master;
> +			goto err_disable_runtime_pm;
>  		}
>  
>  		if (!master->cs_gpios && master->num_chipselect > 1) {
>  			dev_err(&pdev->dev,
>  				"cs_gpios not specified and num_chipselect > 1\n");
>  			ret = -EINVAL;
> -			goto err_put_master;
> +			goto err_disable_runtime_pm;
>  		}
>  
>  		if (master->cs_gpios) {
> @@ -644,7 +645,7 @@ static int mtk_spi_probe(struct platform_device *pdev)
>  				if (ret) {
>  					dev_err(&pdev->dev,
>  						"can't get CS GPIO %i\n", i);
> -					goto err_put_master;
> +					goto err_disable_runtime_pm;
>  				}
>  			}
>  		}
> @@ -652,8 +653,8 @@ static int mtk_spi_probe(struct platform_device *pdev)
>  
>  	return 0;
>  
> -err_disable_clk:
> -	clk_disable_unprepare(mdata->spi_clk);
> +err_disable_runtime_pm:
> +	pm_runtime_disable(&pdev->dev);
>  err_put_master:
>  	spi_master_put(master);
>  
> -- 
> 1.7.9.5
> 
> 

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Re: [PATCH 4/4] spi: mediatek: revise mtk_spi_probe() failure flow

[lei liu]

On Sat, 2015-11-21 at 13:39 +0000, Mark Brown wrote:
> On Fri, Nov 20, 2015 at 10:21:19AM +0800, Leilk Liu wrote:
> > This patch revises failure flow while pm_runtime_enable().
> 
> Why?  This also doesn't apply against current code, please check and
> resend.

I don't know. I can git am this patch to spi/for-next. I will resend it,
please help to apply it again, thanks.

> > 
> > Signed-off-by: Leilk Liu <leilk.liu@mediatek.com>
> > ---
> >  drivers/spi/spi-mt65xx.c |   15 ++++++++-------
> >  1 file changed, 8 insertions(+), 7 deletions(-)
> > 
> > diff --git a/drivers/spi/spi-mt65xx.c b/drivers/spi/spi-mt65xx.c
> > index 6c1a96e..00a36da 100644
> > --- a/drivers/spi/spi-mt65xx.c
> > +++ b/drivers/spi/spi-mt65xx.c
> > @@ -607,7 +607,8 @@ static int mtk_spi_probe(struct platform_device *pdev)
> >  	ret = clk_set_parent(mdata->sel_clk, mdata->parent_clk);
> >  	if (ret < 0) {
> >  		dev_err(&pdev->dev, "failed to clk_set_parent (%d)\n", ret);
> > -		goto err_disable_clk;
> > +		clk_disable_unprepare(mdata->spi_clk);
> > +		goto err_put_master;
> >  	}
> >  
> >  	clk_disable_unprepare(mdata->spi_clk);
> > @@ -617,7 +618,7 @@ static int mtk_spi_probe(struct platform_device *pdev)
> >  	ret = devm_spi_register_master(&pdev->dev, master);
> >  	if (ret) {
> >  		dev_err(&pdev->dev, "failed to register master (%d)\n", ret);
> > -		goto err_put_master;
> > +		goto err_disable_runtime_pm;
> >  	}
> >  
> >  	if (mdata->dev_comp->need_pad_sel) {
> > @@ -626,14 +627,14 @@ static int mtk_spi_probe(struct platform_device *pdev)
> >  				"pad_num does not match num_chipselect(%d != %d)\n",
> >  				mdata->pad_num, master->num_chipselect);
> >  			ret = -EINVAL;
> > -			goto err_put_master;
> > +			goto err_disable_runtime_pm;
> >  		}
> >  
> >  		if (!master->cs_gpios && master->num_chipselect > 1) {
> >  			dev_err(&pdev->dev,
> >  				"cs_gpios not specified and num_chipselect > 1\n");
> >  			ret = -EINVAL;
> > -			goto err_put_master;
> > +			goto err_disable_runtime_pm;
> >  		}
> >  
> >  		if (master->cs_gpios) {
> > @@ -644,7 +645,7 @@ static int mtk_spi_probe(struct platform_device *pdev)
> >  				if (ret) {
> >  					dev_err(&pdev->dev,
> >  						"can't get CS GPIO %i\n", i);
> > -					goto err_put_master;
> > +					goto err_disable_runtime_pm;
> >  				}
> >  			}
> >  		}
> > @@ -652,8 +653,8 @@ static int mtk_spi_probe(struct platform_device *pdev)
> >  
> >  	return 0;
> >  
> > -err_disable_clk:
> > -	clk_disable_unprepare(mdata->spi_clk);
> > +err_disable_runtime_pm:
> > +	pm_runtime_disable(&pdev->dev);
> >  err_put_master:
> >  	spi_master_put(master);
> >  
> > -- 
> > 1.7.9.5
> > 
> > 

Re: [PATCH 4/4] spi: mediatek: revise mtk_spi_probe() failure flow

[Mark Brown]

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On Tue, Nov 24, 2015 at 10:33:24AM +0800, lei liu wrote:
> On Sat, 2015-11-21 at 13:39 +0000, Mark Brown wrote:
> > On Fri, Nov 20, 2015 at 10:21:19AM +0800, Leilk Liu wrote:

> > > This patch revises failure flow while pm_runtime_enable().

> > Why?  This also doesn't apply against current code, please check and
> > resend.

> I don't know. I can git am this patch to spi/for-next. I will resend it,
> please help to apply it again, thanks.

If you don't know why we should make this change then we may as well
just not make it?

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Re: [PATCH 4/4] spi: mediatek: revise mtk_spi_probe() failure flow

[lei liu]

On Tue, 2015-11-24 at 13:04 +0000, Mark Brown wrote:
> On Tue, Nov 24, 2015 at 10:33:24AM +0800, lei liu wrote:
> > On Sat, 2015-11-21 at 13:39 +0000, Mark Brown wrote:
> > > On Fri, Nov 20, 2015 at 10:21:19AM +0800, Leilk Liu wrote:
> 
> > > > This patch revises failure flow while pm_runtime_enable().
> 
> > > Why?  This also doesn't apply against current code, please check and
> > > resend.
> 
> > I don't know. I can git am this patch to spi/for-next. I will resend it,
> > please help to apply it again, thanks.
> 
> If you don't know why we should make this change then we may as well
> just not make it?

OK. I will write a proper commit message to explain what this patch
does. Thanks.

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