[v2,3/4] spi: s3c64xx: add dma maxburst size initialization
diff mbox

Message ID 001b01ce10d3$e9f78620$bde69260$%kim@samsung.com
State New, archived
Headers show

Commit Message

boojin.kim Feb. 22, 2013, 8:09 a.m. UTC
This patch adds dma maxburst size initialization.
The maxburst should be set by MODE_CFGn.DMA_TYPE,
because the pl330 dma driver supports burst mode.

Signed-off-by: Hyeonkook Kim <hk619.kim@samsung.com>
---
 drivers/spi/spi-s3c64xx.c |   18 ++++++++++++++++++
 1 files changed, 18 insertions(+), 0 deletions(-)

--
1.7.5.4



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Comments

Grant Likely March 2, 2013, 10:23 p.m. UTC | #1
On Fri, 22 Feb 2013 17:09:18 +0900, Boojin Kim <boojin.kim@samsung.com> wrote:
> This patch adds dma maxburst size initialization.
> The maxburst should be set by MODE_CFGn.DMA_TYPE,
> because the pl330 dma driver supports burst mode.
> 
> Signed-off-by: Hyeonkook Kim <hk619.kim@samsung.com>

Applied, thanks.

g.

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Grant Likely March 2, 2013, 10:26 p.m. UTC | #2
On Fri, 22 Feb 2013 17:09:18 +0900, Boojin Kim <boojin.kim@samsung.com> wrote:
> This patch adds dma maxburst size initialization.
> The maxburst should be set by MODE_CFGn.DMA_TYPE,
> because the pl330 dma driver supports burst mode.
> 
> Signed-off-by: Hyeonkook Kim <hk619.kim@samsung.com>

Hello Hyeonkook,

I applied this patch but then discovered that it relys on the previous
patches that you've posted. When patched depend on each other like this
please post them as a series with [PATCH x/4] in the subject line.
'git send-email' will format this correctly for you.

g.

> ---
>  drivers/spi/spi-s3c64xx.c |   18 ++++++++++++++++++
>  1 files changed, 18 insertions(+), 0 deletions(-)
> 
> diff --git a/drivers/spi/spi-s3c64xx.c b/drivers/spi/spi-s3c64xx.c
> index e862ab8..5e6cafe 100644
> --- a/drivers/spi/spi-s3c64xx.c
> +++ b/drivers/spi/spi-s3c64xx.c
> @@ -287,10 +287,20 @@ static void prepare_dma(struct s3c64xx_spi_dma_data *dma,
>  	struct s3c64xx_spi_driver_data *sdd;
>  	struct samsung_dma_prep info;
>  	struct samsung_dma_config config;
> +	void __iomem *regs;
> +	unsigned int mode_cfg;
> 
>  	if (dma->direction == DMA_DEV_TO_MEM) {
>  		sdd = container_of((void *)dma,
>  			struct s3c64xx_spi_driver_data, rx_dma);
> +
> +		regs = sdd->regs;
> +		mode_cfg = readl(regs + S3C64XX_SPI_MODE_CFG);
> +		if (mode_cfg & S3C64XX_SPI_MODE_4BURST)
> +			config.maxburst = 4;
> +		else
> +			config.maxburst = 1;
> +
>  		config.direction = sdd->rx_dma.direction;
>  		config.fifo = sdd->sfr_start + S3C64XX_SPI_RX_DATA;
>  		config.width = sdd->cur_bpw / 8;
> @@ -298,6 +308,14 @@ static void prepare_dma(struct s3c64xx_spi_dma_data *dma,
>  	} else {
>  		sdd = container_of((void *)dma,
>  			struct s3c64xx_spi_driver_data, tx_dma);
> +
> +		regs = sdd->regs;
> +		mode_cfg = readl(regs + S3C64XX_SPI_MODE_CFG);
> +		if (mode_cfg & S3C64XX_SPI_MODE_4BURST)
> +			config.maxburst = 4;
> +		else
> +			config.maxburst = 1;
> +
>  		config.direction =  sdd->tx_dma.direction;
>  		config.fifo = sdd->sfr_start + S3C64XX_SPI_TX_DATA;
>  		config.width = sdd->cur_bpw / 8;
> --
> 1.7.5.4
> 
> 
> 
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Grant Likely March 2, 2013, 10:27 p.m. UTC | #3
On Fri, 22 Feb 2013 17:09:18 +0900, Boojin Kim <boojin.kim@samsung.com> wrote:
> This patch adds dma maxburst size initialization.
> The maxburst should be set by MODE_CFGn.DMA_TYPE,
> because the pl330 dma driver supports burst mode.
> 
> Signed-off-by: Hyeonkook Kim <hk619.kim@samsung.com>

Acked-by: Grant Likely <grant.likely@secretlab.ca>

This series probably needs to be merged together through the arm-soc
tree.

g.

> ---
>  drivers/spi/spi-s3c64xx.c |   18 ++++++++++++++++++
>  1 files changed, 18 insertions(+), 0 deletions(-)
> 
> diff --git a/drivers/spi/spi-s3c64xx.c b/drivers/spi/spi-s3c64xx.c
> index e862ab8..5e6cafe 100644
> --- a/drivers/spi/spi-s3c64xx.c
> +++ b/drivers/spi/spi-s3c64xx.c
> @@ -287,10 +287,20 @@ static void prepare_dma(struct s3c64xx_spi_dma_data *dma,
>  	struct s3c64xx_spi_driver_data *sdd;
>  	struct samsung_dma_prep info;
>  	struct samsung_dma_config config;
> +	void __iomem *regs;
> +	unsigned int mode_cfg;
> 
>  	if (dma->direction == DMA_DEV_TO_MEM) {
>  		sdd = container_of((void *)dma,
>  			struct s3c64xx_spi_driver_data, rx_dma);
> +
> +		regs = sdd->regs;
> +		mode_cfg = readl(regs + S3C64XX_SPI_MODE_CFG);
> +		if (mode_cfg & S3C64XX_SPI_MODE_4BURST)
> +			config.maxburst = 4;
> +		else
> +			config.maxburst = 1;
> +
>  		config.direction = sdd->rx_dma.direction;
>  		config.fifo = sdd->sfr_start + S3C64XX_SPI_RX_DATA;
>  		config.width = sdd->cur_bpw / 8;
> @@ -298,6 +308,14 @@ static void prepare_dma(struct s3c64xx_spi_dma_data *dma,
>  	} else {
>  		sdd = container_of((void *)dma,
>  			struct s3c64xx_spi_driver_data, tx_dma);
> +
> +		regs = sdd->regs;
> +		mode_cfg = readl(regs + S3C64XX_SPI_MODE_CFG);
> +		if (mode_cfg & S3C64XX_SPI_MODE_4BURST)
> +			config.maxburst = 4;
> +		else
> +			config.maxburst = 1;
> +
>  		config.direction =  sdd->tx_dma.direction;
>  		config.fifo = sdd->sfr_start + S3C64XX_SPI_TX_DATA;
>  		config.width = sdd->cur_bpw / 8;
> --
> 1.7.5.4
> 
> 
> 
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Patch
diff mbox

diff --git a/drivers/spi/spi-s3c64xx.c b/drivers/spi/spi-s3c64xx.c
index e862ab8..5e6cafe 100644
--- a/drivers/spi/spi-s3c64xx.c
+++ b/drivers/spi/spi-s3c64xx.c
@@ -287,10 +287,20 @@  static void prepare_dma(struct s3c64xx_spi_dma_data *dma,
 	struct s3c64xx_spi_driver_data *sdd;
 	struct samsung_dma_prep info;
 	struct samsung_dma_config config;
+	void __iomem *regs;
+	unsigned int mode_cfg;

 	if (dma->direction == DMA_DEV_TO_MEM) {
 		sdd = container_of((void *)dma,
 			struct s3c64xx_spi_driver_data, rx_dma);
+
+		regs = sdd->regs;
+		mode_cfg = readl(regs + S3C64XX_SPI_MODE_CFG);
+		if (mode_cfg & S3C64XX_SPI_MODE_4BURST)
+			config.maxburst = 4;
+		else
+			config.maxburst = 1;
+
 		config.direction = sdd->rx_dma.direction;
 		config.fifo = sdd->sfr_start + S3C64XX_SPI_RX_DATA;
 		config.width = sdd->cur_bpw / 8;
@@ -298,6 +308,14 @@  static void prepare_dma(struct s3c64xx_spi_dma_data *dma,
 	} else {
 		sdd = container_of((void *)dma,
 			struct s3c64xx_spi_driver_data, tx_dma);
+
+		regs = sdd->regs;
+		mode_cfg = readl(regs + S3C64XX_SPI_MODE_CFG);
+		if (mode_cfg & S3C64XX_SPI_MODE_4BURST)
+			config.maxburst = 4;
+		else
+			config.maxburst = 1;
+
 		config.direction =  sdd->tx_dma.direction;
 		config.fifo = sdd->sfr_start + S3C64XX_SPI_TX_DATA;
 		config.width = sdd->cur_bpw / 8;