[U-Boot] [PATCH 2/4] spi: atmel: add WDRBT bit to avoid receive overrun

[Andreas Bießmann]

Dear Bo Shen,

On 20.08.2012 08:32, Bo Shen wrote:
> The atmel at91sam9x5 series spi has feature to avoid receive overren
> 
> Using the patch to enable it
> 
> Signed-off-by: Bo Shen <voice.shen at atmel.com>

Acked-by: Andreas Bießmann <andreas.devel at googlemail.com>

Mike, will you take this patch?

Best regards

Andreas Bießmann
> ---
>  drivers/spi/atmel_spi.c |    3 +++
>  drivers/spi/atmel_spi.h |    1 +
>  2 files changed, 4 insertions(+)
> 
> diff --git a/drivers/spi/atmel_spi.c b/drivers/spi/atmel_spi.c
> index 83ef8e8..c7a51f7 100644
> --- a/drivers/spi/atmel_spi.c
> +++ b/drivers/spi/atmel_spi.c
> @@ -92,6 +92,9 @@ struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
>  	as->slave.cs = cs;
>  	as->regs = regs;
>  	as->mr = ATMEL_SPI_MR_MSTR | ATMEL_SPI_MR_MODFDIS
> +#if defined(CONFIG_AT91SAM9X5)
> +			| ATMEL_SPI_MR_WDRBT
> +#endif
>  			| ATMEL_SPI_MR_PCS(~(1 << cs) & 0xf);
>  	spi_writel(as, CSR(cs), csrx);
>  
> diff --git a/drivers/spi/atmel_spi.h b/drivers/spi/atmel_spi.h
> index 8b69a6d..057de9a 100644
> --- a/drivers/spi/atmel_spi.h
> +++ b/drivers/spi/atmel_spi.h
> @@ -26,6 +26,7 @@
>  #define ATMEL_SPI_MR_PCSDEC		(1 << 2)
>  #define ATMEL_SPI_MR_FDIV		(1 << 3)
>  #define ATMEL_SPI_MR_MODFDIS		(1 << 4)
> +#define ATMEL_SPI_MR_WDRBT		(1 << 5)
>  #define ATMEL_SPI_MR_LLB		(1 << 7)
>  #define ATMEL_SPI_MR_PCS(x)		(((x) & 15) << 16)
>  #define ATMEL_SPI_MR_DLYBCS(x)		((x) << 24)
>