The atmel at91sam9x5 series spi has feature to avoid receive overren
Using the patch to enable it
Signed-off-by: Bo Shen <voice.s...@atmel.com>
---
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)
--
1.7.9.5
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