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spi: atmel_spi: using ip version to check whether has wdrbt

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Using IP version to check whether it has wdrbt bit in mode register

Tested in at91sam9x5ek and at91sam9n12ek.

Signed-off-by: Bo Shen <voice.shen@atmel.com>
[fix warning about incompatible parameter]
Signed-off-by: Josh Wu <josh.wu@atmel.com>
Signed-off-by: Andreas Bießmann <andreas.devel@googlemail.com>
This commit is contained in:
Bo Shen 2013-04-16 23:42:42 +00:00 committed by Andreas Bießmann
parent cac423a730
commit e0d2d3bd29
2 changed files with 13 additions and 4 deletions
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15
drivers/spi/atmel_spi.c
View File

@ -30,6 +30,15 @@
#include "atmel_spi.h"
static int spi_has_wdrbt(struct atmel_spi_slave *slave)
{
unsigned int ver;
ver = spi_readl(slave, VERSION);
return (ATMEL_SPI_VERSION_REV(ver) >= 0x210);
}
void spi_init()
{
@ -90,10 +99,10 @@ struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
as->regs = regs;
as->mr = ATMEL_SPI_MR_MSTR | ATMEL_SPI_MR_MODFDIS
#if defined(CONFIG_AT91SAM9X5) || defined(CONFIG_AT91SAM9M10G45)
| ATMEL_SPI_MR_WDRBT
#endif
| ATMEL_SPI_MR_PCS(~(1 << cs) & 0xf);
if (spi_has_wdrbt(as))
as->mr |= ATMEL_SPI_MR_WDRBT;
spi_writel(as, CSR(cs), csrx);
return &as->slave;

2
drivers/spi/atmel_spi.h
View File

@ -64,7 +64,7 @@
#define ATMEL_SPI_CSRx_DLYBCT(x) ((x) << 24)
/* Bits in VERSION */
#define ATMEL_SPI_VERSION_REV(x) ((x) << 0)
#define ATMEL_SPI_VERSION_REV(x) ((x) & 0xfff)
#define ATMEL_SPI_VERSION_MFN(x) ((x) << 16)
/* Constants for CSRx:BITS */