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Merge remote-tracking branch 'spi/topic/wr' into spi-next

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This commit is contained in:
Mark Brown 2013-10-25 09:51:41 +01:00
commit 82f85cf98f
5 changed files with 31 additions and 12 deletions
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27
include/linux/spi/spi.h
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@ -853,6 +853,33 @@ static inline ssize_t spi_w8r16(struct spi_device *spi, u8 cmd)
return (status < 0) ? status : result;
}
/**
* spi_w8r16be - SPI synchronous 8 bit write followed by 16 bit big-endian read
* @spi: device with which data will be exchanged
* @cmd: command to be written before data is read back
* Context: can sleep
*
* This returns the (unsigned) sixteen bit number returned by the device in cpu
* endianness, or else a negative error code. Callable only from contexts that
* can sleep.
*
* This function is similar to spi_w8r16, with the exception that it will
* convert the read 16 bit data word from big-endian to native endianness.
*
*/
static inline ssize_t spi_w8r16be(struct spi_device *spi, u8 cmd)
{
ssize_t status;
__be16 result;
status = spi_write_then_read(spi, &cmd, 1, &result, 2);
if (status < 0)
return status;
return be16_to_cpu(result);
}
/*---------------------------------------------------------------------------*/
/*