diff options
| author | Qipan Li <Qipan.Li@csr.com> | 2014-11-17 23:17:02 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-12-06 15:57:30 -0800 |
| commit | b1b944c5a4eb308f58ff6ba6630b2d58dd4511d3 (patch) | |
| tree | 05f2c8be6d93ac8257f93fd48b6fc7afdf971249 | |
| parent | 2f5dbae2894829b607ac5c0558e3ae0b34f8a8c7 (diff) | |
spi: sirf: fix word width configuration
commit 9c4b19a07dddda3ba35a2eb9b4134d485908e2f5 upstream.
commit 8c328a262f ("spi: sirf: Avoid duplicate code in various
bits_per_word cases") is wrong in setting data width register of
fifo is not right, it should use sspi->word_width >> 1 to set
related bits. According to hardware spec, the mapping between
register value and data width:
0 - byte
1 - WORD
2 - DWORD
Fixes: 8c328a262f ("spi: sirf: Avoid duplicate code in various bits_per_word cases") is wrong in setting data width register of
Signed-off-by: Qipan Li <Qipan.Li@csr.com>
Signed-off-by: Barry Song <Baohua.Song@csr.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/spi/spi-sirf.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/spi/spi-sirf.c b/drivers/spi/spi-sirf.c index 6f0602fd7401..ca67bcf9475a 100644 --- a/drivers/spi/spi-sirf.c +++ b/drivers/spi/spi-sirf.c @@ -565,9 +565,9 @@ spi_sirfsoc_setup_transfer(struct spi_device *spi, struct spi_transfer *t) sspi->word_width = DIV_ROUND_UP(bits_per_word, 8); txfifo_ctrl = SIRFSOC_SPI_FIFO_THD(SIRFSOC_SPI_FIFO_SIZE / 2) | - sspi->word_width; + (sspi->word_width >> 1); rxfifo_ctrl = SIRFSOC_SPI_FIFO_THD(SIRFSOC_SPI_FIFO_SIZE / 2) | - sspi->word_width; + (sspi->word_width >> 1); if (!(spi->mode & SPI_CS_HIGH)) regval |= SIRFSOC_SPI_CS_IDLE_STAT; |