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| author | Murali Karicheri <m-karicheri2@ti.com> | 2015-06-10 03:23:42 -0400 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2015-06-10 18:28:04 +0100 |
| commit | e0b047bd8fc73b35ba1081097e0223eb778d982c (patch) | |
| tree | bba7b831a8ef4af5f6bfd7083b1e7907db426065 /drivers/spi | |
| parent | b787f68c36d49bb1d9236f403813641efa74a031 (diff) | |
| download | blackbird-op-linux-e0b047bd8fc73b35ba1081097e0223eb778d982c.tar.gz blackbird-op-linux-e0b047bd8fc73b35ba1081097e0223eb778d982c.zip | |
spi: davinci: change the lower limit of pre-scale divider to 1
SPI hardware spec for Keystone specify a lower value of 0 for pre-scale
divider which determine what max value of spi clock (spi-max-frequency)
the device can support. This translates to a clock divider of 2. So fix
the lower limit value used for the boundary check in
davinci_spi_get_prescale() function to 1 so that a maximum of spi device
clock rate / 2 is possible to be set for spi-max-frequency.
Signed-off-by: Murali Karicheri <m-karicheri2@ti.com>
Acked-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/spi')
| -rw-r--r-- | drivers/spi/spi-davinci.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/spi/spi-davinci.c b/drivers/spi/spi-davinci.c index 5e991065f5b0..987afebea093 100644 --- a/drivers/spi/spi-davinci.c +++ b/drivers/spi/spi-davinci.c @@ -265,7 +265,7 @@ static inline int davinci_spi_get_prescale(struct davinci_spi *dspi, ret = DIV_ROUND_UP(clk_get_rate(dspi->clk), max_speed_hz); - if (ret < 3 || ret > 256) + if (ret < 1 || ret > 256) return -EINVAL; return ret - 1; |
