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| author | Matthias Seidel | 2016-09-07 17:45:30 +0200 |
|---|---|---|
| committer | Mark Brown | 2016-09-12 20:59:08 +0200 |
| commit | 3aef463222eaf1ca505629e93a0b64e4040a4472 (patch) | |
| tree | c133a67256a92cd432ad53fd60387220c4a828ca /drivers/spi/spi-dw.c | |
| parent | spi: dw: fix multiple slaves with different baudrates (diff) | |
| download | kernel-qcow2-linux-3aef463222eaf1ca505629e93a0b64e4040a4472.tar.gz kernel-qcow2-linux-3aef463222eaf1ca505629e93a0b64e4040a4472.tar.xz kernel-qcow2-linux-3aef463222eaf1ca505629e93a0b64e4040a4472.zip | |
spi: dw: round up result of calculation for clock divider
Avoid ending up with a higher frequency than requested
Signed-off-by: Matthias Seidel <kernel@mseidel.net>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/spi/spi-dw.c')
| -rw-r--r-- | drivers/spi/spi-dw.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/spi/spi-dw.c b/drivers/spi/spi-dw.c index c85e4b327a4a..27960e46135d 100644 --- a/drivers/spi/spi-dw.c +++ b/drivers/spi/spi-dw.c @@ -300,7 +300,7 @@ static int dw_spi_transfer_one(struct spi_master *master, if (transfer->speed_hz != dws->current_freq) { if (transfer->speed_hz != chip->speed_hz) { /* clk_div doesn't support odd number */ - chip->clk_div = (dws->max_freq / transfer->speed_hz + 1) & 0xfffe; + chip->clk_div = (DIV_ROUND_UP(dws->max_freq, transfer->speed_hz) + 1) & 0xfffe; chip->speed_hz = transfer->speed_hz; } dws->current_freq = transfer->speed_hz; |