diff options
| author | Amelie Delaunay <amelie.delaunay@st.com> | 2020-08-10 09:12:36 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-09-03 11:24:24 +0200 |
| commit | ca57f450507548d2eb14a15764e0f159c784c842 (patch) | |
| tree | 24fc94a96b3af9d237309c661a915a63fa8a0114 /drivers/spi | |
| parent | 4aaac9c537b79ffd0602db06cd5127a455e49275 (diff) | |
spi: stm32: fix stm32_spi_prepare_mbr in case of odd clk_rate
[ Upstream commit 9cc61973bf9385b19ff5dda4a2a7e265fcba85e4 ]
Fix spi->clk_rate when it is odd to the nearest lowest even value because
minimum SPI divider is 2.
Signed-off-by: Amelie Delaunay <amelie.delaunay@st.com>
Signed-off-by: Alain Volmat <alain.volmat@st.com>
Link: https://lore.kernel.org/r/1597043558-29668-4-git-send-email-alain.volmat@st.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/spi')
| -rw-r--r-- | drivers/spi/spi-stm32.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/spi/spi-stm32.c b/drivers/spi/spi-stm32.c index ad1e55d3d5d5..391a20b3d2fd 100644 --- a/drivers/spi/spi-stm32.c +++ b/drivers/spi/spi-stm32.c @@ -254,7 +254,8 @@ static int stm32_spi_prepare_mbr(struct stm32_spi *spi, u32 speed_hz) { u32 div, mbrdiv; - div = DIV_ROUND_UP(spi->clk_rate, speed_hz); + /* Ensure spi->clk_rate is even */ + div = DIV_ROUND_UP(spi->clk_rate & ~0x1, speed_hz); /* * SPI framework set xfer->speed_hz to master->max_speed_hz if |