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| author | Devyn Liu <liudingyuan@huawei.com> | 2024-07-30 11:20:39 +0800 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2024-07-30 13:27:37 +0100 |
| commit | c3c4f22b7c814a6ee485ce294065836f8ede30fa (patch) | |
| tree | 7d21b972d6197098ac8e5574e353878f4298702a | |
| parent | 8400291e289ee6b2bf9779ff1c83a291501f017b (diff) | |
| download | linux-stable-c3c4f22b7c814a6ee485ce294065836f8ede30fa.tar.gz linux-stable-c3c4f22b7c814a6ee485ce294065836f8ede30fa.tar.bz2 linux-stable-c3c4f22b7c814a6ee485ce294065836f8ede30fa.zip | |
spi: hisi-kunpeng: Add validation for the minimum value of speed_hz
The speed specified by the user is used to calculate the clk_div based
on the max_speed_hz in hisi_calc_effective_speed. A very low speed
value can lead to a clk_div larger than the variable range. Avoid this
by setting the min_speed_hz so that such a small speed value is
rejected. __spi_validate() in spi.c will return -EINVAL for the
specified speed_hz lower than min_speed_hz.
Signed-off-by: Devyn Liu <liudingyuan@huawei.com>
Reviewed-by: Jay Fang <f.fangjian@huawei.com>
Link: https://patch.msgid.link/20240730032040.3156393-2-liudingyuan@huawei.com
Signed-off-by: Mark Brown <broonie@kernel.org>
| -rw-r--r-- | drivers/spi/spi-hisi-kunpeng.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/spi/spi-hisi-kunpeng.c b/drivers/spi/spi-hisi-kunpeng.c index 77e9738e42f6..6910b4d4c427 100644 --- a/drivers/spi/spi-hisi-kunpeng.c +++ b/drivers/spi/spi-hisi-kunpeng.c @@ -495,6 +495,7 @@ static int hisi_spi_probe(struct platform_device *pdev) host->transfer_one = hisi_spi_transfer_one; host->handle_err = hisi_spi_handle_err; host->dev.fwnode = dev->fwnode; + host->min_speed_hz = DIV_ROUND_UP(host->max_speed_hz, CLK_DIV_MAX); hisi_spi_hw_init(hs); |