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spi: lpspi: run transfer speed_hz sanity check

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Avoid config.speed_hz is 0 when it is a divisor.

Signed-off-by: Han Xu <han.xu@nxp.com
Signed-off-by: Clark Wang <xiaoning.wang@nxp.com
Link: https://lore.kernel.org/r/20230505064159.3964473-1-xiaoning.wang@nxp.com
Signed-off-by: Mark Brown <broonie@kernel.org
This commit is contained in:
Clark Wang 2023-05-05 14:41:59 +08:00 committed by Mark Brown
parent 47e0255989
commit f571d9132e
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GPG Key ID: 24D68B725D5487D0
1 changed files with 6 additions and 0 deletions
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6
drivers/spi/spi-fsl-lpspi.c
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@ -303,6 +303,12 @@ static int fsl_lpspi_set_bitrate(struct fsl_lpspi_data *fsl_lpspi)
perclk_rate = clk_get_rate(fsl_lpspi->clk_per);
if (!config.speed_hz) {
dev_err(fsl_lpspi->dev,
"error: the transmission speed provided is 0!\n");
return -EINVAL;
}
if (config.speed_hz > perclk_rate / 2) {
dev_err(fsl_lpspi->dev,
"per-clk should be at least two times of transfer speed");