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| author | David Lechner <dlechner@baylibre.com> | 2023-11-17 14:12:59 -0600 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2023-11-20 13:29:10 +0000 |
| commit | e6d5eb85e84aeace5e231b951ece86b20df9f63a (patch) | |
| tree | 070746556da931937dce713323bf585f231bef8f /drivers/spi/spi-axi-spi-engine.c | |
| parent | e16e71e3f3c4b73b20f8c79f7ce8465542a337e9 (diff) | |
| download | lwn-e6d5eb85e84aeace5e231b951ece86b20df9f63a.tar.gz lwn-e6d5eb85e84aeace5e231b951ece86b20df9f63a.zip | |
spi: axi-spi-engine: check for valid clock rate
This adds a check for a valid SCLK rate in the axi-spi-engine driver
during probe. A valid rate is required to get accurate timing for delays
and by not allowing 0 we can avoid divide by zero errors later without
additional checks.
Signed-off-by: David Lechner <dlechner@baylibre.com>
Link: https://lore.kernel.org/r/20231117-axi-spi-engine-series-1-v1-8-cc59db999b87@baylibre.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/spi/spi-axi-spi-engine.c')
| -rw-r--r-- | drivers/spi/spi-axi-spi-engine.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/spi/spi-axi-spi-engine.c b/drivers/spi/spi-axi-spi-engine.c index 819744246952..8a6fbb3bb3f1 100644 --- a/drivers/spi/spi-axi-spi-engine.c +++ b/drivers/spi/spi-axi-spi-engine.c @@ -532,6 +532,9 @@ static int spi_engine_probe(struct platform_device *pdev) host->transfer_one_message = spi_engine_transfer_one_message; host->num_chipselect = 8; + if (host->max_speed_hz == 0) + return dev_err_probe(&pdev->dev, -EINVAL, "spi_clk rate is 0"); + ret = devm_spi_register_controller(&pdev->dev, host); if (ret) return ret; |