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spi: omap2-mcspi: Correctly handle devm_clk_get_optional() errors

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devm_clk_get_optional() returns NULL for missing clocks and a PTR_ERR()
if there is a clock but we fail to get it, but currently we only handle
the latter case and do so as though the clock was missing.  If we get an
error back we should handle that as an error since the clock exists but
we failed to get it, if we get NULL then the clock doesn't exist and we
should handle that.

Fixes: 4c6ac5446d ("spi: omap2-mcspi: Fix the IS_ERR() bug for devm_clk_get_optional_enabled()")
Reported-by: Lars Pedersen <lapeddk@gmail.com>
Link: https://patch.msgid.link/20250117-spi-fix-omap2-optional-v1-1-e77d4ac6db6e@kernel.org
Signed-off-by: Mark Brown <broonie@kernel.org>
Tested-by: Lars Pedersen <lapeddk@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Mark Brown 2025-01-17 16:16:03 +00:00
parent 78b435c904
commit a07eb4f67e
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1 changed files with 8 additions and 3 deletions
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11
drivers/spi/spi-omap2-mcspi.c
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@ -1561,10 +1561,15 @@ static int omap2_mcspi_probe(struct platform_device *pdev)
}
mcspi->ref_clk = devm_clk_get_optional_enabled(&pdev->dev, NULL);
if (IS_ERR(mcspi->ref_clk))
mcspi->ref_clk_hz = OMAP2_MCSPI_MAX_FREQ;
else
if (IS_ERR(mcspi->ref_clk)) {
status = PTR_ERR(mcspi->ref_clk);
dev_err_probe(&pdev->dev, status, "Failed to get ref_clk");
goto free_ctlr;
}
if (mcspi->ref_clk)
mcspi->ref_clk_hz = clk_get_rate(mcspi->ref_clk);
else
mcspi->ref_clk_hz = OMAP2_MCSPI_MAX_FREQ;
ctlr->max_speed_hz = mcspi->ref_clk_hz;
ctlr->min_speed_hz = mcspi->ref_clk_hz >> 15;