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spi: cadence-qspi: assert each subnode flash CS is valid 

Check each flash CS against the num-cs property from devicetree.
Fallback to the driver max supported value (CQSPI_MAX_CHIPSELECT) if
num-cs isn't present.

cqspi->num_chipselect is set in cqspi_of_get_pdata() to the num-cs
devicetree property, or to CQSPI_MAX_CHIPSELECT if num-cs is not set.

Signed-off-by: Théo Lebrun <theo.lebrun@bootlin.com>
Reviewed-by: Dhruva Gole <d-gole@ti.com>
Link: https://msgid.link/r/20240209-cdns-qspi-cs-v1-1-a4f9dfed9ab4@bootlin.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Théo Lebrun 2024-02-09 14:45:30 +01:00 committed by Mark Brown
parent afd2a4ae29
commit 0d62c64a8e
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1 changed files with 1 additions and 1 deletions
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2
drivers/spi/spi-cadence-quadspi.c
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@ -1635,7 +1635,7 @@ static int cqspi_setup_flash(struct cqspi_st *cqspi)
return ret; return ret;
} }
if (cs >= CQSPI_MAX_CHIPSELECT) { if (cs >= cqspi->num_chipselect) {
dev_err(dev, "Chip select %d out of range.\n", cs); dev_err(dev, "Chip select %d out of range.\n", cs);
of_node_put(np); of_node_put(np);
return -EINVAL; return -EINVAL;