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spi: zynq-qspi: Anything else than CS0 is not supported yet

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Unlike what the driver is currently advertizing, CS0 only can be used,
CS1 is not supported at all. Prevent people to use CS1.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/r/20191108140744.1734-2-miquel.raynal@bootlin.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Miquel Raynal 2019-11-08 15:07:38 +01:00 committed by Mark Brown
parent 9b10fa363b
commit 087622d094
No known key found for this signature in database
GPG key ID: 24D68B725D5487D0
1 changed files with 6 additions and 2 deletions
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8
drivers/spi/spi-zynq-qspi.c
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@ -680,10 +680,14 @@ static int zynq_qspi_probe(struct platform_device *pdev)
ret = of_property_read_u32(np, "num-cs",
&num_cs);
if (ret < 0)
if (ret < 0) {
ctlr->num_chipselect = ZYNQ_QSPI_DEFAULT_NUM_CS;
else
} else if (num_cs > ZYNQ_QSPI_DEFAULT_NUM_CS) {
dev_err(&pdev->dev, "anything but CS0 is not yet supported\n");
goto remove_master;
} else {
ctlr->num_chipselect = num_cs;
}
ctlr->mode_bits = SPI_RX_DUAL | SPI_RX_QUAD |
SPI_TX_DUAL | SPI_TX_QUAD;