spi: zynq-qspi: Anything else than CS0 is not supported yet (087622d0) · Commits · 戴 / test

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:

drivers/spi/spi-zynq-qspi.c

+6 −2

Original line number	Diff line number	Diff line
		@@ -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;