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

[linux.git] / drivers / spi / spi-zynq-qspi.c

diff --git a/drivers/spi/spi-zynq-qspi.c b/drivers/spi/spi-zynq-qspi.c
index b1c56e9d7c94c5a88d36a6b4c58fa7d26e8abfd1..9f53ea08adf7abf97756870a21817437c86f0e1f 100644 (file)
--- a/drivers/spi/spi-zynq-qspi.c
+++ b/drivers/spi/spi-zynq-qspi.c
@@ -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;