spi: qup: Fix cs-num DT property parsing

[ Upstream commit 12cb89e37a0c25fae7a0f1d2e4985558db9d0b13 ]

num-cs is 32 bit property, don't read just upper 16 bits.

Fixes: 4a8573abe965 (spi: qup: Remove chip select function)
Signed-off-by: Ivan T. Ivanov <iivanov@mm-sol.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>

diff --git a/drivers/spi/spi-qup.c b/drivers/spi/spi-qup.c
index 9f83d29507488a5a6d76f6c7be9fbb57dc6b79cd..6976f8aa85629ddff8ac0a47dfd9c30f3dc2086a 100644 (file)
--- a/drivers/spi/spi-qup.c
+++ b/drivers/spi/spi-qup.c
@@ -489,7 +489,7 @@ static int spi_qup_probe(struct platform_device *pdev)
        struct resource *res;
        struct device *dev;
        void __iomem *base;
-       u32 max_freq, iomode;
+       u32 max_freq, iomode, num_cs;
        int ret, irq, size;
 
        dev = &pdev->dev;
@@ -541,10 +541,11 @@ static int spi_qup_probe(struct platform_device *pdev)
        }
 
        /* use num-cs unless not present or out of range */
-       if (of_property_read_u16(dev->of_node, "num-cs",
-                       &master->num_chipselect) ||
-                       (master->num_chipselect > SPI_NUM_CHIPSELECTS))
+       if (of_property_read_u32(dev->of_node, "num-cs", &num_cs) ||
+           num_cs > SPI_NUM_CHIPSELECTS)
                master->num_chipselect = SPI_NUM_CHIPSELECTS;
+       else
+               master->num_chipselect = num_cs;
 
        master->bus_num = pdev->id;
        master->mode_bits = SPI_CPOL | SPI_CPHA | SPI_CS_HIGH | SPI_LOOP;