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Subject[PATCH 3.16.y-ckt 086/144] spi: qup: Fix cs-num DT property parsing
Date
3.16.7-ckt10 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: "Ivan T. Ivanov" <iivanov@mm-sol.com>

commit 12cb89e37a0c25fae7a0f1d2e4985558db9d0b13 upstream.

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>
[ luis: backported to 3.16: adjusted context ]
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
---
drivers/spi/spi-qup.c | 9 +++++----
1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/drivers/spi/spi-qup.c b/drivers/spi/spi-qup.c
index c08da380cb23..7be89126c6ff 100644
--- a/drivers/spi/spi-qup.c
+++ b/drivers/spi/spi-qup.c
@@ -486,7 +486,7 @@ static int spi_qup_probe(struct platform_device *pdev)
struct resource *res;
struct device *dev;
void __iomem *base;
- u32 data, max_freq, iomode;
+ u32 data, max_freq, iomode, num_cs;
int ret, irq, size;

dev = &pdev->dev;
@@ -547,10 +547,11 @@ 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;

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