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authorAlvaro Gamez Machado <alvaro.gamez@hazent.com>2019-10-24 14:07:56 +0300
committerMark Brown <broonie@kernel.org>2019-10-24 14:45:21 +0300
commite58f7d15e6beb255b3907054a0536db77c979a31 (patch)
treee8b15238f3cf0855678cd1c80763558f04e6cb7b /drivers/spi
parente3354b17b4ac10ad2c23e244444ab38927a69ee9 (diff)
downloadlinux-e58f7d15e6beb255b3907054a0536db77c979a31.tar.xz
spi: xilinx: Add DT support for selecting transfer word width
This core supports either 8, 16 or 32 bits as word width. This value is only settable on instantiation, and thus we need to support any of them by means of the device tree. Signed-off-by: Alvaro Gamez Machado <alvaro.gamez@hazent.com> Link: https://lore.kernel.org/r/20191024110757.25820-3-alvaro.gamez@hazent.com Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/spi')
-rw-r--r--drivers/spi/spi-xilinx.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/spi/spi-xilinx.c b/drivers/spi/spi-xilinx.c
index d5f9d5fbb3e8..8dd2bb99cb4d 100644
--- a/drivers/spi/spi-xilinx.c
+++ b/drivers/spi/spi-xilinx.c
@@ -391,7 +391,7 @@ static int xilinx_spi_probe(struct platform_device *pdev)
struct xilinx_spi *xspi;
struct xspi_platform_data *pdata;
struct resource *res;
- int ret, num_cs = 0, bits_per_word = 8;
+ int ret, num_cs = 0, bits_per_word;
struct spi_master *master;
u32 tmp;
u8 i;
@@ -403,6 +403,11 @@ static int xilinx_spi_probe(struct platform_device *pdev)
} else {
of_property_read_u32(pdev->dev.of_node, "xlnx,num-ss-bits",
&num_cs);
+ ret = of_property_read_u32(pdev->dev.of_node,
+ "xlnx,num-transfer-bits",
+ &bits_per_word);
+ if (ret)
+ bits_per_word = 8;
}
if (!num_cs) {