diff mbox series

spi: xilinx: Add DT support for selecting transfer word width

Message ID 20191024110757.25820-3-alvaro.gamez@hazent.com (mailing list archive)
State Accepted
Headers show
Series spi: xilinx: Add DT support for selecting transfer word width | expand

Commit Message

Alvaro Gamez Oct. 24, 2019, 11:07 a.m. UTC 
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>
---
 drivers/spi/spi-xilinx.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/spi/spi-xilinx.c b/drivers/spi/spi-xilinx.c
index 92ea22fedb33..46bb103ef30e 100644
--- a/drivers/spi/spi-xilinx.c
+++ b/drivers/spi/spi-xilinx.c
@@ -380,7 +380,7 @@  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;
@@ -392,6 +392,11 @@  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) {