This patch allows to set up the bits per word together with all other SPI
parameters in the SPI Node of the OF device tree
In the node, you then have to include the 'spi-bits' property.
Exemple:
fpga-loader@7 {
compatible = "cs,fpga-loader";
spi-max-frequency = <10000000>;
reg = <7>;
spi-cs-high;
spi-bits = <16>;
};
Signed-off-by: Christophe Leroy <[email protected]>
--- linux-3.8.13/drivers/spi/spi.c 2013-05-11 22:57:46.000000000 +0200
+++ linux/drivers/spi/spi.c 2013-08-06 18:19:30.000000000 +0200
@@ -870,6 +870,11 @@
if (of_find_property(nc, "spi-3wire", NULL))
spi->mode |= SPI_3WIRE;
+ /* Bits per word */
+ prop = of_get_property(nc, "spi-bits", &len);
+ if (prop && len >= sizeof(*prop))
+ spi->bits_per_word = prop[0];
+
/* Device speed */
prop = of_get_property(nc, "spi-max-frequency", &len);
if (!prop || len < sizeof(*prop)) {
--
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