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| author | Zhao Qiang <B45475@freescale.com> | 2014-04-01 17:10:50 +0800 |
|---|---|---|
| committer | Mark Brown <broonie@linaro.org> | 2014-04-14 17:17:01 +0100 |
| commit | cd6339e6ced387ad67b5551dd2931cfd7e8b970b (patch) | |
| tree | c3222a2ff83afd95c9cd48a6cc602222298dd362 | |
| parent | c9eaa447e77efe77b7fa4c953bd62de8297fd6c5 (diff) | |
| download | linux-cd6339e6ced387ad67b5551dd2931cfd7e8b970b.tar.gz linux-cd6339e6ced387ad67b5551dd2931cfd7e8b970b.tar.bz2 linux-cd6339e6ced387ad67b5551dd2931cfd7e8b970b.zip | |
spi: add "spi-lsb-first" to devicetree
add optional property devicetree for SPI slave nodes
into devicetree so that LSB mode can be enabled by devicetree.
Signed-off-by: Zhao Qiang <B45475@freescale.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
| -rw-r--r-- | Documentation/devicetree/bindings/spi/spi-bus.txt | 2 | ||||
| -rw-r--r-- | drivers/spi/spi.c | 2 |
2 files changed, 4 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/spi/spi-bus.txt b/Documentation/devicetree/bindings/spi/spi-bus.txt index e5a4d1b4acfe..22d57404fdc3 100644 --- a/Documentation/devicetree/bindings/spi/spi-bus.txt +++ b/Documentation/devicetree/bindings/spi/spi-bus.txt @@ -55,6 +55,8 @@ contain the following properties. chip select active high - spi-3wire - (optional) Empty property indicating device requires 3-wire mode. +- spi-lsb-first - (optional) Empty property indicating device requires + LSB first mode. - spi-tx-bus-width - (optional) The bus width(number of data wires) that used for MOSI. Defaults to 1 if not present. - spi-rx-bus-width - (optional) The bus width(number of data wires) that diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c index 4eb9bf02996c..214045c04705 100644 --- a/drivers/spi/spi.c +++ b/drivers/spi/spi.c @@ -1234,6 +1234,8 @@ static void of_register_spi_devices(struct spi_master *master) spi->mode |= SPI_CS_HIGH; if (of_find_property(nc, "spi-3wire", NULL)) spi->mode |= SPI_3WIRE; + if (of_find_property(nc, "spi-lsb-first", NULL)) + spi->mode |= SPI_LSB_FIRST; /* Device DUAL/QUAD mode */ if (!of_property_read_u32(nc, "spi-tx-bus-width", &value)) { |