On Mon, Jul 7, 2014 at 9:46 PM, Simon Glass sjg@chromium.org wrote:
This parameter should also be supported.
Signed-off-by: Simon Glass sjg@chromium.org
doc/device-tree-bindings/spi/spi-bus.txt | 2 ++ drivers/spi/spi.c | 2 ++ 2 files changed, 4 insertions(+)
diff --git a/doc/device-tree-bindings/spi/spi-bus.txt b/doc/device-tree-bindings/spi/spi-bus.txt index 800dafe..5c8720a 100644 --- a/doc/device-tree-bindings/spi/spi-bus.txt +++ b/doc/device-tree-bindings/spi/spi-bus.txt @@ -59,6 +59,8 @@ contain the following properties. used for MOSI. Defaults to 1 if not present.
- spi-rx-bus-width - (optional) The bus width(number of data wires) that used for MISO. Defaults to 1 if not present.
+- spi-half-duplex - (optional) Indicates that the SPI bus should wait for
a header byte before reading data from the slave.Some SPI controllers and devices support Dual and Quad SPI transfer mode. It allows data in SPI system transfered in 2 wires(DUAL) or 4 wires(QUAD). diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c index 7ddea9b..7d81fbd 100644 --- a/drivers/spi/spi.c +++ b/drivers/spi/spi.c @@ -53,6 +53,8 @@ struct spi_slave *spi_base_setup_slave_fdt(const void *blob, int busnum, mode |= SPI_CPHA; if (fdtdec_get_bool(blob, node, "spi-cs-high")) mode |= SPI_CS_HIGH;
if (fdtdec_get_bool(blob, node, "spi-half-duplex"))mode |= SPI_PREAMBLE; return spi_setup_slave(busnum, cs, max_hz, mode);}
#endif
2.0.0.526.g5318336
U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
Able to test display on peach_pit(which needs tps65090) with these patches. Also, crosec commands from u-boot prompt works as expected on peach_pit.
Tested-by: Ajay Kumar ajaykumar.rs@samsung.com