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* dm: spi: Add soft_spi implementationSimon Glass2014-10-22-0/+34
| | | | | | | | Add a new implementation of soft_spi that uses device tree to specify the GPIOs. This will replace soft_spi_legacy for boards which use driver model. Signed-off-by: Simon Glass <sjg@chromium.org> Reviewed-by: Jagannadha Sutradharudu Teki <jagannadh.teki@gmail.com>
* spi: Support half-duplex mode in FDT decodeSimon Glass2014-08-06-0/+2
| | | | | | | | This parameter should also be supported. Signed-off-by: Simon Glass <sjg@chromium.org> Tested-by: Ajay Kumar <ajaykumar.rs@samsung.com> Reviewed-by: Jagannadha Sutradharudu Teki <jaganna@xilinx.com>
* spi: Add device tree binding for SPI busSimon Glass2013-12-09-0/+92
This was obtained from Linux 3.12 commit 5e01dc7b26. Signed-off-by: Simon Glass <sjg@chromium.org>