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2017-06-28spi: stm32: fix compatible to fit with new bindingsAmelie Delaunay1-1/+1
This patch updates of_device_id compatible string to fit with new bindings. Signed-off-by: Amelie Delaunay <amelie.delaunay@st.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2017-06-28spi: stm32: use SoC specific compatibleAmelie Delaunay1-2/+2
This patch replaces st,stm32-spi compatible with st,stm32h7-spi SoC specific compatible and updates the example accondingly. Signed-off-by: Amelie Delaunay <amelie.delaunay@st.com> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Mark Brown <broonie@kernel.org>
2017-06-23spi: stm32: fix error check on mbr being -veColin Ian King1-2/+2
The error check of mbr < 0 is always false because mbr is a u32. Make mbt an int so that a -ve error return from stm32_spi_prepare_mbr can be detected. Detected by CoverityScan, CID#1446586 ("Unsigned compared against 0") Signed-off-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2017-06-21spi: add driver for STM32 SPI controllerAmelie Delaunay3-0/+1277
The STM32 Serial Peripheral Interface (SPI) can be used to communicate with external devices while using the specific synchronous protocol. It supports a half-duplex, full-duplex and simplex synchronous, serial communication with external devices with 4-bit to 16/32-bit per word. It has two 8x/16x 8-bit embedded Rx and TxFIFOs with DMA capability. It can operate in master or slave mode. Signed-off-by: Amelie Delaunay <amelie.delaunay@st.com> Signed-off-by: Mark Brown <broonie@kernel.org>