From: Cezary Gapinski <cezary.gapinski@xxxxxxxxx> This series of patches adds support for first generation of SPI interface for STM32F4 family. This version of driver is mostly different to STM32H7 one. Based on linux kernel I2C drivers for STM32 where drivers were splited into STM32F4 and STM32F7 family the same approach seems to be sufficient for SPI STM32 drivers. Therefore STM32H7 driver was moved to spi-stm32h7.c file and register and functions were renamed to be more specific to STM32H7. For current version master mode with full-duplex and 8/16 bit data frame format are supported. There is no TX and RX FIFOs like in STM32H7. DMA capabilility is supported for messages longer than arbitrary number of bytes (that is set already to 16 bytes) when TX and RX channels are set at the same time. v2: Based on Amelie Delaunay recommendation only one common file spi-stm32.c is used. Before adding support for STM32F4 driver, first six patches adds some improvements to actual driver. Next patches rearrange driver to be more useful for new STM32F4 SPI and adding support for this family. This version also supports simplex-tx and 3wire-tx modes. Cezary Gapinski (14): spi: stm32: switch to SPDX identifier spi: stm32: use NULL pointer instead of plain integer spi: stm32: fix DMA configuration with only one channel spi: fix typo in SPI_STM32 help text spi: stm32: use explicit CPOL and CPHA mode bits spi: stm32: remove SPI LOOP mode spi: stm32: rename STM32 SPI registers to STM32H7 spi: stm32: rename interrupt function spi: stm32: split transfer one setup function spi: stm32: add start dma transfer function spi: stm32: introduce compatible data cfg spi: stm32: add support for STM32F4 ARM: dts: stm32: add SPI support on STM32F429 SoC spi: stm32: add description about STM32F4 bindings .../devicetree/bindings/spi/spi-stm32.txt | 9 +- arch/arm/boot/dts/stm32f429.dtsi | 60 + drivers/spi/Kconfig | 2 +- drivers/spi/spi-stm32.c | 1403 +++++++++++++++----- 4 files changed, 1139 insertions(+), 335 deletions(-) -- 2.7.4
