From: "Ivan T. Ivanov" <iivanov@xxxxxxxxxx> Hi, Following two patches are adding initial support for SPI controller available in Qualcomm SoC's. Controller initialization is based on spi_qsd driver available in CAF repository. Controller supports SPI_CPOL | SPI_CPHA | SPI_CS_HIGH | SPI_LOOP modes, up to 4 CS's and from 4 to 32 bits per word. SPI_LOOP mode is limited to input FIFO buffer size. Currently driver support only PIO mode, I am hopping to add also DMA mode support with dmaengine patches developed by Andy. Changes since first version: - Replace master::transfer_one_message with master::transfer_one and master::set_cs. - Use full controller version for compatible string "qcom,spi-qup-v2.1.1" and "qcom,spi-qup-v2.2.1". - Ensure that controller internal state is changed only if it is in valid state. - Ensure that resources shared between interrupt and thread context are properly protected. - Use controller auto clock gating for run time power management, instead full clock stop. This should have the same net result, right? - Simplify a bit read and write FIFO routines. - Several useless print messages removed. Ivan T. Ivanov (2): spi: qup: Add device tree bindings information spi: Add Qualcomm QUP SPI controller support .../devicetree/bindings/spi/qcom,spi-qup.txt | 85 ++ drivers/spi/Kconfig | 13 + drivers/spi/Makefile | 1 + drivers/spi/spi-qup.c | 837 ++++++++++++++++++++ 4 files changed, 936 insertions(+) create mode 100644 Documentation/devicetree/bindings/spi/qcom,spi-qup.txt create mode 100644 drivers/spi/spi-qup.c -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-arm-msm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
