Hi all, This patch series adds support for DMA on the R-Car V4H SoC, to be used (for now) by: - I2C, - the HSCIF0 serial port, - the newly-added MSIOF SPI support. HSCIF0 DMA was tested on the White Hawk development board by removing the uart_console() check from sci_request_dma(). MSIOF1 and MSIOF2 were tested on the MSIOF Pin Headers on the White Hawk development board using a logic analyzer, and internal and external loopback with the spi-loopback-test module, cfr. the DT overlays at [1]. Unfortunately I don't know how to test I2C DMA: all transfers used by the AT24 EEPROM driver seem to be either too small, or unsafe for DMA. Anyone who knows a good test client? I plan to queue these in renesas-devel-for-v6.2. Thanks! [1] https://git.kernel.org/pub/scm/linux/kernel/git/geert/renesas-drivers.git/commit/?h=topic/renesas-overlays&id=88f65e516d426aaa105416557f8157a38147cb21 Geert Uytterhoeven (2): arm64: dts: renesas: r8a779g0: Add DMA support arm64: dts: renesas: r8a779g0: Add MSIOF nodes arch/arm64/boot/dts/renesas/r8a779g0.dtsi | 187 ++++++++++++++++++++++ 1 file changed, 187 insertions(+) -- 2.25.1 Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds
