Add support for Nvida Tegra general purpose DMA driver for Tegra186 and Tegra194 platform. Changes in patch v7: * changed function name / position changes for consistency. * moved tegra_dma_start to isr and removed to_terminate flag. * Updates in register reads, variables and checks based on comments in v6. * Corrections in prints as per comments in v6 * Updated the logic to get dma burst size * Handled the case where the vchan_find_desc() return NULL, but the descriptor is in progress v6 - https://lkml.org/lkml/2021/9/17/652 v2..v5 - https://lkml.org/lkml/2021/9/16/455 v1 - https://lkml.org/lkml/2020/7/20/96 Akhil R (4): dt-bindings: dmaengine: Add doc for tegra gpcdma dmaengine: tegra: Add tegra gpcdma driver arm64: defconfig: tegra: Enable GPCDMA arm64: tegra: Add GPCDMA node for tegra186 and tegra194 .../bindings/dma/nvidia,tegra186-gpc-dma.yaml | 98 ++ arch/arm64/boot/dts/nvidia/tegra186-p3310.dtsi | 4 + arch/arm64/boot/dts/nvidia/tegra186.dtsi | 44 + arch/arm64/boot/dts/nvidia/tegra194-p2888.dtsi | 4 + arch/arm64/boot/dts/nvidia/tegra194.dtsi | 44 + arch/arm64/configs/defconfig | 1 + drivers/dma/Kconfig | 12 + drivers/dma/Makefile | 1 + drivers/dma/tegra186-gpc-dma.c | 1354 ++++++++++++++++++++ 9 files changed, 1562 insertions(+) create mode 100644 Documentation/devicetree/bindings/dma/nvidia,tegra186-gpc-dma.yaml create mode 100644 drivers/dma/tegra186-gpc-dma.c -- 2.7.4
