This series(v2) addressed the review comments provided by Andre, and there are changes in patch 1/10, 2/10, 5/10 and 9/10.
* Accessor function (to get the frame lenght) has moved from patch 2/9 to patch 1/9 with inline removed. * Removed the unnecessary line break. * Added comments about the way DMA descriptor differs between S700 and S900. * Added a macro to define fcnt value. * Updated dma DT bindings. * Used SoC secific compatible string for MMC. Apart from it, a new patch 8/10 is added in this series to update mmc DT bindings. Series is rebased on 5.7.0-rc6. ---------------------------------------------------------------------- Series(v1) have following changes from the previous series. New patch(5/8) has been introduced that converts dma dt-binding for Actions OWL SoC from text format to yaml file. For patch(2/8) new accessor function is added to get the frame lenght which is common to both S900 and S700. Apart from it SoC check is removed from irq routine as it is not needed. Patch(4/8) which is an hack to prove our DMA and MMC works for S700 is now sent as *do not merge* patch. DMA is tested using dmatest with follwoing result: root@ubuntu:~# echo dma0chan1 > /sys/module/dmatest/parameters/channel root@ubuntu:~# echo 2000 > /sys/module/dmatest/parameters/timeout root@ubuntu:~# echo 1 > /sys/module/dmatest/parameters/iterations root@ubuntu:~# echo 1 > /sys/module/dmatest/parameters/run root@ubuntu:~# dmesg | tail [ 303.362586] dmatest: Added 1 threads using dma0chan1 [ 317.258658] dmatest: Started 1 threads using dma0chan1 [ 317.259397] dmatest: dma0chan1-copy0: summary 1 tests, 0 failures 16129.03 iops 32258 KB/s (0) ------------------------------------------------------------------------------- The intention of RFC series is to enable uSD and DMA support for Cubieboard7 based on Actions S700 SoC, and on the way we found that it requires changes in dmaengine present on S700 as its different from what is present on S900. Patch(1/8) does provide a new way to describe DMA descriptor, idea is to remove the bit-fields as its less maintainable. It is only build tested and it would be great if this can be tested on S900 based hardware. Patch(2/8) adds S700 DMA engine support, there is new compatible string added for it, which means a changed bindings needed to submitted for this. I would plan to send it later the converted "owl-dma.yaml". Patch(4/8) disables the sps node as its memory range is conflicting pinctrl node and results in pinctrl proble failure. Rest of patches in the series adds DMA/MMC nodes for S700 alone with binding constants and enables the uSD for Cubieboard7. This whole series is tested, by building/compiling Kernel on Cubieboard7-lite which was *almost* successful (OOM kicked in, while Linking due to less RAM present on hardware). Following is the mmc speed : ubuntu@ubuntu:~$ sudo hdparm -tT /dev/mmcblk0 /dev/mmcblk0: Timing cached reads: 1310 MB in 2.00 seconds = 655.15 MB/sec Timing buffered disk reads: 62 MB in 3.05 seconds = 20.30 MB/sec Amit Singh Tomar (10): dmaengine: Actions: get rid of bit fields from dma descriptor dmaengine: Actions: Add support for S700 DMA engine clk: actions: Add MMC clock-register reset bits arm64: dts: actions: do not merge disable sps node from S700 dt-bindings: dmaengine: convert Actions Semi Owl SoCs bindings to yaml arm64: dts: actions: Add DMA Controller for S700 dt-bindings: reset: s700: Add binding constants for mmc dt-bindings: mmc: owl: add compatible string actions,s700-mmc arm64: dts: actions: Add MMC controller support for S700 arm64: dts: actions: Add uSD support for Cubieboard7 Documentation/devicetree/bindings/dma/owl-dma.txt | 47 -------- Documentation/devicetree/bindings/dma/owl-dma.yaml | 76 +++++++++++++ Documentation/devicetree/bindings/mmc/owl-mmc.yaml | 6 +- arch/arm64/boot/dts/actions/s700-cubieboard7.dts | 41 +++++++ arch/arm64/boot/dts/actions/s700.dtsi | 48 ++++++++ drivers/clk/actions/owl-s700.c | 3 + drivers/dma/owl-dma.c | 126 ++++++++++++--------- include/dt-bindings/reset/actions,s700-reset.h | 3 + 8 files changed, 251 insertions(+), 99 deletions(-) delete mode 100644 Documentation/devicetree/bindings/dma/owl-dma.txt create mode 100644 Documentation/devicetree/bindings/dma/owl-dma.yaml -- 2.7.4
