[PATCH 00/10] dmaengine: sun6i: Fixes for H3/A83T, enable A64

Stefan Brüns
2017-09-03T22:44:39Z

Commit 3a03ea763a67 ("dmaengine: sun6i: Add support for Allwinner A83T
(sun8i) variant") and commit f008db8c00c1 ("dmaengine: sun6i: Add support for
Allwinner H3 (sun8i) variant") added support for the A83T resp. H3, but missed
some differences between the original A31 and A83T/H3.

The first patch add a variable to group different SoC generations, i.e. A31,
A23+A83T, H3+later, and uses it to for the correct clock autogating setting.

The second and fourth patches reuse this variable to reflect changes in the
channel config register, i.e. different field offsets, new burst widths/lengths.

The third patch restructures some code required for the fourth patch.

Patch 5 restructures the code to decouple some controller details (e.g. channel
count) from the compatible string/the config.

Patches 6, 7 and 8 introduce and use the "dma-chans" property for the A64. Although
register compatible to the H3, the channel count differs and thus it requires a
new compatible. To avoid introduction of new compatibles for each minor variation,
anything but the register model is moved to devicetree properties. There
is at least one SoC (R40) which can then reuse the A64 compatible, the same
would have worked for A83T+V3s.

Patches 9 and 10 add the DMA controller node to the devicetree and add the DMA
controller reference to the SPI nodes.

This patch series could be called v2, but the patches were split and significantly
restructured, thus listing changes individually is not to meaningful.

Stefan Brüns (10):
dmaengine: sun6i: Correct setting of clock autogating register for
A83T/H3
dmaengine: sun6i: Correct burst length field offsets for H3
dmaengine: sun6i: Restructure code to allow extension for new SoCs
dmaengine: sun6i: Enable additional burst lengths/widths on H3
dmaengine: sun6i: Move number of pchans/vchans/request to device
struct
arm64: allwinner: a64: Add devicetree binding for DMA controller
dmaengine: sun6i: Retrieve channel count/max request from devicetree
dmaengine: sun6i: Add support for Allwinner A64 and compatibles
arm64: allwinner: a64: Add device node for DMA controller
arm64: allwinner: a64: add dma controller references to spi nodes

.../devicetree/bindings/dma/sun6i-dma.txt | 26 +++
arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi | 15 ++
drivers/dma/sun6i-dma.c | 207 ++++++++++++++++-----
3 files changed, 197 insertions(+), 51 deletions(-)

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2.14.1