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SubjectRe: [PATCH v8 0/4] Determine the number of DMA channels by 'dma-channels' property
On 30-03-22, 20:15, Palmer Dabbelt wrote:
> On Mon, 28 Mar 2022 02:52:21 PDT (-0700), zong.li@sifive.com wrote:
> > The PDMA driver currently assumes there are four channels by default, it
> > might cause the error if there is actually less than four channels.
> > Change that by getting number of channel dynamically from device tree.
> > For backwards-compatible, it uses the default value (i.e. 4) when there
> > is no 'dma-channels' information in dts.
> >
> > This patch set contains the dts and dt-bindings change.
> >
> > Changed in v8:
> > - Rebase on master
> > - Remove modification of microchip-mpfs.dtsi
> > - Rename DMA node name of fu540-c000.dtsi
> >
> > Changed in v7:
> > - Rebase on tag v5.17-rc7
> > - Modify the subject of patch
> >
> > Changed in v6:
> > - Rebase on tag v5.17-rc6
> > - Change sf_pdma.chans[] to a flexible array member.
> >
> > Changed in v5:
> > - Rebase on tag v5.17-rc3
> > - Fix typo in dt-bindings and commit message
> > - Add PDMA versioning scheme for compatible
> >
> > Changed in v4:
> > - Remove cflags of debug use reported-by: kernel test robot <lkp@intel.com>
> >
> > Changed in v3:
> > - Fix allocating wrong size
> > - Return error if 'dma-channels' is larger than maximum
> >
> > Changed in v2:
> > - Rebase on tag v5.16
> > - Use 4 as default value of dma-channels
> >
> > Zong Li (4):
> > dt-bindings: dma-engine: sifive,fu540: Add dma-channels property and
> > modify compatible
> > riscv: dts: Add dma-channels property and modify compatible
> > riscv: dts: rename the node name of dma
> > dmaengine: sf-pdma: Get number of channel by device tree
> >
> > .../bindings/dma/sifive,fu540-c000-pdma.yaml | 19 +++++++++++++--
> > arch/riscv/boot/dts/sifive/fu540-c000.dtsi | 5 ++--
> > drivers/dma/sf-pdma/sf-pdma.c | 24 ++++++++++++-------
> > drivers/dma/sf-pdma/sf-pdma.h | 8 ++-----
> > 4 files changed, 38 insertions(+), 18 deletions(-)
>
> Thanks, these are on for-next.

The drivers/dma/ should go thru dmaengine tree. During merge window I
dont apply the patches

--
~Vinod

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