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SubjectRe: [PATCH v8 0/4] Determine the number of DMA channels by 'dma-channels' property
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On Wed, 30 Mar 2022 22:21:56 PDT (-0700), vkoul@kernel.org wrote:
> 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

OK, I can drop this from my tree if you'd like?

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