From: Binbin Zhou <zhoubb.aaron@gmail.com>
To: Vinod Koul <vkoul@kernel.org>
Cc: Huacai Chen <chenhuacai@kernel.org>,
Binbin Zhou <zhoubinbin@loongson.cn>,
Huacai Chen <chenhuacai@loongson.cn>,
Rob Herring <robh@kernel.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Conor Dooley <conor+dt@kernel.org>,
Frank Li <Frank.Li@kernel.org>,
dmaengine@vger.kernel.org, Xuerui Wang <kernel@xen0n.name>,
loongarch@lists.linux.dev, devicetree@vger.kernel.org,
Keguang Zhang <keguang.zhang@gmail.com>,
linux-mips@vger.kernel.org
Subject: Re: [PATCH v3 6/6] dmaengine: loongson: New driver for the Loongson Multi-Channel DMA controller
Date: Mon, 9 Mar 2026 16:05:03 +0800 [thread overview]
Message-ID: <CAMpQs4JX0jZuLk84QnW79cVrjA-Fs6oDx8Uq_cyTVLTaE3F8vg@mail.gmail.com> (raw)
In-Reply-To: <aa5yZ6xSW8yxm9gI@vaman>
On Mon, Mar 9, 2026 at 3:10 PM Vinod Koul <vkoul@kernel.org> wrote:
>
> On 26-02-26, 16:18, Huacai Chen wrote:
> > Hi, Binbin,
> >
> > On Wed, Feb 25, 2026 at 3:41 PM Binbin Zhou <zhoubinbin@loongson.cn> wrote:
> > >
> > > This DMA controller appears in Loongson-2K0300 and Loongson-2K3000.
> > >
> > > It is a chain multi-channel controller that enables data transfers from
> > > memory to memory, device to memory, and memory to device, as well as
> > > channel prioritization configurable through the channel configuration
> > > registers.
> > >
> > > In addition, there are slight differences between Loongson-2K0300 and
> > > Loongson-2K3000, such as channel register offsets and the number of
> > > channels.
> > >
> > > Signed-off-by: Binbin Zhou <zhoubinbin@loongson.cn>
> > > ---
> > > MAINTAINERS | 1 +
> > > drivers/dma/loongson/Kconfig | 10 +
> > > drivers/dma/loongson/Makefile | 1 +
> > > drivers/dma/loongson/loongson2-apb-cmc-dma.c | 729 +++++++++++++++++++
> > > 4 files changed, 741 insertions(+)
> > > create mode 100644 drivers/dma/loongson/loongson2-apb-cmc-dma.c
> > >
> > > diff --git a/MAINTAINERS b/MAINTAINERS
> > > index aea29c28d865..af9fbb3b43e2 100644
> > > --- a/MAINTAINERS
> > > +++ b/MAINTAINERS
> > > @@ -14954,6 +14954,7 @@ L: dmaengine@vger.kernel.org
> > > S: Maintained
> > > F: Documentation/devicetree/bindings/dma/loongson,ls2k0300-dma.yaml
> > > F: Documentation/devicetree/bindings/dma/loongson,ls2x-apbdma.yaml
> > > +F: drivers/dma/loongson/loongson2-apb-cmc-dma.c
> > > F: drivers/dma/loongson/loongson2-apb-dma.c
> > >
> > > LOONGSON LS2X I2C DRIVER
> > > diff --git a/drivers/dma/loongson/Kconfig b/drivers/dma/loongson/Kconfig
> > > index 9dbdaef5a59f..4278fbbe8096 100644
> > > --- a/drivers/dma/loongson/Kconfig
> > > +++ b/drivers/dma/loongson/Kconfig
> > > @@ -12,6 +12,16 @@ config LOONGSON1_APB_DMA
> > > This selects support for the APB DMA controller in Loongson1 SoCs,
> > > which is required by Loongson1 NAND and audio support.
> > >
> > > +config LOONGSON2_APB_CMC_DMA
> > > + tristate "Loongson2 Chain Multi-Channel DMA support"
> > > + select DMA_ENGINE
> > > + select DMA_VIRTUAL_CHANNELS
> > > + help
> > > + Support for the Loongson Chain Multi-Channel DMA controller driver.
> > > + It is discovered on the Loongson-2K chip (Loongson-2K0300/Loongson-2K3000),
> > > + which has 4/8 channels internally, enabling bidirectional data transfer
> > > + between devices and memory.
> > Moving this to after LOONGSON2_APB_DMA is a little better.
>
> Yes and we expect these files to be sorted, so this needs to be done
This is reorder on the latest patchset:
https://lore.kernel.org/all/cover.1772853681.git.zhoubinbin@loongson.cn/
>
> --
> ~Vinod
--
Thanks.
Binbin
prev parent reply other threads:[~2026-03-09 8:05 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-02-25 7:40 [PATCH v3 0/6] dmaengine: Add Loongson Multi-Channel DMA controller support Binbin Zhou
2026-02-25 7:40 ` [PATCH v3 1/6] dmaengine: loongson: New directory for Loongson DMA controllers drivers Binbin Zhou
2026-02-25 18:04 ` Frank Li
2026-02-25 7:40 ` [PATCH v3 2/6] dmaengine: loongson: loongson2-apb: Convert to dmaenginem_async_device_register() Binbin Zhou
2026-02-25 7:40 ` [PATCH v3 3/6] dmaengine: loongson: loongson2-apb: Convert to devm_clk_get_enabled() Binbin Zhou
2026-02-25 18:05 ` Frank Li
2026-02-25 7:41 ` [PATCH v3 4/6] dmaengine: loongson: loongson2-apb: Simplify locking with guard() and scoped_guard() Binbin Zhou
2026-02-25 18:06 ` Frank Li
2026-02-25 7:41 ` [PATCH v3 5/6] dt-bindings: dmaengine: Add Loongson Multi-Channel DMA controller Binbin Zhou
2026-03-06 0:52 ` Rob Herring (Arm)
2026-02-25 7:41 ` [PATCH v3 6/6] dmaengine: loongson: New driver for the " Binbin Zhou
2026-02-25 20:00 ` Frank Li
2026-02-26 8:18 ` Huacai Chen
2026-03-09 7:10 ` Vinod Koul
2026-03-09 8:05 ` Binbin Zhou [this message]
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