linux-kernel - Re: [PATCH v4 12/12] arm64: dts: st: add HPDMA nodes on stm32mp251

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Date: Thu, 27 Jun 2024 16:22:41 +0200
From: Alexandre TORGUE <alexandre.torgue@...s.st.com>
To: Amelie Delaunay <amelie.delaunay@...s.st.com>,
        Vinod Koul
	<vkoul@...nel.org>, Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski
	<krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>
CC: <dmaengine@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-stm32@...md-mailman.stormreply.com>,
        <linux-arm-kernel@...ts.infradead.org>, <linux-kernel@...r.kernel.org>,
        <linux-hardening@...r.kernel.org>
Subject: Re: [PATCH v4 12/12] arm64: dts: st: add HPDMA nodes on stm32mp251

Hi Amélie

On 5/31/24 17:07, Amelie Delaunay wrote:
> The High Performance Direct Memory Access (HPDMA) controller is used to
> perform programmable data transfers between memory-mapped peripherals
> and memories (or between memories) via linked-lists.
> 
> There are 3 instances of HPDMA on stm32mp251, using stm32-dma3 driver, with
> 16 channels per instance and with one interrupt per channel.
> Channels 0 to 7 are implemented with a FIFO of 8 bytes.
> Channels 8 to 11 are implemented with a FIFO of 32 bytes.
> Channels 12 to 15 are implemented with a FIFO of 128 bytes.
> Thanks to stm32-dma3 bindings, the user can ask for a channel with specific
> FIFO size.
> 
> Signed-off-by: Amelie Delaunay <amelie.delaunay@...s.st.com>
> ---
> v4: use SCMI clocks now that they are available
> 
> v2: use SoC specific compatible st,stm32mp25-dma3
> ---
>   arch/arm64/boot/dts/st/stm32mp251.dtsi | 69 ++++++++++++++++++++++++++
>   1 file changed, 69 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/st/stm32mp251.dtsi b/arch/arm64/boot/dts/st/stm32mp251.dtsi
> index dcd0656d67a8..d057dcee2534 100644
> --- a/arch/arm64/boot/dts/st/stm32mp251.dtsi
> +++ b/arch/arm64/boot/dts/st/stm32mp251.dtsi
> @@ -107,6 +107,75 @@ soc@0 {
>   		interrupt-parent = <&intc>;

...

Applied on stm32-next.

Thanks!!
Alex