linux-kernel - Re: [PATCH v4 1/3] riscv: dts: Add dma-channels property in dma node

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Date:   Tue, 18 Jan 2022 15:04:16 +0000
From:   <Conor.Dooley@...rochip.com>
To:     <zong.li@...ive.com>, <robh+dt@...nel.org>,
        <paul.walmsley@...ive.com>, <palmer@...belt.com>,
        <aou@...s.berkeley.edu>, <krzysztof.kozlowski@...onical.com>,
        <geert@...ux-m68k.org>, <bin.meng@...driver.com>,
        <green.wan@...ive.com>, <vkoul@...nel.org>,
        <dmaengine@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <linux-riscv@...ts.infradead.org>
Subject: Re: [PATCH v4 1/3] riscv: dts: Add dma-channels property in dma node

On 17/01/2022 01:35, Zong Li wrote:
> EXTERNAL EMAIL: Do not click links or open attachments unless you know the content is safe
> 
> Add dma-channels property, then we can determine how many channels there
> by device tree.
> 
> Signed-off-by: Zong Li <zong.li@...ive.com>
> ---
>   arch/riscv/boot/dts/microchip/microchip-mpfs.dtsi | 1 +
>   arch/riscv/boot/dts/sifive/fu540-c000.dtsi        | 1 +
>   2 files changed, 2 insertions(+)
> 
> diff --git a/arch/riscv/boot/dts/microchip/microchip-mpfs.dtsi b/arch/riscv/boot/dts/microchip/microchip-mpfs.dtsi
> index c9f6d205d2ba..3c48f2d7a4a4 100644
> --- a/arch/riscv/boot/dts/microchip/microchip-mpfs.dtsi
> +++ b/arch/riscv/boot/dts/microchip/microchip-mpfs.dtsi
> @@ -188,6 +188,7 @@ dma@...0000 {
>                          reg = <0x0 0x3000000 0x0 0x8000>;
>                          interrupt-parent = <&plic>;
>                          interrupts = <23 24 25 26 27 28 29 30>;
> +                       dma-channels = <4>;
>                          #dma-cells = <1>;
>                  };
For mpfs: Acked-by: Conor Dooley <conor.dooley@...rochip.com>

> 
> diff --git a/arch/riscv/boot/dts/sifive/fu540-c000.dtsi b/arch/riscv/boot/dts/sifive/fu540-c000.dtsi
> index 0655b5c4201d..2bdfe7f06e4b 100644
> --- a/arch/riscv/boot/dts/sifive/fu540-c000.dtsi
> +++ b/arch/riscv/boot/dts/sifive/fu540-c000.dtsi
> @@ -171,6 +171,7 @@ dma: dma@...0000 {
>                          reg = <0x0 0x3000000 0x0 0x8000>;
>                          interrupt-parent = <&plic0>;
>                          interrupts = <23 24 25 26 27 28 29 30>;
> +                       dma-channels = <4>;
>                          #dma-cells = <1>;
>                  };
>                  uart1: serial@...11000 {
> --
> 2.31.1
>