linux-kernel - Re: [PATCH v2 2/7] ARM: dts: sun8i: v3s: add DMA properties to peripherals supporting DMA

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Message-ID: <20210514080756.3a6c0f53@slackpad.fritz.box>
Date:   Fri, 14 May 2021 08:07:56 +0100
From:   Andre Przywara <andre.przywara@....com>
To:     Tobias Schramm <t.schramm@...jaro.org>
Cc:     Jernej Škrabec <jernej.skrabec@...il.com>,
        devicetree@...r.kernel.org, Rob Herring <robh+dt@...nel.org>,
        Maxime Ripard <mripard@...nel.org>,
        Chen-Yu Tsai <wens@...e.org>,
        linux-arm-kernel@...ts.infradead.org, linux-sunxi@...ts.linux.dev,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 2/7] ARM: dts: sun8i: v3s: add DMA properties to
 peripherals supporting DMA

On Fri, 14 May 2021 01:30:19 +0200
Tobias Schramm <t.schramm@...jaro.org> wrote:

> This commit adds DMA properties to all peripherals supporting DMA on the
> Allwinner V3s, enabling accelerated data transfer to them.
> 
> Signed-off-by: Tobias Schramm <t.schramm@...jaro.org>

DMA channels match the manual.

Reviewed-by: Andre Przywara <andre.przywara@....com>

Cheers,
Andre

> ---
>  arch/arm/boot/dts/sun8i-v3s.dtsi | 10 ++++++++++
>  1 file changed, 10 insertions(+)
> 
> diff --git a/arch/arm/boot/dts/sun8i-v3s.dtsi b/arch/arm/boot/dts/sun8i-v3s.dtsi
> index f0296ab46137..3eaa8703e2ac 100644
> --- a/arch/arm/boot/dts/sun8i-v3s.dtsi
> +++ b/arch/arm/boot/dts/sun8i-v3s.dtsi
> @@ -285,6 +285,8 @@ crypto@...5000 {
>  			interrupts = <GIC_SPI 80 IRQ_TYPE_LEVEL_HIGH>;
>  			clocks = <&ccu CLK_BUS_CE>, <&ccu CLK_CE>;
>  			clock-names = "ahb", "mod";
> +			dmas = <&dma 16>, <&dma 16>;
> +			dma-names = "rx", "tx";
>  			resets = <&ccu RST_BUS_CE>;
>  			reset-names = "ahb";
>  		};
> @@ -446,6 +448,8 @@ uart0: serial@...8000 {
>  			reg-shift = <2>;
>  			reg-io-width = <4>;
>  			clocks = <&ccu CLK_BUS_UART0>;
> +			dmas = <&dma 6>, <&dma 6>;
> +			dma-names = "rx", "tx";
>  			resets = <&ccu RST_BUS_UART0>;
>  			status = "disabled";
>  		};
> @@ -457,6 +461,8 @@ uart1: serial@...8400 {
>  			reg-shift = <2>;
>  			reg-io-width = <4>;
>  			clocks = <&ccu CLK_BUS_UART1>;
> +			dmas = <&dma 7>, <&dma 7>;
> +			dma-names = "rx", "tx";
>  			resets = <&ccu RST_BUS_UART1>;
>  			status = "disabled";
>  		};
> @@ -468,6 +474,8 @@ uart2: serial@...8800 {
>  			reg-shift = <2>;
>  			reg-io-width = <4>;
>  			clocks = <&ccu CLK_BUS_UART2>;
> +			dmas = <&dma 8>, <&dma 8>;
> +			dma-names = "rx", "tx";
>  			resets = <&ccu RST_BUS_UART2>;
>  			pinctrl-0 = <&uart2_pins>;
>  			pinctrl-names = "default";
> @@ -547,6 +555,8 @@ spi0: spi@...8000 {
>  			interrupts = <GIC_SPI 65 IRQ_TYPE_LEVEL_HIGH>;
>  			clocks = <&ccu CLK_BUS_SPI0>, <&ccu CLK_SPI0>;
>  			clock-names = "ahb", "mod";
> +			dmas = <&dma 23>, <&dma 23>;
> +			dma-names = "rx", "tx";
>  			pinctrl-names = "default";
>  			pinctrl-0 = <&spi0_pins>;
>  			resets = <&ccu RST_BUS_SPI0>;