linux-kernel - Re: [PATCH] arm64: dts: mediatek: mt7981: add I2C controller

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Date: Mon, 3 Jun 2024 09:37:41 +0200
From: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
To: Rafał Miłecki <zajec5@...il.com>,
 Matthias Brugger <matthias.bgg@...il.com>, Rob Herring <robh@...nel.org>,
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
 Conor Dooley <conor+dt@...nel.org>
Cc: devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
 linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org,
 Rafał Miłecki <rafal@...ecki.pl>
Subject: Re: [PATCH] arm64: dts: mediatek: mt7981: add I2C controller

Il 05/04/24 14:55, Rafał Miłecki ha scritto:
> From: Rafał Miłecki <rafal@...ecki.pl>
> 
> MT7981 has one on-SoC I2C controller that differs from recent Mediatek
> blocks by having a different SLAVE_ADDR register offset (thus a custom
> binding compatible string).
> 
> Signed-off-by: Rafał Miłecki <rafal@...ecki.pl>
> ---
>   arch/arm64/boot/dts/mediatek/mt7981b.dtsi | 17 +++++++++++++++++
>   1 file changed, 17 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/mediatek/mt7981b.dtsi b/arch/arm64/boot/dts/mediatek/mt7981b.dtsi
> index 8a6263cc569c..2d7f91196e64 100644
> --- a/arch/arm64/boot/dts/mediatek/mt7981b.dtsi
> +++ b/arch/arm64/boot/dts/mediatek/mt7981b.dtsi
> @@ -94,6 +94,23 @@ pwm@...48000 {
>   			#pwm-cells = <2>;
>   		};
>   
> +		i2c@...07000 {
> +			compatible = "mediatek,mt7981-i2c";
> +			reg = <0 0x11007000 0 0x1000>,
> +			      <0 0x10217080 0 0x80>;
> +			interrupts = <GIC_SPI 136 IRQ_TYPE_LEVEL_HIGH>;
> +			clocks = <&infracfg CLK_INFRA_I2C0_CK>,
> +				 <&infracfg CLK_INFRA_AP_DMA_CK>,
> +				 <&infracfg CLK_INFRA_I2C_MCK_CK>,
> +				 <&infracfg CLK_INFRA_I2C_PCK_CK>;
> +			clock-names = "main", "dma", "arb", "pmic";
> +			clock-div = <1>;
> +			clock-frequency = <100000>;

If you need to specify clock-div and clock-frequency, those are board-specific
properties and not soc wide.

Please remove those from there and put them in your board specific DT.

Cheers,
Angelo