linux-kernel - Re: [PATCH] ARM: dts: qcom: msm8974: Add BAM DMUX Ethernet/IP device

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Message-ID: <YoU1h9uUo+0Q4Ecq@gerhold.net>
Date:   Wed, 18 May 2022 20:05:59 +0200
From:   Stephan Gerhold <stephan@...hold.net>
To:     Luca Weiss <luca@...tu.xyz>
Cc:     linux-arm-msm@...r.kernel.org,
        ~postmarketos/upstreaming@...ts.sr.ht, phone-devel@...r.kernel.org,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ARM: dts: qcom: msm8974: Add BAM DMUX Ethernet/IP device

On Tue, May 17, 2022 at 10:34:51PM +0200, Luca Weiss wrote:
> BAM DMUX is used as the network interface to the modem.
> 
> Signed-off-by: Luca Weiss <luca@...tu.xyz>

Thanks for sending this patch!

Reviewed-by: Stephan Gerhold <stephan@...hold.net>

> ---
>  arch/arm/boot/dts/qcom-msm8974.dtsi | 26 ++++++++++++++++++++++++++
>  1 file changed, 26 insertions(+)
> 
> diff --git a/arch/arm/boot/dts/qcom-msm8974.dtsi b/arch/arm/boot/dts/qcom-msm8974.dtsi
> index 814ad0b46232..ffa6f874917a 100644
> --- a/arch/arm/boot/dts/qcom-msm8974.dtsi
> +++ b/arch/arm/boot/dts/qcom-msm8974.dtsi
> @@ -1146,6 +1146,18 @@ spmi_bus: spmi@...cf000 {
>  			#interrupt-cells = <4>;
>  		};
>  
> +		bam_dmux_dma: dma-controller@...34000 {
> +			compatible = "qcom,bam-v1.4.0";
> +			reg = <0xfc834000 0x7000>;
> +			interrupts = <GIC_SPI 29 IRQ_TYPE_LEVEL_HIGH>;
> +			#dma-cells = <1>;
> +			qcom,ee = <0>;
> +
> +			num-channels = <6>;
> +			qcom,num-ees = <1>;
> +			qcom,powered-remotely;
> +		};
> +
>  		remoteproc_mss: remoteproc@...80000 {
>  			compatible = "qcom,msm8974-mss-pil";
>  			reg = <0xfc880000 0x100>, <0xfc820000 0x020>;
> @@ -1180,6 +1192,20 @@ mpss {
>  				memory-region = <&mpss_region>;
>  			};
>  
> +			bam_dmux: bam-dmux {
> +				compatible = "qcom,bam-dmux";
> +
> +				interrupt-parent = <&modem_smsm>;
> +				interrupts = <1 IRQ_TYPE_EDGE_BOTH>, <11 IRQ_TYPE_EDGE_BOTH>;
> +				interrupt-names = "pc", "pc-ack";
> +
> +				qcom,smem-states = <&apps_smsm 1>, <&apps_smsm 11>;
> +				qcom,smem-state-names = "pc", "pc-ack";
> +
> +				dmas = <&bam_dmux_dma 4>, <&bam_dmux_dma 5>;
> +				dma-names = "tx", "rx";
> +			};
> +
>  			smd-edge {
>  				interrupts = <GIC_SPI 25 IRQ_TYPE_EDGE_RISING>;
>  
> -- 
> 2.36.0
>