linux-kernel - Re: [PATCH v3 3/3] arm64: dts: qcom: Specify dload address for msm8916 and msm8996

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Message-ID: <6a652887-5075-d406-2b9e-ebb77edeeb31@codeaurora.org>
Date:   Wed, 9 Aug 2017 14:50:27 -0700
From:   Stephen Boyd <sboyd@...eaurora.org>
To:     Bjorn Andersson <bjorn.andersson@...aro.org>,
        Andy Gross <andy.gross@...aro.org>,
        David Brown <david.brown@...aro.org>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        linux-soc@...r.kernel.org
Subject: Re: [PATCH v3 3/3] arm64: dts: qcom: Specify dload address for
 msm8916 and msm8996

On 08/09/2017 01:10 PM, Bjorn Andersson wrote:
> On msm8916 and msm8996 boards a secure io-write is used to write the
> magic for selecting "download mode", specify this address in the
> DeviceTree.
>
> Note that qcom_scm.download_mode=1 must be specified on the kernel
> command line for the kernel to attempt selecting download mode.
>
> Signed-off-by: Bjorn Andersson <bjorn.andersson@...aro.org>
> ---
>  arch/arm64/boot/dts/qcom/msm8916.dtsi | 2 ++
>  arch/arm64/boot/dts/qcom/msm8996.dtsi | 7 +++++++
>  2 files changed, 9 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/qcom/msm8916.dtsi b/arch/arm64/boot/dts/qcom/msm8916.dtsi
> index 039991f80831..b7197f2e7209 100644
> --- a/arch/arm64/boot/dts/qcom/msm8916.dtsi
> +++ b/arch/arm64/boot/dts/qcom/msm8916.dtsi
> @@ -241,6 +241,8 @@
>  			clocks = <&gcc GCC_CRYPTO_CLK>, <&gcc GCC_CRYPTO_AXI_CLK>, <&gcc GCC_CRYPTO_AHB_CLK>;
>  			clock-names = "core", "bus", "iface";
>  			#reset-cells = <1>;
> +
> +			qcom,dload-mode = <&tcsr>;
>  		};
>  	};
>  
> diff --git a/arch/arm64/boot/dts/qcom/msm8996.dtsi b/arch/arm64/boot/dts/qcom/msm8996.dtsi
> index 8f085716e258..2eee6a33f22b 100644
> --- a/arch/arm64/boot/dts/qcom/msm8996.dtsi
> +++ b/arch/arm64/boot/dts/qcom/msm8996.dtsi
> @@ -261,6 +261,8 @@
>  	firmware {
>  		scm {
>  			compatible = "qcom,scm-msm8996";
> +
> +			qcom,dload-mode = <&tcsr>;

We don't need an offset into tcsr?

>  		};
>  	};
>  
> @@ -287,6 +289,11 @@
>  			reg = <0x740000 0x20000>;
>  		};
>  
> +		tcsr: syscon@...7000 {

This doesn't match reg property.

> +			compatible = "qcom,tcsr-msm8996", "syscon";
> +			reg = <0x7a0000 0x18000>;
> +		};
> +
>  		intc: interrupt-controller@...0000 {
>  			compatible = "arm,gic-v3";
>  			#interrupt-cells = <3>;


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