linux-kernel - Re: [RFT PATCH v2 07/14] arm64: dts: qcom: sc7180: split TCSR halt regs out of mutex

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Message-ID: <ddede644-9980-79fa-4632-903f393a3aae@somainline.org>
Date:   Wed, 17 Aug 2022 23:02:20 +0200
From:   Konrad Dybcio <konrad.dybcio@...ainline.org>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Lee Jones <lee@...nel.org>, Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [RFT PATCH v2 07/14] arm64: dts: qcom: sc7180: split TCSR halt
 regs out of mutex



On 17.08.2022 15:03, Krzysztof Kozlowski wrote:
> The TCSR halt regs are next to TCSR mutex, so before converting the TCSR
> mutex into device with address space, we need to split the halt regs to
> its own syscon device.  This also describes more accurately the devices
> and their IO address space.
> 
> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
> ---
Not tested on a device, but looks good to the eye:
Reviewed-by: Konrad Dybcio <konrad.dybcio@...ainline.org>

Konrad
>  arch/arm64/boot/dts/qcom/sc7180.dtsi | 13 +++++++++----
>  1 file changed, 9 insertions(+), 4 deletions(-)
> 
> diff --git a/arch/arm64/boot/dts/qcom/sc7180.dtsi b/arch/arm64/boot/dts/qcom/sc7180.dtsi
> index 49f28cb531f6..5d2dd21da79c 100644
> --- a/arch/arm64/boot/dts/qcom/sc7180.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sc7180.dtsi
> @@ -1464,10 +1464,15 @@ ipa: ipa@...0000 {
>  
>  		tcsr_mutex_regs: syscon@...0000 {
>  			compatible = "syscon";
> -			reg = <0 0x01f40000 0 0x40000>;
> +			reg = <0 0x01f40000 0 0x20000>;
>  		};
>  
> -		tcsr_regs: syscon@...0000 {
> +		tcsr_regs_1: sycon@...0000 {
> +			compatible = "qcom,sc7180-tcsr", "syscon";
> +			reg = <0 0x01f60000 0 0x20000>;
> +		};
> +
> +		tcsr_regs_2: syscon@...0000 {
>  			compatible = "qcom,sc7180-tcsr", "syscon";
>  			reg = <0 0x01fc0000 0 0x40000>;
>  		};
> @@ -1932,8 +1937,8 @@ remoteproc_mpss: remoteproc@...0000 {
>  				 <&pdc_reset PDC_MODEM_SYNC_RESET>;
>  			reset-names = "mss_restart", "pdc_reset";
>  
> -			qcom,halt-regs = <&tcsr_mutex_regs 0x23000 0x25000 0x24000>;
> -			qcom,spare-regs = <&tcsr_regs 0xb3e4>;
> +			qcom,halt-regs = <&tcsr_regs_1 0x3000 0x5000 0x4000>;
> +			qcom,spare-regs = <&tcsr_regs_2 0xb3e4>;
>  
>  			status = "disabled";
>