linux-kernel - Re: [PATCH] ARM: dts: msm8974-FP2: add reboot-mode node

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Message-ID: <20190713143104.GA11154@onstation.org>
Date:   Sat, 13 Jul 2019 10:31:04 -0400
From:   Brian Masney <masneyb@...tation.org>
To:     Luca Weiss <luca@...tu.xyz>
Cc:     linux-arm-msm@...r.kernel.org,
        ~martijnbraam/pmos-upstream@...ts.sr.ht,
        Andy Gross <agross@...nel.org>,
        David Brown <david.brown@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ARM: dts: msm8974-FP2: add reboot-mode node

On Sat, Jul 13, 2019 at 01:26:45PM +0200, Luca Weiss wrote:
> Hi Brian,
> how about something like that (formatting is surely broken because I'm not 
> sending this with git-send-email^^)?
> 
> I'd says this should be work fine with all devices as all modes are defined in 
> the device-specific dts but the reg and offset values are in the board dts. 
> Should I also add a status = "disabled" to the reboot-mode node in the board 
> dts?
> 
> diff --git a/arch/arm/boot/dts/qcom-msm8974-fairphone-fp2.dts b/arch/arm/boot/
> dts/qcom-msm8974-fairphone-fp2.dts
> index 643c57f84818..ff4a3e0aa746 100644
> --- a/arch/arm/boot/dts/qcom-msm8974-fairphone-fp2.dts
> +++ b/arch/arm/boot/dts/qcom-msm8974-fairphone-fp2.dts
> @@ -338,6 +338,16 @@
>  			};
>  		};
>  	};
> +
> +	imem@...05000 {
> +		status = "okay";
> +
> +		reboot-mode {
> +			mode-normal	= <0x77665501>;
> +			mode-bootloader	= <0x77665500>;
> +			mode-recovery	= <0x77665502>;
> +		};
> +	};
>  };
>  
>  &spmi_bus {
> diff --git a/arch/arm/boot/dts/qcom-msm8974.dtsi b/arch/arm/boot/dts/qcom-
> msm8974.dtsi
> index 45b5c8ef0374..1927430bded7 100644
> --- a/arch/arm/boot/dts/qcom-msm8974.dtsi
> +++ b/arch/arm/boot/dts/qcom-msm8974.dtsi
> @@ -1085,6 +1085,17 @@
>  				};
>  			};
>  		};
> +
> +		imem@...05000 {
> +			status = "disabled";
> +			compatible = "syscon", "simple-mfd";
> +			reg = <0xfe805000 0x1000>;
> +
> +			reboot-mode {
> +				compatible = "syscon-reboot-mode";
> +				offset = <0x65c>;
> +			};
> +		};
>  	};
>  
>  	smd {

I think this sounds reasonable. 

Reviewed-by: Brian Masney <masneyb@...tation.org>

You should resend this out with git send-email and see what Bjorn says.

Brian