linux-kernel - Re: [PATCH 1/4] ARM: DT: apq8064: add rpm support

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Date:	Mon, 29 Sep 2014 15:17:57 -0700
From:	Stephen Boyd <sboyd@...eaurora.org>
To:	Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
	Kumar Gala <galak@...eaurora.org>, devicetree@...r.kernel.org
CC:	broonie@...nel.org, lee.jones@...aro.org,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Russell King <linux@....linux.org.uk>,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	arm@...nel.org, linux-arm-msm@...r.kernel.org,
	bjorn.andersson@...ymobile.com
Subject: Re: [PATCH 1/4] ARM: DT: apq8064: add rpm support

On 09/29/14 02:14, Srinivas Kandagatla wrote:
> @@ -246,6 +247,24 @@
>  			#reset-cells = <1>;
>  		};
>  
> +		apcs: syscon@...1000 {
> +			compatible = "syscon";
> +			reg = <0x2011000 0x1000>;
> +		};

This is actually a clock controller block that hw designers decided was
good place to shove the ipc bits (because there's room!). Can we call it

                l2cc: clock-controller@...1000 {
                        compatible = "syscon";
                        reg = <0x2011000 0x1000>;
                };

Eventually I'll add the specific krait compatible when we merge krait
clock support:

                l2cc: clock-controller@...1000 {
                        compatible = "qcom,kpss-gcc", "syscon";
                        reg = <0x2011000 0x1000>;
                        clock-output-names = "acpu_l2_aux";
                };

> +
> +		rpm@...000 {
> +			compatible	= "qcom,rpm-apq8064";
> +			reg		= <0x108000 0x1000>;
> +			qcom,ipc = <&apcs 0x8 2>;

There are actually 3 ipc bits. I guess if we ever have to use the other
two we'll extend this binding to have the other bits specified some
other way?

-- 
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
hosted by The Linux Foundation

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