linux-kernel - Re: [PATCH v3 1/6] dt-bindings: ap806: add the cluster clock node in the syscon file

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Date:   Mon, 17 Dec 2018 16:50:44 -0600
From:   Rob Herring <robh@...nel.org>
To:     Gregory CLEMENT <gregory.clement@...tlin.com>
Cc:     Stephen Boyd <sboyd@...eaurora.org>,
        Mike Turquette <mturquette@...libre.com>,
        linux-clk@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, Jason Cooper <jason@...edaemon.net>,
        Andrew Lunn <andrew@...n.ch>,
        Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>,
        linux-arm-kernel@...ts.infradead.org,
        Antoine Tenart <antoine.tenart@...tlin.com>,
        Miquèl Raynal <miquel.raynal@...tlin.com>,
        Maxime Chevallier <maxime.chevallier@...tlin.com>
Subject: Re: [PATCH v3 1/6] dt-bindings: ap806: add the cluster clock node in
 the syscon file

On Sun, Dec 16, 2018 at 10:41:42AM +0100, Gregory CLEMENT wrote:
> Document the device tree binding for the cluster clock controllers found
> in the Armada 7K/8K SoCs.
> 
> Signed-off-by: Gregory CLEMENT <gregory.clement@...tlin.com>
> ---
>  .../arm/marvell/ap806-system-controller.txt   | 22 +++++++++++++++++++
>  1 file changed, 22 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/arm/marvell/ap806-system-controller.txt b/Documentation/devicetree/bindings/arm/marvell/ap806-system-controller.txt
> index 3fd21bb7cb37..8f281816a6b8 100644
> --- a/Documentation/devicetree/bindings/arm/marvell/ap806-system-controller.txt
> +++ b/Documentation/devicetree/bindings/arm/marvell/ap806-system-controller.txt
> @@ -136,3 +136,25 @@ ap_syscon1: system-controller@...000 {
>  		#thermal-sensor-cells = <1>;
>  	};
>  };
> +
> +Cluster clocks:
> +---------------
> +
> +Device Tree Clock bindings for cluster clock of AP806 Marvell. Each
> +cluster contain up to 2 CPUs running at the same frequency.
> +
> +Required properties:
> +- compatible: must be  "marvell,ap806-cpu-clock";
> +- #clock-cells : should be set to 1.
> +- clocks : shall be the input parents clock phandle for the clock.
> +
> +ap_syscon1: system-controller@...000 {
> +	compatible = "syscon", "simple-mfd";
> +	reg = <0x6f8000 0x1000>;
> +
> +	cpu_clk: clock-cpu {

There's not a register address range you can use even if Linux happens 
to not need it (currently)?

There's already a clock node under this syscon? Are they really separate 
sub-blocks?

> +		compatible = "marvell,ap806-cpu-clock";
> +		clocks = <&ap_clk 0>, <&ap_clk 1>;
> +		#clock-cells = <1>;
> +	};
> +};
> -- 
> 2.19.2
>