linux-kernel - Re: [PATCH 2/3] dt-bindings: amlogic: Add Internal Clock Measurer bindings

Open Source and information security mailing list archives

Date:   Mon, 16 Jul 2018 15:45:16 -0600
From:   Rob Herring <robh@...nel.org>
To:     Neil Armstrong <narmstrong@...libre.com>
Cc:     khilman@...libre.com, devicetree@...r.kernel.org,
        linux-amlogic@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 2/3] dt-bindings: amlogic: Add Internal Clock Measurer
 bindings

On Tue, Jul 03, 2018 at 03:21:49PM +0200, Neil Armstrong wrote:
> The Amlogic Meson GX SoCs embeds a clock measurer IP to measure the internal
> clock paths frequencies.
> 
> Signed-off-by: Neil Armstrong <narmstrong@...libre.com>
> ---
>  .../devicetree/bindings/soc/amlogic/clk-measure.txt       | 15 +++++++++++++++
>  1 file changed, 15 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/soc/amlogic/clk-measure.txt
> 
> diff --git a/Documentation/devicetree/bindings/soc/amlogic/clk-measure.txt b/Documentation/devicetree/bindings/soc/amlogic/clk-measure.txt
> new file mode 100644
> index 0000000..ba9183a
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/soc/amlogic/clk-measure.txt
> @@ -0,0 +1,15 @@
> +Amlogic Internal Clock Measurer
> +===============================
> +
> +The Amlogic SoCs contains an IP to measure the internal clocks.
> +The precision is multiple of MHz, useful to debug the clock states.

What a simple yet useful debug tool.

> +
> +Required properties:
> +- compatible: Shall contain "amlogic,meson-gx-clk-measure"
> +- reg: base address and size of the Clock Measurer register space.
> +
> +Example:
> +	clock-measure@...8 {
> +		compatible = "amlogic,meson-gx-clk-measure";
> +		reg = <0x0 0x8758 0x0 0x10>;

This doesn't really look like its own block though. Can't the parent 
device instantiate the driver for this?

> +	};
> -- 
> 2.7.4
> 
> 
> _______________________________________________
> linux-arm-kernel mailing list
> linux-arm-kernel@...ts.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

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