linux-kernel - Re: [PATCH 2/5] dt-bindings: perf: stm32: ddrperfm support

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Message-ID: <20190502205124.GA17384@bogus>
Date:   Thu, 2 May 2019 15:51:24 -0500
From:   Rob Herring <robh@...nel.org>
To:     Gerald BAEZA <gerald.baeza@...com>
Cc:     "will.deacon@....com" <will.deacon@....com>,
        "mark.rutland@....com" <mark.rutland@....com>,
        "mcoquelin.stm32@...il.com" <mcoquelin.stm32@...il.com>,
        Alexandre TORGUE <alexandre.torgue@...com>,
        "corbet@....net" <corbet@....net>,
        "linux@...linux.org.uk" <linux@...linux.org.uk>,
        "olof@...om.net" <olof@...om.net>,
        "horms+renesas@...ge.net.au" <horms+renesas@...ge.net.au>,
        "arnd@...db.de" <arnd@...db.de>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-stm32@...md-mailman.stormreply.com" 
        <linux-stm32@...md-mailman.stormreply.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>
Subject: Re: [PATCH 2/5] dt-bindings: perf: stm32: ddrperfm support

On Mon, Apr 29, 2019 at 10:03:37AM +0000, Gerald BAEZA wrote:
> The DDRPERFM is the DDR Performance Monitor embedded in STM32MP1 SOC.
> 
> This documentation indicates how to enable stm32-ddr-pmu driver on
> DDRPERFM peripheral, via the device tree.
> 
> Signed-off-by: Gerald Baeza <gerald.baeza@...com>
> ---
>  .../devicetree/bindings/perf/stm32-ddr-pmu.txt         | 18 ++++++++++++++++++
>  1 file changed, 18 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/perf/stm32-ddr-pmu.txt
> 
> diff --git a/Documentation/devicetree/bindings/perf/stm32-ddr-pmu.txt b/Documentation/devicetree/bindings/perf/stm32-ddr-pmu.txt
> new file mode 100644
> index 0000000..dabc4c7
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/perf/stm32-ddr-pmu.txt
> @@ -0,0 +1,18 @@
> +* STM32 DDR Performance Monitor (DDRPERFM)
> +
> +Required properties:
> +- compatible: must be "st,stm32-ddr-pmu".
> +- reg: physical address and length of the registers set.
> +- clocks: list of phandles and specifiers to all input clocks listed in
> +	  clock-names property.
> +- clock-names: "bus" corresponds to the DDRPERFM bus clock and "ddr" to
> +	       the DDR frequency.

You have 'resets' in the dts.

> +
> +Example:
> +	ddrperfm: perf@...07000 {
> +		compatible = "st,stm32-ddr-pmu";
> +		reg = <0x5a007000 0x400>;
> +		clocks = <&rcc DDRPERFM>, <&rcc PLL2_R>;
> +		clock-names = "bus", "ddr";
> +	};
> +
> -- 
> 2.7.4