linux-kernel - Re: [PATCH v3 1/5] clocksource/drivers/timer-mediatek: Add system timer bindings

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Message-ID: <93345c88-f880-5e2e-ae36-cf1b57df9bba@linaro.org>
Date:   Thu, 28 Jun 2018 16:08:12 +0200
From:   Daniel Lezcano <daniel.lezcano@...aro.org>
To:     Stanley Chu <stanley.chu@...iatek.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Rob Herring <robh+dt@...nel.org>
Cc:     linux-kernel@...r.kernel.org, linux-mediatek@...ts.infradead.org,
        devicetree@...r.kernel.org, wsd_upstream@...iatek.com
Subject: Re: [PATCH v3 1/5] clocksource/drivers/timer-mediatek: Add system
 timer bindings

On 28/06/2018 12:45, Stanley Chu wrote:
> This patch fixes bindings of existed "General Purpose Timer",
> and then add bindings of new "System Timer" on Mediatek SoCs.
> 
> Signed-off-by: Stanley Chu <stanley.chu@...iatek.com>
> ---
>  .../bindings/timer/mediatek,mtk-timer.txt          |   38 ++++++++++++++++----
>  1 file changed, 32 insertions(+), 6 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/timer/mediatek,mtk-timer.txt b/Documentation/devicetree/bindings/timer/mediatek,mtk-timer.txt
> index b1fe7e9..d42247b 100644
> --- a/Documentation/devicetree/bindings/timer/mediatek,mtk-timer.txt
> +++ b/Documentation/devicetree/bindings/timer/mediatek,mtk-timer.txt
> @@ -1,5 +1,14 @@
> -Mediatek MT6577, MT6572 and MT6589 Timers
> ----------------------------------------
> +Mediatek Timers
> +---------------
> +
> +Mediatek SoCs have two different timers on different platforms,
> +- GPT (General Purpose Timer)
> +- SYST (System Timer)
> +
> +Please bind correct timers in each platforms.
> +
> +
> +** General Purpose Timer (GPT)
>  
>  Required properties:
>  - compatible should contain:
> @@ -11,9 +20,8 @@ Required properties:
>  	* "mediatek,mt8135-timer" for MT8135 compatible timers
>  	* "mediatek,mt8173-timer" for MT8173 compatible timers
>  	* "mediatek,mt6577-timer" for MT6577 and all above compatible timers
> -- reg: Should contain location and length for timers register.
> -- clocks: Clocks driving the timer hardware. This list should include two
> -	clocks. The order is system clock and as second clock the RTC clock.
> +- reg: Should contain location and length for GPT register.
> +- clocks: GPT is drived by system clock.
>  
>  Examples:
>  
> @@ -21,5 +29,23 @@ Examples:
>  		compatible = "mediatek,mt6577-timer";
>  		reg = <0x10008000 0x80>;
>  		interrupts = <GIC_SPI 113 IRQ_TYPE_LEVEL_LOW>;
> -		clocks = <&system_clk>, <&rtc_clk>;
> +		clocks = <&system_clk>;
> +	};
> +
> +
> +** System Timer (SYST)
> +
> +Required properties:
> +- compatible: Should contain
> +	* "mediatek,mt6765-systimer" for MT6765 compatible timers
> +- reg: Should contain the location and length for system timer registers.
> +- clocks: System timer is drived by system clock.
> +
> +Examples:
> +
> +	systimer@...17000 {
> +		compatible = "mediatek,mt6765-systimer";

why not "mediatek,mt6765-timer" ? for consistency.

> +		reg = <0 0x10017000 0 0x1000>;
> +		interrupts = <GIC_SPI 194 IRQ_TYPE_LEVEL_HIGH>;
> +		clocks = <&system_clk>;
>  	};
> 


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