linux-kernel - Re: [PATCH v2 5/5] arm64: dts: allwinner: a64: Add hwspinlock node

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Message-ID: <20230215205056.5aac7550@slackpad.lan>
Date:   Wed, 15 Feb 2023 20:50:56 +0000
From:   Andre Przywara <andre.przywara@....com>
To:     Bastian Germann <bage@...ian.org>
Cc:     Wilken Gottwalt <wilken.gottwalt@...teo.net>,
        Ohad Ben-Cohen <ohad@...ery.com>,
        Bjorn Andersson <andersson@...nel.org>,
        Baolin Wang <baolin.wang@...ux.alibaba.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Chen-Yu Tsai <wens@...e.org>,
        Samuel Holland <samuel@...lland.org>,
        linux-remoteproc@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-sunxi@...ts.linux.dev,
        devicetree@...r.kernel.org
Subject: Re: [PATCH v2 5/5] arm64: dts: allwinner: a64: Add hwspinlock node

On Wed, 15 Feb 2023 21:37:10 +0100
Bastian Germann <bage@...ian.org> wrote:

Hi,

> Add the hwspinlock to A64 which is already implemented for A31.
> 
> Signed-off-by: Bastian Germann <bage@...ian.org>

This looks alright to me, but there is still the debate what to do with
the names properties. So holding any tags back until this is resolved.

Cheers,
Andre

> ---
>  arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi | 11 +++++++++++
>  1 file changed, 11 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi b/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi
> index 77b5349f6087..f2ecc21f06ed 100644
> --- a/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi
> +++ b/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi
> @@ -851,6 +851,17 @@ wdt0: watchdog@...0ca0 {
>  			clocks = <&osc24M>;
>  		};
>  
> +		hwspinlock: hwlock@...8000 {
> +			compatible = "allwinner,sun50i-a64-hwspinlock",
> +				     "allwinner,sun6i-a31-hwspinlock";
> +			reg = <0x01c18000 0x1000>;
> +			clocks = <&ccu CLK_BUS_SPINLOCK>;
> +			clock-names = "ahb";
> +			resets = <&ccu RST_BUS_SPINLOCK>;
> +			reset-names = "ahb";
> +			#hwlock-cells = <1>;
> +		};
> +
>  		spdif: spdif@...1000 {
>  			#sound-dai-cells = <0>;
>  			compatible = "allwinner,sun50i-a64-spdif",