linux-kernel - Re: [PATCH v3 2/2] arm64: dts: add sp804 timer node for Hi3660

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Message-ID: <5942E77A.8080500@hisilicon.com>
Date:   Thu, 15 Jun 2017 21:00:58 +0100
From:   Wei Xu <xuwei5@...ilicon.com>
To:     Leo Yan <leo.yan@...aro.org>, Rob Herring <robh+dt@...nel.org>,
        "Mark Rutland" <mark.rutland@....com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will.deacon@....com>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...eaurora.org>,
        Zhangfei Gao <zhangfei.gao@...aro.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-clk@...r.kernel.org>, Guodong Xu <guodong.xu@...aro.org>,
        "Haojian Zhuang" <haojian.zhuang@...aro.org>
Subject: Re: [PATCH v3 2/2] arm64: dts: add sp804 timer node for Hi3660

Hi Leo,

On 2017/5/22 5:52, Leo Yan wrote:
> The Hi3660 SoC comes with the sp804 timer in addition to the
> architecture timers. These ones are shutdown when reaching a deep idle
> states and a backup timer is needed. The sp804 belongs to another power
> domain and can fulfill the purpose of replacing temporarily an
> architecture timer when the CPU is idle.
> 
> Describe it in the device tree, so it can be enabled at boot time.
> 
> Suggested-by: Daniel Lezcano <daniel.lezcano@...aro.org>
> Acked-by: Daniel Lezcano <daniel.lezcano@...aro.org>
> Signed-off-by: Leo Yan <leo.yan@...aro.org>
> ---
>  arch/arm64/boot/dts/hisilicon/hi3660.dtsi | 11 +++++++++++
>  1 file changed, 11 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/hisilicon/hi3660.dtsi b/arch/arm64/boot/dts/hisilicon/hi3660.dtsi
> index 138fcba..f75c792 100644
> --- a/arch/arm64/boot/dts/hisilicon/hi3660.dtsi
> +++ b/arch/arm64/boot/dts/hisilicon/hi3660.dtsi
> @@ -173,6 +173,17 @@
>  			#clock-cells = <1>;
>  		};
>  
> +		dual_timer0: timer@...14000 {
> +			compatible = "arm,sp804", "arm,primecell";
> +			reg = <0x0 0xfff14000 0x0 0x1000>;
> +			interrupts = <GIC_SPI 48 IRQ_TYPE_LEVEL_HIGH>,
> +				     <GIC_SPI 49 IRQ_TYPE_LEVEL_HIGH>;
> +			clocks = <&crg_ctrl HI3660_OSC32K>,
> +				 <&crg_ctrl HI3660_OSC32K>,
> +				 <&crg_ctrl HI3660_OSC32K>;
> +			clock-names = "timer1", "timer2", "apb_pclk";
> +		};
> +
>  		ufs: ufs@...b0000 {
>  			compatible = "jedec,ufs-1.1", "hisilicon,hi3660-ufs";
>  			reg = <0x0 0xff3b0000 0x0 0x1000>, /* 0: HCI standard */
> 

Since the dts part is not depended on the driver and Guodong has put this into another
patch set[1], I will pick up that one.
Thanks!

[1]: https://lkml.org/lkml/2017/6/14/1049

BR,
Wei