Re: [PATCH v4 5/6] MIPS: CI20: Modify DTS to support high resolution timer for SMP.

[Paul Cercueil <paul@crapouillou.net>]

Hi Zhou,

I think you can move this patch before the clocksource one - it will 
work with the old clocksource code and in generally it's a good idea to 
ensure (if possible) that you can git-bisect without ending up with a 
broken kernel.

-Paul


Le sam., févr. 15, 2020 at 02:02, 周琰杰 (Zhou Yanjie) 
<zhouyanjie@wanyeetech.com> a écrit :
> Modify DTS, change tcu channel from 2 to 3, channel #0 and #1 for
> per core local timer, #2 for clocksource.
> 
> Tested-by: H. Nikolaus Schaller <hns@goldelico.com>
> Tested-by: Paul Boddie <paul@boddie.org.uk>
> Signed-off-by: 周琰杰 (Zhou Yanjie) <zhouyanjie@wanyeetech.com>
> ---
> 
> Notes:
>     v1->v2:
>     No change.
> 
>     v2->v3:
>     No change.
> 
>     v3->v4:
>     Rebase on top of kernel 5.6-rc1.
> 
>  arch/mips/boot/dts/ingenic/ci20.dts | 11 +++++++++--
>  1 file changed, 9 insertions(+), 2 deletions(-)
> 
> diff --git a/arch/mips/boot/dts/ingenic/ci20.dts 
> b/arch/mips/boot/dts/ingenic/ci20.dts
> index 37b9316..98c4c42 100644
> --- a/arch/mips/boot/dts/ingenic/ci20.dts
> +++ b/arch/mips/boot/dts/ingenic/ci20.dts
> @@ -456,6 +456,13 @@
> 
>  &tcu {
>  	/* 3 MHz for the system timer and clocksource */
> -	assigned-clocks = <&tcu TCU_CLK_TIMER0>, <&tcu TCU_CLK_TIMER1>;
> -	assigned-clock-rates = <3000000>, <3000000>;
> +	assigned-clocks = <&tcu TCU_CLK_TIMER0>, <&tcu TCU_CLK_TIMER1>,
> +					  <&tcu TCU_CLK_TIMER2>;
> +	assigned-clock-rates = <3000000>, <3000000>, <750000>;
> +
> +	/*
> +	 * Use channel #0 and #1 for the per core system timer,
> +	 * and use channel #2 for the clocksource.
> +	 */
> +	ingenic,pwm-channels-mask = <0xF8>;
>  };
> --
> 2.7.4
>