linux-kernel - Re: [PATCH] arm64: dts: rockchip: update cpu opp table for rk3399 op1

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Date:   Tue, 23 May 2017 10:51:05 +0800
From:   Eddie Cai <eddie.cai.linux@...il.com>
To:     Heiko Stuebner <heiko@...ech.de>
Cc:     Caesar Wang <wxt@...k-chips.com>,
        linux-rockchip@...ts.infradead.org,
        Brian Norris <briannorris@...omium.org>,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        Douglas Anderson <dianders@...omium.org>
Subject: Re: [PATCH] arm64: dts: rockchip: update cpu opp table for rk3399 op1

Hi Heiko

2017-05-22 23:02 GMT+08:00 Heiko Stuebner <heiko@...ech.de>:
> Hi Eddie, Caesar,
>
> Am Montag, 24. April 2017, 18:29:26 CEST schrieb Eddie Cai:
>> Hi Heiko
>>
>> 2017-04-24 17:15 GMT+08:00 Heiko Stübner <heiko@...ech.de>:
>> > Am Montag, 24. April 2017, 16:49:08 CEST schrieb Caesar Wang:
>> >> 在 2017年04月24日 16:26, Heiko Stübner 写道:
>> >> > Hi Caesar,
>> >> >
>> >> > Am Montag, 24. April 2017, 14:18:50 CEST schrieb Caesar Wang:
>> >> >> Update the cpu opp table for rk3399 op1.
>> >> >
>> >> > Ideally this should contain something about the "why".
>> >> > Are these new voltage settings safer to operate under?
>> >>
>> >> The before opp table is for earlier batch of rk3399 SoCs,  that's no
>> >> enough for the current and
>> >> newer batch of rk3399 op1. In order to suit for the rk3399 op1, we need
>> >> to little voltages changed.
>> >
>> > just to make sure, this is also safe for all the non-chromebook rk3399 socs
>> > (like the firefly and tv-boxes, etc), right?
>> This is only for op1. other 3399s should have a different opp table
>
> digging this up, as I'm right now working on a rk3399-firefly, could you
> provide the correct opp tables for the available rk3399 variants please?
>
> I.e. generally safe opps for boards like the firefly and the special ones
> for op1-based devices?
here is for 3399:
https://github.com/rockchip-linux/kernel/blob/release-4.4/arch/arm64/boot/dts/rockchip/rk3399-opp.dtsi
here is for op1:
https://chromium.googlesource.com/chromiumos/third_party/kernel/+/chromeos-4.4/arch/arm64/boot/dts/rockchip/rk3399-opp.dtsi
>
>
> Thanks
> Heiko