linux-kernel - Re: [PATCH 1/9] clocksource/drivers/rockchip_timer: split bc_timer into rk_timer and rk_clock_event

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Message-Id: <2217A50B-A694-4304-9628-23C4541FED5A@gmail.com>
Date:   Thu, 24 Nov 2016 15:12:15 +0300
From:   Alexander Kochetkov <al.kochet@...il.com>
To:     Heiko Stübner <heiko@...ech.de>
Cc:     daniel.lezcano@...aro.org, tglx@...utronix.de,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-rockchip@...ts.infradead.org
Subject: Re: [PATCH 1/9] clocksource/drivers/rockchip_timer: split bc_timer into rk_timer and rk_clock_event_device

Hello Heiko,

> I haven't looked to deep into your patches yet, but what is missing is the 
> general goal of your whole series.


I will be very grateful to receive feedback

> 24 нояб. 2016 г., в 15:01, Heiko Stübner <heiko@...ech.de> написал(а):
> 
> git format-patch has this nice "--cover-letter" option that creates obviously 
> a cover-letter where you can describe what your series wants to achieve.
> 
I’ve used --cover-letter option but forget to add message text. Just subject.
So all patches was sent without cover letter. I’ll be careful next time.

> For those reading along, I guess what you want to achieve should be what I 
> describe below, so of course no need to resend just for this :-)
> 
> -----
> The clock supplying the arm-global-timer on the rk3188 is coming from the
> the cpu clock itself and thus changes its rate everytime cpufreq adjusts the 
> cpu frequency making this timer unsuitable as a stable clocksource.
> 
> The rk3188, rk3288 and following socs share a separate timer block already 
> handled by the rockchip-timer driver. Therefore adapt this driver to also be 
> able to act as clocksource on rk3188.
> -----
> 
> Right?

Yes, exactly as you wrote.

Regards,
Alexander.