[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <20150819054120.GA3258@linux>
Date: Wed, 19 Aug 2015 11:11:20 +0530
From: Viresh Kumar <viresh.kumar@...aro.org>
To: Pi-Cheng Chen <pi-cheng.chen@...aro.org>
Cc: "Rafael J. Wysocki" <rjw@...ysocki.net>,
Matthias Brugger <matthias.bgg@...il.com>,
Mark Rutland <mark.rutland@....com>,
Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
Michael Turquette <mturquette@...libre.com>,
devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org,
linaro-kernel@...ts.linaro.org, linux-mediatek@...ts.infradead.org
Subject: Re: [PATCH v7 2/3] cpufreq: mediatek: Add MT8173 cpufreq driver
On 19-08-15, 10:05, Pi-Cheng Chen wrote:
> Mediatek MT8173 is an ARMv8 based quad-core (2*Cortex-A53 and
> 2*Cortex-A72) SoC with duall clusters. For each cluster, two voltage
> inputs, Vproc and Vsram are supplied by two regulators. For the big
> cluster, two regulators come from different PMICs. In this case, when
> scaling voltage inputs of the cluster, the voltages of two regulator
> inputs need to be controlled by software explicitly under the SoC
> specific limitation:
>
> 100mV < Vsram - Vproc < 200mV
>
> which is called 'voltage tracking' mechanism. And when scaling the
> frequency of cluster clock input, the input MUX need to be parented to
> another "intermediate" stable PLL first and reparented to the original
> PLL once the original PLL is stable at the target frequency. This patch
> implements those mechanisms to enable CPU DVFS support for Mediatek
> MT8173 SoC.
>
> Signed-off-by: Pi-Cheng Chen <pi-cheng.chen@...aro.org>
> Acked-by: Viresh Kumar <viresh.kumar@...aro.org>
> ---
>
> Changes in v7:
> - add of_machine_is_compatible() check to be multiplatform friendly
Looks fine, thanks.
--
viresh
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists