linux-kernel - Re: [PATCH 0/3] ARM: dts: sun6i: Enable cpufreq support for A31/A31s

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Date:	Wed, 25 Mar 2015 15:07:46 -0700
From:	Maxime Ripard <maxime.ripard@...e-electrons.com>
To:	Chen-Yu Tsai <wens@...e.org>
Cc:	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	linux-sunxi@...glegroups.com, Hans de Goede <hdegoede@...hat.com>,
	Marcus Cooper <codekipper@...il.com>
Subject: Re: [PATCH 0/3] ARM: dts: sun6i: Enable cpufreq support for A31/A31s

On Thu, Mar 26, 2015 at 05:04:46AM +0800, Chen-Yu Tsai wrote:
> Hi everyone,
> 
> This series adds the DT parts of cpufreq support, clock references, thermal
> zones and OPPs, for sun6i. This is based on sunxi/for-next (6bcf44d5edfb).
> Required (sun4i-ts) driver support is already in v4.0-rc1.
> 
> Patch 1 moves the ahb1 assigned-clocks reparenting properties from the dma
> controller node to the ahb1 clock node. This matches what we've done for
> sun5i and sun7i. The purpose of this is to clock ahb1 from a stable clock
> as soon as possible, to prevent hrtimer miscalculation/instability.
> 
> Patch 2 adds the clock reference and OPPs for the cpu cluster.
> 
> Patch 3 adds the thermal zones for CPU passive (cpufreq limiting) cooling.
> 
> I've tested this on my Sinlinx SinA31s (not yet mainlined). The highest
> OPP matches the default CPU clock/voltage setting found in mainline
> u-boot. However the Mele I7 fex file specifies a slightly higher voltage
> for 1008 MHz. If the default setting is not stable enough for the Mele
> I7, it should be overridden in the board dts file.
> 
> This series does not cover A31/A31s revision D, which seems to have lower
> voltage requirements. At the moment no one has seen them.

Applied all three, thanks!
Maxime

-- 
Maxime Ripard, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com

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