From mboxrd@z Thu Jan 1 00:00:00 1970 From: jason@lakedaemon.net (Jason Cooper) Date: Wed, 16 Jul 2014 08:55:27 -0400 Subject: [PATCHv3 4/7] ARM: mvebu: update Armada XP DT for dynamic frequency scaling In-Reply-To: <1404920715-19834-5-git-send-email-thomas.petazzoni@free-electrons.com> References: <1404920715-19834-1-git-send-email-thomas.petazzoni@free-electrons.com> <1404920715-19834-5-git-send-email-thomas.petazzoni@free-electrons.com> Message-ID: <20140716125527.GY13108@titan.lakedaemon.net> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Wed, Jul 09, 2014 at 05:45:12PM +0200, Thomas Petazzoni wrote: > In order to support dynamic frequency scaling: > > * the cpuclk Device Tree node needs to be updated to describe a > second set of registers describing the PMU DFS registers. > > * the clock-latency property of the CPUs must be filled, otherwise > the ondemand and conservative cpufreq governors refuse to work. The > latency is high because the cost of a frequency transition is quite > high on those CPUs. > > Signed-off-by: Thomas Petazzoni > --- > arch/arm/boot/dts/armada-xp-mv78230.dtsi | 2 ++ > arch/arm/boot/dts/armada-xp-mv78260.dtsi | 2 ++ > arch/arm/boot/dts/armada-xp-mv78460.dtsi | 4 ++++ > arch/arm/boot/dts/armada-xp.dtsi | 2 +- > 4 files changed, 9 insertions(+), 1 deletion(-) Applied to mvebu/dt thx, Jason.