Re: [PATCHv3 4/7] ARM: mvebu: update Armada XP DT for dynamic frequency scaling

Jason Cooper
2014-07-16T12:55:43Z

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 <thomas.petazzoni@free-electrons.com>
> ---
> 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.