[PATCH v3 0/2] arm: remove cpu_efficiency
From: dietmar.eggemann@arm.com (Dietmar Eggemann)
Date: 2017-10-24 14:31:59
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From: dietmar.eggemann@arm.com (Dietmar Eggemann)
Date: 2017-10-24 14:31:59
Also in:
lkml
Hi Russel, Thanks for the review! On 24/10/17 11:52, Russell King - ARM Linux wrote:
On Tue, Oct 24, 2017 at 11:27:16AM +0100, Dietmar Eggemann wrote:quoted
With the dt related patches for exynos and renesas now in the appropriated for-next branches for v4.15 there are no Cortex-A15/A7 arm big.LITTLE systems left relying on the 'cpu_efficiency/clock-frequency dt property' based solution anymore.This is way too early to remove support for something that has been in place since 2012. As you've just shown, people are using it with DT files today. We don't know how long people will persist using older files, and we don't know whether there are DT files out in the wild that we don't know about.
Understood. But do we really care about out of tree dt files? In case the mentioned exynos and renesas Cortex-A15/A7 platforms change to using 'capacity-dmips-mhz' in v4.15 there shouldn't be any Cortex-A15/A7 platforms in mainline left using the cpu_efficiency solution anymore.
Our general rule is that we maintain compatibility for older DT.
OK.
NAK.
Then I still send out [2/2] separately.