Thread (6 messages) 6 messages, 2 authors, 2017-11-24

[PATCH v3 0/2] arm: remove cpu_efficiency

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.
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