From: Daniel Lezcano <daniel.lezcano@linaro.org>
To: Rob Herring <robherring2@gmail.com>
Cc: rjw@sisk.pl, patches@linaro.org,
linux-arm-kernel@lists.infradead.org,
linaro-kernel@lists.linaro.org, linux-pm@vger.kernel.org
Subject: Re: [PATCH 2/2] cpuidle / calxeda: remove redundant Kconfig option
Date: Tue, 19 Mar 2013 23:03:20 +0100 [thread overview]
Message-ID: <5148E0A8.70208@linaro.org> (raw)
In-Reply-To: <514880AF.7010404@gmail.com>
On 03/19/2013 04:13 PM, Rob Herring wrote:
> On 03/19/2013 09:35 AM, Daniel Lezcano wrote:
>> On 03/19/2013 01:22 PM, Rob Herring wrote:
>>> On 03/12/2013 04:27 AM, Daniel Lezcano wrote:
>>>> When the CPU_IDLE and the ARCH_HIGHBANK options are set it is
>>>> pointless to define a new option CPU_IDLE_CALXEDA because it
>>>> is redundant.
>>>>
>>>> The Makefile drivers directory contains a condition to compile
>>>> the cpuidle drivers:
>>>>
>>>> obj-$(CONFIG_CPU_IDLE) += cpuidle/
>>>>
>>>> Hence, if CPU_IDLE is not set we won't enter this directory.
>>>>
>>>> This patch removes the useless Kconfig option and replaces the
>>>> condition in the Makefile by CONFIG_ARCH_HIGHBANK.
>>>
>>> If I have multiple platforms including highbank compiled in, but want to
>>> disable cpuidle just for highbank, then you can't disable it at compile
>>> time.
>>
>> Could you elaborate a bit ? Is it today possible to have multiple
>> platforms in a single kernel ?
>
> You've heard of single zImage, right? Vexpress, mvebu, highbank, imx,
> omap2+, socfpga, vt8500 off the top of my head as of 3.8.
Yes, I have heard of single zImage but I am not aware of the status.
IIUC, the approach would be the same as cpufreq, right ?
I am not sure the cpuidle drivers are ready for that.
We can keep the current Makefile but I am in favor of removing this
Kconfig option for now, unify as much as possible all the drivers,
create a common driver for all and then address the single zImage for
all these drivers at the same time.
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next prev parent reply other threads:[~2013-03-19 22:03 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-03-12 9:27 [PATCH 1/2] cpuidle / kirkwood: remove redundant Kconfig option Daniel Lezcano
2013-03-12 9:27 ` [PATCH 2/2] cpuidle / calxeda: " Daniel Lezcano
2013-03-19 11:49 ` Daniel Lezcano
2013-03-19 12:22 ` Rob Herring
2013-03-19 14:35 ` Daniel Lezcano
2013-03-19 15:13 ` Rob Herring
2013-03-19 22:03 ` Daniel Lezcano [this message]
2013-03-12 11:22 ` [PATCH 1/2] cpuidle / kirkwood: " Jason Cooper
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