linux-kernel - Re: [PATCH v4 4/5] arm64: add support for ACPI Low Power Idle(LPI)

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Message-ID: <57334A75.10207@arm.com>
Date:	Wed, 11 May 2016 16:06:29 +0100
From:	Sudeep Holla <sudeep.holla@....com>
To:	"Rafael J. Wysocki" <rjw@...ysocki.net>
Cc:	Sudeep Holla <sudeep.holla@....com>, linux-acpi@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
	Al Stone <al.stone@...aro.org>,
	Prashanth Prakash <pprakash@...eaurora.org>,
	Ashwin Chaugule <ashwin.chaugule@...aro.org>,
	Mark Rutland <mark.rutland@....com>
Subject: Re: [PATCH v4 4/5] arm64: add support for ACPI Low Power Idle(LPI)



On 11/05/16 01:07, Rafael J. Wysocki wrote:
> On Tuesday, April 19, 2016 01:30:12 PM Sudeep Holla wrote:
>> This patch adds appropriate callbacks to support ACPI Low Power Idle
>> (LPI) on ARM64.
>>
>> It also selects ARCH_SUPPORTS_ACPI_PROCESSOR_LPI if ACPI is enabled
>> on ARM64.
>
> Can you remind me why we need the ARCH_SUPPORTS_ACPI_PROCESSOR_LPI thing in
> addition to the previously defined ARCH_SUPPORTS_ACPI_PROCESSOR_CSTATE?
>

That's stupid of me, I removed it from the driver in v4 but the few
remnants of it stayed by mistake(mainly in this patch alone)

> I thought supporting LPI would not require an arch Kconfig option.
>

That's correct.

-- 
Regards,
Sudeep