From: Russell King - ARM Linux <linux@arm.linux.org.uk>
To: Kukjin Kim <kgene.kim@samsung.com>
Cc: linux-arm-kernel@lists.infradead.org,
linux-samsung-soc@vger.kernel.org,
Sangbeom Kim <sbkim73@samsung.com>
Subject: Re: [PATCH 2/2] ARM: S5P: Add 64bit PWM timer counter for sched_clock
Date: Sat, 28 May 2011 08:17:10 +0100 [thread overview]
Message-ID: <20110528071710.GU24876@n2100.arm.linux.org.uk> (raw)
In-Reply-To: <1306534210-32659-2-git-send-email-kgene.kim@samsung.com>
On Fri, May 27, 2011 at 03:10:10PM -0700, Kukjin Kim wrote:
> From: Sangbeom Kim <sbkim73@samsung.com>
>
> Basically, PWM timer works with 33Mhz on S5P SoCs and counter
> overflow every 128 secs. So it is needed 64-bit counter for
> supporting proper sched_clock() by 32-bit timer. This patch
> handle overflow control and can solve the problem of suspend
> to resume
NAK.
This patch is a backwards step, and adds a hell of a lot of complexity
which should already be dealt with in generic code.
What is "problem of suspend to resume" exactly?
WARNING: multiple messages have this Message-ID (diff)
From: linux@arm.linux.org.uk (Russell King - ARM Linux)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 2/2] ARM: S5P: Add 64bit PWM timer counter for sched_clock
Date: Sat, 28 May 2011 08:17:10 +0100 [thread overview]
Message-ID: <20110528071710.GU24876@n2100.arm.linux.org.uk> (raw)
In-Reply-To: <1306534210-32659-2-git-send-email-kgene.kim@samsung.com>
On Fri, May 27, 2011 at 03:10:10PM -0700, Kukjin Kim wrote:
> From: Sangbeom Kim <sbkim73@samsung.com>
>
> Basically, PWM timer works with 33Mhz on S5P SoCs and counter
> overflow every 128 secs. So it is needed 64-bit counter for
> supporting proper sched_clock() by 32-bit timer. This patch
> handle overflow control and can solve the problem of suspend
> to resume
NAK.
This patch is a backwards step, and adds a hell of a lot of complexity
which should already be dealt with in generic code.
What is "problem of suspend to resume" exactly?
next prev parent reply other threads:[~2011-05-28 7:17 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-05-27 22:10 [PATCH 1/2] ARM: S5P: Cleanup s5p-time for HRTimer Kukjin Kim
2011-05-27 22:10 ` Kukjin Kim
2011-05-27 22:10 ` [PATCH 2/2] ARM: S5P: Add 64bit PWM timer counter for sched_clock Kukjin Kim
2011-05-27 22:10 ` Kukjin Kim
2011-05-28 7:17 ` Russell King - ARM Linux [this message]
2011-05-28 7:17 ` Russell King - ARM Linux
2011-05-30 1:45 ` Kukjin Kim
2011-05-30 1:45 ` Kukjin Kim
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