From: Tomasz Figa <tomasz.figa@gmail.com>
To: Chirantan Ekbote <chirantan@chromium.org>,
Russell King <linux@arm.linux.org.uk>
Cc: Olof Johansson <olof@lixom.net>,
Doug Anderson <dianders@chromium.org>,
Kukjin Kim <kgene.kim@samsung.com>,
linux-arm-kernel@lists.infradead.org,
linux-samsung-soc@vger.kernel.org
Subject: Re: [PATCH] arm: dts: exynos5: Remove multi core timer
Date: Thu, 15 May 2014 23:14:13 +0200 [thread overview]
Message-ID: <53752E25.9060604@gmail.com> (raw)
In-Reply-To: <1400188079-21832-1-git-send-email-chirantan@chromium.org>
Hi Chirantan,
On 15.05.2014 23:07, Chirantan Ekbote wrote:
> The multi core timer and the ARM architected timer are two different
> interfaces to the same underlying hardware timer. This causes some
> strange timing issues when they are both enabled at the same time so
> remove the mct from the device tree and keep only the architected
> timer.
Huh? I've always thought MCT is a completely separate hardware block
outside of ARM cores, while architected timers are embedded inside the
CPU block in which the ARM cores reside. Could you elaborate on this?
Best regards,
Tomasz
WARNING: multiple messages have this Message-ID (diff)
From: tomasz.figa@gmail.com (Tomasz Figa)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] arm: dts: exynos5: Remove multi core timer
Date: Thu, 15 May 2014 23:14:13 +0200 [thread overview]
Message-ID: <53752E25.9060604@gmail.com> (raw)
In-Reply-To: <1400188079-21832-1-git-send-email-chirantan@chromium.org>
Hi Chirantan,
On 15.05.2014 23:07, Chirantan Ekbote wrote:
> The multi core timer and the ARM architected timer are two different
> interfaces to the same underlying hardware timer. This causes some
> strange timing issues when they are both enabled at the same time so
> remove the mct from the device tree and keep only the architected
> timer.
Huh? I've always thought MCT is a completely separate hardware block
outside of ARM cores, while architected timers are embedded inside the
CPU block in which the ARM cores reside. Could you elaborate on this?
Best regards,
Tomasz
next prev parent reply other threads:[~2014-05-15 21:14 UTC|newest]
Thread overview: 68+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-15 21:07 [PATCH] arm: dts: exynos5: Remove multi core timer Chirantan Ekbote
2014-05-15 21:07 ` Chirantan Ekbote
2014-05-15 21:14 ` Tomasz Figa [this message]
2014-05-15 21:14 ` Tomasz Figa
2014-05-15 21:33 ` Doug Anderson
2014-05-15 21:33 ` Doug Anderson
2014-05-15 21:40 ` Tomasz Figa
2014-05-15 21:40 ` Tomasz Figa
2014-05-15 21:54 ` Doug Anderson
2014-05-15 21:54 ` Doug Anderson
2014-05-15 22:13 ` Tomasz Figa
2014-05-15 22:13 ` Tomasz Figa
2014-05-15 22:44 ` Doug Anderson
2014-05-15 22:44 ` Doug Anderson
2014-05-15 23:03 ` Chirantan Ekbote
2014-05-15 23:03 ` Chirantan Ekbote
2014-05-15 23:18 ` David Riley
2014-05-15 23:18 ` David Riley
2014-05-15 23:25 ` Tomasz Figa
2014-05-15 23:25 ` Tomasz Figa
2014-05-15 23:39 ` Olof Johansson
2014-05-15 23:39 ` Olof Johansson
2014-05-15 23:45 ` Doug Anderson
2014-05-15 23:45 ` Doug Anderson
2014-05-15 23:46 ` Tomasz Figa
2014-05-15 23:46 ` Tomasz Figa
2014-05-15 23:43 ` Doug Anderson
2014-05-15 23:43 ` Doug Anderson
2014-05-16 0:31 ` Sonny Rao
2014-05-16 0:31 ` Sonny Rao
2014-05-16 22:56 ` Chirantan Ekbote
2014-05-16 22:56 ` Chirantan Ekbote
2014-05-17 0:02 ` Kukjin Kim
2014-05-17 0:02 ` Kukjin Kim
2014-05-19 15:12 ` Doug Anderson
2014-05-19 15:12 ` Doug Anderson
2014-05-21 13:24 ` Kukjin Kim
2014-05-21 13:24 ` Kukjin Kim
2014-05-21 15:30 ` Olof Johansson
2014-05-21 15:30 ` Olof Johansson
2014-05-21 16:20 ` Tomasz Figa
2014-05-21 16:20 ` Tomasz Figa
2014-05-21 18:34 ` Chirantan Ekbote
2014-05-21 18:34 ` Chirantan Ekbote
2014-05-28 17:38 ` Doug Anderson
2014-05-28 17:38 ` Doug Anderson
2014-06-02 23:22 ` Doug Anderson
2014-06-02 23:22 ` Doug Anderson
2014-05-21 12:47 ` Kukjin Kim
2014-05-21 12:47 ` Kukjin Kim
2014-05-21 18:34 ` Chirantan Ekbote
2014-05-21 18:34 ` Chirantan Ekbote
2014-05-28 17:23 ` Doug Anderson
2014-05-28 17:23 ` Doug Anderson
2014-06-03 18:41 ` Chirantan Ekbote
2014-06-03 18:41 ` Chirantan Ekbote
2014-06-04 1:45 ` Kukjin Kim
2014-06-04 1:45 ` Kukjin Kim
2014-05-28 17:37 ` Doug Anderson
2014-05-28 17:37 ` Doug Anderson
2014-05-29 20:42 ` Vincent Guittot
2014-05-29 20:42 ` Vincent Guittot
2014-05-29 21:41 ` Doug Anderson
2014-05-29 21:41 ` Doug Anderson
2014-05-15 21:44 ` Kukjin Kim
2014-05-15 21:44 ` Kukjin Kim
2014-05-15 21:44 ` Tomasz Figa
2014-05-15 21:44 ` Tomasz Figa
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