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From: "Arve Hjønnevåg" <arve@android.com>
To: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: linux-arm-kernel@lists.infradead.org,
	Russell King <linux@arm.linux.org.uk>,
	Greg Kroah-Hartman <gregkh@suse.de>,
	linux-kernel@vger.kernel.org,
	Alexander Shishkin <virtuoso@slind.org>,
	Jason Wessel <jason.wessel@windriver.com>
Subject: Re: [PATCH 1/5] ARM: etm: Don't require clock control
Date: Thu, 3 Feb 2011 16:30:46 -0800	[thread overview]
Message-ID: <AANLkTikybaV-jBo-q4Xb_POC5QRG9RRRV1RCDOnX9riG@mail.gmail.com> (raw)
In-Reply-To: <20110203124521.GK9810@sirena.org.uk>

On Thu, Feb 3, 2011 at 4:45 AM, Mark Brown
<broonie@opensource.wolfsonmicro.com> wrote:
> On Wed, Feb 02, 2011 at 06:54:19PM -0800, Arve Hj??nnev??g wrote:
>> If clk_get fail, assume the etb does not need a separate clock.
>>
>> Signed-off-by: Arve Hj??nnev??g <arve@android.com>
>
> Would it not be cleaner for the affected platforms to ensure that
> clk_get() does the right thing here, for example by returning a dummy
> clock?  Otherwise we'll just silently carry on if we can't get a clock
> we were supposed to which doesn't seem ideal.
>

This clock seem to be an omap specific virtual clock that switches the
clock source of the etb. It is not used to enable the clock when the
etb is in use, and it does not seem to have a failure case other than
not existing. So, I don't know that requiring this clock would cause
fewer problems than making it optional.

--
Arve Hjønnevåg

  reply	other threads:[~2011-02-04  0:30 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-02-03  2:54 Arve Hjønnevåg
2011-02-03  2:54 ` [PATCH 2/5] ARM: etm: Don't limit tracing to only non-secure code Arve Hjønnevåg
2011-02-03  2:54 ` [PATCH 3/5] ARM: etm: Don't trigger another overflow when trying to clear the RAM-full status Arve Hjønnevåg
2011-02-03  2:54 ` [PATCH 4/5] ARM: etm: Allow range selection Arve Hjønnevåg
2011-02-03  2:54 ` [PATCH 5/5] ARM: etm: Configure data tracing Arve Hjønnevåg
2011-02-03 12:45 ` [PATCH 1/5] ARM: etm: Don't require clock control Mark Brown
2011-02-04  0:30   ` Arve Hjønnevåg [this message]
2011-02-04 14:31     ` Mark Brown
2011-02-15  6:11 ` [PATCH 1/8] " Arve Hjønnevåg
2011-02-15  6:11 ` [PATCH 2/8] ARM: etm: Don't limit tracing to only non-secure code Arve Hjønnevåg
2011-02-15  6:11 ` [PATCH 3/8] ARM: etm: Don't try to clear the buffer full status after reading the buffer Arve Hjønnevåg
2011-02-15  6:11 ` [PATCH 4/8] ARM: etm: Allow range selection Arve Hjønnevåg
2011-02-15 13:50   ` Alexander Shishkin
2011-02-15 23:04     ` Arve Hjønnevåg
2011-02-15  6:11 ` [PATCH 5/8] ARM: etm: Configure data tracing Arve Hjønnevåg
2011-02-15  6:11 ` [PATCH 6/8] ARM: etm: Add some missing locks and error checks Arve Hjønnevåg
2011-02-15  6:11 ` [PATCH 7/8] ARM: etm: Return the entire trace buffer if it is empty after reset Arve Hjønnevåg
2011-02-15  6:11 ` [PATCH 8/8] ARM: etm: Support multiple ETMs/PTMs Arve Hjønnevåg
2011-02-24  1:36 ` [PATCH 9/9 (originally 8)] ARM: etm: Power down etm(s) when tracing is not enabled Arve Hjønnevåg

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