From: Arnd Bergmann <arnd@arndb.de>
To: sdharia@codeaurora.org
Cc: Mark Brown <broonie@opensource.wolfsonmicro.com>,
Kenneth Heitke <kheitke@codeaurora.org>,
David Brown <davidb@codeaurora.org>,
bryanh@codeaurora.org, linux-arm-msm@vger.kernel.org,
rdunlap@xenotime.net, rmk+kernel@arm.linux.org.uk,
john.stultz@linaro.org, akpm@linux-foundation.org,
ohad@wizery.com, gregkh@suse.de, stefanr@s5r6.in-berlin.de,
lethal@linux-sh.org, linville@tuxdriver.com, zajec5@gmail.com,
linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [RFC PATCH] slimbus: Linux driver framework for SLIMbus.
Date: Mon, 22 Aug 2011 15:47:14 +0200 [thread overview]
Message-ID: <201108221547.14657.arnd@arndb.de> (raw)
In-Reply-To: <bd22ca4871ed2ce80b881a36dac5061c.squirrel@www.codeaurora.org>
On Monday 22 August 2011, Sagar Dharia wrote:
> Another suggestion about probe is having callback to notify when the
> device is ready-to-use after driver probe powers it up. I will change the
> framework accordingly to have this done.
Is this actually needed? If the driver is responsible for powering up the
device, maybe it's enough to have a simple exported function from the
framework that blocks until the device has been probed, using a
'completion' or a similar wait_event() based primitive for waiting for
the device:
1. The bus driver creates the struct slim_device in one of the three ways
mentioned and does init_completion().
2. The probe function of the driver ensures that the regulators/clocks/...
are set up correctly and then calls wait_for_completion()
3. When the device shows up on the bus, the slimbus layer calls complete().
Steps 2 and 3 can happen in any order.
Arnd
next prev parent reply other threads:[~2011-08-22 13:47 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-08-10 23:31 [RFC PATCH] slimbus: Linux driver framework for SLIMbus Kenneth Heitke
2011-08-11 12:55 ` Arnd Bergmann
2011-08-11 20:51 ` Kenneth Heitke
2011-08-12 16:46 ` Mark Brown
2011-08-16 13:37 ` Arnd Bergmann
2011-08-16 13:50 ` David Brown
2011-08-16 14:32 ` Arnd Bergmann
2011-08-16 15:40 ` Mark Brown
2011-08-16 17:13 ` Kenneth Heitke
2011-08-16 17:16 ` Kenneth Heitke
2011-08-16 17:44 ` sdharia
2011-08-16 19:49 ` Arnd Bergmann
2011-08-16 23:27 ` Kenneth Heitke
2011-08-17 0:59 ` Mark Brown
2011-08-17 1:54 ` Sagar Dharia
2011-08-17 6:32 ` Mark Brown
2011-08-17 7:09 ` Arnd Bergmann
2011-08-17 8:03 ` Mark Brown
2011-08-17 10:42 ` Arnd Bergmann
2011-08-17 13:04 ` Mark Brown
2011-08-17 13:17 ` Linus Walleij
2011-08-18 3:00 ` Mark Brown
2011-08-24 9:15 ` Linus Walleij
2011-08-24 9:21 ` Mark Brown
2011-08-25 7:10 ` Linus Walleij
2011-08-25 9:44 ` Mark Brown
2011-08-17 14:00 ` Arnd Bergmann
2011-08-19 3:24 ` Mark Brown
2011-08-21 22:10 ` Sagar Dharia
2011-08-22 13:47 ` Arnd Bergmann [this message]
2011-08-16 15:23 ` Mark Brown
2011-08-14 14:34 ` Mark Brown
2011-08-15 17:55 ` Kenneth Heitke
2011-08-15 19:37 ` Russell King
2011-08-15 20:12 ` Kenneth Heitke
2011-08-16 19:33 ` Jean Delvare
2011-08-17 13:12 ` Mark Brown
2011-08-23 23:24 ` Randy Dunlap
2011-08-23 23:32 ` Kenneth Heitke
2011-08-24 0:13 ` Joe Perches
2011-08-24 0:22 ` Kenneth Heitke
2011-08-24 14:14 ` Arnd Bergmann
2011-08-24 17:24 ` Joe Perches
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