From: Thierry Reding <thierry.reding@gmail.com>
To: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Linus Walleij <linus.walleij@linaro.org>,
Stephen Warren <swarren@wwwdotorg.org>,
Wolfram Sang <wsa@the-dreams.de>,
Grant Likely <grant.likely@linaro.org>,
Rob Herring <rob.herring@calxeda.com>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Thomas Gleixner <tglx@linutronix.de>,
linux-kernel@vger.kernel.org, linux-gpio@vger.kernel.org,
linux-tegra@vger.kernel.org, linux-i2c@vger.kernel.org,
devicetree@vger.kernel.org
Subject: Re: [PATCH 0/9] of/irq: Defer interrupt reference resolution
Date: Tue, 17 Sep 2013 14:43:01 +0200 [thread overview]
Message-ID: <20130917124300.GB6757@ulmo> (raw)
In-Reply-To: <52383B07.5030806@free-electrons.com>
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On Tue, Sep 17, 2013 at 01:20:39PM +0200, Alexandre Belloni wrote:
> Hi Thierry,
>
> On 16/09/2013 10:31, Thierry Reding wrote:
> > Hi,
> >
> > This small series allows interrupt references from the device tree to be
> > resolved at driver probe time, rather than at device creation time. The
> > current implementation resolves such references while devices are added
> > during the call to of_platform_populate(), which happens very early in
> > the boot process. This causes probe ordering issues, because all devices
> > that are an interrupt parent for other devices need to have been probed
> > by that time. This is worked around for primary interrupt controllers by
> > initializing them using a device tree specific way (of_irq_init()), but
> > it doesn't work for something like a GPIO controller that is itself a
> > platform device and an interrupt parent for other devices at the same
> > time.
[...]
> I believe this will solve the issue I was hitting back in June where
> of_i2c_register_devices() failed to get the IRQ while doing it at probe
> time was working fine:
>
> http://www.spinics.net/lists/linux-i2c/msg12523.html
>
> I couldn't test your patches yet though. I'll try to test as soon as I
> get some free time.
Yes, this series precisely aims at fixing situations as those. It'd be
great if you could give the series a spin to verify that it really works
for your case.
Thierry
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prev parent reply other threads:[~2013-09-17 12:44 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-09-16 8:31 [PATCH 0/9] of/irq: Defer interrupt reference resolution Thierry Reding
2013-09-16 8:31 ` [PATCH 1/9] of/irq: Rework of_irq_count() Thierry Reding
2013-09-16 8:31 ` [PATCH 2/9] irqdomain: Introduce __irq_create_mapping() Thierry Reding
2013-09-23 19:14 ` Linus Walleij
2013-09-23 20:29 ` Thierry Reding
2013-09-24 12:20 ` Linus Walleij
2013-09-24 18:28 ` Thierry Reding
2013-09-26 10:57 ` Linus Walleij
2013-09-16 8:32 ` [PATCH 3/9] irqdomain: Introduce __irq_create_of_mapping() Thierry Reding
2013-09-16 21:17 ` Rob Herring
2013-09-17 8:21 ` Thierry Reding
2013-09-23 19:15 ` Linus Walleij
2013-09-16 8:32 ` [PATCH 4/9] of/irq: Introduce of_irq_get() Thierry Reding
2013-09-16 21:24 ` Rob Herring
2013-09-17 13:28 ` Thierry Reding
2013-09-23 19:18 ` Linus Walleij
2013-09-23 20:49 ` Thierry Reding
2013-09-16 8:32 ` [PATCH 5/9] of/irq: Introduce __of_irq_to_resource() Thierry Reding
2013-09-16 21:29 ` Rob Herring
2013-09-23 19:20 ` Linus Walleij
2013-09-23 20:50 ` Thierry Reding
2013-09-16 8:32 ` [PATCH 6/9] of/irq: Propagate errors in of_irq_to_resource_table() Thierry Reding
2013-09-16 8:32 ` [PATCH 7/9] of/platform: Resolve interrupt references at probe time Thierry Reding
2013-09-17 13:04 ` Strashko, Grygorii
2013-09-18 10:43 ` Thierry Reding
2013-09-16 8:32 ` [PATCH 8/9] of/i2c: " Thierry Reding
2013-09-23 7:34 ` Wolfram Sang
2013-09-23 8:02 ` Thierry Reding
2013-09-23 8:35 ` Wolfram Sang
2013-09-16 8:32 ` [PATCH 9/9] gpio: tegra: Use module_platform_driver() Thierry Reding
2013-09-23 19:25 ` Linus Walleij
2013-09-23 20:38 ` Thierry Reding
2013-09-17 11:20 ` [PATCH 0/9] of/irq: Defer interrupt reference resolution Alexandre Belloni
2013-09-17 12:43 ` Thierry Reding [this message]
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