From: simon.guinot@sequanux.org (Simon Guinot)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v2 0/2] refactoring for mask_cache
Date: Sat, 16 Mar 2013 00:34:45 +0100 [thread overview]
Message-ID: <20130315233445.GP21620@kw.sim.vm.gnt> (raw)
In-Reply-To: <20130315212545.GT21478@lunn.ch>
On Fri, Mar 15, 2013 at 10:25:45PM +0100, Andrew Lunn wrote:
> On Fri, Mar 15, 2013 at 08:36:13PM +0100, Gerlando Falauto wrote:
> > Hi everyone,
> > here is a 2-patch set to address the issue found with Orion,
> > hoping I understood correctly what Thomas meant.
> > Even though I'm also providing changes for mvebu, I only
> > tested the patch on a 3.0.40 kernel with the plat-orion/gpio.c driver.
> > We currently do not have a working 3.6+ configuration for our Kirkwood
> > boards (3.6 is apparently where this mvebu gpio driver was introduced),
> > so I would be glad if someone could give it a try.
>
> Hi Garlando
>
> Could you describe how to reproduce the issue, so i can test it on
> Kirkwood. I have a kirkwood with one GPIO button which i can use for
> tests.
Hi Andrew,
Maybe you could add debugfs entries to the GPIO drivers plat-orion and
gpio-mvebu, in order to allow to dump the GPIO registers. It could even
be reusable for other purposes.
With this debug informations, you can:
1 - Register a level interrupt for GPIO A. This GPIO could be unused.
Maybe you can do that from some board setup code, once that the
GPIO subsystem is initialized.
2 - Register an edge interrupt for GPIO B. To do that, you could simply
load the gpio-key driver. It should eat your GPIO button.
3 - Check the GPIO edge mask register (via debugfs). With the issue,
GPIO A and GPIO B are unmasked.
Or alternatively, I guess there is a more straightforward way:
1 - Disable the GPIO key driver.
2 - Register a level interrupt for the GPIO button.
3 - Register an edge interrupt for an unused GPIO (take care about
the active state).
4 - Push and release the button. With the issue, your system should
freeze. The edge interrupt for the GPIO button is asserted and is
never acknowledged.
If you want, I can take care of testing the patches.
Simon
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next prev parent reply other threads:[~2013-03-15 23:34 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-03-14 16:10 [PATCH] genirq: allow an alternative setup for the mask cache Holger Brunck
2013-03-14 17:45 ` Simon Guinot
2013-03-15 10:43 ` Holger Brunck
2013-03-15 11:02 ` Thomas Gleixner
2013-03-15 16:26 ` Gerlando Falauto
2013-03-15 19:55 ` Thomas Gleixner
2013-03-14 19:08 ` Thomas Gleixner
2013-03-14 19:42 ` Ezequiel Garcia
2013-03-18 11:05 ` Gerlando Falauto
2013-03-15 19:36 ` [PATCH v2 0/2] refactoring for mask_cache Gerlando Falauto
2013-03-15 19:36 ` [PATCH 1/2] genirq: cosmetic: remove cur_regs Gerlando Falauto
2013-03-15 19:36 ` [PATCH 2/2] genirq: move mask_cache into struct irq_chip_type Gerlando Falauto
2013-03-15 20:47 ` Thomas Gleixner
2013-03-18 7:59 ` Gerlando Falauto
2013-03-18 8:56 ` Thomas Gleixner
2013-03-15 21:25 ` [PATCH v2 0/2] refactoring for mask_cache Andrew Lunn
2013-03-15 23:34 ` Simon Guinot [this message]
2013-03-18 14:00 ` [PATCH v3 0/9] " Gerlando Falauto
2013-03-18 14:00 ` [PATCH v3 1/9] genirq: cosmetic: remove cur_regs Gerlando Falauto
2013-03-18 14:00 ` [PATCH v3 2/9] genirq: add mask_cache and pmask_cache into struct irq_chip_type Gerlando Falauto
2013-03-19 11:32 ` Thomas Gleixner
2013-03-18 14:00 ` [PATCH v3 3/9] gpio: mvebu: convert to usage of *pmask_cache within irq_chip_type Gerlando Falauto
2013-03-18 14:00 ` [PATCH v3 4/9] MIPS: JZ4740: " Gerlando Falauto
2013-03-18 14:00 ` [PATCH v3 5/9] ARM: SAMSUNG: " Gerlando Falauto
2013-03-18 14:00 ` [PATCH v3 6/9] genirq: rename mask_cache to shared_mask_cache Gerlando Falauto
2013-03-18 14:00 ` [PATCH v3 7/9] genirq: handle separate mask registers Gerlando Falauto
2013-03-18 14:00 ` [PATCH v3 8/9] orion-gpio: enable IRQ_GC_SEPARATE_MASK_REGISTERS Gerlando Falauto
2013-03-18 14:00 ` [PATCH v3 9/9] gpio: mvebu: " Gerlando Falauto
2013-03-18 14:28 ` [PATCH v3 0/9] refactoring for mask_cache Simon Guinot
2013-03-18 14:39 ` Simon Guinot
2013-03-19 10:03 ` Ezequiel Garcia
2013-03-19 10:09 ` Gerlando Falauto
2013-03-19 11:25 ` Ezequiel Garcia
2013-03-19 11:06 ` Jason Cooper
2013-03-19 11:10 ` Gerlando Falauto
2013-03-19 11:44 ` Jason Cooper
2013-03-19 11:56 ` Jason Cooper
2013-03-20 17:40 ` Gerlando Falauto
2013-03-20 21:42 ` Thomas Gleixner
2013-03-21 10:37 ` Gerlando Falauto
2013-03-21 10:59 ` Simon Guinot
2013-03-19 11:19 ` Ezequiel Garcia
2013-03-21 10:51 ` Simon Guinot
2013-03-21 11:24 ` Gerlando Falauto
2013-04-04 9:31 ` Ezequiel Garcia
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