From: Mark Brown <broonie@opensource.wolfsonmicro.com>
To: Stephen Warren <swarren@wwwdotorg.org>
Cc: Samuel Ortiz <sameo@linux.intel.com>,
linux-kernel@vger.kernel.org, Stephen Warren <swarren@nvidia.com>
Subject: Re: [PATCH] mfd: arizona: convert to regmap_add_irq_chips
Date: Sun, 29 Jul 2012 21:38:55 +0100 [thread overview]
Message-ID: <20120729203854.GF4384@opensource.wolfsonmicro.com> (raw)
In-Reply-To: <1343415776-27176-1-git-send-email-swarren@wwwdotorg.org>
On Fri, Jul 27, 2012 at 01:02:56PM -0600, Stephen Warren wrote:
> From: Stephen Warren <swarren@nvidia.com>
>
> The Arizona chip contains a single interrupt that represents the unified
> output of multiple internal interrupt controllers. This pattern has been
> factored out into regmap-irq, so convert the Arizona driver to use the
> new regmap-irq code.
So, I didn't like the patch this depends on but anyway..
> 1) regmap_add_irq_chips() calls regmap_add_irq_chip() with irq==0 rather
> than -1, so in turn irq_domain_add_linear() is called rather than
> irq_domain_add_legacy(). This change could be avoided by providing an
> irq_bases array to regmap_add_irq_chips().
This is a problem.
> 2) regmap_add_irq_chips() requests the top-level interrupt itself, so this
> happens before the Arizona driver hooks the child BOOT_DONE and
> CTRLIF_ERR interrupts. In the original, all the IRQ chips were created
> first, and then the top-level IRQ was requested. This may cause a
> functional difference if those interrupts are pending at probe() time.
Boot done is very likely to be asserted.
next prev parent reply other threads:[~2012-07-29 20:38 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-07-27 19:02 [PATCH] mfd: arizona: convert to regmap_add_irq_chips Stephen Warren
2012-07-29 20:38 ` Mark Brown [this message]
2012-07-30 17:05 ` Stephen Warren
2012-07-30 18:03 ` Mark Brown
2012-07-31 17:20 ` Stephen Warren
2012-07-31 17:22 ` Mark Brown
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