From: Alek Du <alek.du@intel.com>
Date: Tue, 26 Oct 2010 21:22:41 +0000 (-0700)
Subject: pca953x: pca953x driver fixes for x86 mrst
X-Git-Tag: v2.6.37-rc1~105^2~65
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8a233f01b7d7dd587f85fa581274f168f1e88bb8;p=pandora-kernel.git

pca953x: pca953x driver fixes for x86 mrst

Our Moorestown platform has two max7315 chips which is covered by pca953x
i2c gpio driver.

A while ago this driver got updated with nested irq thread support, and it
broke the compatibity with "request_irq".  For example, the gpio_keys.c
driver can not work with this driver now.  This patch fixes the issue by
switching to generic_handle_irq.

Also fix the irq_base issue: irq_base == 0 is valid, and a "-1" value
should mean invalid. IRQ 0 is not a valid IRQ, irq_base of 0 is valid.

Signed-off-by: Alek Du <alek.du@intel.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

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