openwrt-xburst/target/linux/s3c24xx/patches-2.6.24/1193-fix-pcf50633-add-back-gratuitous-isr-work-call-in-re.patch

From b6aa20d6e44fccefba7ca933d11befba3611a68a Mon Sep 17 00:00:00 2001
From: Andy Green <andy@openmoko.com>
Date: Wed, 2 Jul 2008 22:40:58 +0100
Subject: [PATCH] fix-pcf50633-add-back-gratuitous-isr-work-call-in-resume.patch

Sean McNeil reports that he doesn't get pcf50633 interrupts any
more after resume.  This adds back the call to ISR work in
the resume, removal of which is probably to do with it.

Signed-off-by: Andy Green <andy@openmoko.com>
---
 drivers/i2c/chips/pcf50633.c |   10 ++++++++++
 1 files changed, 10 insertions(+), 0 deletions(-)

diff --git a/drivers/i2c/chips/pcf50633.c b/drivers/i2c/chips/pcf50633.c
index 6e50ae8..037ae04 100644
--- a/drivers/i2c/chips/pcf50633.c
+++ b/drivers/i2c/chips/pcf50633.c
@@ -2474,6 +2474,16 @@ static int pcf50633_resume(struct device *dev)
 
 	mutex_unlock(&pcf->lock);
 
+	/* gratuitous call to PCF work function, in the case that the PCF
+	 * interrupt edge was missed during resume, this forces the pending
+	 * register clear and lifts the interrupt back high again.  In the
+	 * case nothing is waiting for service, no harm done.
+	 */
+
+	get_device(&pcf->client.dev);
+	if (!schedule_work(&pcf->work) && !pcf->working)
+		dev_err(&pcf->client.dev, "resume work item may be lost\n");
+
 	callback_all_resume_dependencies(&pcf->resume_dependency);
 
 	return 0;
-- 
1.5.6.5