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

   1 From b6aa20d6e44fccefba7ca933d11befba3611a68a Mon Sep 17 00:00:00 2001
   2 From: Andy Green <andy@openmoko.com>
   3 Date: Wed, 2 Jul 2008 22:40:58 +0100
   4 Subject: [PATCH] fix-pcf50633-add-back-gratuitous-isr-work-call-in-resume.patch
   5
   6 Sean McNeil reports that he doesn't get pcf50633 interrupts any
   7 more after resume.  This adds back the call to ISR work in
   8 the resume, removal of which is probably to do with it.
   9
  10 Signed-off-by: Andy Green <andy@openmoko.com>
  11 ---
  12  drivers/i2c/chips/pcf50633.c |   10 ++++++++++
  13  1 files changed, 10 insertions(+), 0 deletions(-)
  14
  15 diff --git a/drivers/i2c/chips/pcf50633.c b/drivers/i2c/chips/pcf50633.c
  16 index 6e50ae8..037ae04 100644
  17 --- a/drivers/i2c/chips/pcf50633.c
  18 +++ b/drivers/i2c/chips/pcf50633.c
  19 @@ -2474,6 +2474,16 @@ static int pcf50633_resume(struct device *dev)
  20
  21         mutex_unlock(&pcf->lock);
  22
  23 +       /* gratuitous call to PCF work function, in the case that the PCF
  24 +        * interrupt edge was missed during resume, this forces the pending
  25 +        * register clear and lifts the interrupt back high again.  In the
  26 +        * case nothing is waiting for service, no harm done.
  27 +        */
  28 +
  29 +       get_device(&pcf->client.dev);
  30 +       if (!schedule_work(&pcf->work) && !pcf->working)
  31 +               dev_err(&pcf->client.dev, "resume work item may be lost\n");
  32 +
  33         callback_all_resume_dependencies(&pcf->resume_dependency);
  34
  35         return 0;
  36 --
  37 1.5.6.5
  38