target/linux/s3c24xx/patches-2.6.26/1025-pcf50633-suspend-hacks.patch.patch

   1 From c96b850a977e3b7018c5ef1b145a3c11cb160265 Mon Sep 17 00:00:00 2001
   2 From: mokopatches <mokopatches@openmoko.org>
   3 Date: Wed, 16 Jul 2008 14:44:50 +0100
   4 Subject: [PATCH] pcf50633-suspend-hacks.patch
   5
   6 ---
   7  drivers/i2c/chips/pcf50633.c |   22 ++++++++++++++++++++--
   8  1 files changed, 20 insertions(+), 2 deletions(-)
   9
  10 diff --git a/drivers/i2c/chips/pcf50633.c b/drivers/i2c/chips/pcf50633.c
  11 index 5488084..0cf5e53 100644
  12 --- a/drivers/i2c/chips/pcf50633.c
  13 +++ b/drivers/i2c/chips/pcf50633.c
  14 @@ -567,8 +567,26 @@ static void pcf50633_work(struct work_struct *work)
  15          */
  16         ret = i2c_smbus_read_i2c_block_data(&pcf->client, PCF50633_REG_INT1, 5,
  17                                             pcfirq);
  18 -       if (ret != 5)
  19 -               DEBUGP("Oh crap PMU IRQ register read failed %d\n", ret);
  20 +       if (ret != 5) {
  21 +               DEBUGP("Oh crap PMU IRQ register read failed -- "
  22 +                      "retrying later %d\n", ret);
  23 +               /*
  24 +                * this situation can happen during resume, just defer
  25 +                * handling the interrupt until enough I2C is up we can
  26 +                * actually talk to the PMU.  We can't just ignore this
  27 +                * because we are on a falling edge interrupt and our
  28 +                * PMU interrupt source does not clear until we read these
  29 +                * interrupt source registers.
  30 +                */
  31 +               if (!schedule_work(&pcf->work) && !pcf->working)
  32 +                       dev_dbg(&pcf->client.dev, "work item may be lost\n");
  33 +
  34 +               /* we don't put the device here, hold it for next time */
  35 +               mutex_unlock(&pcf->working_lock);
  36 +               /* don't spew, delaying whatever else is happening */
  37 +               msleep(1);
  38 +               return;
  39 +       }
  40
  41         if (!pcf->coldplug_done) {
  42                 DEBUGP("PMU Coldplug init\n");
  43 --
  44 1.5.6.3
  45