target/linux/s3c24xx/patches-2.6.26/0179-fix-pcf50633-really-defer-backlight-on-resume.patch.patch

   1 From 568981c881e20fccdbfffb073c3868dcdc012446 Mon Sep 17 00:00:00 2001
   2 From: Andy Green <andy@openmoko.com>
   3 Date: Fri, 25 Jul 2008 23:06:15 +0100
   4 Subject: [PATCH] fix-pcf50633-really-defer-backlight-on-resume.patch
   5
   6 Backlight wasn't off by default on resume, so it was never really
   7 deferred (until LCM is initialized).  This fixes that and so removes
   8 the brief white screen between pcf50633 resume and LCM init.
   9
  10 Signed-off-by: Andy Green <andy@openmoko.com>
  11 ---
  12  drivers/i2c/chips/pcf50633.c |   23 +++++++++++++++++------
  13  1 files changed, 17 insertions(+), 6 deletions(-)
  14
  15 diff --git a/drivers/i2c/chips/pcf50633.c b/drivers/i2c/chips/pcf50633.c
  16 index 33c4ef4..bbc8ae6 100644
  17 --- a/drivers/i2c/chips/pcf50633.c
  18 +++ b/drivers/i2c/chips/pcf50633.c
  19 @@ -2474,13 +2474,14 @@ EXPORT_SYMBOL_GPL(pcf50633_ready);
  20
  21  void pcf50633_backlight_resume(struct pcf50633_data *pcf)
  22  {
  23 +       dev_info(&pcf->client.dev, "pcf50633_backlight_resume\n");
  24 +
  25         /* we force the backlight on in fact */
  26 -       __reg_write(pcf, PCF50633_REG_LEDOUT, pcf->standby_regs.misc[
  27 +       reg_write(pcf, PCF50633_REG_LEDDIM, 1);
  28 +       reg_write(pcf, PCF50633_REG_LEDOUT, pcf->standby_regs.misc[
  29                                    PCF50633_REG_LEDOUT - PCF50633_REG_AUTOOUT]);
  30 -       __reg_write(pcf, PCF50633_REG_LEDENA, pcf->standby_regs.misc[
  31 +       reg_write(pcf, PCF50633_REG_LEDENA, pcf->standby_regs.misc[
  32                                PCF50633_REG_LEDENA - PCF50633_REG_AUTOOUT] | 1);
  33 -       __reg_write(pcf, PCF50633_REG_LEDDIM, pcf->standby_regs.misc[
  34 -                                  PCF50633_REG_LEDDIM - PCF50633_REG_AUTOOUT]);
  35  }
  36  EXPORT_SYMBOL_GPL(pcf50633_backlight_resume);
  37
  38 @@ -2491,6 +2492,7 @@ static int pcf50633_resume(struct device *dev)
  39         struct pcf50633_data *pcf = i2c_get_clientdata(client);
  40         int ret;
  41         u8 res[5];
  42 +       u8 misc[PCF50633_REG_LEDDIM - PCF50633_REG_AUTOOUT + 1];
  43
  44         dev_info(dev, "pcf50633_resume suspended on entry = %d\n",
  45                                                  (int)pcf->suspend_state);
  46 @@ -2502,11 +2504,20 @@ static int pcf50633_resume(struct device *dev)
  47
  48         __reg_write(pcf, PCF50633_REG_OOCTIM2, pcf->standby_regs.ooctim2);
  49
  50 +       memcpy(misc, pcf->standby_regs.misc, sizeof(pcf->standby_regs.misc));
  51 +
  52 +       if (pcf->pdata->defer_resume_backlight) {
  53 +               misc[PCF50633_REG_LEDOUT - PCF50633_REG_AUTOOUT] = 1;
  54 +               misc[PCF50633_REG_LEDENA - PCF50633_REG_AUTOOUT] = 0x20;
  55 +               misc[PCF50633_REG_LEDCTL - PCF50633_REG_AUTOOUT] = 1;
  56 +               misc[PCF50633_REG_LEDDIM - PCF50633_REG_AUTOOUT] = 1;
  57 +       }
  58 +
  59         /* regulator voltages and enable states */
  60         ret = i2c_smbus_write_i2c_block_data(&pcf->client,
  61                                              PCF50633_REG_AUTOOUT,
  62 -                                            sizeof(pcf->standby_regs.misc) - 4,
  63 -                                            &pcf->standby_regs.misc[0]);
  64 +                                            sizeof(misc),
  65 +                                            &misc[0]);
  66         if (ret)
  67                 dev_err(dev, "Failed to restore misc :-( %d\n", ret);
  68
  69 --
  70 1.5.6.3
  71