target/linux/s3c24xx/patches/0211-change-backlight-level-not-forced-up-on-resume.patch.patch

   1 From d7b66b10fd485219e211b6de14fcb5e6a5266c6a Mon Sep 17 00:00:00 2001
   2 From: Andy Green <andy@openmoko.com>
   3 Date: Fri, 25 Jul 2008 23:06:19 +0100
   4 Subject: [PATCH] change-backlight-level-not-forced-up-on-resume.patch
   5
   6 We at least always enabled backlight on resume, this patch
   7 changes us to set backlight back to last requested backlight
   8 brightness level on resume.  Note it means that you can
   9 resume with screen blanked, but it should come back if that
  10 happened with touchscreen action as usual.
  11
  12 /sys/class/backlight/pcf50633-bl/actual_brightness
  13 and
  14 /sys/class/backlight/pcf50633-bl/brightness
  15
  16 seem to agree after resume when reportedly they didn't before.
  17
  18 Signed-off-by: Andy Green <andy@openmoko.com>
  19 ---
  20  drivers/i2c/chips/pcf50633.c |   28 +++++++++++++++++-----------
  21  1 files changed, 17 insertions(+), 11 deletions(-)
  22
  23 diff --git a/drivers/i2c/chips/pcf50633.c b/drivers/i2c/chips/pcf50633.c
  24 index 1074b94..fea2f38 100644
  25 --- a/drivers/i2c/chips/pcf50633.c
  26 +++ b/drivers/i2c/chips/pcf50633.c
  27 @@ -1874,16 +1874,12 @@ static int pcf50633bl_get_intensity(struct backlight_device *bd)
  28         return intensity & 0x3f;
  29  }
  30
  31 -static int pcf50633bl_set_intensity(struct backlight_device *bd)
  32 +static int __pcf50633bl_set_intensity(struct pcf50633_data *pcf, int intensity)
  33  {
  34 -       struct pcf50633_data *pcf = bl_get_data(bd);
  35 -       int intensity = bd->props.brightness;
  36         int old_intensity = reg_read(pcf, PCF50633_REG_LEDOUT);
  37         u_int8_t ledena = 2;
  38         int ret;
  39
  40 -       dev_info(&pcf->client.dev, "pcf50633bl_set_intensity\n");
  41 -
  42         if (!(reg_read(pcf, PCF50633_REG_LEDENA) & 1))
  43                 old_intensity = 0;
  44
  45 @@ -1891,7 +1887,8 @@ static int pcf50633bl_set_intensity(struct backlight_device *bd)
  46             (bd->props.fb_blank != FB_BLANK_UNBLANK))
  47                 intensity = 0;
  48
  49 -       /* The PCF50633 cannot handle LEDOUT = 0 (datasheet p60)
  50 +       /*
  51 +        * The PCF50633 cannot handle LEDOUT = 0 (datasheet p60)
  52          * if seen, you have to re-enable the LED unit
  53          */
  54
  55 @@ -1912,6 +1909,18 @@ static int pcf50633bl_set_intensity(struct backlight_device *bd)
  56         return ret;
  57  }
  58
  59 +static int pcf50633bl_set_intensity(struct backlight_device *bd)
  60 +{
  61 +       struct pcf50633_data *pcf = bl_get_data(bd);
  62 +       int intensity = bd->props.brightness;
  63 +
  64 +       if ((bd->props.power != FB_BLANK_UNBLANK) ||
  65 +           (bd->props.fb_blank != FB_BLANK_UNBLANK))
  66 +               intensity = 0;
  67 +
  68 +       return __pcf50633bl_set_intensity(pcf, intensity);
  69 +}
  70 +
  71  static struct backlight_ops pcf50633bl_ops = {
  72         .get_brightness = pcf50633bl_get_intensity,
  73         .update_status  = pcf50633bl_set_intensity,
  74 @@ -2501,11 +2510,8 @@ void pcf50633_backlight_resume(struct pcf50633_data *pcf)
  75         /* platform defines resume ramp speed */
  76         reg_write(pcf, PCF50633_REG_LEDDIM,
  77                                        pcf->pdata->resume_backlight_ramp_speed);
  78 -       reg_write(pcf, PCF50633_REG_LEDOUT, pcf->standby_regs.misc[
  79 -                                  PCF50633_REG_LEDOUT - PCF50633_REG_AUTOOUT]);
  80 -       /* we force the backlight on in fact */
  81 -       reg_write(pcf, PCF50633_REG_LEDENA, pcf->standby_regs.misc[
  82 -                              PCF50633_REG_LEDENA - PCF50633_REG_AUTOOUT] | 1);
  83 +
  84 +       __pcf50633bl_set_intensity(pcf, pcf->backlight->props.brightness);
  85  }
  86  EXPORT_SYMBOL_GPL(pcf50633_backlight_resume);
  87
  88 --
  89 1.5.6.3
  90