target/linux/s3c24xx/patches-2.6.24/1178-debug-codec-register-setting-sysfs.patch.patch

   1 From 79b99f7d65cce0730998a84d2fb615ae5ad0cff5 Mon Sep 17 00:00:00 2001
   2 From: Andy Green <andy@openmoko.com>
   3 Date: Wed, 2 Jul 2008 22:39:01 +0100
   4 Subject: [PATCH] debug-codec-register-setting-sysfs.patch
   5  Allow direct setting of codec registers for super mega meddling power
   6  Signed-off-by: Andy Green <andy@openmoko.com>
   7
   8 ---
   9  sound/soc/soc-core.c |   35 +++++++++++++++++++++++++++++++++++
  10  1 files changed, 35 insertions(+), 0 deletions(-)
  11
  12 diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
  13 index 25f7818..9e20333 100644
  14 --- a/sound/soc/soc-core.c
  15 +++ b/sound/soc/soc-core.c
  16 @@ -928,6 +928,38 @@ static ssize_t codec_reg_show(struct device *dev,
  17  }
  18  static DEVICE_ATTR(codec_reg, 0444, codec_reg_show, NULL);
  19
  20 +
  21 +static ssize_t codec_reg_write(struct device *dev,
  22 +                              struct device_attribute *attr,
  23 +                              const char *buf, size_t count)
  24 +{
  25 +       u32 address;
  26 +       u32 data;
  27 +       char * end;
  28 +       size_t left = count;
  29 +       struct snd_soc_device *devdata = dev_get_drvdata(dev);
  30 +       struct snd_soc_codec *codec = devdata->codec;
  31 +
  32 +       address = simple_strtoul(buf, &end, 16);
  33 +       left -= (int)(end - buf);
  34 +       while ((*end == ' ') && (left)) {
  35 +               end++;
  36 +               left--;
  37 +       }
  38 +       if (!left)
  39 +               return count;
  40 +       data = simple_strtoul(end, &end, 16);
  41 +
  42 +       printk(KERN_INFO"user writes Codec reg 0x%02X with Data 0x%04X\n",
  43 +                                                               address, data);
  44 +
  45 +       codec->write(codec, address, data);
  46 +
  47 +       return count;
  48 +}
  49 +
  50 +static DEVICE_ATTR(codec_reg_write, 0644, NULL, codec_reg_write);
  51 +
  52  /**
  53   * snd_soc_new_ac97_codec - initailise AC97 device
  54   * @codec: audio codec
  55 @@ -1139,6 +1171,9 @@ int snd_soc_register_card(struct snd_soc_device *socdev)
  56         err = device_create_file(socdev->dev, &dev_attr_codec_reg);
  57         if (err < 0)
  58                 printk(KERN_WARNING "asoc: failed to add codec sysfs entries\n");
  59 +       err = device_create_file(socdev->dev, &dev_attr_codec_reg_write);
  60 +       if (err < 0)
  61 +               printk(KERN_WARNING "asoc: failed to add codec sysfs entries\n");
  62  out:
  63         mutex_unlock(&codec->mutex);
  64         return ret;
  65 --
  66 1.5.6.5
  67