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From 048fc250b2e3b27c80e9442e5a34a82f698da9d6 Mon Sep 17 00:00:00 2001
From: Andy Green <andy@openmoko.com>
Date: Fri, 25 Jul 2008 23:06:11 +0100
Subject: [PATCH] debug-codec-register-setting-sysfs.patch
Allow direct setting of codec registers for super mega meddling power
Signed-off-by: Andy Green <andy@openmoko.com>
---
sound/soc/soc-core.c | 35 +++++++++++++++++++++++++++++++++++
1 files changed, 35 insertions(+), 0 deletions(-)
diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index e148db9..67223fe 100644
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -935,6 +935,38 @@ static ssize_t codec_reg_show(struct device *dev,
}
static DEVICE_ATTR(codec_reg, 0444, codec_reg_show, NULL);
+
+static ssize_t codec_reg_write(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ u32 address;
+ u32 data;
+ char * end;
+ size_t left = count;
+ struct snd_soc_device *devdata = dev_get_drvdata(dev);
+ struct snd_soc_codec *codec = devdata->codec;
+
+ address = simple_strtoul(buf, &end, 16);
+ left -= (int)(end - buf);
+ while ((*end == ' ') && (left)) {
+ end++;
+ left--;
+ }
+ if (!left)
+ return count;
+ data = simple_strtoul(end, &end, 16);
+
+ printk(KERN_INFO"user writes Codec reg 0x%02X with Data 0x%04X\n",
+ address, data);
+
+ codec->write(codec, address, data);
+
+ return count;
+}
+
+static DEVICE_ATTR(codec_reg_write, 0644, NULL, codec_reg_write);
+
/**
* snd_soc_new_ac97_codec - initailise AC97 device
* @codec: audio codec
@@ -1150,6 +1182,9 @@ int snd_soc_register_card(struct snd_soc_device *socdev)
mutex_unlock(&codec->mutex);
+ err = device_create_file(socdev->dev, &dev_attr_codec_reg_write);
+ if (err < 0)
+ printk(KERN_WARNING "asoc: failed to add codec sysfs entries\n");
out:
return ret;
}
--
1.5.6.3
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