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