From b4ba78cb85c1305ffe9f95100a578679437497f0 Mon Sep 17 00:00:00 2001 From: Andy Green Date: Wed, 19 Nov 2008 17:09:46 +0000 Subject: debug-codec-register-setting-sysfs.patch Allow direct setting of codec registers for super mega meddling power Signed-off-by: Andy Green --- sound/soc/soc-core.c | 35 +++++++++++++++++++++++++++++++++++ 1 file changed, 35 insertions(+) (limited to 'sound') diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c index 16c7453f494..23167a79c33 100644 --- a/sound/soc/soc-core.c +++ b/sound/soc/soc-core.c @@ -1003,6 +1003,38 @@ 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 @@ -1218,6 +1250,9 @@ 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; } -- cgit v1.2.3