Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
ASoC: Make pmdown_time runtime configurable
Provide a sysfs file allowing userspace to inspect and change the
pmdown_time setting at runtime.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
+27
sound/soc/soc-core.c
+27
sound/soc/soc-core.c
···
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static DEVICE_ATTR(codec_reg, 0444, codec_reg_show, NULL);
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static ssize_t pmdown_time_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct snd_soc_device *socdev = dev_get_drvdata(dev);
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struct snd_soc_card *card = socdev->card;
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return sprintf(buf, "%d\n", card->pmdown_time);
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}
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static ssize_t pmdown_time_set(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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struct snd_soc_device *socdev = dev_get_drvdata(dev);
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struct snd_soc_card *card = socdev->card;
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strict_strtol(buf, 10, &card->pmdown_time);
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return count;
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}
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static DEVICE_ATTR(pmdown_time, 0644, pmdown_time_show, pmdown_time_set);
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+
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#ifdef CONFIG_DEBUG_FS
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static int codec_reg_open_file(struct inode *inode, struct file *file)
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{
···
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ret = snd_soc_dapm_sys_add(card->socdev->dev);
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if (ret < 0)
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printk(KERN_WARNING "asoc: failed to add dapm sysfs entries\n");
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ret = device_create_file(card->socdev->dev, &dev_attr_pmdown_time);
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if (ret < 0)
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printk(KERN_WARNING "asoc: failed to add pmdown_time sysfs\n");
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ret = device_create_file(card->socdev->dev, &dev_attr_codec_reg);
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if (ret < 0)