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ASoC: Add sysfs entries via static attribute groups 

Instead of calling device_create_file() manually, assign the static
attribute group entries at the device registration.  This simplifies
the error handling and avoids the possible races.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
hifive-unleashed-5.1
Takashi Iwai 2015-01-30 20:16:37 +01:00 committed by Mark Brown
parent 97bf6af1f9
commit d29697dc3b
3 changed files with 39 additions and 35 deletions
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2
include/sound/soc-dapm.h
View File

@ -405,7 +405,7 @@ int snd_soc_dapm_mux_update_power(struct snd_soc_dapm_context *dapm,
struct snd_soc_dapm_update *update);
/* dapm sys fs - used by the core */
int snd_soc_dapm_sys_add(struct device *dev);
extern struct attribute *soc_dapm_dev_attrs[];
void snd_soc_dapm_debugfs_init(struct snd_soc_dapm_context *dapm,
struct dentry *parent);

58
sound/soc/soc-core.c
View File

@ -191,6 +191,39 @@ static ssize_t pmdown_time_set(struct device *dev,
static DEVICE_ATTR(pmdown_time, 0644, pmdown_time_show, pmdown_time_set);
static struct attribute *soc_dev_attrs[] = {
&dev_attr_codec_reg.attr,
&dev_attr_pmdown_time.attr,
NULL
};
static umode_t soc_dev_attr_is_visible(struct kobject *kobj,
struct attribute *attr, int idx)
{
struct device *dev = kobj_to_dev(kobj);
struct snd_soc_pcm_runtime *rtd = dev_get_drvdata(dev);
if (attr == &dev_attr_pmdown_time.attr)
return attr->mode; /* always visible */
return rtd->codec ? attr->mode : 0; /* enabled only with codec */
}
static const struct attribute_group soc_dapm_dev_group = {
.attrs = soc_dapm_dev_attrs,
.is_visible = soc_dev_attr_is_visible,
};
static const struct attribute_group soc_dev_roup = {
.attrs = soc_dev_attrs,
.is_visible = soc_dev_attr_is_visible,
};
static const struct attribute_group *soc_dev_attr_groups[] = {
&soc_dapm_dev_group,
&soc_dev_roup,
NULL
};
#ifdef CONFIG_DEBUG_FS
static ssize_t codec_reg_read_file(struct file *file, char __user *user_buf,
size_t count, loff_t *ppos)
@ -949,8 +982,6 @@ static void soc_remove_link_dais(struct snd_soc_card *card, int num, int order)
/* unregister the rtd device */
if (rtd->dev_registered) {
device_remove_file(rtd->dev, &dev_attr_pmdown_time);
device_remove_file(rtd->dev, &dev_attr_codec_reg);
device_unregister(rtd->dev);
rtd->dev_registered = 0;
}
@ -1120,6 +1151,7 @@ static int soc_post_component_init(struct snd_soc_pcm_runtime *rtd,
device_initialize(rtd->dev);
rtd->dev->parent = rtd->card->dev;
rtd->dev->release = rtd_release;
rtd->dev->groups = soc_dev_attr_groups;
dev_set_name(rtd->dev, "%s", name);
dev_set_drvdata(rtd->dev, rtd);
mutex_init(&rtd->pcm_mutex);
@ -1136,23 +1168,6 @@ static int soc_post_component_init(struct snd_soc_pcm_runtime *rtd,
return ret;
}
rtd->dev_registered = 1;
if (rtd->codec) {
/* add DAPM sysfs entries for this codec */
ret = snd_soc_dapm_sys_add(rtd->dev);
if (ret < 0)
dev_err(rtd->dev,
"ASoC: failed to add codec dapm sysfs entries: %d\n",
ret);
/* add codec sysfs entries */
ret = device_create_file(rtd->dev, &dev_attr_codec_reg);
if (ret < 0)
dev_err(rtd->dev,
"ASoC: failed to add codec sysfs files: %d\n",
ret);
}
return 0;
}
@ -1308,11 +1323,6 @@ static int soc_probe_link_dais(struct snd_soc_card *card, int num, int order)
}
#endif
ret = device_create_file(rtd->dev, &dev_attr_pmdown_time);
if (ret < 0)
dev_warn(rtd->dev, "ASoC: failed to add pmdown_time sysfs: %d\n",
ret);
if (cpu_dai->driver->compress_dai) {
/*create compress_device"*/
ret = soc_new_compress(rtd, num);

14
sound/soc/soc-dapm.c
View File

@ -2127,15 +2127,10 @@ static ssize_t dapm_widget_show(struct device *dev,
static DEVICE_ATTR(dapm_widget, 0444, dapm_widget_show, NULL);
int snd_soc_dapm_sys_add(struct device *dev)
{
return device_create_file(dev, &dev_attr_dapm_widget);
}
static void snd_soc_dapm_sys_remove(struct device *dev)
{
device_remove_file(dev, &dev_attr_dapm_widget);
}
struct attribute *soc_dapm_dev_attrs[] = {
&dev_attr_dapm_widget.attr,
NULL
};
static void dapm_free_path(struct snd_soc_dapm_path *path)
{
@ -3903,7 +3898,6 @@ void snd_soc_dapm_auto_nc_pins(struct snd_soc_card *card)
*/
void snd_soc_dapm_free(struct snd_soc_dapm_context *dapm)
{
snd_soc_dapm_sys_remove(dapm->dev);
dapm_debugfs_cleanup(dapm);
dapm_free_widgets(dapm);
list_del(&dapm->list);