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regulator: Add basic per consumer debugfs 

Report the requested load and voltage for each consumer in debugfs when it
is enabled.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
hifive-unleashed-5.1
Mark Brown 2011-06-19 13:33:16 +01:00 committed by Liam Girdwood
parent 7d51a0dbe5
commit 5de705194e
1 changed files with 29 additions and 1 deletions
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30
drivers/regulator/core.c
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@ -81,6 +81,9 @@ struct regulator {
char *supply_name;
struct device_attribute dev_attr;
struct regulator_dev *rdev;
#ifdef CONFIG_DEBUG_FS
struct dentry *debugfs;
#endif
};
static int _regulator_is_enabled(struct regulator_dev *rdev);
@ -1093,7 +1096,28 @@ static struct regulator *create_regulator(struct regulator_dev *rdev,
dev->kobj.name, err);
goto link_name_err;
}
} else {
regulator->supply_name = kstrdup(supply_name, GFP_KERNEL);
if (regulator->supply_name == NULL)
goto attr_err;
}
#ifdef CONFIG_DEBUG_FS
regulator->debugfs = debugfs_create_dir(regulator->supply_name,
rdev->debugfs);
if (IS_ERR_OR_NULL(regulator->debugfs)) {
rdev_warn(rdev, "Failed to create debugfs directory\n");
regulator->debugfs = NULL;
} else {
debugfs_create_u32("uA_load", 0444, regulator->debugfs,
&regulator->uA_load);
debugfs_create_u32("min_uV", 0444, regulator->debugfs,
&regulator->min_uV);
debugfs_create_u32("max_uV", 0444, regulator->debugfs,
&regulator->max_uV);
}
#endif
mutex_unlock(&rdev->mutex);
return regulator;
link_name_err:
@ -1272,13 +1296,17 @@ void regulator_put(struct regulator *regulator)
mutex_lock(&regulator_list_mutex);
rdev = regulator->rdev;
#ifdef CONFIG_DEBUG_FS
debugfs_remove_recursive(regulator->debugfs);
#endif
/* remove any sysfs entries */
if (regulator->dev) {
sysfs_remove_link(&rdev->dev.kobj, regulator->supply_name);
kfree(regulator->supply_name);
device_remove_file(regulator->dev, &regulator->dev_attr);
kfree(regulator->dev_attr.attr.name);
}
kfree(regulator->supply_name);
list_del(&regulator->list);
kfree(regulator);