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regulator: Remove ifdefs for debugfs code

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If CONFIG_DEBUG_FS=y debugfs functions will never return an
ERR_PTR. Instead they'll return NULL. The intent is to remove
ifdefs in calling code.

Update the code to reflect this. We gain an extra dentry pointer
per struct regulator and struct regulator_dev but that should be
ok because most distros have debugfs compiled in anyway.

Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Stephen Boyd 2012-02-20 22:50:42 -08:00 committed by Mark Brown
parent f4d562c6e6
commit 2475143444
2 changed files with 6 additions and 24 deletions
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28
drivers/regulator/core.c
View file

@ -52,9 +52,7 @@ static LIST_HEAD(regulator_map_list);
static bool has_full_constraints;
static bool board_wants_dummy_regulator;
#ifdef CONFIG_DEBUG_FS
static struct dentry *debugfs_root;
#endif
/*
* struct regulator_map
@ -82,9 +80,7 @@ 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);
@ -1145,12 +1141,10 @@ static struct regulator *create_regulator(struct regulator_dev *rdev,
goto attr_err;
}
#ifdef CONFIG_DEBUG_FS
regulator->debugfs = debugfs_create_dir(regulator->supply_name,
rdev->debugfs);
if (IS_ERR_OR_NULL(regulator->debugfs)) {
if (!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);
@ -1159,7 +1153,6 @@ static struct regulator *create_regulator(struct regulator_dev *rdev,
debugfs_create_u32("max_uV", 0444, regulator->debugfs,
&regulator->max_uV);
}
#endif
mutex_unlock(&rdev->mutex);
return regulator;
@ -1368,9 +1361,7 @@ 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) {
@ -2710,11 +2701,9 @@ static int add_regulator_attributes(struct regulator_dev *rdev)
static void rdev_init_debugfs(struct regulator_dev *rdev)
{
#ifdef CONFIG_DEBUG_FS
rdev->debugfs = debugfs_create_dir(rdev_get_name(rdev), debugfs_root);
if (IS_ERR_OR_NULL(rdev->debugfs)) {
if (!rdev->debugfs) {
rdev_warn(rdev, "Failed to create debugfs directory\n");
rdev->debugfs = NULL;
return;
}
@ -2722,7 +2711,6 @@ static void rdev_init_debugfs(struct regulator_dev *rdev)
&rdev->use_count);
debugfs_create_u32("open_count", 0444, rdev->debugfs,
&rdev->open_count);
#endif
}
/**
@ -2900,9 +2888,7 @@ void regulator_unregister(struct regulator_dev *rdev)
return;
mutex_lock(&regulator_list_mutex);
#ifdef CONFIG_DEBUG_FS
debugfs_remove_recursive(rdev->debugfs);
#endif
flush_work_sync(&rdev->disable_work.work);
WARN_ON(rdev->open_count);
unset_regulator_supplies(rdev);
@ -3112,12 +3098,14 @@ static ssize_t supply_map_read_file(struct file *file, char __user *user_buf,
return ret;
}
#endif
static const struct file_operations supply_map_fops = {
#ifdef CONFIG_DEBUG_FS
.read = supply_map_read_file,
.llseek = default_llseek,
};
#endif
};
static int __init regulator_init(void)
{
@ -3125,16 +3113,12 @@ static int __init regulator_init(void)
ret = class_register(&regulator_class);
#ifdef CONFIG_DEBUG_FS
debugfs_root = debugfs_create_dir("regulator", NULL);
if (IS_ERR_OR_NULL(debugfs_root)) {
if (!debugfs_root)
pr_warn("regulator: Failed to create debugfs directory\n");
debugfs_root = NULL;
}
debugfs_create_file("supply_map", 0444, debugfs_root, NULL,
&supply_map_fops);
#endif
regulator_dummy_init();

2
include/linux/regulator/driver.h
View file

@ -207,9 +207,7 @@ struct regulator_dev {
void *reg_data; /* regulator_dev data */
#ifdef CONFIG_DEBUG_FS
struct dentry *debugfs;
#endif
};
struct regulator_dev *regulator_register(struct regulator_desc *regulator_desc,