We only expose the use and open counts to userspace, providing a tiny
bit of insight into what the API is up to.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
---
This is clearly a completely different tack to Brandon's patches in
terms of content but it does expose a bit of the internals like I was
talking about in review of those patches and it gets the basic debugfs
setup stuff done so we don't need to re-review that.
drivers/regulator/core.c | 35 +++++++++++++++++++++++++++++++++++
include/linux/regulator/driver.h | 8 ++++++--
2 files changed, 41 insertions(+), 2 deletions(-)
diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index 6066a8f..9fa2095 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -17,6 +17,7 @@
#include <linux/kernel.h>
#include <linux/init.h>
+#include <linux/debugfs.h>
#include <linux/device.h>
#include <linux/slab.h>
#include <linux/err.h>
@@ -47,6 +48,10 @@ 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
*
@@ -2404,6 +2409,23 @@ static int add_regulator_attributes(struct regulator_dev *rdev)
return status;
}
+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(rdev->debugfs) || !rdev->debugfs) {
+ rdev_warn(rdev, "Failed to create debugfs directory\n");
+ rdev->debugfs = NULL;
+ return;
+ }
+
+ debugfs_create_u32("use_count", 0444, rdev->debugfs,
+ &rdev->use_count);
+ debugfs_create_u32("open_count", 0444, rdev->debugfs,
+ &rdev->open_count);
+#endif
+}
+
/**
* regulator_register - register regulator
* @regulator_desc: regulator to register
@@ -2548,6 +2570,8 @@ struct regulator_dev *regulator_register(struct regulator_desc ...
