linux-kernel - [PATCH 2/4] extcon: Add extcon_get_edev_name() API to get the extcon device name

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Message-id: <1430136818-11657-3-git-send-email-cw00.choi@samsung.com>
Date:	Mon, 27 Apr 2015 21:13:36 +0900
From:	Chanwoo Choi <cw00.choi@...sung.com>
To:	linux-kernel@...r.kernel.org
Cc:	myungjoo.ham@...sung.com, kyungmin.park@...sung.com,
	ckeepax@...nsource.wolfsonmicro.com, cw00.choi@...sung.com
Subject: [PATCH 2/4] extcon: Add extcon_get_edev_name() API to get the extcon
 device name

This patch adds the extcon_get_edev_name() API to get the name of extcon device
because all information inclued in the structure extcon_dev should be accessed
by extcon core API instead of directly accessing the data.

Signed-off-by: Chanwoo Choi <cw00.choi@...sung.com>
---
 drivers/extcon/extcon.c | 9 +++++++++
 include/linux/extcon.h  | 4 ++++
 2 files changed, 13 insertions(+)

diff --git a/drivers/extcon/extcon.c b/drivers/extcon/extcon.c
index 1a93229..c5e9ebf 100644
--- a/drivers/extcon/extcon.c
+++ b/drivers/extcon/extcon.c
@@ -1046,6 +1046,15 @@ struct extcon_dev *extcon_get_edev_by_phandle(struct device *dev, int index)
 #endif /* CONFIG_OF */
 EXPORT_SYMBOL_GPL(extcon_get_edev_by_phandle);
 
+/**
+ * extcon_get_edev_name() - Get the name of the extcon device.
+ * @edev:	the extcon device
+ */
+const char *extcon_get_edev_name(struct extcon_dev *edev)
+{
+	return !edev ? NULL : edev->name;
+}
+
 static int __init extcon_class_init(void)
 {
 	return create_extcon_class();
diff --git a/include/linux/extcon.h b/include/linux/extcon.h
index 36f49c4..e2cf625 100644
--- a/include/linux/extcon.h
+++ b/include/linux/extcon.h
@@ -259,6 +259,10 @@ extern int extcon_unregister_notifier(struct extcon_dev *edev,
  * This function use phandle of devicetree to get extcon device directly.
  */
 extern struct extcon_dev *extcon_get_edev_by_phandle(struct device *dev, int index);
+
+/* Following API to get information of extcon device */
+extern const char *extcon_get_edev_name(struct extcon_dev *edev);
+
 #else /* CONFIG_EXTCON */
 static inline int extcon_dev_register(struct extcon_dev *edev)
 {
-- 
1.8.5.5

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