extcon: Move OF helper function to extcon core and change function name

This patch move simply OF helper function to extcon core and change function
name as following:
- of_extcon_get_extcon_dev() -> extcon_get_edev_by_phandle()

Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Acked-by: Felipe Balbi <balbi@ti.com>

7 files changed, 55 insertions, 95 deletions

diff --git a/drivers/extcon/Kconfig b/drivers/extcon/Kconfig
index bdb5a00f1dfa..be56e8ac95e6 100644
--- a/drivers/extcon/Kconfig
+++ b/drivers/extcon/Kconfig
@@ -14,10 +14,6 @@ if EXTCON
 
 comment "Extcon Device Drivers"
 
-config OF_EXTCON
-        def_tristate y
-        depends on OF
-
 config EXTCON_GPIO
         tristate "GPIO extcon support"
         depends on GPIOLIB
diff --git a/drivers/extcon/Makefile b/drivers/extcon/Makefile
index 43eccc0e3448..bf7861ec0906 100644
--- a/drivers/extcon/Makefile
+++ b/drivers/extcon/Makefile
@@ -2,8 +2,6 @@
 # Makefile for external connector class (extcon) devices
 #
 
-obj-$(CONFIG_OF_EXTCON)         += of_extcon.o
-
 obj-$(CONFIG_EXTCON)            += extcon-class.o
 obj-$(CONFIG_EXTCON_GPIO)       += extcon-gpio.o
 obj-$(CONFIG_EXTCON_ADC_JACK)   += extcon-adc-jack.o
diff --git a/drivers/extcon/extcon-class.c b/drivers/extcon/extcon-class.c
index 76322330cbd7..7ab21aa6eaa1 100644
--- a/drivers/extcon/extcon-class.c
+++ b/drivers/extcon/extcon-class.c
@@ -31,6 +31,7 @@
 #include <linux/extcon.h>
 #include <linux/slab.h>
 #include <linux/sysfs.h>
+#include <linux/of.h>
 
 /*
  * extcon_cable_name suggests the standard cable names for commonly used
@@ -818,6 +819,47 @@ void extcon_dev_unregister(struct extcon_dev *edev)
 }
 EXPORT_SYMBOL_GPL(extcon_dev_unregister);
 
+#ifdef CONFIG_OF
+/*
+ * extcon_get_edev_by_phandle - Get the extcon device from devicetree
+ * @dev - instance to the given device
+ * @index - index into list of extcon_dev
+ *
+ * return the instance of extcon device
+ */
+struct extcon_dev *extcon_get_edev_by_phandle(struct device *dev, int index)
+{
+        struct device_node *node;
+        struct extcon_dev *edev;
+
+        if (!dev->of_node) {
+                dev_err(dev, "device does not have a device node entry\n");
+                return ERR_PTR(-EINVAL);
+        }
+
+        node = of_parse_phandle(dev->of_node, "extcon", index);
+        if (!node) {
+                dev_err(dev, "failed to get phandle in %s node\n",
+                        dev->of_node->full_name);
+                return ERR_PTR(-ENODEV);
+        }
+
+        edev = extcon_get_extcon_dev(node->name);
+        if (!edev) {
+                dev_err(dev, "unable to get extcon device : %s\n", node->name);
+                return ERR_PTR(-ENODEV);
+        }
+
+        return edev;
+}
+#else
+struct extcon_dev *extcon_get_edev_by_phandle(struct device *dev, int index)
+{
+        return ERR_PTR(-ENOSYS);
+}
+#endif /* CONFIG_OF */
+EXPORT_SYMBOL_GPL(extcon_get_edev_by_phandle);
+
 static int __init extcon_class_init(void)
 {
         return create_extcon_class();
diff --git a/drivers/extcon/of_extcon.c b/drivers/extcon/of_extcon.c
deleted file mode 100644
index 0a29f822cf77..000000000000
--- a/drivers/extcon/of_extcon.c
+++ /dev/null
@@ -1,56 +0,0 @@
-/*
- * OF helpers for External connector (extcon) framework
- *
- * Copyright (C) 2013 Texas Instruments, Inc.
- * Kishon Vijay Abraham I <kishon@ti.com>
- *
- * Copyright (C) 2013 Samsung Electronics
- * Chanwoo Choi <cw00.choi@samsung.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- */
-
-#include <linux/module.h>
-#include <linux/slab.h>
-#include <linux/err.h>
-#include <linux/extcon.h>
-#include <linux/of.h>
-#include <linux/of_platform.h>
-#include <linux/extcon/of_extcon.h>
-
-/*
- * of_extcon_get_extcon_dev - Get the name of extcon device from devicetree
- * @dev - instance to the given device
- * @index - index into list of extcon_dev
- *
- * return the instance of extcon device
- */
-struct extcon_dev *of_extcon_get_extcon_dev(struct device *dev, int index)
-{
-        struct device_node *node;
-        struct extcon_dev *edev;
-
-        if (!dev->of_node) {
-                dev_dbg(dev, "device does not have a device node entry\n");
-                return ERR_PTR(-EINVAL);
-        }
-
-        node = of_parse_phandle(dev->of_node, "extcon", index);
-        if (!node) {
-                dev_dbg(dev, "failed to get phandle in %s node\n",
-                        dev->of_node->full_name);
-                return ERR_PTR(-ENODEV);
-        }
-
-        edev = extcon_get_extcon_dev(node->name);
-        if (!edev) {
-                dev_dbg(dev, "unable to get extcon device : %s\n", node->name);
-                return ERR_PTR(-ENODEV);
-        }
-
-        return edev;
-}
-EXPORT_SYMBOL_GPL(of_extcon_get_extcon_dev);
diff --git a/drivers/usb/dwc3/dwc3-omap.c b/drivers/usb/dwc3/dwc3-omap.c
index b269dbd47fc4..b1d7ee6e40b7 100644
--- a/drivers/usb/dwc3/dwc3-omap.c
+++ b/drivers/usb/dwc3/dwc3-omap.c
@@ -29,7 +29,6 @@
 #include <linux/of.h>
 #include <linux/of_platform.h>
 #include <linux/extcon.h>
-#include <linux/extcon/of_extcon.h>
 #include <linux/regulator/consumer.h>
 
 #include <linux/usb/otg.h>
@@ -522,7 +521,7 @@ static int dwc3_omap_probe(struct platform_device *pdev)
         dwc3_omap_enable_irqs(omap);
 
         if (of_property_read_bool(node, "extcon")) {
-                edev = of_extcon_get_extcon_dev(dev, 0);
+                edev = extcon_get_edev_by_phandle(dev, 0);
                 if (IS_ERR(edev)) {
                         dev_vdbg(dev, "couldn't get extcon device\n");
                         ret = -EPROBE_DEFER;
diff --git a/include/linux/extcon.h b/include/linux/extcon.h
index 21c59af1150b..f488145bb2d4 100644
--- a/include/linux/extcon.h
+++ b/include/linux/extcon.h
@@ -240,6 +240,12 @@ extern int extcon_register_notifier(struct extcon_dev *edev,
                                     struct notifier_block *nb);
 extern int extcon_unregister_notifier(struct extcon_dev *edev,
                                       struct notifier_block *nb);
+
+/*
+ * Following API get the extcon device from devicetree.
+ * 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);
 #else /* CONFIG_EXTCON */
 static inline int extcon_dev_register(struct extcon_dev *edev)
 {
@@ -324,5 +330,11 @@ static inline int extcon_unregister_interest(struct extcon_specific_cable_nb
 {
         return 0;
 }
+
+static inline struct extcon_dev *extcon_get_edev_by_phandle(struct device *dev,
+                                                            int index)
+{
+        return ERR_PTR(-ENODEV);
+}
 #endif /* CONFIG_EXTCON */
 #endif /* __LINUX_EXTCON_H__ */
diff --git a/include/linux/extcon/of_extcon.h b/include/linux/extcon/of_extcon.h
deleted file mode 100644
index 0ebfeff1b55d..000000000000
--- a/include/linux/extcon/of_extcon.h
+++ /dev/null
@@ -1,31 +0,0 @@
-/*
- * OF helpers for External connector (extcon) framework
- *
- * Copyright (C) 2013 Texas Instruments, Inc.
- * Kishon Vijay Abraham I <kishon@ti.com>
- *
- * Copyright (C) 2013 Samsung Electronics
- * Chanwoo Choi <cw00.choi@samsung.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- */
-
-#ifndef __LINUX_OF_EXTCON_H
-#define __LINUX_OF_EXTCON_H
-
-#include <linux/err.h>
-
-#if IS_ENABLED(CONFIG_OF_EXTCON)
-extern struct extcon_dev
-        *of_extcon_get_extcon_dev(struct device *dev, int index);
-#else
-static inline struct extcon_dev
-        *of_extcon_get_extcon_dev(struct device *dev, int index)
-{
-        return ERR_PTR(-ENOSYS);
-}
-#endif /* CONFIG_OF_EXTCON */
-#endif /* __LINUX_OF_EXTCON_H */