Added an API of_extcon_get_extcon_dev() to be used by drivers to get
extcon device in the case of dt boot (this can be used instead of
extcon_get_extcon_dev()).
Signed-off-by: Kishon Vijay Abraham I <kis...@ti.com>
---
drivers/extcon/extcon-class.c | 40 ++++++++++++++++++++++++++++++++++++++++
include/linux/extcon.h | 8 ++++++++
2 files changed, 48 insertions(+)
diff --git a/drivers/extcon/extcon-class.c b/drivers/extcon/extcon-class.c
index 60adc04..265d549 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_platform.h>
/*
* extcon_cable_name suggests the standard cable names for commonly used
@@ -392,6 +393,45 @@ int extcon_set_cable_state(struct extcon_dev *edev,
}
EXPORT_SYMBOL_GPL(extcon_set_cable_state);
+struct extcon_dev *of_extcon_get_extcon_dev(struct device *dev, int index)
+{
+ struct class_dev_iter iter;
+ struct device *extcon_dev;
+ struct device_node *node;
+ struct platform_device *extcon_parent_dev;
+
+ 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);
+ }
+
+ extcon_parent_dev = of_find_device_by_node(node);
+ if (!extcon_parent_dev) {
+ dev_dbg(dev, "unable to find device by node\n");
+ return ERR_PTR(-EPROBE_DEFER);
+ }
+
+ class_dev_iter_init(&iter, extcon_class, NULL, NULL);
+ while ((extcon_dev = class_dev_iter_next(&iter))) {
+ if (extcon_dev->parent != &extcon_parent_dev->dev)
+ continue;
+
+ class_dev_iter_exit(&iter);
+ return dev_get_drvdata(extcon_dev);
+ }
+
+ class_dev_iter_exit(&iter);
+ return ERR_PTR(-ENODEV);
+}
+EXPORT_SYMBOL_GPL(of_extcon_get_extcon_dev);
+
/**
* extcon_get_extcon_dev() - Get the extcon device instance from the name
* @extcon_name: The extcon name provided with extcon_dev_register()
diff --git a/include/linux/extcon.h b/include/linux/extcon.h
index fcb51c8..3858bb9 100644
--- a/include/linux/extcon.h
+++ b/include/linux/extcon.h
@@ -182,6 +182,8 @@ struct extcon_specific_cable_nb {
*/
extern int extcon_dev_register(struct extcon_dev *edev, struct device *dev);
extern void extcon_dev_unregister(struct extcon_dev *edev);
+extern struct extcon_dev *of_extcon_get_extcon_dev(struct device *dev,
+ int index);
extern struct extcon_dev *extcon_get_extcon_dev(const char *extcon_name);
/*
@@ -292,6 +294,12 @@ static inline int extcon_set_cable_state(struct extcon_dev
*edev,
return 0;
}
+static inline struct extcon_dev *of_extcon_get_extcon_dev(struct device *dev,
+ int index)
+{
+ return NULL;
+}
+
static inline struct extcon_dev *extcon_get_extcon_dev(const char *extcon_name)
{
return NULL;
--
1.7.10.4
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