From 1ad94ffef22c0a6e2ee6ba90a800c32fd29ffa1f Mon Sep 17 00:00:00 2001 From: Chanwoo Choi Date: Tue, 18 Mar 2014 19:55:46 +0900 Subject: 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 Acked-by: Felipe Balbi --- drivers/extcon/extcon-class.c | 42 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 42 insertions(+) (limited to 'drivers/extcon/extcon-class.c') 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 #include #include +#include /* * 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(); -- cgit v1.2.3