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extcon: Add an API to get extcon device from dt node

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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 <kishon@ti.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Myungjoo Ham <myungjoo.ham@samsung.com>
This commit is contained in:
Kishon Vijay Abraham I 2013-06-11 20:48:02 +09:00 committed by Chanwoo Choi
parent 5ae90d8e46
commit 6eee5b3b49
5 changed files with 103 additions and 1 deletions
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4
drivers/extcon/Kconfig
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@ -14,6 +14,10 @@ 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

2
drivers/extcon/Makefile
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@ -2,6 +2,8 @@
# 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

3
drivers/extcon/extcon-class.c
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@ -602,7 +602,8 @@ int extcon_dev_register(struct extcon_dev *edev, struct device *dev)
edev->dev->class = extcon_class;
edev->dev->release = extcon_dev_release;
dev_set_name(edev->dev, "%s", edev->name ? edev->name : dev_name(dev));
edev->name = edev->name ? edev->name : dev_name(dev);
dev_set_name(edev->dev, "%s", edev->name);
if (edev->max_supported) {
char buf[10];

64
drivers/extcon/of_extcon.c Normal file
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@ -0,0 +1,64 @@
/*
* 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;
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);
}
edev = extcon_get_extcon_dev(dev_name(&extcon_parent_dev->dev));
if (!edev) {
dev_dbg(dev, "unable to get extcon device : %s\n",
dev_name(&extcon_parent_dev->dev));
return ERR_PTR(-ENODEV);
}
return edev;
}
EXPORT_SYMBOL_GPL(of_extcon_get_extcon_dev);

31
include/linux/extcon/of_extcon.h Normal file
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@ -0,0 +1,31 @@
/*
* 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 */