extcon: Add an API to get extcon device from dt node (6eee5b3b) · Commits · 戴 / test

drivers/extcon/Kconfig

+4 −0

Original line number	Diff line number	Diff line
		@@ -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

drivers/extcon/Makefile

+2 −0

Original line number	Diff line number	Diff line
		@@ -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

drivers/extcon/extcon-class.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -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];

drivers/extcon/of_extcon.c

0 → 100644

+64 −0

Original line number	Diff line number	Diff line
		/*
		* 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);

include/linux/extcon/of_extcon.h

0 → 100644

+31 −0

Original line number	Diff line number	Diff line
		/*
		* 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 */

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