Current File : //usr/src/kernels/3.10.0-957.21.3.el7.centos.plus.x86_64/include/linux/fwnode.h
/*
* fwnode.h - Firmware device node object handle type definition.
*
* Copyright (C) 2015, Intel Corporation
* Author: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef _LINUX_FWNODE_H_
#define _LINUX_FWNODE_H_
#include <linux/device.h>
enum fwnode_type {
FWNODE_INVALID = 0,
FWNODE_OF,
FWNODE_ACPI,
FWNODE_ACPI_DATA,
FWNODE_PDATA,
};
struct fwnode_handle {
enum fwnode_type type;
struct fwnode_handle *secondary;
};
/*
* Prior to this code being introduced, device_rh was allocated in
* device_add(). This seemed correct as there were no users of the elements of
* device_rh prior to the device_add. This is no longer true with the addition
* of the fwnode code. The functions below will check and WARN loudly on
* uses of device_rh prior to it being initialized. These warnings are
* Red Hat bugs and should be filed against RHEL7.
*/
static inline struct fwnode_handle *get_rh_dev_fwnode(struct device *device)
{
if (!device->device_rh) {
WARN(1, "device_rh is not allocated on get ... fixing\n");
device_rh_alloc(device);
}
return device->device_rh->fwnode;
}
static inline void set_rh_dev_fwnode(struct device *device,
struct fwnode_handle *fwnode)
{
if (!device->device_rh) {
WARN(1, "device_rh is not allocated on set ... fixing\n");
device_rh_alloc(device);
}
device->device_rh->fwnode = fwnode;
}
#endif
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