linux-stable/include/linux/apple-gmux.h
Thomas Gleixner caab277b1d treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234
Based on 1 normalized pattern(s):

  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 this program is
  distributed in the hope that it will be useful but without any
  warranty without even the implied warranty of merchantability or
  fitness for a particular purpose see the gnu general public license
  for more details you should have received a copy of the gnu general
  public license along with this program if not see http www gnu org
  licenses

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-only

has been chosen to replace the boilerplate/reference in 503 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Alexios Zavras <alexios.zavras@intel.com>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Enrico Weigelt <info@metux.net>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190602204653.811534538@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-06-19 17:09:07 +02:00

39 lines
918 B
C

/* SPDX-License-Identifier: GPL-2.0-only */
/*
* apple-gmux.h - microcontroller built into dual GPU MacBook Pro & Mac Pro
* Copyright (C) 2015 Lukas Wunner <lukas@wunner.de>
*/
#ifndef LINUX_APPLE_GMUX_H
#define LINUX_APPLE_GMUX_H
#include <linux/acpi.h>
#define GMUX_ACPI_HID "APP000B"
#if IS_ENABLED(CONFIG_APPLE_GMUX)
/**
* apple_gmux_present() - detect if gmux is built into the machine
*
* Drivers may use this to activate quirks specific to dual GPU MacBook Pros
* and Mac Pros, e.g. for deferred probing, runtime pm and backlight.
*
* Return: %true if gmux is present and the kernel was configured
* with CONFIG_APPLE_GMUX, %false otherwise.
*/
static inline bool apple_gmux_present(void)
{
return acpi_dev_found(GMUX_ACPI_HID);
}
#else /* !CONFIG_APPLE_GMUX */
static inline bool apple_gmux_present(void)
{
return false;
}
#endif /* !CONFIG_APPLE_GMUX */
#endif /* LINUX_APPLE_GMUX_H */