projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| caab277b | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
| 2413306c LW |
2 | /* |
| 3 | * apple-gmux.h - microcontroller built into dual GPU MacBook Pro & Mac Pro | |
| 4 | * Copyright (C) 2015 Lukas Wunner <lukas@wunner.de> | |
| 2413306c LW |
5 | */ |
| 6 | ||
| 7 | #ifndef LINUX_APPLE_GMUX_H | |
| 8 | #define LINUX_APPLE_GMUX_H | |
| 9 | ||
| 10 | #include <linux/acpi.h> | |
| 11 | ||
| 12 | #define GMUX_ACPI_HID "APP000B" | |
| 13 | ||
| b7172119 LW |
14 | #if IS_ENABLED(CONFIG_APPLE_GMUX) |
| 15 | ||
| 2413306c LW |
16 | /** |
| 17 | * apple_gmux_present() - detect if gmux is built into the machine | |
| 18 | * | |
| 19 | * Drivers may use this to activate quirks specific to dual GPU MacBook Pros | |
| 20 | * and Mac Pros, e.g. for deferred probing, runtime pm and backlight. | |
| 21 | * | |
| 22 | * Return: %true if gmux is present and the kernel was configured | |
| 23 | * with CONFIG_APPLE_GMUX, %false otherwise. | |
| 24 | */ | |
| 25 | static inline bool apple_gmux_present(void) | |
| 26 | { | |
| c68ae33e | 27 | return acpi_dev_found(GMUX_ACPI_HID); |
| 2413306c LW |
28 | } |
| 29 | ||
| b7172119 LW |
30 | #else /* !CONFIG_APPLE_GMUX */ |
| 31 | ||
| 32 | static inline bool apple_gmux_present(void) | |
| 33 | { | |
| 34 | return false; | |
| 35 | } | |
| 36 | ||
| 37 | #endif /* !CONFIG_APPLE_GMUX */ | |
| 38 | ||
| 2413306c | 39 | #endif /* LINUX_APPLE_GMUX_H */ |