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