456305ec59
This mailbox driver provides a communication channel with the Apple IOP controllers found on Apple SoCs. These IOP controllers are used to implement various functions such as the System Manegement Controller (SMC) and NVMe storage. It allows sending and receiving a 96-bit message over a single channel. The header file with the struct used for mailbox messages is taken straight from Linux. Signed-off-by: Mark Kettenis <kettenis@openbsd.org> Signed-off-by: Sven Peter <sven@svenpeter.dev> Reviewed-by: Simon Glass <sjg@chromium.org> Tested on: Macbook Air M1 Tested-by: Simon Glass <sjg@chromium.org>
20 lines
359 B
C
20 lines
359 B
C
/* SPDX-License-Identifier: GPL-2.0-only OR MIT */
|
|
/*
|
|
* Apple mailbox message format
|
|
*
|
|
* Copyright (C) 2021 The Asahi Linux Contributors
|
|
*/
|
|
|
|
#ifndef _LINUX_APPLE_MAILBOX_H_
|
|
#define _LINUX_APPLE_MAILBOX_H_
|
|
|
|
#include <linux/types.h>
|
|
|
|
/* encodes a single 96bit message sent over the single channel */
|
|
struct apple_mbox_msg {
|
|
u64 msg0;
|
|
u32 msg1;
|
|
};
|
|
|
|
#endif
|