xref: /OK3568_Linux_fs/kernel/include/soc/rockchip/rockchip-mailbox.h (revision 4882a59341e53eb6f0b4789bf948001014eff981) 
1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun  * Copyright (C) 2022 Rockchip Electronics Co., Ltd
4*4882a593Smuzhiyun  */
5*4882a593Smuzhiyun 
6*4882a593Smuzhiyun #ifndef __SOC_ROCKCHIP_MAILBOX_H__
7*4882a593Smuzhiyun #define __SOC_ROCKCHIP_MAILBOX_H__
8*4882a593Smuzhiyun 
9*4882a593Smuzhiyun #include <linux/errno.h>
10*4882a593Smuzhiyun #include <linux/types.h>
11*4882a593Smuzhiyun 
12*4882a593Smuzhiyun struct mbox_chan;
13*4882a593Smuzhiyun 
14*4882a593Smuzhiyun struct rockchip_mbox_msg {
15*4882a593Smuzhiyun 	u32 cmd;
16*4882a593Smuzhiyun 	u32 data;
17*4882a593Smuzhiyun };
18*4882a593Smuzhiyun 
19*4882a593Smuzhiyun #if IS_REACHABLE(CONFIG_ROCKCHIP_MBOX)
20*4882a593Smuzhiyun int rockchip_mbox_read_msg(struct mbox_chan *chan,
21*4882a593Smuzhiyun 			   struct rockchip_mbox_msg *msg);
22*4882a593Smuzhiyun #else
rockchip_mbox_read_msg(struct mbox_chan * chan,struct rockchip_mbox_msg * msg)23*4882a593Smuzhiyun static inline int rockchip_mbox_read_msg(struct mbox_chan *chan,
24*4882a593Smuzhiyun 					 struct rockchip_mbox_msg *msg)
25*4882a593Smuzhiyun {
26*4882a593Smuzhiyun 	return -EOPNOTSUPP;
27*4882a593Smuzhiyun }
28*4882a593Smuzhiyun #endif
29*4882a593Smuzhiyun 
30*4882a593Smuzhiyun #endif /* __SOC_ROCKCHIP_MAILBOX_H__ */
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