xref: /openbmc/linux/arch/openrisc/include/asm/serial.h (revision 2874c5fd)
1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3  * OpenRISC Linux
4  *
5  * Linux architectural port borrowing liberally from similar works of
6  * others.  All original copyrights apply as per the original source
7  * declaration.
8  *
9  * OpenRISC implementation:
10  * Copyright (C) 2003 Matjaz Breskvar <phoenix@bsemi.com>
11  * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se>
12  * et al.
13  */
14 
15 #ifndef __ASM_OPENRISC_SERIAL_H
16 #define __ASM_OPENRISC_SERIAL_H
17 
18 #ifdef __KERNEL__
19 
20 #include <asm/cpuinfo.h>
21 
22 /* There's a generic version of this file, but it assumes a 1.8MHz UART clk...
23  * this, on the other hand, assumes the UART clock is tied to the system
24  * clock... 8250_early.c (early 8250 serial console) actually uses this, so
25  * it needs to be correct to get the early console working.
26  */
27 
28 #define BASE_BAUD (cpuinfo_or1k[smp_processor_id()].clock_frequency/16)
29 
30 #endif /* __KERNEL__ */
31 
32 #endif /* __ASM_OPENRISC_SERIAL_H */
33