1 /* 2 * Copyright (C) 2012 Synopsys, Inc. (www.synopsys.com) 3 * 4 * This program is free software; you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License version 2 as 6 * published by the Free Software Foundation. 7 */ 8 9 #ifndef _ASM_ARC_SERIAL_H 10 #define _ASM_ARC_SERIAL_H 11 12 /* 13 * early-8250 requires BASE_BAUD to be defined and includes this header. 14 * We put in a typical value: 15 * (core clk / 16) - i.e. UART samples 16 times per sec. 16 * Athough in multi-platform-image this might not work, specially if the 17 * clk driving the UART is different. 18 * We can't use DeviceTree as this is typically for early serial. 19 */ 20 21 #include <asm/clk.h> 22 23 #define BASE_BAUD (arc_get_core_freq() / 16) 24 25 /* 26 * This is definitely going to break early 8250 consoles on multi-platform 27 * images but hey, it won't add any code complexity for a debug feature of 28 * one broken driver. 29 */ 30 #ifdef CONFIG_ARC_PLAT_TB10X 31 #undef BASE_BAUD 32 #define BASE_BAUD (arc_get_core_freq() / 16 / 3) 33 #endif 34 35 #endif /* _ASM_ARC_SERIAL_H */ 36