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35 lines
1 KiB
C
35 lines
1 KiB
C
/*
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* Copyright (C) 2012 Synopsys, Inc. (www.synopsys.com)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef _ASM_ARC_SERIAL_H
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#define _ASM_ARC_SERIAL_H
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/*
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* early-8250 requires BASE_BAUD to be defined and includes this header.
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* We put in a typical value:
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* (core clk / 16) - i.e. UART samples 16 times per sec.
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* Athough in multi-platform-image this might not work, specially if the
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* clk driving the UART is different.
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* We can't use DeviceTree as this is typically for early serial.
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*/
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#include <asm/clk.h>
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#define BASE_BAUD (arc_get_core_freq() / 16)
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/*
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* This is definitely going to break early 8250 consoles on multi-platform
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* images but hey, it won't add any code complexity for a debug feature of
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* one broken driver.
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*/
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#ifdef CONFIG_ARC_PLAT_TB10X
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#undef BASE_BAUD
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#define BASE_BAUD (arc_get_core_freq() / 16 / 3)
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#endif
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#endif /* _ASM_ARC_SERIAL_H */
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