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ARC: Provide a default serial.h for uart drivers needing BASE_BAUD

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Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
This commit is contained in:
Vineet Gupta 2013-01-23 17:24:17 +05:30
parent 95461a64e9
commit 0208c96a9d
1 changed files with 25 additions and 0 deletions
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arch/arc/include/asm/serial.h Normal file
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/*
* Copyright (C) 2012 Synopsys, Inc. (www.synopsys.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef _ASM_ARC_SERIAL_H
#define _ASM_ARC_SERIAL_H
/*
* early-8250 requires BASE_BAUD to be defined and includes this header.
* We put in a typical value:
* (core clk / 16) - i.e. UART samples 16 times per sec.
* Athough in multi-platform-image this might not work, specially if the
* clk driving the UART is different.
* We can't use DeviceTree as this is typically for early serial.
*/
#include <asm/clk.h>
#define BASE_BAUD (arc_get_core_freq() / 16)
#endif /* _ASM_ARC_SERIAL_H */