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| author | Vineet Gupta <vgupta@synopsys.com> | 2013-01-23 17:24:17 +0530 |
|---|---|---|
| committer | Vineet Gupta <vgupta@synopsys.com> | 2013-02-15 23:16:18 +0530 |
| commit | 0208c96a9df98999dd150430b37983e9a003ea0a (patch) | |
| tree | 57a8847060fa428d8a0617ffb1d2752a17b70787 /arch/arc | |
| parent | 95461a64e9bf8dae80c0309a6dd90c3872548129 (diff) | |
| download | lwn-0208c96a9df98999dd150430b37983e9a003ea0a.tar.gz lwn-0208c96a9df98999dd150430b37983e9a003ea0a.zip | |
ARC: Provide a default serial.h for uart drivers needing BASE_BAUD
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Diffstat (limited to 'arch/arc')
| -rw-r--r-- | arch/arc/include/asm/serial.h | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/arch/arc/include/asm/serial.h b/arch/arc/include/asm/serial.h new file mode 100644 index 000000000000..4dff5a1e4128 --- /dev/null +++ b/arch/arc/include/asm/serial.h @@ -0,0 +1,25 @@ +/* + * 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 */ |