ffb7fcd66f
8250 earlycon is broken on multi-platform ARC because the UART clk value (BASE_BAUD) is fixed at build time. Instead, determine the appropriate UART clk at runtime; parse the devicetree early for platforms requiring alternate UART clk values (currently only the TB10X platform). Cc: Jiri Slaby <jslaby@suse.cz> Cc: linux-serial@vger.kernel.org Cc: linux-kernel@vger.kernel.org Cc: Rob Herring <robh@kernel.org> Cc: Arnd Bergmann <arnd@arndb.de> Reviewed-by: Peter Hurley <peter@hurleysoftware.com> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
23 lines
644 B
C
23 lines
644 B
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 (now earlycon) requires BASE_BAUD to be defined in this header.
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* However to still determine it dynamically (for multi-platform images)
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* we do this in a helper by parsing the FDT early
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*/
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extern unsigned int __init arc_early_base_baud(void);
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#define BASE_BAUD arc_early_base_baud()
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#endif /* _ASM_ARC_SERIAL_H */
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