ARC: Dynamically determine BASE_BAUD from DeviceTree

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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>

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This commit is contained in:

Vineet Gupta 2014-10-28 15:04:05 +05:30

parent 7bf6df575f

commit ffb7fcd66f

2 changed files with 29 additions and 18 deletions

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23

arch/arc/include/asm/serial.h

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24

arch/arc/kernel/devtree.c

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