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serial: at91: distinguish usart and uart

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Distinguish usart and uart by read ip name register,
The usart read name is "USAR",
The uart and dbgu read name is "DBGU".

Signed-off-by: Elen Song <elen.song@atmel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Elen Song 2013-07-22 16:30:29 +08:00 • committed by Greg Kroah-Hartman
parent 33d64c4ffa
commit 055560b04a
2 changed files with 39 additions and 0 deletions
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2
include/linux/atmel_serial.h
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@ -124,4 +124,6 @@
#define ATMEL_US_NER 0x44 /* Number of Errors Register */
#define ATMEL_US_IF 0x4c /* IrDA Filter Register */
#define ATMEL_US_NAME 0xf0 /* Ip Name */
#endif