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serial: Add define for max baud rate divisor

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Add a define for the maximum baud rate divisor, to improve code
readability.

Signed-off-by: Ed Blake <ed.blake@sondrel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Ed Blake
2017-09-26 11:40:02 +01:00
committed by Greg Kroah-Hartman
parent 7464779fa8
commit 6263368c5b
4 changed files with 5 additions and 4 deletions
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1
include/uapi/linux/serial_reg.h
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@@ -157,6 +157,7 @@
*/
#define UART_DLL 0 /* Out: Divisor Latch Low */
#define UART_DLM 1 /* Out: Divisor Latch High */
#define UART_DIV_MAX 0xFFFF /* Max divisor value */
/*
* LCR=0xBF (or DLAB=1 for 16C660)