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-rw-r--r--include/uapi/linux/serial_reg.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/uapi/linux/serial_reg.h b/include/uapi/linux/serial_reg.h
index 5db76880b4ad..be07b5470f4b 100644
--- a/include/uapi/linux/serial_reg.h
+++ b/include/uapi/linux/serial_reg.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-1.0+ WITH Linux-syscall-note */
/*
* include/linux/serial_reg.h
*
@@ -157,6 +158,7 @@
*/
#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)