serial: Consolidate BOTH_EMPTY use

[linux-block.git] / include / linux / serial.h

diff --git a/include/linux/serial.h b/include/linux/serial.h
index 70a9866e4abb8992a40099786930f4c95f8ea909..3d6fe3ef92cf3a2a051ca8c6f7bcd97303a77940 100644 (file)
--- a/include/linux/serial.h
+++ b/include/linux/serial.h
@@ -10,10 +10,19 @@
 #define _LINUX_SERIAL_H
 
 #include <uapi/linux/serial.h>
+#include <uapi/linux/serial_reg.h>
 
 /* Helper for dealing with UART_LCR_WLEN* defines */
 #define UART_LCR_WLEN(x)       ((x) - 5)
 
+/* FIFO and shifting register empty */
+#define UART_LSR_BOTH_EMPTY    (UART_LSR_TEMT | UART_LSR_THRE)
+
+static inline bool uart_lsr_tx_empty(u16 lsr)
+{
+       return (lsr & UART_LSR_BOTH_EMPTY) == UART_LSR_BOTH_EMPTY;
+}
+
 /*
  * Counters of the input lines (CTS, DSR, RI, CD) interrupts
  */