diff options
Diffstat (limited to 'include/linux/serial.h')
| -rw-r--r-- | include/linux/serial.h | 15 |
1 files changed, 9 insertions, 6 deletions
diff --git a/include/linux/serial.h b/include/linux/serial.h index 0b8b7d7c8f33..3d6fe3ef92cf 100644 --- a/include/linux/serial.h +++ b/include/linux/serial.h @@ -9,12 +9,20 @@ #ifndef _LINUX_SERIAL_H #define _LINUX_SERIAL_H -#include <asm/page.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 */ @@ -25,11 +33,6 @@ struct async_icount { __u32 buf_overrun; }; -/* - * The size of the serial xmit buffer is 1 page, or 4096 bytes - */ -#define SERIAL_XMIT_SIZE PAGE_SIZE - #include <linux/compiler.h> #endif /* _LINUX_SERIAL_H */ |