diff options
| author | Ilpo Järvinen <ilpo.jarvinen@linux.intel.com> | 2022-06-24 23:54:24 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-06-27 14:41:31 +0200 |
| commit | 34619de1b8cb52afa90bbeb3b4fbad34c28f19cf (patch) | |
| tree | 1e58b35ab75d393d556f2ee9f1a0e01e763eab83 /include/linux/serial.h | |
| parent | eb47b59afb7e46c952d7b03884245364990d4910 (diff) | |
serial: Consolidate BOTH_EMPTY use
Per file BOTH_EMPTY defines are littering our source code here and
there. Define once in serial.h and create helper for the check
too.
Reviewed-by: Jiri Slaby <jirislaby@kernel.org>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://lore.kernel.org/r/20220624205424.12686-7-ilpo.jarvinen@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/serial.h')
| -rw-r--r-- | include/linux/serial.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/include/linux/serial.h b/include/linux/serial.h index 70a9866e4abb..3d6fe3ef92cf 100644 --- 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 */ |