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34619de1b8
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>
38 lines
836 B
C
38 lines
836 B
C
/*
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* include/linux/serial.h
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*
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* Copyright (C) 1992 by Theodore Ts'o.
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*
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* Redistribution of this file is permitted under the terms of the GNU
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* Public License (GPL)
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*/
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#ifndef _LINUX_SERIAL_H
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#define _LINUX_SERIAL_H
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#include <uapi/linux/serial.h>
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#include <uapi/linux/serial_reg.h>
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/* Helper for dealing with UART_LCR_WLEN* defines */
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#define UART_LCR_WLEN(x) ((x) - 5)
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/* FIFO and shifting register empty */
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#define UART_LSR_BOTH_EMPTY (UART_LSR_TEMT | UART_LSR_THRE)
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static inline bool uart_lsr_tx_empty(u16 lsr)
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{
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return (lsr & UART_LSR_BOTH_EMPTY) == UART_LSR_BOTH_EMPTY;
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}
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/*
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* Counters of the input lines (CTS, DSR, RI, CD) interrupts
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*/
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struct async_icount {
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__u32 cts, dsr, rng, dcd, tx, rx;
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__u32 frame, parity, overrun, brk;
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__u32 buf_overrun;
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};
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#include <linux/compiler.h>
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#endif /* _LINUX_SERIAL_H */
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