Release 4.14 arch/x86/include/asm/serial.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_X86_SERIAL_H

#define _ASM_X86_SERIAL_H

/*
 * This assumes you have a 1.8432 MHz clock for your UART.
 *
 * It'd be nice if someone built a serial card with a 24.576 MHz
 * clock, since the 16550A is capable of handling a top speed of 1.5
 * megabits/second; but this requires a faster clock.
 */

#define BASE_BAUD (1843200/16)

/* Standard COM flags (except for COM4, because of the 8514 problem) */
#ifdef CONFIG_SERIAL_8250_DETECT_IRQ

# define STD_COMX_FLAGS	(UPF_BOOT_AUTOCONF |    UPF_SKIP_TEST   | UPF_AUTO_IRQ)

# define STD_COM4_FLAGS	(UPF_BOOT_AUTOCONF |    0               | UPF_AUTO_IRQ)
#else

# define STD_COMX_FLAGS	(UPF_BOOT_AUTOCONF |    UPF_SKIP_TEST   | 0             )

# define STD_COM4_FLAGS	(UPF_BOOT_AUTOCONF |    0               | 0             )
#endif


#define SERIAL_PORT_DFNS								\
	/* UART         CLK             PORT    IRQ     FLAGS                       */	\
	{ .uart = 0,    BASE_BAUD,      0x3F8,  4,      STD_COMX_FLAGS  }, /* ttyS0 */	\
        { .uart = 0,    BASE_BAUD,      0x2F8,  3,      STD_COMX_FLAGS  }, /* ttyS1 */	\
        { .uart = 0,    BASE_BAUD,      0x3E8,  4,      STD_COMX_FLAGS  }, /* ttyS2 */	\
        { .uart = 0,    BASE_BAUD,      0x2E8,  3,      STD_COM4_FLAGS  }, /* ttyS3 */

#endif /* _ASM_X86_SERIAL_H */
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Directory: arch/x86/include/asm

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