1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * include/asm-alpha/serial.h 4 */ 5 6 7 /* 8 * This assumes you have a 1.8432 MHz clock for your UART. 9 * 10 * It'd be nice if someone built a serial card with a 24.576 MHz 11 * clock, since the 16550A is capable of handling a top speed of 1.5 12 * megabits/second; but this requires the faster clock. 13 */ 14 #define BASE_BAUD ( 1843200 / 16 ) 15 16 /* Standard COM flags (except for COM4, because of the 8514 problem) */ 17 #ifdef CONFIG_SERIAL_8250_DETECT_IRQ 18 #define STD_COM_FLAGS (UPF_BOOT_AUTOCONF | UPF_SKIP_TEST | UPF_AUTO_IRQ) 19 #define STD_COM4_FLAGS (UPF_BOOT_AUTOCONF | UPF_AUTO_IRQ) 20 #else 21 #define STD_COM_FLAGS (UPF_BOOT_AUTOCONF | UPF_SKIP_TEST) 22 #define STD_COM4_FLAGS UPF_BOOT_AUTOCONF 23 #endif 24 25 #define SERIAL_PORT_DFNS \ 26 /* UART CLK PORT IRQ FLAGS */ \ 27 { 0, BASE_BAUD, 0x3F8, 4, STD_COM_FLAGS }, /* ttyS0 */ \ 28 { 0, BASE_BAUD, 0x2F8, 3, STD_COM_FLAGS }, /* ttyS1 */ \ 29 { 0, BASE_BAUD, 0x3E8, 4, STD_COM_FLAGS }, /* ttyS2 */ \ 30 { 0, BASE_BAUD, 0x2E8, 3, STD_COM4_FLAGS }, /* ttyS3 */ 31