arch/alpha/include/asm/serial.h

   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 */