/usr/src/linux-headers-5.15.0-190/arch/parisc/include/asm
Edit: /usr/src/linux-headers-5.15.0-190/arch/parisc/include/asm/serial.h (124B)
/*
* include/asm-parisc/serial.h
*/
/*
* This is used for 16550-compatible UARTs
*/
#define BASE_BAUD ( 1843200 / 16 )