Thermtrip test program

thermtrip_test.c

#include <sys/mman.h>
#include <fcntl.h>
#include <stdio.h>

#define SOCTHERM_ADDR 0x700e2000
#define THERMTRIP_OFFS 0x80

int main() {
        int mem_fd;
        unsigned char *mem;
        unsigned long val;
        
        mem_fd = open("/dev/mem", O_RDWR | O_SYNC);
        if (mem_fd < 0) {
                printf("Failed to open mem_fd\n");
                return 1;
        }
        
        mem = mmap(NULL, 0x1000, PROT_READ|PROT_WRITE, MAP_SHARED,
                   mem_fd, SOCTHERM_ADDR);
        if (mem < 0) {
                printf("Failed to mmap mem\n");
                return 1;
        }
        
        val = *(unsigned long *)(mem + THERMTRIP_OFFS);

        /* set trip temp to 0 */
        val &= ~0xff;
        
        *(unsigned long*)(mem + THERMTRIP_OFFS) = val;
        
        return 0;
}