CLK_SLOW_OFFSET
#define CLK_SLOW_SYS_CTRL (CLK_SLOW_OFFSET + 0x00)
#define CLK_SLOW_SYS_DIV_INT (CLK_SLOW_OFFSET + 0x04)
#define CLK_SLOW_SYS_SEL (CLK_SLOW_OFFSET + 0x0c)