tegrakernel/kernel/kernel-4.9/arch/m68k/sun3/leds.c

#include <asm/contregs.h>
#include <asm/sun3mmu.h>
#include <asm/io.h>

void sun3_leds(unsigned char byte)
{
	unsigned char dfc;

	GET_DFC(dfc);
	SET_DFC(FC_CONTROL);
	SET_CONTROL_BYTE(AC_LEDS, byte);
	SET_DFC(dfc);
}