/* Returns: the silicon revision of the cpu -EINVAL - not a mx27  */
int mx27_revision(void)
/* Returns: the silicon revision of the cpu -EINVAL - not a mx27  */
int mx27_revision(void)
{
	if (cpu_silicon_rev == -1)
		query_silicon_parameter();
	if (cpu_partnumber != 0x8821)
		return -EINVAL;
	return cpu_silicon_rev;
}