(sf & SYSC_HAS_CLOCKACTIVITY))
_set_clockactivity(oh, oh->class->sysc->clockact, &v);
- _write_sysconfig(v, oh);
+ /* If the cached value is the same as the new value, skip the write */
+ if (oh->_sysc_cache != v)
+ _write_sysconfig(v, oh);
/*
* Set the autoidle bit only after setting the smartidle bit