mc_suspend
void (*mc_suspend)(void);
mc_suspend = (void (*)(void))
if (mc_suspend == NULL || mc_resume == NULL) {
(*mc_suspend)();
(void) mc_suspend(mcp, MC_SOFT_SUSPENDED);
rv = mc_suspend(mcp, MC_DRIVER_SUSPENDED);
static int mc_suspend(mc_opl_t *mcp, uint32_t flag);