- /* Get the event scan rate for the rtas so we know how
- * often it expects a heartbeat. -- Cort
- */
- device = of_find_node_by_name(NULL, "rtas");
- if (device)
- p = of_get_property(device, "rtas-event-scan-rate", NULL);
- if (p && *p) {
- /*
- * Arrange to call chrp_event_scan at least *p times
- * per minute. We use 59 rather than 60 here so that
- * the rate will be slightly higher than the minimum.
- * This all assumes we don't do hotplug CPU on any
- * machine that needs the event scans done.
- */
- unsigned long interval, offset;
- int cpu, ncpus;
- struct timer_list *timer;
-
- interval = HZ * 59 / *p;
- offset = HZ;
- ncpus = num_online_cpus();
- event_scan_interval = ncpus * interval;
- for (cpu = 0; cpu < ncpus; ++cpu) {
- timer = &per_cpu(heartbeat_timer, cpu);
- setup_timer(timer, chrp_event_scan, 0);
- timer->expires = jiffies + offset;
- add_timer_on(timer, cpu);
- offset += interval;
- }
- printk("RTAS Event Scan Rate: %u (%lu jiffies)\n",
- *p, interval);
- }
- of_node_put(device);
-