drivers: power: report battery voltage in AOSP compatible format

[GitHub/mt8127/android_kernel_alcatel_ttab.git] / kernel / hrtimer.c

diff --git a/kernel/hrtimer.c b/kernel/hrtimer.c
index fd4b13b131f8db23fb17055caf5d33e23bec7b50..03c39c893f67dc82059652a3fe405eba3fa62b57 100644 (file)
--- a/kernel/hrtimer.c
+++ b/kernel/hrtimer.c
@@ -47,11 +47,15 @@
 #include <linux/sched/sysctl.h>
 #include <linux/sched/rt.h>
 #include <linux/timer.h>
+#include <linux/freezer.h>
 
 #include <asm/uaccess.h>
 
 #include <trace/events/timer.h>
 
+#include <linux/mt_sched_mon.h>
+
+//#define MTK_HRTIME_DEBUG     /*MTK debug func*/
 /*
  * The timer bases:
  *
@@ -245,6 +249,11 @@ again:
                        goto again;
                }
                timer->base = new_base;
+       } else {
+               if (cpu != this_cpu && hrtimer_check_target(timer, new_base)) {
+                       cpu = this_cpu;
+                       goto again;
+               }
        }
        return new_base;
 }
@@ -580,6 +589,23 @@ hrtimer_force_reprogram(struct hrtimer_cpu_base *cpu_base, int skip_equal)
 
        cpu_base->expires_next.tv64 = expires_next.tv64;
 
+       /*
+        * If a hang was detected in the last timer interrupt then we
+        * leave the hang delay active in the hardware. We want the
+        * system to make progress. That also prevents the following
+        * scenario:
+        * T1 expires 50ms from now
+        * T2 expires 5s from now
+        *
+        * T1 is removed, so this code is called and would reprogram
+        * the hardware to 5s from now. Any hrtimer_start after that
+        * will not reprogram the hardware due to hang_detected being
+        * set. So we'd effectivly block all timers until the T2 event
+        * fires.
+        */
+       if (cpu_base->hang_detected)
+               return;
+
        if (cpu_base->expires_next.tv64 != KTIME_MAX)
                tick_program_event(cpu_base->expires_next, 1);
 }
@@ -721,17 +747,20 @@ static int hrtimer_switch_to_hres(void)
        return 1;
 }
 
+static void clock_was_set_work(struct work_struct *work)
+{
+       clock_was_set();
+}
+
+static DECLARE_WORK(hrtimer_work, clock_was_set_work);
+
 /*
- * Called from timekeeping code to reprogramm the hrtimer interrupt
- * device. If called from the timer interrupt context we defer it to
- * softirq context.
+ * Called from timekeeping and resume code to reprogramm the hrtimer
+ * interrupt device on all cpus.
  */
 void clock_was_set_delayed(void)
 {
-       struct hrtimer_cpu_base *cpu_base = &__get_cpu_var(hrtimer_bases);
-
-       cpu_base->clock_was_set = 1;
-       __raise_softirq_irqoff(HRTIMER_SOFTIRQ);
+       schedule_work(&hrtimer_work);
 }
 
 #else
@@ -780,8 +809,10 @@ void hrtimers_resume(void)
        WARN_ONCE(!irqs_disabled(),
                  KERN_INFO "hrtimers_resume() called with IRQs enabled!");
 
+       /* Retrigger on the local CPU */
        retrigger_next_event(NULL);
-       timerfd_clock_was_set();
+       /* And schedule a retrigger for all others */
+       clock_was_set_delayed();
 }
 
 static inline void timer_stats_hrtimer_set_start_info(struct hrtimer *timer)
@@ -966,17 +997,19 @@ int __hrtimer_start_range_ns(struct hrtimer *timer, ktime_t tim,
        struct hrtimer_clock_base *base, *new_base;
        unsigned long flags;
        int ret, leftmost;
-
+    /*add MTK debug log for ALPS01804694*/
+    if(timer->function == NULL) {
+               pr_alert("add hrtimer but do nothing");
+               dump_stack();
+    }
+       
        base = lock_hrtimer_base(timer, &flags);
 
        /* Remove an active timer from the queue: */
        ret = remove_hrtimer(timer, base);
 
-       /* Switch the timer base, if necessary: */
-       new_base = switch_hrtimer_base(timer, base, mode & HRTIMER_MODE_PINNED);
-
        if (mode & HRTIMER_MODE_REL) {
-               tim = ktime_add_safe(tim, new_base->get_time());
+               tim = ktime_add_safe(tim, base->get_time());
                /*
                 * CONFIG_TIME_LOW_RES is a temporary way for architectures
                 * to signal that they simply return xtime in
@@ -991,6 +1024,9 @@ int __hrtimer_start_range_ns(struct hrtimer *timer, ktime_t tim,
 
        hrtimer_set_expires_range_ns(timer, tim, delta_ns);
 
+       /* Switch the timer base, if necessary: */
+       new_base = switch_hrtimer_base(timer, base, mode & HRTIMER_MODE_PINNED);
+
        timer_stats_hrtimer_set_start_info(timer);
 
        leftmost = enqueue_hrtimer(timer, new_base);
@@ -1225,6 +1261,31 @@ int hrtimer_get_res(const clockid_t which_clock, struct timespec *tp)
 }
 EXPORT_SYMBOL_GPL(hrtimer_get_res);
 
+#ifdef MTK_HRTIME_DEBUG
+static void dump_hrtimer_callinfo(struct hrtimer *timer)
+{
+
+  char symname[KSYM_NAME_LEN];
+  if (lookup_symbol_name((unsigned long)(timer->function), symname) < 0) {
+  pr_err("timer info1: state/%lx, func/%pK\n",
+  timer->state, timer->function);
+  } else {
+  pr_err("timer info2: state/%lx, func/%s\n",
+  timer->state, symname);
+  }
+ 
+  #ifdef CONFIG_TIMER_STATS
+  if (lookup_symbol_name((unsigned long)(timer->start_site),
+  symname) < 0) {
+  pr_err("timer stats1: pid/%d(%s), site/%pK\n",
+  timer->start_pid, timer->start_comm, timer->start_site);
+  } else {
+  pr_err("timer stats2: pid/%d(%s), site/%s\n",
+  timer->start_pid, timer->start_comm, symname);
+  }
+  #endif
+}
+#endif
 static void __run_hrtimer(struct hrtimer *timer, ktime_t *now)
 {
        struct hrtimer_clock_base *base = timer->base;
@@ -1246,7 +1307,10 @@ static void __run_hrtimer(struct hrtimer *timer, ktime_t *now)
         */
        raw_spin_unlock(&cpu_base->lock);
        trace_hrtimer_expire_entry(timer, now);
+
+       mt_trace_hrt_start(fn);
        restart = fn(timer);
+       mt_trace_hrt_end(fn);
        trace_hrtimer_expire_exit(timer);
        raw_spin_lock(&cpu_base->lock);
 
@@ -1432,13 +1496,6 @@ void hrtimer_peek_ahead_timers(void)
 
 static void run_hrtimer_softirq(struct softirq_action *h)
 {
-       struct hrtimer_cpu_base *cpu_base = &__get_cpu_var(hrtimer_bases);
-
-       if (cpu_base->clock_was_set) {
-               cpu_base->clock_was_set = 0;
-               clock_was_set();
-       }
-
        hrtimer_peek_ahead_timers();
 }
 
@@ -1545,7 +1602,7 @@ static int __sched do_nanosleep(struct hrtimer_sleeper *t, enum hrtimer_mode mod
                        t->task = NULL;
 
                if (likely(t->task))
-                       schedule();
+                       freezable_schedule();
 
                hrtimer_cancel(&t->timer);
                mode = HRTIMER_MODE_ABS;