From: Thomas Cort <tcort@minix3.org>
Date: Fri, 2 Aug 2013 14:10:59 +0000 (-0400)
Subject: pm: notify readclock of reboot(RBT_POWEROFF)
X-Git-Tag: v3.3.0~871
X-Git-Url: http://zhaoyanbai.com/repos/?a=commitdiff_plain;h=1b95bbbfe97796bc3ce61a9152082c1b32521485;p=minix.git

pm: notify readclock of reboot(RBT_POWEROFF)

Some ARM chips handle power-off with RTC alarms. PM notifies
readclock (the driver for RTCs) about the impending power-off.
If the power-off mechanism is an RTC alarm, readclock will
set the alarm. If not, there is no effect.

Change-Id: Iee00066def2a0f742cdf0dbde8e32b376edf1b78
---

diff --git a/servers/pm/misc.c b/servers/pm/misc.c
index 0576a5513..d37e4d768 100644
--- a/servers/pm/misc.c
+++ b/servers/pm/misc.c
@@ -298,6 +298,15 @@ int do_reboot()
   abort_flag = (unsigned) m_in.reboot_flag;
   if (abort_flag >= RBT_INVALID) return(EINVAL); 
 
+  /* notify readclock (some arm systems power off via RTC alarms) */
+  if (abort_flag == RBT_POWEROFF) {
+	endpoint_t readclock_ep;
+	if (ds_retrieve_label_endpt("readclock.drv", &readclock_ep) == OK) {
+		message m; /* no params to set, nothing we can do if it fails */
+		_taskcall(readclock_ep, RTCDEV_PWR_OFF, &m);
+	}
+  }
+
   /* Order matters here. When VFS is told to reboot, it exits all its
    * processes, and then would be confused if they're exited again by
    * SIGKILL. So first kill, then reboot.