Another (hopefully final) fix for FS#11453 (AMSv2 powerdown fails sometimes when wakeup timer set) by Fabian Vogel.

This fix disables MCLK before powerdown-for-wakeup.


git-svn-id: svn://svn.rockbox.org/rockbox/trunk@28435 a1c6a512-1295-4272-9138-f99709370657

docs/CREDITS

@@ -562,6 +562,7 @@ Tuomas Airaksinen
 Calvin Walden
 Michael Gentry
 David Fowle
+Fabian Vogel
 
 The libmad team
 The wavpack team

firmware/drivers/rtc/rtc_as3514.c

@@ -142,6 +142,10 @@ void rtc_alarm_poweroff(void)
 
     seconds -= tm.tm_sec;
 
+    /* disable MCLK, it is a wakeup source and prevents proper shutdown */
+    CGU_AUDIO = (2 << 0) | (1 << 11);
+    CGU_PLLBSUP = (1 << 2) | (1 << 3);
+
     /* write wakeup register */
     alarm.seconds = seconds;
     alarm.enabled = true;