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authorBertrik Sikken <bertrik@sikken.nl>2010-06-27 16:39:50 +0000
committerBertrik Sikken <bertrik@sikken.nl>2010-06-27 16:39:50 +0000
commit9e86287946517e06893f4950d45d60056c00d9e7 (patch)
treee2dce706d064d9bf2c71fd1fa0116357a531d002 /firmware
parent99517d631953fe6728efafc8423f41dc673b0d80 (diff)
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Sansa clip+: prevent an unnecessary OF database refresh when using the wake-up alarm with a uSD card inserted (probably works for other AMSv2 targets too)
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@27158 a1c6a512-1295-4272-9138-f99709370657
Diffstat (limited to 'firmware')
-rw-r--r--firmware/drivers/rtc/rtc_as3514.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/firmware/drivers/rtc/rtc_as3514.c b/firmware/drivers/rtc/rtc_as3514.c
index f2716e52e8..81137bda14 100644
--- a/firmware/drivers/rtc/rtc_as3514.c
+++ b/firmware/drivers/rtc/rtc_as3514.c
@@ -99,6 +99,9 @@ void rtc_alarm_poweroff(void)
seconds >>= 8;
seconds |= 1<<7; /* enable bit */
ascodec_write(AS3543_WAKEUP, seconds);
+
+ /* write 0x80 to prevent the OF refreshing its database from the microSD */
+ ascodec_write(AS3543_WAKEUP, 0x80);
/* write our desired time of wake up to detect power-up from RTC */
ascodec_write(AS3543_WAKEUP, wakeup_h);
@@ -127,6 +130,9 @@ bool rtc_check_alarm_started(bool release_alarm)
ascodec_read(AS3543_WAKEUP); /* bits 15:8 */
if(!(ascodec_read(AS3543_WAKEUP) & (1<<7))) /* enable bit */
return false;
+
+ /* skip WAKEUP[3] which the OF uses for other purposes */
+ ascodec_read(AS3543_WAKEUP);
/* subsequent reads give the 16 bytes static SRAM */
wakeup_h = ascodec_read(AS3543_WAKEUP);