On 10/14/2014 02:08 PM, Neelesh Gupta wrote:
The patch implements the OPAL rtc driver that binds with the rtc
driver subsystem. The driver uses the platform device infrastructure
to probe the rtc device and register it to rtc class framework. The
'wakeup' is supported depending upon the property 'has-tpo' present
in the OF node. It provides a way to load the generic rtc driver in
in the absence of an OPAL driver.
The patch also moves the existing OPAL rtc get/set time interfaces to the
new driver and exposes the necessary OPAL calls using EXPORT_SYMBOL_GPL.
Hi Alessandro,
Awaiting Ack from your side, so that we can take this through the
powerpc tree.
Regards,
Neelesh
Test results:
-------------
Host:
[root@tul169p1 ~]# ls -l /sys/class/rtc/
total 0
lrwxrwxrwx 1 root root 0 Oct 14 03:07 rtc0 -> ../../devices/opal-rtc/rtc/rtc0
[root@tul169p1 ~]# cat /sys/devices/opal-rtc/rtc/rtc0/time
08:10:07
[root@tul169p1 ~]# echo `date '+%s' -d '+ 2 minutes'` > /sys/class/rtc/rtc0/wakealarm
[root@tul169p1 ~]# cat /sys/class/rtc/rtc0/wakealarm
1413274345
[root@tul169p1 ~]#
FSP:
$ smgr mfgState
standby
$ rtim timeofday
System time is valid: 2014/10/14 08:12:04.225115
$ smgr mfgState
ipling
$
Signed-off-by: Neelesh Gupta <neelegup@xxxxxxxxxxxxxxxxxx>
---
Changes in v3
=============
- Rebased to the latest tree.
Changes in v2
=============
- Added Documentation/devicetree/bindings/rtc/rtc-opal.txt
- Explicitly turn off RTC_UIE mode by setting 'rtc->uie_unsupported'
Documentation/devicetree/bindings/rtc/rtc-opal.txt | 16 +
arch/powerpc/include/asm/opal.h | 7 -
arch/powerpc/kernel/time.c | 1
arch/powerpc/platforms/powernv/opal-async.c | 3
arch/powerpc/platforms/powernv/opal-rtc.c | 65 +----
arch/powerpc/platforms/powernv/opal-wrappers.S | 2
arch/powerpc/platforms/powernv/opal.c | 6
arch/powerpc/platforms/powernv/setup.c | 2
drivers/rtc/Kconfig | 11 +
drivers/rtc/Makefile | 1
drivers/rtc/rtc-opal.c | 261 ++++++++++++++++++++
11 files changed, 325 insertions(+), 50 deletions(-)
create mode 100644 Documentation/devicetree/bindings/rtc/rtc-opal.txt
create mode 100644 drivers/rtc/rtc-opal.c
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