rtc: opal: enable support for the stardard "wakeup-source" property

Though the opal rtc driver should and will continue to support the legacy
"has-tpo" property to enable RTC as the wakeup source, we need to add
support for the new standard property "wakeup-source"

This patch adds support for "wakeup-source" property in addition to the
existing "has-tpo" property.

Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Cc: rtc-linux@googlegroups.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>

1 files changed, 3 insertions, 2 deletions

diff --git a/drivers/rtc/rtc-opal.c b/drivers/rtc/rtc-opal.c
index 590e1a45e0b2..df39ce02a99d 100644
--- a/drivers/rtc/rtc-opal.c
+++ b/drivers/rtc/rtc-opal.c
@@ -199,8 +199,9 @@ static int opal_rtc_probe(struct platform_device *pdev)
 {
         struct rtc_device *rtc;
 
-        if (pdev->dev.of_node && of_get_property(pdev->dev.of_node, "has-tpo",
-                                                 NULL)) {
+        if (pdev->dev.of_node &&
+            (of_property_read_bool(pdev->dev.of_node, "wakeup-source") ||
+             of_property_read_bool(pdev->dev.of_node, "has-tpo")/* legacy */)) {
                 device_set_wakeup_capable(&pdev->dev, true);
                 opal_rtc_ops.read_alarm = opal_get_tpo_time;
                 opal_rtc_ops.set_alarm = opal_set_tpo_time;