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| author | Vaibhav Jain <vaibhav@linux.vnet.ibm.com> | 2015-07-14 13:28:28 +0530 |
|---|---|---|
| committer | Alexandre Belloni <alexandre.belloni@free-electrons.com> | 2015-09-05 13:19:06 +0200 |
| commit | f4a2eecb3ff9f51b179b213e7cc3766f920f2dc5 (patch) | |
| tree | 29894bee75c6f1fb720da5f89a5c530153cba63b /drivers/rtc/rtc-opal.c | |
| parent | c28b42e3aee03fe869a3f73039cf92686ccbc8fb (diff) | |
| download | linux-f4a2eecb3ff9f51b179b213e7cc3766f920f2dc5.tar.gz | |
rtc: opal: Enable alarms only when opal supports tpo
rtc-opal driver provides support for rtc alarms via
timed-power-on(tpo). However some Power platforms like BML use a fake
rtc clock and don't support tpo. Such platforms are indicated by the
missing 'has-tpo' property in the device tree.
Current implementation however enables callback for
rtc_class_ops.read/set alarm irrespective of the tpo support from the
platform. This results in a failed opal call when kernel tries to read
an existing alarms via opal_get_tpo_time during rtc device registration.
This patch fixes this issue by setting opal_rtc_ops.read/set_alarm
callback pointers only when tpo is supported.
Acked-by: Michael Neuling <mikey@neuling.org>
Acked-by: Neelesh Gupta <neelegup@linux.vnet.ibm.com>
Signed-off-by: Vaibhav Jain <vaibhav@linux.vnet.ibm.com>
Acked-by: Stewart Smith <stewart@linux.vnet.ibm.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Diffstat (limited to 'drivers/rtc/rtc-opal.c')
| -rw-r--r-- | drivers/rtc/rtc-opal.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/drivers/rtc/rtc-opal.c b/drivers/rtc/rtc-opal.c index 417d7b4a5cd85..6fbf9e617151d 100644 --- a/drivers/rtc/rtc-opal.c +++ b/drivers/rtc/rtc-opal.c @@ -190,11 +190,9 @@ exit: return rc; } -static const struct rtc_class_ops opal_rtc_ops = { +static struct rtc_class_ops opal_rtc_ops = { .read_time = opal_get_rtc_time, .set_time = opal_set_rtc_time, - .read_alarm = opal_get_tpo_time, - .set_alarm = opal_set_tpo_time, }; static int opal_rtc_probe(struct platform_device *pdev) @@ -202,8 +200,11 @@ 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)) + NULL)) { 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; + } rtc = devm_rtc_device_register(&pdev->dev, DRVNAME, &opal_rtc_ops, THIS_MODULE); |