Mailing List Archive

From: Alexandre Belloni <alexandre.belloni@bootlin.com>

In some platforms, the RTC is able to wake up the system but is not
directly connected to an IRQ. Add wakeup-source property support to be able
to express this in the Device Tree.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
---
drivers/rtc/rtc-pcf8563.c | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/rtc/rtc-pcf8563.c b/drivers/rtc/rtc-pcf8563.c
index ea82b89d8929..1949d7473310 100644
--- a/drivers/rtc/rtc-pcf8563.c
+++ b/drivers/rtc/rtc-pcf8563.c
@@ -527,7 +527,6 @@ static int pcf8563_probe(struct i2c_client *client)

i2c_set_clientdata(client, pcf8563);
pcf8563->client = client;
- device_set_wakeup_capable(&client->dev, 1);

/* Set timer to lowest frequency to save power (ref Haoyu datasheet) */
buf = PCF8563_TMRC_1_60;
@@ -553,6 +552,7 @@ static int pcf8563_probe(struct i2c_client *client)
/* the pcf8563 alarm only supports a minute accuracy */
set_bit(RTC_FEATURE_ALARM_RES_MINUTE, pcf8563->rtc->features);
clear_bit(RTC_FEATURE_UPDATE_INTERRUPT, pcf8563->rtc->features);
+ clear_bit(RTC_FEATURE_ALARM, pcf8563->rtc->features);
pcf8563->rtc->range_min = RTC_TIMESTAMP_BEGIN_2000;
pcf8563->rtc->range_max = RTC_TIMESTAMP_END_2099;
pcf8563->rtc->set_start_time = true;
@@ -573,7 +573,12 @@ static int pcf8563_probe(struct i2c_client *client)
return err;
}
} else {
- clear_bit(RTC_FEATURE_ALARM, pcf8563->rtc->features);
+ client->irq = 0;
+ }
+
+ if (client->irq > 0 || device_property_read_bool(&client->dev, "wakeup-source")) {
+ device_init_wakeup(&client->dev, true);
+ set_bit(RTC_FEATURE_ALARM, pcf8563->rtc->features);
}

err = devm_rtc_register_device(pcf8563->rtc);
--
2.44.0