linux-kernel - [PATCH] rtc: rv8803: add wakeup-source support

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Date: Mon,  8 Jan 2024 01:30:10 +0100
From: alexandre.belloni@...tlin.com
To: Alessandro Zummo <a.zummo@...ertech.it>,
	Alexandre Belloni <alexandre.belloni@...tlin.com>
Cc: linux-rtc@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] rtc: rv8803: add wakeup-source support

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

The RV8803 can be wired directly to a PMIC that can wake up an SoC without
the CPU getting interrupts.

Signed-off-by: Alexandre Belloni <alexandre.belloni@...tlin.com>
---
 drivers/rtc/rtc-rv8803.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/rtc/rtc-rv8803.c b/drivers/rtc/rtc-rv8803.c
index 11e6b0d31f5d..1327251e527c 100644
--- a/drivers/rtc/rtc-rv8803.c
+++ b/drivers/rtc/rtc-rv8803.c
@@ -712,9 +712,12 @@ static int rv8803_probe(struct i2c_client *client)
 			if (err)
 				dev_err(&client->dev, "failed to set wake IRQ\n");
 		}
+	} else {
+		if (device_property_read_bool(&client->dev, "wakeup-source"))
+			device_init_wakeup(&client->dev, true);
+		else
+			clear_bit(RTC_FEATURE_ALARM, rv8803->rtc->features);
 	}
-	if (!client->irq)
-		clear_bit(RTC_FEATURE_ALARM, rv8803->rtc->features);
 
 	if (of_property_read_bool(client->dev.of_node, "epson,vdet-disable"))
 		rv8803->backup |= RX8900_FLAG_VDETOFF;
-- 
2.43.0