Patch "rtc: pcf85363: Allow to wake up system without IRQ" has been added to the 6.5-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    rtc: pcf85363: Allow to wake up system without IRQ

to the 6.5-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     rtc-pcf85363-allow-to-wake-up-system-without-irq.patch
and it can be found in the queue-6.5 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit a925e20b6a190e80d34eeb643f97670bbd598b44
Author: Mike Looijmans <mike.looijmans@xxxxxxxx>
Date:   Mon Aug 21 09:20:13 2023 +0200

    rtc: pcf85363: Allow to wake up system without IRQ
    
    [ Upstream commit 1e786b03705938870dafb629f2248f88d507a0ff ]
    
    When wakeup-source is set in the devicetree, set up the device for
    using the output as interrupt instead of clock. This is similar to
    how other RTC devices handle this.
    
    This allows the clock chip to turn on the board when wired to do
    so in hardware.
    
    Signed-off-by: Mike Looijmans <mike.looijmans@xxxxxxxx>
    Link: https://lore.kernel.org/r/20230821072013.7072-1-mike.looijmans@xxxxxxxx
    Signed-off-by: Alexandre Belloni <alexandre.belloni@xxxxxxxxxxx>
    Stable-dep-of: 2be36c09b6b0 ("rtc: pcf85363: fix wrong mask/val parameters in regmap_update_bits call")
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/drivers/rtc/rtc-pcf85363.c b/drivers/rtc/rtc-pcf85363.c
index 65b8b1338dbb0..b2b7ea32b961f 100644
--- a/drivers/rtc/rtc-pcf85363.c
+++ b/drivers/rtc/rtc-pcf85363.c
@@ -403,6 +403,7 @@ static int pcf85363_probe(struct i2c_client *client)
 		},
 	};
 	int ret, i, err;
+	bool wakeup_source;
 
 	if (data)
 		config = data;
@@ -432,25 +433,36 @@ static int pcf85363_probe(struct i2c_client *client)
 	pcf85363->rtc->ops = &rtc_ops;
 	pcf85363->rtc->range_min = RTC_TIMESTAMP_BEGIN_2000;
 	pcf85363->rtc->range_max = RTC_TIMESTAMP_END_2099;
-	clear_bit(RTC_FEATURE_ALARM, pcf85363->rtc->features);
+
+	wakeup_source = device_property_read_bool(&client->dev,
+						  "wakeup-source");
+	if (client->irq > 0 || wakeup_source) {
+		regmap_write(pcf85363->regmap, CTRL_FLAGS, 0);
+		regmap_update_bits(pcf85363->regmap, CTRL_PIN_IO,
+				   PIN_IO_INTA_OUT, PIN_IO_INTAPM);
+	}
 
 	if (client->irq > 0) {
 		unsigned long irqflags = IRQF_TRIGGER_LOW;
 
 		if (dev_fwnode(&client->dev))
 			irqflags = 0;
-
-		regmap_write(pcf85363->regmap, CTRL_FLAGS, 0);
-		regmap_update_bits(pcf85363->regmap, CTRL_PIN_IO,
-				   PIN_IO_INTA_OUT, PIN_IO_INTAPM);
 		ret = devm_request_threaded_irq(&client->dev, client->irq,
 						NULL, pcf85363_rtc_handle_irq,
 						irqflags | IRQF_ONESHOT,
 						"pcf85363", client);
-		if (ret)
-			dev_warn(&client->dev, "unable to request IRQ, alarms disabled\n");
-		else
-			set_bit(RTC_FEATURE_ALARM, pcf85363->rtc->features);
+		if (ret) {
+			dev_warn(&client->dev,
+				 "unable to request IRQ, alarms disabled\n");
+			client->irq = 0;
+		}
+	}
+
+	if (client->irq > 0 || wakeup_source) {
+		device_init_wakeup(&client->dev, true);
+		set_bit(RTC_FEATURE_ALARM, pcf85363->rtc->features);
+	} else {
+		clear_bit(RTC_FEATURE_ALARM, pcf85363->rtc->features);
 	}
 
 	ret = devm_rtc_register_device(pcf85363->rtc);