diff mbox series

[v2] rtc: pcf85363: Allow to wake up system without IRQ

Message ID 20230821072013.7072-1-mike.looijmans@topic.nl
State Accepted
Headers show
Series [v2] rtc: pcf85363: Allow to wake up system without IRQ | expand

Commit Message

Mike Looijmans Aug. 21, 2023, 7:20 a.m. UTC 
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@topic.nl>

---

Changes in v2:
Don't call device_init_wakeup when IRW request fails

 drivers/rtc/rtc-pcf85363.c | 30 +++++++++++++++++++++---------
 1 file changed, 21 insertions(+), 9 deletions(-)

Comments

Alexandre Belloni Aug. 27, 2023, 10:06 p.m. UTC | #1 
On Mon, 21 Aug 2023 09:20:13 +0200, Mike Looijmans wrote:
> 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.
> 
> [...]

Applied, thanks!

[1/1] rtc: pcf85363: Allow to wake up system without IRQ
      commit: 1e786b03705938870dafb629f2248f88d507a0ff

Best regards,
diff mbox series

Patch

diff --git a/drivers/rtc/rtc-pcf85363.c b/drivers/rtc/rtc-pcf85363.c
index 8958eadf1c3e..f9370e00d4dc 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);