Input: pm8941-pwrkey - disable wakeup for resin by default

'Resin' (*Res*et *In*put) is usually connected to a volume down button
on devices, which is usually not expected to wake up the device from
suspend.

On the other hand, pwrkey should keep wakeup on. So do not enable wakeup
for resin unless the "wakeup-source" property is specified in
devicetree.

Note, that this does change behavior by turning off wakeup by default
for 'resin' and requiring a new dt property to be added to turn it on
again. But since this is not expected behavior in the first place, and
most users will not expect this, I'd argue this change is acceptable.

Signed-off-by: Luca Weiss <luca@lucaweiss.eu>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://lore.kernel.org/r/20250909-resin-wakeup-v1-2-46159940e02b@lucaweiss.eu
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

Author: z3ntu

drivers/input/misc/pm8941-pwrkey.c

@@ -60,6 +60,7 @@ struct pm8941_data {
 	bool		supports_ps_hold_poff_config;
 	bool		supports_debounce_config;
 	bool		has_pon_pbs;
+	bool		wakeup_source_default;
 	const char	*name;
 	const char	*phys;
 };
@@ -245,7 +246,7 @@ static DEFINE_SIMPLE_DEV_PM_OPS(pm8941_pwr_key_pm_ops,
 static int pm8941_pwrkey_probe(struct platform_device *pdev)
 {
 	struct pm8941_pwrkey *pwrkey;
-	bool pull_up;
+	bool pull_up, wakeup;
 	struct device *parent;
 	struct device_node *regmap_node;
 	const __be32 *addr;
@@ -402,8 +403,11 @@ static int pm8941_pwrkey_probe(struct platform_device *pdev)
 		}
 	}
 
+	wakeup = pwrkey->data->wakeup_source_default ||
+		of_property_read_bool(pdev->dev.of_node, "wakeup-source");
+
 	platform_set_drvdata(pdev, pwrkey);
-	device_init_wakeup(&pdev->dev, 1);
+	device_init_wakeup(&pdev->dev, wakeup);
 
 	return 0;
 }
@@ -424,6 +428,7 @@ static const struct pm8941_data pwrkey_data = {
 	.supports_ps_hold_poff_config = true,
 	.supports_debounce_config = true,
 	.has_pon_pbs = false,
+	.wakeup_source_default = true,
 };
 
 static const struct pm8941_data resin_data = {
@@ -434,6 +439,7 @@ static const struct pm8941_data resin_data = {
 	.supports_ps_hold_poff_config = true,
 	.supports_debounce_config = true,
 	.has_pon_pbs = false,
+	.wakeup_source_default = false,
 };
 
 static const struct pm8941_data pon_gen3_pwrkey_data = {
@@ -443,6 +449,7 @@ static const struct pm8941_data pon_gen3_pwrkey_data = {
 	.supports_ps_hold_poff_config = false,
 	.supports_debounce_config = false,
 	.has_pon_pbs = true,
+	.wakeup_source_default = true,
 };
 
 static const struct pm8941_data pon_gen3_resin_data = {
@@ -452,6 +459,7 @@ static const struct pm8941_data pon_gen3_resin_data = {
 	.supports_ps_hold_poff_config = false,
 	.supports_debounce_config = false,
 	.has_pon_pbs = true,
+	.wakeup_source_default = false,
 };
 
 static const struct of_device_id pm8941_pwr_key_id_table[] = {