linux-kernel - [PATCH 01/12] PM: sleep: wakeirq: Introduce device-managed variant of dev_pm_set_wake

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Message-Id: <20241228-wake_irq-v1-1-09cfca77cd47@nxp.com>
Date: Sat, 28 Dec 2024 09:14:37 +0800
From: "Peng Fan (OSS)" <peng.fan@....nxp.com>
To: "Rafael J. Wysocki" <rafael@...nel.org>, 
 Len Brown <len.brown@...el.com>, Pavel Machek <pavel@....cz>, 
 Greg Kroah-Hartman <gregkh@...uxfoundation.org>, 
 Dmitry Torokhov <dmitry.torokhov@...il.com>, 
 Alexandre Belloni <alexandre.belloni@...tlin.com>, 
 Maxime Coquelin <mcoquelin.stm32@...il.com>, 
 Alexandre Torgue <alexandre.torgue@...s.st.com>, 
 Linus Walleij <linus.walleij@...aro.org>, 
 Conor Dooley <conor.dooley@...rochip.com>, 
 Daire McNamara <daire.mcnamara@...rochip.com>
Cc: linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org, 
 linux-input@...r.kernel.org, linux-rtc@...r.kernel.org, 
 linux-stm32@...md-mailman.stormreply.com, 
 linux-arm-kernel@...ts.infradead.org, linux-arm-msm@...r.kernel.org, 
 linux-riscv@...ts.infradead.org, Peng Fan <peng.fan@....com>
Subject: [PATCH 01/12] PM: sleep: wakeirq: Introduce device-managed variant
 of dev_pm_set_wake_irq

From: Peng Fan <peng.fan@....com>

Add device-managed variant of dev_pm_set_wake_irq which automatically
clear the wake irq on device destruction to simplify error handling
and resource management in drivers.

Signed-off-by: Peng Fan <peng.fan@....com>
---
 drivers/base/power/wakeirq.c | 25 +++++++++++++++++++++++++
 include/linux/pm_wakeirq.h   |  6 ++++++
 2 files changed, 31 insertions(+)

diff --git a/drivers/base/power/wakeirq.c b/drivers/base/power/wakeirq.c
index 5a5a9e978e85f3fc9d89cb7d43527dc1dd42a9b1..cdc445189f68479c54f85e84be09ae4f488df1b5 100644
--- a/drivers/base/power/wakeirq.c
+++ b/drivers/base/power/wakeirq.c
@@ -103,6 +103,31 @@ void dev_pm_clear_wake_irq(struct device *dev)
 }
 EXPORT_SYMBOL_GPL(dev_pm_clear_wake_irq);

+static void devm_pm_clear_wake_irq(void *dev)
+{
+	dev_pm_clear_wake_irq(dev);
+}
+
+/**
+ * devm_pm_set_wake_irq - device-managed variant of dev_pm_set_wake_irq
+ * @dev: Device entry
+ * @irq: Device IO interrupt
+ *
+ *
+ * Attach a device IO interrupt as a wake IRQ, same with dev_pm_set_wake_irq,
+ * but the device will be auto clear wake capability on driver detach.
+ */
+int devm_pm_set_wake_irq(struct device *dev, int irq)
+{
+	int ret;
+
+	ret = dev_pm_set_wake_irq(dev, irq);
+	if (ret)
+		return ret;
+
+	return devm_add_action_or_reset(dev, devm_pm_clear_wake_irq, dev);
+}
+
 /**
  * handle_threaded_wake_irq - Handler for dedicated wake-up interrupts
  * @irq: Device specific dedicated wake-up interrupt
diff --git a/include/linux/pm_wakeirq.h b/include/linux/pm_wakeirq.h
index d9642c6cf85211af603ce39e280a5b4de6617ee5..25b63ed51b765c2c6919f259668a12675330835e 100644
--- a/include/linux/pm_wakeirq.h
+++ b/include/linux/pm_wakeirq.h
@@ -10,6 +10,7 @@ extern int dev_pm_set_wake_irq(struct device *dev, int irq);
 extern int dev_pm_set_dedicated_wake_irq(struct device *dev, int irq);
 extern int dev_pm_set_dedicated_wake_irq_reverse(struct device *dev, int irq);
 extern void dev_pm_clear_wake_irq(struct device *dev);
+extern int devm_pm_set_wake_irq(struct device *dev, int irq);

 #else	/* !CONFIG_PM */

@@ -32,5 +33,10 @@ static inline void dev_pm_clear_wake_irq(struct device *dev)
 {
 }

+static inline int devm_pm_set_wake_irq(struct device *dev, int irq)
+{
+	return 0;
+}
+
 #endif	/* CONFIG_PM */
 #endif	/* _LINUX_PM_WAKEIRQ_H */

-- 
2.37.1