linux-kernel - [PATCH v4 1/5] ACPI: battery: add devm_battery_hook

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Date: Sun, 16 Jun 2024 21:03:29 +0200
From: Thomas Weißschuh <linux@...ssschuh.net>
To: Benson Leung <bleung@...omium.org>, Guenter Roeck <groeck@...omium.org>, 
 Sebastian Reichel <sre@...nel.org>, 
 Thomas Weißschuh <thomas@...ssschuh.net>, 
 "Rafael J. Wysocki" <rafael@...nel.org>, Len Brown <lenb@...nel.org>, 
 Robert Moore <robert.moore@...el.com>, Tzung-Bi Shih <tzungbi@...nel.org>
Cc: chrome-platform@...ts.linux.dev, linux-kernel@...r.kernel.org, 
 linux-pm@...r.kernel.org, Mario Limonciello <mario.limonciello@....com>, 
 Dustin Howett <dustin@...ett.net>, 
 Stephen Horvath <s.horvath@...look.com.au>, 
 Rajas Paranjpe <paranjperajas@...il.com>, linux-acpi@...r.kernel.org, 
 acpica-devel@...ts.linux.dev, Matt Hartley <matt.hartley@...il.com>, 
 "Rafael J. Wysocki" <rafael.j.wysocki@...el.com>, 
 Thomas Weißschuh <linux@...ssschuh.net>
Subject: [PATCH v4 1/5] ACPI: battery: add devm_battery_hook_register()

Add a utility function for device-managed registration of battery hooks.
The function makes it easier to manage the lifecycle of a hook.

Acked-by: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
Signed-off-by: Thomas Weißschuh <linux@...ssschuh.net>
---
 drivers/acpi/battery.c | 15 +++++++++++++++
 include/acpi/battery.h |  2 ++
 2 files changed, 17 insertions(+)

diff --git a/drivers/acpi/battery.c b/drivers/acpi/battery.c
index b379401ff1c2..6ea979f76f84 100644
--- a/drivers/acpi/battery.c
+++ b/drivers/acpi/battery.c
@@ -756,6 +756,21 @@ void battery_hook_register(struct acpi_battery_hook *hook)
 }
 EXPORT_SYMBOL_GPL(battery_hook_register);

+static void devm_battery_hook_unregister(void *data)
+{
+	struct acpi_battery_hook *hook = data;
+
+	battery_hook_unregister(hook);
+}
+
+int devm_battery_hook_register(struct device *dev, struct acpi_battery_hook *hook)
+{
+	battery_hook_register(hook);
+
+	return devm_add_action_or_reset(dev, devm_battery_hook_unregister, hook);
+}
+EXPORT_SYMBOL_GPL(devm_battery_hook_register);
+
 /*
  * This function gets called right after the battery sysfs
  * attributes have been added, so that the drivers that
diff --git a/include/acpi/battery.h b/include/acpi/battery.h
index 611a2561a014..c93f16dfb944 100644
--- a/include/acpi/battery.h
+++ b/include/acpi/battery.h
@@ -2,6 +2,7 @@
 #ifndef __ACPI_BATTERY_H
 #define __ACPI_BATTERY_H

+#include <linux/device.h>
 #include <linux/power_supply.h>

 #define ACPI_BATTERY_CLASS "battery"
@@ -19,5 +20,6 @@ struct acpi_battery_hook {

 void battery_hook_register(struct acpi_battery_hook *hook);
 void battery_hook_unregister(struct acpi_battery_hook *hook);
+int devm_battery_hook_register(struct device *dev, struct acpi_battery_hook *hook);

 #endif

-- 
2.45.2