linux-kernel - [PATCH v5 1/3] ACPI: platform-profile: add platform_profile

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Message-ID: <afd975d98708921f67a269aaf031a1dd1be1220d.1712360639.git.soyer@irl.hu>
Date: Sat,  6 Apr 2024 02:01:31 +0200
From: Gergo Koteles <soyer@....hu>
To: "Rafael J. Wysocki" <rafael@...nel.org>,
  Len Brown <lenb@...nel.org>, Ike Panhc <ike.pan@...onical.com>,
  Hans de Goede <hdegoede@...hat.com>,
  Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>,
  Henrique de Moraes Holschuh <hmh@....eng.br>,
  Daniel Lezcano <daniel.lezcano@...aro.org>,
  Barnabás Pőcze <pobrn@...tonmail.com>
Cc: linux-acpi@...r.kernel.org, ibm-acpi-devel@...ts.sourceforge.net,
  platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org,
  Gergo Koteles <soyer@....hu>
Subject: [PATCH v5 1/3] ACPI: platform-profile: add platform_profile_cycle()

Some laptops have a key to switch platform profiles.

Add a platform_profile_cycle() function to cycle between the enabled
profiles.

Signed-off-by: Gergo Koteles <soyer@....hu>
---
 drivers/acpi/platform_profile.c  | 39 ++++++++++++++++++++++++++++++++
 include/linux/platform_profile.h |  1 +
 2 files changed, 40 insertions(+)

diff --git a/drivers/acpi/platform_profile.c b/drivers/acpi/platform_profile.c
index d418462ab791..acc606af812a 100644
--- a/drivers/acpi/platform_profile.c
+++ b/drivers/acpi/platform_profile.c
@@ -136,6 +136,45 @@ void platform_profile_notify(void)
 }
 EXPORT_SYMBOL_GPL(platform_profile_notify);

+int platform_profile_cycle(void)
+{
+	enum platform_profile_option profile;
+	enum platform_profile_option next;
+	int err;
+
+	err = mutex_lock_interruptible(&profile_lock);
+	if (err)
+		return err;
+
+	if (!cur_profile) {
+		mutex_unlock(&profile_lock);
+		return -ENODEV;
+	}
+
+	err = cur_profile->profile_get(cur_profile, &profile);
+	if (err) {
+		mutex_unlock(&profile_lock);
+		return err;
+	}
+
+	next = find_next_bit_wrap(cur_profile->choices,
+				  ARRAY_SIZE(profile_names), profile + 1);
+
+	if (WARN_ON(next == ARRAY_SIZE(profile_names))) {
+		mutex_unlock(&profile_lock);
+		return -EINVAL;
+	}
+
+	err = cur_profile->profile_set(cur_profile, next);
+	mutex_unlock(&profile_lock);
+
+	if (!err)
+		sysfs_notify(acpi_kobj, NULL, "platform_profile");
+
+	return err;
+}
+EXPORT_SYMBOL_GPL(platform_profile_cycle);
+
 int platform_profile_register(struct platform_profile_handler *pprof)
 {
 	int err;
diff --git a/include/linux/platform_profile.h b/include/linux/platform_profile.h
index e5cbb6841f3a..f5492ed413f3 100644
--- a/include/linux/platform_profile.h
+++ b/include/linux/platform_profile.h
@@ -36,6 +36,7 @@ struct platform_profile_handler {

 int platform_profile_register(struct platform_profile_handler *pprof);
 int platform_profile_remove(void);
+int platform_profile_cycle(void);
 void platform_profile_notify(void);

 #endif  /*_PLATFORM_PROFILE_H_*/
-- 
2.44.0