linux-kernel - [PATCH v2 4/8] ABI: sysfs-devices-power: document some RPM statistics

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Message-Id: <3a94cad2d2997773fb6a58f0c6239ec52d0aa316.1631630792.git.mchehab+huawei@kernel.org>
Date:   Tue, 14 Sep 2021 16:55:17 +0200
From:   Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Linux Doc Mailing List <linux-doc@...r.kernel.org>
Cc:     Mauro Carvalho Chehab <mchehab+huawei@...nel.org>,
        "Jonathan Corbet" <corbet@....net>, linux-kernel@...r.kernel.org
Subject: [PATCH v2 4/8] ABI: sysfs-devices-power: document some RPM statistics

Changeset 8d4b9d1bfef1 ("PM / Runtime: Add runtime PM statistics (v3)")
added runtime_active_time and runtime_suspended_time, in order
to allow powertop to identify the amount of time a device is
active/suspended.

Add an ABI description for those.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
---
 Documentation/ABI/testing/sysfs-devices-power | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/Documentation/ABI/testing/sysfs-devices-power b/Documentation/ABI/testing/sysfs-devices-power
index 1763e64dd152..84694b8fec8e 100644
--- a/Documentation/ABI/testing/sysfs-devices-power
+++ b/Documentation/ABI/testing/sysfs-devices-power
@@ -269,3 +269,17 @@ Description:
 		the current runtime PM status of the device, which may be
 		"suspended", "suspending", "resuming", "active", "error" (fatal
 		error), or "unsupported" (runtime PM is disabled).
+
+What:		/sys/devices/.../power/runtime_active_time
+Date:		Jul 2010
+Contact:	Arjan van de Ven <arjan@...ux.intel.com>
+Description:
+		Reports the total time that the device has been active.
+		Used for runtime PM statistics.
+
+What:		/sys/devices/.../power/runtime_suspended_time
+Date:		Jul 2010
+Contact:	Arjan van de Ven <arjan@...ux.intel.com>
+Description:
+		Reports total time that the device has been suspended.
+		Used for runtime PM statistics.
-- 
2.31.1