linux-kernel - [PATCH 2/4] ABI: sysfs-class-hwmon: document missing humidity attributes

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Message-Id: <20231116-hwmon_abi-v1-2-8bfb7f51145a@gmail.com>
Date:   Fri, 17 Nov 2023 07:40:35 +0100
From:   Javier Carrasco <javier.carrasco.cruz@...il.com>
To:     Jean Delvare <jdelvare@...e.com>,
        Guenter Roeck <linux@...ck-us.net>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Mauro Carvalho Chehab <mchehab+huawei@...nel.org>
Cc:     linux-hwmon@...r.kernel.org, linux-kernel@...r.kernel.org,
        Javier Carrasco <javier.carrasco.cruz@...il.com>
Subject: [PATCH 2/4] ABI: sysfs-class-hwmon: document missing humidity
 attributes

All these attributes already exist and are used by the hwmon subsystem,
but they still must be documented.

The missing attributes are the following:
- humidityY_alarm
- humidityY_fault
- humidityY_label
- humidityY_max
- humidityY_max_hyst
- humidityY_min
- humidityY_min_hyst

Add the missing humidity attributes to the ABI documentation according
to their current usage and access rights in the hwmon subsystem.

Signed-off-by: Javier Carrasco <javier.carrasco.cruz@...il.com>
---
 Documentation/ABI/testing/sysfs-class-hwmon | 69 +++++++++++++++++++++++++++++
 1 file changed, 69 insertions(+)

diff --git a/Documentation/ABI/testing/sysfs-class-hwmon b/Documentation/ABI/testing/sysfs-class-hwmon
index b998a42add95..dccbcdc2dad8 100644
--- a/Documentation/ABI/testing/sysfs-class-hwmon
+++ b/Documentation/ABI/testing/sysfs-class-hwmon
@@ -887,6 +887,15 @@ Description:
 
 		RW
 
+What:		/sys/class/hwmon/hwmonX/humidityY_alarm
+Description:
+		Humidity limit detection
+
+		- 0: OK
+		- 1: Humidity limit has been reached
+
+		RO
+
 What:		/sys/class/hwmon/hwmonX/humidityY_enable
 Description:
 		Enable or disable the sensors
@@ -899,6 +908,15 @@ Description:
 
 		RW
 
+What:		/sys/class/hwmon/hwmonX/humidityY_fault
+Description:
+		Reports a humidity sensor failure.
+
+		- 1: Failed
+		- 0: Ok
+
+		RO
+
 What:		/sys/class/hwmon/hwmonX/humidityY_input
 Description:
 		Humidity
@@ -907,6 +925,57 @@ Description:
 
 		RO
 
+What:		/sys/class/hwmon/hwmonX/humidityY_label
+Description:
+		Suggested humidity channel label.
+
+		Text string
+
+		Should only be created if the driver has hints about what
+		this humidity channel is being used for, and user-space
+		doesn't. In all other cases, the label is provided by
+		user-space.
+
+		RO
+
+What:		/sys/class/hwmon/hwmonX/humidityY_max
+Description:
+		Humidity max value.
+
+		Unit: milli-percent (per cent mille, pcm)
+
+		RW
+
+What:		/sys/class/hwmon/hwmonX/humidityY_max_hyst
+Description:
+		Humidity hysteresis value for max limit.
+
+		Unit: milli-percent (per cent mille, pcm)
+
+		Must be reported as an absolute humidity, NOT a delta
+		from the max value.
+
+		RW
+
+What:		/sys/class/hwmon/hwmonX/humidityY_min
+Description:
+		Humidity min value.
+
+		Unit: milli-percent (per cent mille, pcm)
+
+		RW
+
+What:		/sys/class/hwmon/hwmonX/humidityY_min_hyst
+Description:
+		Humidity hysteresis value for min limit.
+
+		Unit: milli-percent (per cent mille, pcm)
+
+		Must be reported as an absolute humidity, NOT a delta
+		from the min value.
+
+		RW
+
 What:		/sys/class/hwmon/hwmonX/humidityY_rated_min
 Description:
 		Minimum rated humidity.

-- 
2.39.2