linux-kernel - [PATCH v2 2/6] ABI: sysfs-class-hwmon: add a description for fanY

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Date:   Mon, 28 Nov 2022 17:02:15 -0600
From:   nick.hawkins@....com
To:     jdelvare@...e.com, linux@...ck-us.net, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, verdun@....com,
        nick.hawkins@....com, corbet@....net, linux@...linux.org.uk,
        linux-hwmon@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, linux-doc@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Subject: [PATCH v2 2/6] ABI: sysfs-class-hwmon: add a description for fanY_fault

From: Nick Hawkins <nick.hawkins@....com>

The fans are capable of reporting a fault to the CPLD controller which
then reports it to the GXP SoC via PLREGS. This patch enables hwmon to
be able to report these failures up to the HOST OS.

Signed-off-by: Nick Hawkins <nick.hawkins@....com>

---

v2:
 *No change
---
 Documentation/ABI/testing/sysfs-class-hwmon | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/Documentation/ABI/testing/sysfs-class-hwmon b/Documentation/ABI/testing/sysfs-class-hwmon
index 7271781a23b2..638f4c6d4ec7 100644
--- a/Documentation/ABI/testing/sysfs-class-hwmon
+++ b/Documentation/ABI/testing/sysfs-class-hwmon
@@ -276,6 +276,15 @@ Description:
 
 		RW
 
+What:		/sys/class/hwmon/hwmonX/fanY_fault
+Description:
+		Reports if a fan has reported failure.
+
+		- 1: Failed
+		- 0: Ok
+
+		RO
+
 What:		/sys/class/hwmon/hwmonX/pwmY
 Description:
 		Pulse width modulation fan control.
-- 
2.17.1