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[RESEND,v4,2/3] hwmon: add fault attribute for voltage channels

Message ID 20240129-b4-ltc4282-support-v4-2-fe75798164cc@analog.com
State Accepted
Commit 35c1bfb99fef9c71f9df5c1325db99a79300bc97
Headers show
Series [RESEND,v4,1/3] dt-bindings: hwmon: Add LTC4282 bindings | expand

Commit Message

Nuno Sa Jan. 29, 2024, 4:13 p.m. UTC 
Sometimes a voltage channel might have an hard failure (eg: a shorted
MOSFET). Hence, add a fault attribute to report such failures.

Signed-off-by: Nuno Sa <nuno.sa@analog.com>
---
 Documentation/ABI/testing/sysfs-class-hwmon | 9 +++++++++
 drivers/hwmon/hwmon.c                       | 1 +
 include/linux/hwmon.h                       | 2 ++
 3 files changed, 12 insertions(+)
diff mbox series

Patch

diff --git a/Documentation/ABI/testing/sysfs-class-hwmon b/Documentation/ABI/testing/sysfs-class-hwmon
index 3dac923c9b0e..6c4e68ad4a83 100644
--- a/Documentation/ABI/testing/sysfs-class-hwmon
+++ b/Documentation/ABI/testing/sysfs-class-hwmon
@@ -149,6 +149,15 @@  Description:
 
 		RW
 
+What:		/sys/class/hwmon/hwmonX/inY_fault
+Description:
+		Reports a voltage hard failure (eg: shorted component)
+
+		- 1: Failed
+		- 0: Ok
+
+		RO
+
 What:		/sys/class/hwmon/hwmonX/cpuY_vid
 Description:
 		CPU core reference voltage.
diff --git a/drivers/hwmon/hwmon.c b/drivers/hwmon/hwmon.c
index c7dd3f5b2bd5..18705049ad61 100644
--- a/drivers/hwmon/hwmon.c
+++ b/drivers/hwmon/hwmon.c
@@ -510,6 +510,7 @@  static const char * const hwmon_in_attr_templates[] = {
 	[hwmon_in_rated_min] = "in%d_rated_min",
 	[hwmon_in_rated_max] = "in%d_rated_max",
 	[hwmon_in_beep] = "in%d_beep",
+	[hwmon_in_fault] = "in%d_fault",
 };
 
 static const char * const hwmon_curr_attr_templates[] = {
diff --git a/include/linux/hwmon.h b/include/linux/hwmon.h
index c2c0da18dfa3..c7885fdce88f 100644
--- a/include/linux/hwmon.h
+++ b/include/linux/hwmon.h
@@ -141,6 +141,7 @@  enum hwmon_in_attributes {
 	hwmon_in_rated_min,
 	hwmon_in_rated_max,
 	hwmon_in_beep,
+	hwmon_in_fault,
 };
 
 #define HWMON_I_ENABLE		BIT(hwmon_in_enable)
@@ -162,6 +163,7 @@  enum hwmon_in_attributes {
 #define HWMON_I_RATED_MIN	BIT(hwmon_in_rated_min)
 #define HWMON_I_RATED_MAX	BIT(hwmon_in_rated_max)
 #define HWMON_I_BEEP		BIT(hwmon_in_beep)
+#define HWMON_I_FAULT		BIT(hwmon_in_fault)
 
 enum hwmon_curr_attributes {
 	hwmon_curr_enable,