summaryrefslogtreecommitdiffstats
path: root/Documentation/hwmon/raspberrypi-hwmon
diff options
context:
space:
mode:
Diffstat (limited to 'Documentation/hwmon/raspberrypi-hwmon')
-rw-r--r--Documentation/hwmon/raspberrypi-hwmon22
1 files changed, 22 insertions, 0 deletions
diff --git a/Documentation/hwmon/raspberrypi-hwmon b/Documentation/hwmon/raspberrypi-hwmon
new file mode 100644
index 000000000000..3c92e2cb52d6
--- /dev/null
+++ b/Documentation/hwmon/raspberrypi-hwmon
@@ -0,0 +1,22 @@
+Kernel driver raspberrypi-hwmon
+===============================
+
+Supported boards:
+ * Raspberry Pi A+ (via GPIO on SoC)
+ * Raspberry Pi B+ (via GPIO on SoC)
+ * Raspberry Pi 2 B (via GPIO on SoC)
+ * Raspberry Pi 3 B (via GPIO on port expander)
+ * Raspberry Pi 3 B+ (via PMIC)
+
+Author: Stefan Wahren <stefan.wahren@i2se.com>
+
+Description
+-----------
+
+This driver periodically polls a mailbox property of the VC4 firmware to detect
+undervoltage conditions.
+
+Sysfs entries
+-------------
+
+in0_lcrit_alarm Undervoltage alarm