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authorThomas Weißschuh <linux@weissschuh.net>2023-09-02 10:47:01 +0300
committerGuenter Roeck <linux@roeck-us.net>2023-10-27 17:27:23 +0300
commit4381a36abdf1c5c0323c1c51f869dc000115eb20 (patch)
tree450a3c877d7106ecbaef6c457b8409b006ec79a6 /Documentation/hwmon
parent9da2901c47332b030ea4d2a2302bc7c0b83fc67c (diff)
downloadlinux-4381a36abdf1c5c0323c1c51f869dc000115eb20.tar.xz
hwmon: add POWER-Z driver
POWER-Z is a series of devices to monitor power characteristics of USB-C connections and display those on a on-device display. Some of the devices, notably KM002C and KM003C, contain an additional port which exposes the measurements via USB. This is a driver for this monitor port. It was developed and tested with the KM003C. Signed-off-by: Thomas Weißschuh <linux@weissschuh.net> Link: https://lore.kernel.org/r/20230902-powerz-v4-1-7ec2c1440687@weissschuh.net [groeck: Release urb after hwmon registration error; Move priv->status initialization to correct place before reinit_completion ] Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'Documentation/hwmon')
-rw-r--r--Documentation/hwmon/index.rst1
-rw-r--r--Documentation/hwmon/powerz.rst30
2 files changed, 31 insertions, 0 deletions
diff --git a/Documentation/hwmon/index.rst b/Documentation/hwmon/index.rst
index 88dadea85cfc..10a54644557d 100644
--- a/Documentation/hwmon/index.rst
+++ b/Documentation/hwmon/index.rst
@@ -178,6 +178,7 @@ Hardware Monitoring Kernel Drivers
peci-cputemp
peci-dimmtemp
pmbus
+ powerz
powr1220
pxe1610
pwm-fan
diff --git a/Documentation/hwmon/powerz.rst b/Documentation/hwmon/powerz.rst
new file mode 100644
index 000000000000..317084e0b76b
--- /dev/null
+++ b/Documentation/hwmon/powerz.rst
@@ -0,0 +1,30 @@
+.. SPDX-License-Identifier: GPL-2.0-or-later
+
+Kernel driver POWERZ
+====================
+
+Supported chips:
+
+ * ChargerLAB POWER-Z KM003C
+
+ Prefix: 'powerz'
+
+ Addresses scanned: -
+
+Author:
+
+ - Thomas Weißschuh <linux@weissschuh.net>
+
+Description
+-----------
+
+This driver implements support for the ChargerLAB POWER-Z USB-C power testing
+family.
+
+The device communicates with the custom protocol over USB.
+
+The channel labels exposed via hwmon match the labels used by the on-device
+display and the official POWER-Z PC software.
+
+As current can flow in both directions through the tester the sign of the
+channel "curr1_input" (label "IBUS") indicates the direction.