summaryrefslogtreecommitdiffstats
path: root/Documentation/hwmon
diff options
context:
space:
mode:
authorChris Packham <chris.packham@alliedtelesis.co.nz>2016-10-11 10:26:31 +1300
committerGuenter Roeck <linux@roeck-us.net>2016-12-02 13:28:05 -0800
commitaaf6fabf1be80b66aade0544e0ad619682e26616 (patch)
treedf02b5ebcb8c1fbf5c2efc64d11eff21bb696e28 /Documentation/hwmon
parent4538bfbf2d9f1fc48c07ac0cc0ee58716fe7fe96 (diff)
downloadlinux-aaf6fabf1be80b66aade0544e0ad619682e26616.tar.bz2
hwmon: Add tc654 driver
Add support for the tc654 and tc655 fan controllers from Microchip. http://ww1.microchip.com/downloads/en/DeviceDoc/20001734C.pdf Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz> Acked-by: Rob Herring <robh@kernel.org> [groeck: Fixed continuation line alignments] Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'Documentation/hwmon')
-rw-r--r--Documentation/hwmon/tc65431
1 files changed, 31 insertions, 0 deletions
diff --git a/Documentation/hwmon/tc654 b/Documentation/hwmon/tc654
new file mode 100644
index 000000000000..91a2843f5f98
--- /dev/null
+++ b/Documentation/hwmon/tc654
@@ -0,0 +1,31 @@
+Kernel driver tc654
+===================
+
+Supported chips:
+ * Microship TC654 and TC655
+ Prefix: 'tc654'
+ Datasheet: http://ww1.microchip.com/downloads/en/DeviceDoc/20001734C.pdf
+
+Authors:
+ Chris Packham <chris.packham@alliedtelesis.co.nz>
+ Masahiko Iwamoto <iwamoto@allied-telesis.co.jp>
+
+Description
+-----------
+This driver implements support for the Microchip TC654 and TC655.
+
+The TC654 uses the 2-wire interface compatible with the SMBUS 2.0
+specification. The TC654 has two (2) inputs for measuring fan RPM and
+one (1) PWM output which can be used for fan control.
+
+Configuration Notes
+-------------------
+Ordinarily the pwm1_mode ABI is used for controlling the pwm output
+mode. However, for this chip the output is always pwm, and the
+pwm1_mode determines if the pwm output is controlled via the pwm1 value
+or via the Vin analog input.
+
+
+Setting pwm1_mode to 1 will cause the pwm output to be driven based on
+the pwm1 value. Setting pwm1_mode to 0 will cause the pwm output to be
+driven based on the Vin input.