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authorGuenter Roeck <linux@roeck-us.net>2012-12-04 08:30:54 -0800
committerGuenter Roeck <linux@roeck-us.net>2013-04-07 21:16:39 -0700
commit77eb5b3703d995e6c72ef4a1e5411821f81df7e4 (patch)
treef91488312051b427872d45c7b7b62b0bee7b2098 /Documentation/hwmon
parent84d19d92f78e10f8bdc1b3e1b5ddcaf5895edaf7 (diff)
hwmon: (nct6775) Add support for pwm, pwm_mode, and pwm_enable
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'Documentation/hwmon')
-rw-r--r--Documentation/hwmon/nct677518
1 files changed, 18 insertions, 0 deletions
diff --git a/Documentation/hwmon/nct6775 b/Documentation/hwmon/nct6775
index dcd56a375ba5..7c9f1d303913 100644
--- a/Documentation/hwmon/nct6775
+++ b/Documentation/hwmon/nct6775
@@ -69,6 +69,24 @@ is driven slower/faster to reach the predefined range again.
The mode works for fan1-fan5.
+sysfs attributes
+----------------
+
+pwm[1-5] - this file stores PWM duty cycle or DC value (fan speed) in range:
+ 0 (lowest speed) to 255 (full)
+
+pwm[1-5]_enable - this file controls mode of fan/temperature control:
+ * 0 Fan control disabled (fans set to maximum speed)
+ * 1 Manual mode, write to pwm[0-5] any value 0-255
+ * 2 "Thermal Cruise" mode
+ * 3 "Fan Speed Cruise" mode
+ * 4 "Smart Fan III" mode (NCT6775F only)
+ * 5 "Smart Fan IV" mode
+
+pwm[1-5]_mode - controls if output is PWM or DC level
+ * 0 DC output
+ * 1 PWM output
+
Usage Notes
-----------