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authorMarc Hulsman <m.hulsman@tudelft.nl>2008-10-17 11:51:17 -0400
committerJean Delvare <khali@mahadeva.delvare>2008-10-17 11:51:17 -0400
commita5a4598cd2e7cae456a7f2a100bf0e5c3c7811c7 (patch)
treed2a5da96eae842f33bea66101a92abf88612aa9f /Documentation/hwmon/w83791d
parentb5938f8c4a530b2fad18f2293ffaf79ac9f5a148 (diff)
hwmon: (w83791d) add support for thermal cruise mode
Add support to set target temperature and tolerance for thermal cruise mode. Signed-off-by: Marc Hulsman <m.hulsman@tudelft.nl> Acked-by: Hans de Goede <j.w.r.degoede@hhs.nl> Signed-off-by: Jean Delvare <khali@linux-fr.org>
Diffstat (limited to 'Documentation/hwmon/w83791d')
-rw-r--r--Documentation/hwmon/w83791d19
1 files changed, 14 insertions, 5 deletions
diff --git a/Documentation/hwmon/w83791d b/Documentation/hwmon/w83791d
index b1e4798764e8..5663e491655c 100644
--- a/Documentation/hwmon/w83791d
+++ b/Documentation/hwmon/w83791d
@@ -77,6 +77,9 @@ readings can be divided by a programmable divider (1, 2, 4, 8, 16,
77 77
78Each fan controlled is controlled by PWM. The PWM duty cycle can be read and 78Each fan controlled is controlled by PWM. The PWM duty cycle can be read and
79set for each fan separately. Valid values range from 0 (stop) to 255 (full). 79set for each fan separately. Valid values range from 0 (stop) to 255 (full).
80PWM 1-3 support Thermal Cruise mode, in which the PWMs are automatically
81regulated to keep respectively temp 1-3 at a certain target temperature.
82See below for the description of the sysfs-interface.
80 83
81The w83791d has a global bit used to enable beeping from the speaker when an 84The w83791d has a global bit used to enable beeping from the speaker when an
82alarm is triggered as well as a bitmask to enable or disable the beep for 85alarm is triggered as well as a bitmask to enable or disable the beep for
@@ -116,9 +119,19 @@ chip-specific options are documented here.
116pwm[1-3]_enable - this file controls mode of fan/temperature control for 119pwm[1-3]_enable - this file controls mode of fan/temperature control for
117 fan 1-3. Fan/PWM 4-5 only support manual mode. 120 fan 1-3. Fan/PWM 4-5 only support manual mode.
118 * 1 Manual mode 121 * 1 Manual mode
119 * 2 Thermal Cruise mode (no further support) 122 * 2 Thermal Cruise mode
120 * 3 Fan Speed Cruise mode (no further support) 123 * 3 Fan Speed Cruise mode (no further support)
121 124
125temp[1-3]_target - defines the target temperature for Thermal Cruise mode.
126 Unit: millidegree Celsius
127 RW
128
129temp[1-3]_tolerance - temperature tolerance for Thermal Cruise mode.
130 Specifies an interval around the target temperature
131 in which the fan speed is not changed.
132 Unit: millidegree Celsius
133 RW
134
122Alarms bitmap vs. beep_mask bitmask 135Alarms bitmap vs. beep_mask bitmask
123------------------------------------ 136------------------------------------
124For legacy code using the alarms and beep_mask files: 137For legacy code using the alarms and beep_mask files:
@@ -146,7 +159,3 @@ tart2 : alarms: 0x020000 beep_mask: 0x080000 <== mismatch
146tart3 : alarms: 0x040000 beep_mask: 0x100000 <== mismatch 159tart3 : alarms: 0x040000 beep_mask: 0x100000 <== mismatch
147case_open : alarms: 0x001000 beep_mask: 0x001000 160case_open : alarms: 0x001000 beep_mask: 0x001000
148global_enable: alarms: -------- beep_mask: 0x800000 (modified via beep_enable) 161global_enable: alarms: -------- beep_mask: 0x800000 (modified via beep_enable)
149
150W83791D TODO:
151---------------
152Provide a patch for Thermal Cruise registers.