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| -rw-r--r-- | Documentation/hwmon/lm93 | 126 |
1 files changed, 8 insertions, 118 deletions
diff --git a/Documentation/hwmon/lm93 b/Documentation/hwmon/lm93 index 4e4a1dc1d2d..ac711f357fa 100644 --- a/Documentation/hwmon/lm93 +++ b/Documentation/hwmon/lm93 @@ -7,7 +7,7 @@ Supported chips: Addresses scanned: I2C 0x2c-0x2e Datasheet: http://www.national.com/ds.cgi/LM/LM93.pdf -Author: +Authors: Mark M. Hoffman <mhoffman@lightlink.com> Ported to 2.6 by Eric J. Bowersox <ericb@aspsys.com> Adapted to 2.6.20 by Carsten Emde <ce@osadl.org> @@ -16,7 +16,6 @@ Author: Module Parameters ----------------- -(specific to LM93) * init: integer Set to non-zero to force some initializations (default is 0). * disable_block: integer @@ -37,30 +36,13 @@ Module Parameters I.e. this parameter controls the VID pin input thresholds; if your VID inputs are not working, try changing this. The default value is "0". -(common among sensor drivers) -* force: short array (min = 1, max = 48) - List of adapter,address pairs to assume to be present. Autodetection - of the target device will still be attempted. Use one of the more - specific force directives below if this doesn't detect the device. -* force_lm93: short array (min = 1, max = 48) - List of adapter,address pairs which are unquestionably assumed to contain - a 'lm93' chip -* ignore: short array (min = 1, max = 48) - List of adapter,address pairs not to scan -* ignore_range: short array (min = 1, max = 48) - List of adapter,start-addr,end-addr triples not to scan -* probe: short array (min = 1, max = 48) - List of adapter,address pairs to scan additionally -* probe_range: short array (min = 1, max = 48) - List of adapter,start-addr,end-addr triples to scan additionally - Hardware Description -------------------- (from the datasheet) -The LM93, hardware monitor, has a two wire digital interface compatible with +The LM93 hardware monitor has a two wire digital interface compatible with SMBus 2.0. Using an 8-bit ADC, the LM93 measures the temperature of two remote diode connected transistors as well as its own die and 16 power supply voltages. To set fan speed, the LM93 has two PWM outputs that are each @@ -69,18 +51,12 @@ table based. The LM93 includes a digital filter that can be invoked to smooth temperature readings for better control of fan speed. The LM93 has four tachometer inputs to measure fan speed. Limit and status registers for all measured values are included. The LM93 builds upon the functionality of -previous motherboard management ASICs and uses some of the LM85 s features +previous motherboard management ASICs and uses some of the LM85's features (i.e. smart tachometer mode). It also adds measurement and control support for dynamic Vccp monitoring and PROCHOT. It is designed to monitor a dual processor Xeon class motherboard with a minimum of external components. -Driver Description ------------------- - -This driver implements support for the National Semiconductor LM93. - - User Interface -------------- @@ -101,7 +77,7 @@ These intervals can be found in the sysfs files prochot1_interval and prochot2_interval. The values in these files specify the intervals for #P1_PROCHOT and #P2_PROCHOT, respectively. Selecting a value not in this list will cause the driver to use the next largest interval. The available -intervals are: +intervals are (in seconds): #PROCHOT intervals: 0.73, 1.46, 2.9, 5.8, 11.7, 23.3, 46.6, 93.2, 186, 372 @@ -111,12 +87,12 @@ assert #P2_PROCHOT, and vice-versa. This mode is enabled by writing a non-zero integer to the sysfs file prochot_short. The LM93 can also override the #PROCHOT pins by driving a PWM signal onto -one or both of them. When overridden, the signal has a period of 3.56 mS, +one or both of them. When overridden, the signal has a period of 3.56 ms, a minimum pulse width of 5 clocks (at 22.5kHz => 6.25% duty cycle), and a maximum pulse width of 80 clocks (at 22.5kHz => 99.88% duty cycle). The sysfs files prochot1_override and prochot2_override contain boolean -intgers which enable or disable the override function for #P1_PROCHOT and +integers which enable or disable the override function for #P1_PROCHOT and #P2_PROCHOT, respectively. The sysfs file prochot_override_duty_cycle contains a value controlling the duty cycle for the PWM signal used when the override function is enabled. This value ranges from 0 to 15, with 0 @@ -166,7 +142,7 @@ frequency values are constrained by the hardware. Selecting a value which is not available will cause the driver to use the next largest value. Also note that this parameter has implications for the Smart Tach Mode (see above). -PWM Output Frequencies: 12, 36, 48, 60, 72, 84, 96, 22500 (h/w default) +PWM Output Frequencies (in Hz): 12, 36, 48, 60, 72, 84, 96, 22500 (default) Automatic PWM: @@ -178,7 +154,7 @@ individual control sources to which the PWM output is bound. The eight control sources are: temp1-temp4 (aka "zones" in the datasheet), #PROCHOT 1 & 2, and #VRDHOT 1 & 2. The bindings are expressed as a bitmask in the sysfs files pwm<n>_auto_channels, where a "1" enables the binding, and - a "0" disables it. The h/w default is 0x0f (all temperatures bound). +a "0" disables it. The h/w default is 0x0f (all temperatures bound). 0x01 - Temp 1 0x02 - Temp 2 @@ -324,89 +300,3 @@ LM93 Unique sysfs Files gpio input state of 8 GPIO pins; read-only - -Sample Configuration File -------------------------- - -Here is a sample LM93 chip config for sensors.conf: - ----------- cut here ---------- -chip "lm93-*" - -# VOLTAGE INPUTS - - # labels and scaling based on datasheet recommendations - label in1 "+12V1" - compute in1 @ * 12.945, @ / 12.945 - set in1_min 12 * 0.90 - set in1_max 12 * 1.10 - - label in2 "+12V2" - compute in2 @ * 12.945, @ / 12.945 - set in2_min 12 * 0.90 - set in2_max 12 * 1.10 - - label in3 "+12V3" - compute in3 @ * 12.945, @ / 12.945 - set in3_min 12 * 0.90 - set in3_max 12 * 1.10 - - label in4 "FSB_Vtt" - - label in5 "3GIO" - - label in6 "ICH_Core" - - label in7 "Vccp1" - - label in8 "Vccp2" - - label in9 "+3.3V" - set in9_min 3.3 * 0.90 - set in9_max 3.3 * 1.10 - - label in10 "+5V" - set in10_min 5.0 * 0.90 - set in10_max 5.0 * 1.10 - - label in11 "SCSI_Core" - - label in12 "Mem_Core" - - label in13 "Mem_Vtt" - - label in14 "Gbit_Core" - - # Assuming R1/R2 = 4.1143, and 3.3V reference - # -12V = (4.1143 + 1) * (@ - 3.3) + 3.3 - label in15 "-12V" - compute in15 @ * 5.1143 - 13.57719, (@ + 13.57719) / 5.1143 - set in15_min -12 * 0.90 - set in15_max -12 * 1.10 - - label in16 "+3.3VSB" - set in16_min 3.3 * 0.90 - set in16_max 3.3 * 1.10 - -# TEMPERATURE INPUTS - - label temp1 "CPU1" - label temp2 "CPU2" - label temp3 "LM93" - -# TACHOMETER INPUTS - - label fan1 "Fan1" - set fan1_min 3000 - label fan2 "Fan2" - set fan2_min 3000 - label fan3 "Fan3" - set fan3_min 3000 - label fan4 "Fan4" - set fan4_min 3000 - -# PWM OUTPUTS - - label pwm1 "CPU1" - label pwm2 "CPU2" - |