diff options
Diffstat (limited to 'Documentation/hwmon')
| -rw-r--r-- | Documentation/hwmon/coretemp | 4 | ||||
| -rw-r--r-- | Documentation/hwmon/fscher | 169 |
2 files changed, 3 insertions, 170 deletions
diff --git a/Documentation/hwmon/coretemp b/Documentation/hwmon/coretemp index dbbe6c7025b0..92267b62db59 100644 --- a/Documentation/hwmon/coretemp +++ b/Documentation/hwmon/coretemp @@ -4,7 +4,9 @@ Kernel driver coretemp Supported chips: * All Intel Core family Prefix: 'coretemp' - CPUID: family 0x6, models 0xe, 0xf, 0x16, 0x17 + CPUID: family 0x6, models 0xe (Pentium M DC), 0xf (Core 2 DC 65nm), + 0x16 (Core 2 SC 65nm), 0x17 (Penryn 45nm), + 0x1a (Nehalem), 0x1c (Atom), 0x1e (Lynnfield) Datasheet: Intel 64 and IA-32 Architectures Software Developer's Manual Volume 3A: System Programming Guide http://softwarecommunity.intel.com/Wiki/Mobility/720.htm diff --git a/Documentation/hwmon/fscher b/Documentation/hwmon/fscher deleted file mode 100644 index 64031659aff3..000000000000 --- a/Documentation/hwmon/fscher +++ /dev/null @@ -1,169 +0,0 @@ -Kernel driver fscher -==================== - -Supported chips: - * Fujitsu-Siemens Hermes chip - Prefix: 'fscher' - Addresses scanned: I2C 0x73 - -Authors: - Reinhard Nissl <rnissl@gmx.de> based on work - from Hermann Jung <hej@odn.de>, - Frodo Looijaard <frodol@dds.nl>, - Philip Edelbrock <phil@netroedge.com> - -Description ------------ - -This driver implements support for the Fujitsu-Siemens Hermes chip. It is -described in the 'Register Set Specification BMC Hermes based Systemboard' -from Fujitsu-Siemens. - -The Hermes chip implements a hardware-based system management, e.g. for -controlling fan speed and core voltage. There is also a watchdog counter on -the chip which can trigger an alarm and even shut the system down. - -The chip provides three temperature values (CPU, motherboard and -auxiliary), three voltage values (+12V, +5V and battery) and three fans -(power supply, CPU and auxiliary). - -Temperatures are measured in degrees Celsius. The resolution is 1 degree. - -Fan rotation speeds are reported in RPM (rotations per minute). The value -can be divided by a programmable divider (1, 2 or 4) which is stored on -the chip. - -Voltage sensors (also known as "in" sensors) report their values in volts. - -All values are reported as final values from the driver. There is no need -for further calculations. - - -Detailed description --------------------- - -Below you'll find a single line description of all the bit values. With -this information, you're able to decode e. g. alarms, wdog, etc. To make -use of the watchdog, you'll need to set the watchdog time and enable the -watchdog. After that it is necessary to restart the watchdog time within -the specified period of time, or a system reset will occur. - -* revision - READING & 0xff = 0x??: HERMES revision identification - -* alarms - READING & 0x80 = 0x80: CPU throttling active - READING & 0x80 = 0x00: CPU running at full speed - - READING & 0x10 = 0x10: software event (see control:1) - READING & 0x10 = 0x00: no software event - - READING & 0x08 = 0x08: watchdog event (see wdog:2) - READING & 0x08 = 0x00: no watchdog event - - READING & 0x02 = 0x02: thermal event (see temp*:1) - READING & 0x02 = 0x00: no thermal event - - READING & 0x01 = 0x01: fan event (see fan*:1) - READING & 0x01 = 0x00: no fan event - - READING & 0x13 ! 0x00: ALERT LED is flashing - -* control - READING & 0x01 = 0x01: software event - READING & 0x01 = 0x00: no software event - - WRITING & 0x01 = 0x01: set software event - WRITING & 0x01 = 0x00: clear software event - -* watchdog_control - READING & 0x80 = 0x80: power off on watchdog event while thermal event - READING & 0x80 = 0x00: watchdog power off disabled (just system reset enabled) - - READING & 0x40 = 0x40: watchdog timebase 60 seconds (see also wdog:1) - READING & 0x40 = 0x00: watchdog timebase 2 seconds - - READING & 0x10 = 0x10: watchdog enabled - READING & 0x10 = 0x00: watchdog disabled - - WRITING & 0x80 = 0x80: enable "power off on watchdog event while thermal event" - WRITING & 0x80 = 0x00: disable "power off on watchdog event while thermal event" - - WRITING & 0x40 = 0x40: set watchdog timebase to 60 seconds - WRITING & 0x40 = 0x00: set watchdog timebase to 2 seconds - - WRITING & 0x20 = 0x20: disable watchdog - - WRITING & 0x10 = 0x10: enable watchdog / restart watchdog time - -* watchdog_state - READING & 0x02 = 0x02: watchdog system reset occurred - READING & 0x02 = 0x00: no watchdog system reset occurred - - WRITING & 0x02 = 0x02: clear watchdog event - -* watchdog_preset - READING & 0xff = 0x??: configured watch dog time in units (see wdog:3 0x40) - - WRITING & 0xff = 0x??: configure watch dog time in units - -* in* (0: +5V, 1: +12V, 2: onboard 3V battery) - READING: actual voltage value - -* temp*_status (1: CPU sensor, 2: onboard sensor, 3: auxiliary sensor) - READING & 0x02 = 0x02: thermal event (overtemperature) - READING & 0x02 = 0x00: no thermal event - - READING & 0x01 = 0x01: sensor is working - READING & 0x01 = 0x00: sensor is faulty - - WRITING & 0x02 = 0x02: clear thermal event - -* temp*_input (1: CPU sensor, 2: onboard sensor, 3: auxiliary sensor) - READING: actual temperature value - -* fan*_status (1: power supply fan, 2: CPU fan, 3: auxiliary fan) - READING & 0x04 = 0x04: fan event (fan fault) - READING & 0x04 = 0x00: no fan event - - WRITING & 0x04 = 0x04: clear fan event - -* fan*_div (1: power supply fan, 2: CPU fan, 3: auxiliary fan) - Divisors 2,4 and 8 are supported, both for reading and writing - -* fan*_pwm (1: power supply fan, 2: CPU fan, 3: auxiliary fan) - READING & 0xff = 0x00: fan may be switched off - READING & 0xff = 0x01: fan must run at least at minimum speed (supply: 6V) - READING & 0xff = 0xff: fan must run at maximum speed (supply: 12V) - READING & 0xff = 0x??: fan must run at least at given speed (supply: 6V..12V) - - WRITING & 0xff = 0x00: fan may be switched off - WRITING & 0xff = 0x01: fan must run at least at minimum speed (supply: 6V) - WRITING & 0xff = 0xff: fan must run at maximum speed (supply: 12V) - WRITING & 0xff = 0x??: fan must run at least at given speed (supply: 6V..12V) - -* fan*_input (1: power supply fan, 2: CPU fan, 3: auxiliary fan) - READING: actual RPM value - - -Limitations ------------ - -* Measuring fan speed -It seems that the chip counts "ripples" (typical fans produce 2 ripples per -rotation while VERAX fans produce 18) in a 9-bit register. This register is -read out every second, then the ripple prescaler (2, 4 or 8) is applied and -the result is stored in the 8 bit output register. Due to the limitation of -the counting register to 9 bits, it is impossible to measure a VERAX fan -properly (even with a prescaler of 8). At its maximum speed of 3500 RPM the -fan produces 1080 ripples per second which causes the counting register to -overflow twice, leading to only 186 RPM. - -* Measuring input voltages -in2 ("battery") reports the voltage of the onboard lithium battery and not -+3.3V from the power supply. - -* Undocumented features -Fujitsu-Siemens Computers has not documented all features of the chip so -far. Their software, System Guard, shows that there are a still some -features which cannot be controlled by this implementation. |