7 Addresses scanned: from Super I/O config space (8 I/O ports)
8 Datasheet: Not publicly available
11 Addresses scanned: from Super I/O config space (8 I/O ports)
12 Datasheet: Not publicly available
15 Addresses scanned: from Super I/O config space (8 I/O ports)
18 Addresses scanned: from Super I/O config space (8 I/O ports)
19 Datasheet: Not publicly available
22 Addresses scanned: from Super I/O config space (8 I/O ports)
23 Datasheet: Not publicly available
26 Addresses scanned: from Super I/O config space (8 I/O ports)
27 Datasheet: Once publicly available at the ITE website, but no longer
30 Addresses scanned: from Super I/O config space (8 I/O ports)
31 Datasheet: Once publicly available at the ITE website, but no longer
34 Addresses scanned: from Super I/O config space (8 I/O ports)
35 Datasheet: Once publicly available at the ITE website, but no longer
38 Addresses scanned: from Super I/O config space (8 I/O ports)
39 Datasheet: Once publicly available at the ITE website, but no longer
42 Addresses scanned: from Super I/O config space (8 I/O ports)
43 Datasheet: Not publicly available
46 Addresses scanned: from Super I/O config space (8 I/O ports)
47 Datasheet: Not publicly available
50 Addresses scanned: from Super I/O config space (8 I/O ports)
51 Datasheet: Not publicly available
54 Addresses scanned: from Super I/O config space (8 I/O ports)
55 Datasheet: Not publicly available
58 Addresses scanned: from Super I/O config space (8 I/O ports)
59 Datasheet: Not publicly available
62 Addresses scanned: from Super I/O config space (8 I/O ports)
63 Datasheet: Not publicly available
66 Addresses scanned: from Super I/O config space (8 I/O ports)
67 Datasheet: Not publicly available
70 Addresses scanned: from Super I/O config space (8 I/O ports)
71 Datasheet: Not publicly available
74 Addresses scanned: from Super I/O config space (8 I/O ports)
75 Datasheet: Not publicly available
78 Addresses scanned: from Super I/O config space (8 I/O ports)
79 Datasheet: Not publicly available
82 Addresses scanned: from Super I/O config space (8 I/O ports)
83 Datasheet: Not publicly available
84 * SiS950 [clone of IT8705F]
86 Addresses scanned: from Super I/O config space (8 I/O ports)
87 Datasheet: No longer be available
91 Jean Delvare <jdelvare@suse.de>
99 0 if vbat should report power on value, 1 if vbat should be updated after
100 each read. Default is 0. On some boards the battery voltage is provided
101 by either the battery or the onboard power supply. Only the first reading
102 at power on will be the actual battery voltage (which the chip does
103 automatically). On other boards the battery voltage is always fed to
104 the chip so can be read at any time. Excessive reading may decrease
105 battery life but no information is given in the datasheet.
107 * fix_pwm_polarity int
109 Force PWM polarity to active high (DANGEROUS). Some chips are
110 misconfigured by BIOS - PWM values would be inverted. This option tries
111 to fix this. Please contact your BIOS manufacturer and ask him for fix.
117 All the chips supported by this driver are LPC Super-I/O chips, accessed
118 through the LPC bus (ISA-like I/O ports). The IT8712F additionally has an
119 SMBus interface to the hardware monitoring functions. This driver no
120 longer supports this interface though, as it is slower and less reliable
121 than the ISA access, and was only available on a small number of
128 This driver implements support for the IT8603E, IT8620E, IT8622E, IT8623E,
129 IT8628E, IT8705F, IT8712F, IT8716F, IT8718F, IT8720F, IT8721F, IT8726F, IT8728F,
130 IT8732F, IT8758E, IT8771E, IT8772E, IT8781F, IT8782F, IT8783E/F, IT8786E,
131 IT8790E, and SiS950 chips.
133 These chips are 'Super I/O chips', supporting floppy disks, infrared ports,
134 joysticks and other miscellaneous stuff. For hardware monitoring, they
135 include an 'environment controller' with 3 temperature sensors, 3 fan
136 rotation speed sensors, 8 voltage sensors, associated alarms, and chassis
139 The IT8712F and IT8716F additionally feature VID inputs, used to report
140 the Vcore voltage of the processor. The early IT8712F have 5 VID pins,
141 the IT8716F and late IT8712F have 6. They are shared with other functions
142 though, so the functionality may not be available on a given system.
144 The IT8718F and IT8720F also features VID inputs (up to 8 pins) but the value
145 is stored in the Super-I/O configuration space. Due to technical limitations,
146 this value can currently only be read once at initialization time, so
147 the driver won't notice and report changes in the VID value. The two
148 upper VID bits share their pins with voltage inputs (in5 and in6) so you
149 can't have both on a given board.
151 The IT8716F, IT8718F, IT8720F, IT8721F/IT8758E and later IT8712F revisions
152 have support for 2 additional fans. The additional fans are supported by the
155 The IT8716F, IT8718F, IT8720F, IT8721F/IT8758E, IT8732F, IT8781F, IT8782F,
156 IT8783E/F, and late IT8712F and IT8705F also have optional 16-bit tachometer
157 counters for fans 1 to 3. This is better (no more fan clock divider mess) but
158 not compatible with the older chips and revisions. The 16-bit tachometer mode
159 is enabled by the driver when one of the above chips is detected.
161 The IT8726F is just bit enhanced IT8716F with additional hardware
162 for AMD power sequencing. Therefore the chip will appear as IT8716F
163 to userspace applications.
165 The IT8728F, IT8771E, and IT8772E are considered compatible with the IT8721F,
166 until a datasheet becomes available (hopefully.)
168 The IT8603E/IT8623E is a custom design, hardware monitoring part is similar to
169 IT8728F. It only supports 3 fans, 16-bit fan mode, and the full speed mode
170 of the fan is not supported (value 0 of pwmX_enable).
172 The IT8620E and IT8628E are custom designs, hardware monitoring part is similar
173 to IT8728F. It only supports 16-bit fan mode. Both chips support up to 6 fans.
175 The IT8790E supports up to 3 fans. 16-bit fan mode is always enabled.
177 The IT8732F supports a closed-loop mode for fan control, but this is not
178 currently implemented by the driver.
180 Temperatures are measured in degrees Celsius. An alarm is triggered once
181 when the Overtemperature Shutdown limit is crossed.
183 Fan rotation speeds are reported in RPM (rotations per minute). An alarm is
184 triggered if the rotation speed has dropped below a programmable limit. When
185 16-bit tachometer counters aren't used, fan readings can be divided by
186 a programmable divider (1, 2, 4 or 8) to give the readings more range or
187 accuracy. With a divider of 2, the lowest representable value is around
188 2600 RPM. Not all RPM values can accurately be represented, so some rounding
191 Voltage sensors (also known as IN sensors) report their values in volts. An
192 alarm is triggered if the voltage has crossed a programmable minimum or
193 maximum limit. Note that minimum in this case always means 'closest to
194 zero'; this is important for negative voltage measurements. On most chips, all
195 voltage inputs can measure voltages between 0 and 4.08 volts, with a resolution
196 of 0.016 volt. IT8603E, IT8721F/IT8758E and IT8728F can measure between 0 and
197 3.06 volts, with a resolution of 0.012 volt. IT8732F can measure between 0 and
198 2.8 volts with a resolution of 0.0109 volt. The battery voltage in8 does not
199 have limit registers.
201 On the IT8603E, IT8620E, IT8628E, IT8721F/IT8758E, IT8732F, IT8781F, IT8782F,
202 and IT8783E/F, some voltage inputs are internal and scaled inside the chip:
204 * in7 (optional for IT8781F, IT8782F, and IT8783E/F)
206 * in9 (relevant for IT8603E only)
207 The driver handles this transparently so user-space doesn't have to care.
209 The VID lines (IT8712F/IT8716F/IT8718F/IT8720F) encode the core voltage value:
210 the voltage level your processor should work with. This is hardcoded by
211 the mainboard and/or processor itself. It is a value in volts.
213 If an alarm triggers, it will remain triggered until the hardware register
214 is read at least once. This means that the cause for the alarm may already
215 have disappeared! Note that in the current implementation, all hardware
216 registers are read whenever any data is read (unless it is less than 1.5
217 seconds since the last update). This means that you can easily miss
220 Out-of-limit readings can also result in beeping, if the chip is properly
221 wired and configured. Beeping can be enabled or disabled per sensor type
222 (temperatures, voltages and fans.)
224 The IT87xx only updates its values each 1.5 seconds; reading it more often
225 will do no harm, but will return 'old' values.
227 To change sensor N to a thermistor, 'echo 4 > tempN_type' where N is 1, 2,
228 or 3. To change sensor N to a thermal diode, 'echo 3 > tempN_type'.
229 Give 0 for unused sensor. Any other value is invalid. To configure this at
230 startup, consult lm_sensors's /etc/sensors.conf. (4 = thermistor;
237 The fan speed control features are limited to manual PWM mode. Automatic
238 "Smart Guardian" mode control handling is only implemented for older chips
239 (see below.) However if you want to go for "manual mode" just write 1 to
242 If you are only able to control the fan speed with very small PWM values,
243 try lowering the PWM base frequency (pwm1_freq). Depending on the fan,
244 it may give you a somewhat greater control range. The same frequency is
245 used to drive all fan outputs, which is why pwm2_freq and pwm3_freq are
249 Automatic fan speed control (old interface)
250 -------------------------------------------
252 The driver supports the old interface to automatic fan speed control
253 which is implemented by IT8705F chips up to revision F and IT8712F
254 chips up to revision G.
256 This interface implements 4 temperature vs. PWM output trip points.
257 The PWM output of trip point 4 is always the maximum value (fan running
258 at full speed) while the PWM output of the other 3 trip points can be
259 freely chosen. The temperature of all 4 trip points can be freely chosen.
260 Additionally, trip point 1 has an hysteresis temperature attached, to
261 prevent fast switching between fan on and off.
263 The chip automatically computes the PWM output value based on the input
264 temperature, based on this simple rule: if the temperature value is
265 between trip point N and trip point N+1 then the PWM output value is
266 the one of trip point N. The automatic control mode is less flexible
267 than the manual control mode, but it reacts faster, is more robust and
268 doesn't use CPU cycles.
270 Trip points must be set properly before switching to automatic fan speed
271 control mode. The driver will perform basic integrity checks before
272 actually switching to automatic control mode.
275 Temperature offset attributes
276 -----------------------------
278 The driver supports temp[1-3]_offset sysfs attributes to adjust the reported
279 temperature for thermal diodes or diode-connected thermal transistors.
280 If a temperature sensor is configured for thermistors, the attribute values
281 are ignored. If the thermal sensor type is Intel PECI, the temperature offset
282 must be programmed to the critical CPU temperature.
287 Support for IT8607E, IT8665E, and IT8686E is preliminary. Voltage readings,
288 temperature readings, fan control, and fan speed measurements may be wrong
289 and/or missing. Fan control and fan speed may be enabled and reported for
290 non-existing fans. Please report any problems and inconsistencies.
292 Reporting information for unsupported chips
293 -------------------------------------------
295 If the chip in your system is not yet supported by the driver, please provide
296 the following information.
298 First, run sensors-detect. It will tell you something like
300 Probing for Super-I/O at 0x2e/0x2f
302 Trying family `ITE'... Yes
303 Found unknown chip with ID 0x8665
304 (logical device 4 has address 0x290, could be sensors)
306 With this information, run the following commands.
308 sudo isadump -k 0x87,0x01,0x55,0x55 0x2e 0x2f 7
309 sudo isadump 0x295 0x296
311 and report the results.
313 The addresses in the first command are from "Probing for Super-I/O at
314 0x2e/0x2f". Use those addresses in the first command.
315 sudo isadump -k 0x87,0x01,0x55,0x55 0x2e 0x2f 7
317 The addresses in the second command are from "has address 0x290".
318 Add 5 and 6 to this address for the next command.
319 sudo isadump 0x295 0x296
321 Next, force-install the driver by providing one of the already supported chips
322 as forced ID. Useful IDs to test are 0x8622, 0x8628, 0x8728, and 0x8732, though
323 feel free to test more IDs. For each ID, instantiate the driver as follows
324 (this example is instantiating driver with ID 0x8622).
325 sudo modprobe it87 force_id=0x8622
326 After entering this command, run the "sensors" command and provide the output.
327 Then unload the driver with
328 sudo modprobe -r it87
329 Repeat with different chip IDs, and report each result.
331 Please also report your board type as well as voltages and fan settings from
332 the BIOS. If possible, connect fans to different fan headers and let us know
333 if all fans are detected and reported.
335 This information _might_ give us enough information to add experimental support
336 for the chip in question. No guarantees, though - unless a datasheet is
337 available, something is likely to be wrong.