^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) Kernel driver w83627ehf
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) =======================
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) Supported chips:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Winbond W83627EHF/EHG (ISA access ONLY)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) Prefix: 'w83627ehf'
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) Addresses scanned: ISA address retrieved from Super I/O registers
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) Datasheet: not available
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) * Winbond W83627DHG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) Prefix: 'w83627dhg'
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) Addresses scanned: ISA address retrieved from Super I/O registers
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) Datasheet: not available
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) * Winbond W83627DHG-P
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) Prefix: 'w83627dhg'
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) Addresses scanned: ISA address retrieved from Super I/O registers
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) Datasheet: not available
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) * Winbond W83627UHG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) Prefix: 'w83627uhg'
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) Addresses scanned: ISA address retrieved from Super I/O registers
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) Datasheet: available from www.nuvoton.com
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) * Winbond W83667HG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) Prefix: 'w83667hg'
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) Addresses scanned: ISA address retrieved from Super I/O registers
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) Datasheet: not available
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) * Winbond W83667HG-B
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) Prefix: 'w83667hg'
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) Addresses scanned: ISA address retrieved from Super I/O registers
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) Datasheet: Available from Nuvoton upon request
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) * Nuvoton NCT6775F/W83667HG-I
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) Prefix: 'nct6775'
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) Addresses scanned: ISA address retrieved from Super I/O registers
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) Datasheet: Available from Nuvoton upon request
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) * Nuvoton NCT6776F
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) Prefix: 'nct6776'
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) Addresses scanned: ISA address retrieved from Super I/O registers
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) Datasheet: Available from Nuvoton upon request
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) Authors:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) - Jean Delvare <jdelvare@suse.de>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) - Yuan Mu (Winbond)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) - Rudolf Marek <r.marek@assembler.cz>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) - David Hubbard <david.c.hubbard@gmail.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) - Gong Jun <JGong@nuvoton.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) Description
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) -----------
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) This driver implements support for the Winbond W83627EHF, W83627EHG,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) W83627DHG, W83627DHG-P, W83627UHG, W83667HG, W83667HG-B, W83667HG-I
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) (NCT6775F), and NCT6776F super I/O chips. We will refer to them collectively
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) as Winbond chips.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) The chips implement 3 to 4 temperature sensors (9 for NCT6775F and NCT6776F),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) 2 to 5 fan rotation speed sensors, 8 to 10 analog voltage sensors, one VID
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) (except for 627UHG), alarms with beep warnings (control unimplemented),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) and some automatic fan regulation strategies (plus manual fan control mode).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) The temperature sensor sources on W82677HG-B, NCT6775F, and NCT6776F are
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) configurable. temp4 and higher attributes are only reported if its temperature
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) source differs from the temperature sources of the already reported temperature
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) sensors. The configured source for each of the temperature sensors is provided
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) in tempX_label.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) Temperatures are measured in degrees Celsius and measurement resolution is 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) degC for temp1 and 0.5 degC for temp2 and temp3. For temp4 and higher,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) resolution is 1 degC for W83667HG-B and 0.0 degC for NCT6775F and NCT6776F.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) An alarm is triggered when the temperature gets higher than high limit;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) it stays on until the temperature falls below the hysteresis value.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) Alarms are only supported for temp1, temp2, and temp3.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) Fan rotation speeds are reported in RPM (rotations per minute). An alarm is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) triggered if the rotation speed has dropped below a programmable limit. Fan
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) readings can be divided by a programmable divider (1, 2, 4, 8, 16, 32, 64 or
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 128) to give the readings more range or accuracy. The driver sets the most
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) suitable fan divisor itself. Some fans might not be present because they
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) share pins with other functions.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) Voltage sensors (also known as IN sensors) report their values in millivolts.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) An alarm is triggered if the voltage has crossed a programmable minimum
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) or maximum limit.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) The driver supports automatic fan control mode known as Thermal Cruise.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) In this mode, the chip attempts to keep the measured temperature in a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) predefined temperature range. If the temperature goes out of range, fan
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) is driven slower/faster to reach the predefined range again.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) The mode works for fan1-fan4. Mapping of temperatures to pwm outputs is as
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) follows::
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) temp1 -> pwm1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) temp2 -> pwm2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) temp3 -> pwm3 (not on 627UHG)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) prog -> pwm4 (not on 667HG and 667HG-B; the programmable setting is not
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) supported by the driver)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) /sys files
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) ----------
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) name
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) this is a standard hwmon device entry, it contains the name of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) the device (see the prefix in the list of supported devices at
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) the top of this file)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) pwm[1-4]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) this file stores PWM duty cycle or DC value (fan speed) in range:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 0 (stop) to 255 (full)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) pwm[1-4]_enable
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) this file controls mode of fan/temperature control:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) * 1 Manual mode, write to pwm file any value 0-255 (full speed)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) * 2 "Thermal Cruise" mode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) * 3 "Fan Speed Cruise" mode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) * 4 "Smart Fan III" mode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) * 5 "Smart Fan IV" mode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) SmartFan III mode is not supported on NCT6776F.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) SmartFan IV mode is configurable only if it was configured at system
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) startup, and is only supported for W83677HG-B, NCT6775F, and NCT6776F.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) SmartFan IV operational parameters can not be configured at this time,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) and the various pwm attributes are not used in SmartFan IV mode.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) The attributes can be written to, which is useful if you plan to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) configure the system for a different pwm mode. However, the information
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) returned when reading pwm attributes is unrelated to SmartFan IV
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) operation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) pwm[1-4]_mode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) controls if output is PWM or DC level
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) * 0 DC output (0 - 12v)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) * 1 PWM output
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) Thermal Cruise mode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) -------------------
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) If the temperature is in the range defined by:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) pwm[1-4]_target
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) set target temperature, unit millidegree Celsius
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) (range 0 - 127000)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) pwm[1-4]_tolerance
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) tolerance, unit millidegree Celsius (range 0 - 15000)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) there are no changes to fan speed. Once the temperature leaves the interval,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) fan speed increases (temp is higher) or decreases if lower than desired.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) There are defined steps and times, but not exported by the driver yet.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) pwm[1-4]_min_output
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) minimum fan speed (range 1 - 255), when the temperature
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) is below defined range.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) pwm[1-4]_stop_time
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) how many milliseconds [ms] must elapse to switch
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) corresponding fan off. (when the temperature was below
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) defined range).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) pwm[1-4]_start_output
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) minimum fan speed (range 1 - 255) when spinning up
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) pwm[1-4]_step_output
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) rate of fan speed change (1 - 255)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) pwm[1-4]_stop_output
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) minimum fan speed (range 1 - 255) when spinning down
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) pwm[1-4]_max_output
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) maximum fan speed (range 1 - 255), when the temperature
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) is above defined range.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) Note: last six functions are influenced by other control bits, not yet exported
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) by the driver, so a change might not have any effect.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) Implementation Details
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) ----------------------
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) Future driver development should bear in mind that the following registers have
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) different functions on the 627EHF and the 627DHG. Some registers also have
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) different power-on default values, but BIOS should already be loading
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) appropriate defaults. Note that bank selection must be performed as is currently
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) done in the driver for all register addresses.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) ========================= =====================================================
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) Register(s) Meaning
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) ========================= =====================================================
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 0x49 only on DHG, selects temperature source for AUX fan,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) CPU fan0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 0x4a not completely documented for the EHF and the DHG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) documentation assigns different behavior to bits 7
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) and 6, including extending the temperature input
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) selection to SmartFan I, not just SmartFan III.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) Testing on the EHF will reveal whether they are
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) compatible or not.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 0x58 Chip ID: 0xa1=EHF 0xc1=DHG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 0x5e only on DHG, has bits to enable "current mode"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) temperature detection and critical temperature
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) protection
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 0x45b only on EHF, bit 3, vin4 alarm (EHF supports 10
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) inputs, only 9 on DHG)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 0x552 only on EHF, vin4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 0x558 only on EHF, vin4 high limit
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 0x559 only on EHF, vin4 low limit
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 0x6b only on DHG, SYS fan critical temperature
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 0x6c only on DHG, CPU fan0 critical temperature
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 0x6d only on DHG, AUX fan critical temperature
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 0x6e only on DHG, CPU fan1 critical temperature
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 0x50-0x55 and 0x650-0x657 marked as:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) - "Test Register" for the EHF
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) - "Reserved Register" for the DHG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) ========================= =====================================================
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) The DHG also supports PECI, where the DHG queries Intel CPU temperatures, and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) the ICH8 southbridge gets that data via PECI from the DHG, so that the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) southbridge drives the fans. And the DHG supports SST, a one-wire serial bus.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) The DHG-P has an additional automatic fan speed control mode named Smart Fan
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) (TM) III+. This mode is not yet supported by the driver.
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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