€•Ÿ>      Œsphinx.addnodes”Œdocument”“”)”}”(Œ	rawsource”Œ ”Œchildren”]”(Œtranslations”ŒLanguagesNode”“”)”}”(hhh]”(h Œpending_xref”“”)”}”(hhh]”Œdocutils.nodes”ŒText”“”ŒChinese (Simplified)”…””}”Œparent”hsbaŒ
attributes”}”(Œids”]”Œclasses”]”Œnames”]”Œdupnames”]”Œbackrefs”]”Œ	refdomain”Œstd”Œreftype”Œdoc”Œ	reftarget”Œ/translations/zh_CN/hwmon/g762”Œmodname”NŒ	classname”NŒrefexplicit”ˆuŒtagname”hhhubh)”}”(hhh]”hŒChinese (Traditional)”…””}”hh2sbah}”(h]”h ]”h"]”h$]”h&]”Œ	refdomain”h)Œreftype”h+Œ	reftarget”Œ/translations/zh_TW/hwmon/g762”Œmodname”NŒ	classname”NŒrefexplicit”ˆuh1hhhubh)”}”(hhh]”hŒItalian”…””}”hhFsbah}”(h]”h ]”h"]”h$]”h&]”Œ	refdomain”h)Œreftype”h+Œ	reftarget”Œ/translations/it_IT/hwmon/g762”Œmodname”NŒ	classname”NŒrefexplicit”ˆuh1hhhubh)”}”(hhh]”hŒJapanese”…””}”hhZsbah}”(h]”h ]”h"]”h$]”h&]”Œ	refdomain”h)Œreftype”h+Œ	reftarget”Œ/translations/ja_JP/hwmon/g762”Œmodname”NŒ	classname”NŒrefexplicit”ˆuh1hhhubh)”}”(hhh]”hŒKorean”…””}”hhnsbah}”(h]”h ]”h"]”h$]”h&]”Œ	refdomain”h)Œreftype”h+Œ	reftarget”Œ/translations/ko_KR/hwmon/g762”Œmodname”NŒ	classname”NŒrefexplicit”ˆuh1hhhubh)”}”(hhh]”hŒPortuguese (Brazilian)”…””}”hh‚sbah}”(h]”h ]”h"]”h$]”h&]”Œ	refdomain”h)Œreftype”h+Œ	reftarget”Œ/translations/pt_BR/hwmon/g762”Œmodname”NŒ	classname”NŒrefexplicit”ˆuh1hhhubh)”}”(hhh]”hŒSpanish”…””}”hh–sbah}”(h]”h ]”h"]”h$]”h&]”Œ	refdomain”h)Œreftype”h+Œ	reftarget”Œ/translations/sp_SP/hwmon/g762”Œmodname”NŒ	classname”NŒrefexplicit”ˆuh1hhhubeh}”(h]”h ]”h"]”h$]”h&]”Œcurrent_language”ŒEnglish”uh1h
hhŒ	_document”hŒsource”NŒline”NubhŒsection”“”)”}”(hhh]”(hŒtitle”“”)”}”(hŒKernel driver g762”h]”hŒKernel driver g762”…””}”(hh¼h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hºhh·h²hh³Œ8/var/lib/git/docbuild/linux/Documentation/hwmon/g762.rst”h´KubhŒ	paragraph”“”)”}”(hŒ¹The GMT G762 Fan Speed PWM Controller is connected directly to a fan
and performs closed-loop or open-loop control of the fan speed. Two
modes - PWM or DC - are supported by the device.”h]”hŒ¹The GMT G762 Fan Speed PWM Controller is connected directly to a fan
and performs closed-loop or open-loop control of the fan speed. Two
modes - PWM or DC - are supported by the device.”…””}”(hhÍh²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´Khh·h²hubhÌ)”}”(hŒÅFor additional information, a detailed datasheet is available at
http://natisbad.org/NAS/ref/GMT_EDS-762_763-080710-0.2.pdf. sysfs
bindings are described in Documentation/hwmon/sysfs-interface.rst.”h]”(hŒAFor additional information, a detailed datasheet is available at
”…””}”(hhÛh²hh³Nh´NubhŒ	reference”“”)”}”(hŒ:http://natisbad.org/NAS/ref/GMT_EDS-762_763-080710-0.2.pdf”h]”hŒ:http://natisbad.org/NAS/ref/GMT_EDS-762_763-080710-0.2.pdf”…””}”(hhåh²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”Œrefuri”hçuh1hãhhÛubhŒJ. sysfs
bindings are described in Documentation/hwmon/sysfs-interface.rst.”…””}”(hhÛh²hh³Nh´Nubeh}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´Khh·h²hubhÌ)”}”(hŒøThe following entries are available to the user in a subdirectory of
/sys/bus/i2c/drivers/g762/ to control the operation of the device.
This can be done manually using the following entries but is usually
done via a userland daemon like fancontrol.”h]”hŒøThe following entries are available to the user in a subdirectory of
/sys/bus/i2c/drivers/g762/ to control the operation of the device.
This can be done manually using the following entries but is usually
done via a userland daemon like fancontrol.”…””}”(hhþh²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´Khh·h²hubhÌ)”}”(hX€  Note that those entries do not provide ways to setup the specific
hardware characteristics of the system (reference clock, pulses per
fan revolution, ...); Those can be modified via devicetree bindings
documented in Documentation/devicetree/bindings/hwmon/gmt,g762.yaml or
using a specific platform_data structure in board initialization
file (see include/linux/platform_data/g762.h).”h]”hX€  Note that those entries do not provide ways to setup the specific
hardware characteristics of the system (reference clock, pulses per
fan revolution, ...); Those can be modified via devicetree bindings
documented in Documentation/devicetree/bindings/hwmon/gmt,g762.yaml or
using a specific platform_data structure in board initialization
file (see include/linux/platform_data/g762.h).”…””}”(hj  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´Khh·h²hubhŒblock_quote”“”)”}”(hXá  fan1_target:
          set desired fan speed. This only makes sense in closed-loop
          fan speed control (i.e. when pwm1_enable is set to 2).

fan1_input:
          provide current fan rotation value in RPM as reported by
          the fan to the device.

fan1_div:
          fan clock divisor. Supported value are 1, 2, 4 and 8.

fan1_pulses:
          number of pulses per fan revolution. Supported values
          are 2 and 4.

fan1_fault:
          reports fan failure, i.e. no transition on fan gear pin for
          about 0.7s (if the fan is not voluntarily set off).

fan1_alarm:
          in closed-loop control mode, if fan RPM value is 25% out
          of the programmed value for over 6 seconds 'fan1_alarm' is
          set to 1.

pwm1_enable:
          set current fan speed control mode i.e. 1 for manual fan
          speed control (open-loop) via pwm1 described below, 2 for
          automatic fan speed control (closed-loop) via fan1_target
          above.

pwm1_mode:
          set or get fan driving mode: 1 for PWM mode, 0 for DC mode.

pwm1:
          get or set PWM fan control value in open-loop mode. This is an
          integer value between 0 and 255. 0 stops the fan, 255 makes
          it run at full speed.
”h]”hŒdefinition_list”“”)”}”(hhh]”(hŒdefinition_list_item”“”)”}”(hŒ€fan1_target:
set desired fan speed. This only makes sense in closed-loop
fan speed control (i.e. when pwm1_enable is set to 2).
”h]”(hŒterm”“”)”}”(hŒfan1_target:”h]”hŒfan1_target:”…””}”(hj-  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1j+  h³hÊh´Khj'  ubhŒ
definition”“”)”}”(hhh]”hÌ)”}”(hŒrset desired fan speed. This only makes sense in closed-loop
fan speed control (i.e. when pwm1_enable is set to 2).”h]”hŒrset desired fan speed. This only makes sense in closed-loop
fan speed control (i.e. when pwm1_enable is set to 2).”…””}”(hj@  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´Khj=  ubah}”(h]”h ]”h"]”h$]”h&]”uh1j;  hj'  ubeh}”(h]”h ]”h"]”h$]”h&]”uh1j%  h³hÊh´Khj"  ubj&  )”}”(hŒ\fan1_input:
provide current fan rotation value in RPM as reported by
the fan to the device.
”h]”(j,  )”}”(hŒfan1_input:”h]”hŒfan1_input:”…””}”(hj^  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1j+  h³hÊh´KhjZ  ubj<  )”}”(hhh]”hÌ)”}”(hŒOprovide current fan rotation value in RPM as reported by
the fan to the device.”h]”hŒOprovide current fan rotation value in RPM as reported by
the fan to the device.”…””}”(hjo  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´Khjl  ubah}”(h]”h ]”h"]”h$]”h&]”uh1j;  hjZ  ubeh}”(h]”h ]”h"]”h$]”h&]”uh1j%  h³hÊh´Khj"  ubj&  )”}”(hŒ@fan1_div:
fan clock divisor. Supported value are 1, 2, 4 and 8.
”h]”(j,  )”}”(hŒ	fan1_div:”h]”hŒ	fan1_div:”…””}”(hj  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1j+  h³hÊh´K!hj‰  ubj<  )”}”(hhh]”hÌ)”}”(hŒ5fan clock divisor. Supported value are 1, 2, 4 and 8.”h]”hŒ5fan clock divisor. Supported value are 1, 2, 4 and 8.”…””}”(hjž  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´K!hj›  ubah}”(h]”h ]”h"]”h$]”h&]”uh1j;  hj‰  ubeh}”(h]”h ]”h"]”h$]”h&]”uh1j%  h³hÊh´K!hj"  ubj&  )”}”(hŒPfan1_pulses:
number of pulses per fan revolution. Supported values
are 2 and 4.
”h]”(j,  )”}”(hŒfan1_pulses:”h]”hŒfan1_pulses:”…””}”(hj¼  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1j+  h³hÊh´K%hj¸  ubj<  )”}”(hhh]”hÌ)”}”(hŒBnumber of pulses per fan revolution. Supported values
are 2 and 4.”h]”hŒBnumber of pulses per fan revolution. Supported values
are 2 and 4.”…””}”(hjÍ  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´K$hjÊ  ubah}”(h]”h ]”h"]”h$]”h&]”uh1j;  hj¸  ubeh}”(h]”h ]”h"]”h$]”h&]”uh1j%  h³hÊh´K%hj"  ubj&  )”}”(hŒ|fan1_fault:
reports fan failure, i.e. no transition on fan gear pin for
about 0.7s (if the fan is not voluntarily set off).
”h]”(j,  )”}”(hŒfan1_fault:”h]”hŒfan1_fault:”…””}”(hjë  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1j+  h³hÊh´K)hjç  ubj<  )”}”(hhh]”hÌ)”}”(hŒoreports fan failure, i.e. no transition on fan gear pin for
about 0.7s (if the fan is not voluntarily set off).”h]”hŒoreports fan failure, i.e. no transition on fan gear pin for
about 0.7s (if the fan is not voluntarily set off).”…””}”(hjü  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´K(hjù  ubah}”(h]”h ]”h"]”h$]”h&]”uh1j;  hjç  ubeh}”(h]”h ]”h"]”h$]”h&]”uh1j%  h³hÊh´K)hj"  ubj&  )”}”(hŒŠfan1_alarm:
in closed-loop control mode, if fan RPM value is 25% out
of the programmed value for over 6 seconds 'fan1_alarm' is
set to 1.
”h]”(j,  )”}”(hŒfan1_alarm:”h]”hŒfan1_alarm:”…””}”(hj  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1j+  h³hÊh´K.hj  ubj<  )”}”(hhh]”hÌ)”}”(hŒ}in closed-loop control mode, if fan RPM value is 25% out
of the programmed value for over 6 seconds 'fan1_alarm' is
set to 1.”h]”hŒin closed-loop control mode, if fan RPM value is 25% out
of the programmed value for over 6 seconds â€˜fan1_alarmâ€™ is
set to 1.”…””}”(hj+  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´K,hj(  ubah}”(h]”h ]”h"]”h$]”h&]”uh1j;  hj  ubeh}”(h]”h ]”h"]”h$]”h&]”uh1j%  h³hÊh´K.hj"  ubj&  )”}”(hŒÁpwm1_enable:
set current fan speed control mode i.e. 1 for manual fan
speed control (open-loop) via pwm1 described below, 2 for
automatic fan speed control (closed-loop) via fan1_target
above.
”h]”(j,  )”}”(hŒpwm1_enable:”h]”hŒpwm1_enable:”…””}”(hjI  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1j+  h³hÊh´K4hjE  ubj<  )”}”(hhh]”hÌ)”}”(hŒ³set current fan speed control mode i.e. 1 for manual fan
speed control (open-loop) via pwm1 described below, 2 for
automatic fan speed control (closed-loop) via fan1_target
above.”h]”hŒ³set current fan speed control mode i.e. 1 for manual fan
speed control (open-loop) via pwm1 described below, 2 for
automatic fan speed control (closed-loop) via fan1_target
above.”…””}”(hjZ  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´K1hjW  ubah}”(h]”h ]”h"]”h$]”h&]”uh1j;  hjE  ubeh}”(h]”h ]”h"]”h$]”h&]”uh1j%  h³hÊh´K4hj"  ubj&  )”}”(hŒGpwm1_mode:
set or get fan driving mode: 1 for PWM mode, 0 for DC mode.
”h]”(j,  )”}”(hŒ
pwm1_mode:”h]”hŒ
pwm1_mode:”…””}”(hjx  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1j+  h³hÊh´K7hjt  ubj<  )”}”(hhh]”hÌ)”}”(hŒ;set or get fan driving mode: 1 for PWM mode, 0 for DC mode.”h]”hŒ;set or get fan driving mode: 1 for PWM mode, 0 for DC mode.”…””}”(hj‰  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´K7hj†  ubah}”(h]”h ]”h"]”h$]”h&]”uh1j;  hjt  ubeh}”(h]”h ]”h"]”h$]”h&]”uh1j%  h³hÊh´K7hj"  ubj&  )”}”(hŒ—pwm1:
get or set PWM fan control value in open-loop mode. This is an
integer value between 0 and 255. 0 stops the fan, 255 makes
it run at full speed.
”h]”(j,  )”}”(hŒpwm1:”h]”hŒpwm1:”…””}”(hj§  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1j+  h³hÊh´K<hj£  ubj<  )”}”(hhh]”hÌ)”}”(hŒget or set PWM fan control value in open-loop mode. This is an
integer value between 0 and 255. 0 stops the fan, 255 makes
it run at full speed.”h]”hŒget or set PWM fan control value in open-loop mode. This is an
integer value between 0 and 255. 0 stops the fan, 255 makes
it run at full speed.”…””}”(hj¸  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´K:hjµ  ubah}”(h]”h ]”h"]”h$]”h&]”uh1j;  hj£  ubeh}”(h]”h ]”h"]”h$]”h&]”uh1j%  h³hÊh´K<hj"  ubeh}”(h]”h ]”h"]”h$]”h&]”uh1j   hj  ubah}”(h]”h ]”h"]”h$]”h&]”uh1j  h³hÊh´Khh·h²hubhÌ)”}”(hX  Both in PWM mode ('pwm1_mode' set to 1) and DC mode ('pwm1_mode' set to 0),
when current fan speed control mode is open-loop ('pwm1_enable' set to 1),
the fan speed is programmed by setting a value between 0 and 255 via 'pwm1'
entry (0 stops the fan, 255 makes it run at full speed). In closed-loop mode
('pwm1_enable' set to 2), the expected rotation speed in RPM can be passed to
the chip via 'fan1_target'. In closed-loop mode, the target speed is compared
with current speed (available via 'fan1_input') by the device and a feedback
is performed to match that target value. The fan speed value is computed
based on the parameters associated with the physical characteristics of the
system: a reference clock source frequency, a number of pulses per fan
revolution, etc.”h]”hX!  Both in PWM mode (â€˜pwm1_modeâ€™ set to 1) and DC mode (â€˜pwm1_modeâ€™ set to 0),
when current fan speed control mode is open-loop (â€˜pwm1_enableâ€™ set to 1),
the fan speed is programmed by setting a value between 0 and 255 via â€˜pwm1â€™
entry (0 stops the fan, 255 makes it run at full speed). In closed-loop mode
(â€˜pwm1_enableâ€™ set to 2), the expected rotation speed in RPM can be passed to
the chip via â€˜fan1_targetâ€™. In closed-loop mode, the target speed is compared
with current speed (available via â€˜fan1_inputâ€™) by the device and a feedback
is performed to match that target value. The fan speed value is computed
based on the parameters associated with the physical characteristics of the
system: a reference clock source frequency, a number of pulses per fan
revolution, etc.”…””}”(hjÞ  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´K>hh·h²hubhÌ)”}”(hŒDNote that the driver will update its values at most once per second.”h]”hŒDNote that the driver will update its values at most once per second.”…””}”(hjì  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hËh³hÊh´KJhh·h²hubeh}”(h]”Œkernel-driver-g762”ah ]”h"]”Œkernel driver g762”ah$]”h&]”uh1hµhhh²hh³hÊh´Kubeh}”(h]”h ]”h"]”h$]”h&]”Œsource”hÊuh1hŒcurrent_source”NŒcurrent_line”NŒsettings”Œdocutils.frontend”ŒValues”“”)”}”(hºNŒ	generator”NŒ	datestamp”NŒsource_link”NŒ
source_url”NŒtoc_backlinks”Œentry”Œfootnote_backlinks”KŒsectnum_xform”KŒstrip_comments”NŒstrip_elements_with_classes”NŒstrip_classes”NŒreport_level”KŒ
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