€•¥!      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/misc-devices/ad525x_dpot”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$]”h&]”Œ	refdomain”h)Œreftype”h+Œ	reftarget”Œ,/translations/zh_TW/misc-devices/ad525x_dpot”Œmodname”NŒ	classname”NŒrefexplicit”ˆuh1hhhubh)”}”(hhh]”hŒItalian”…””}”hhFsbah}”(h]”h ]”h"]”h$]”h&]”Œ	refdomain”h)Œreftype”h+Œ	reftarget”Œ,/translations/it_IT/misc-devices/ad525x_dpot”Œmodname”NŒ	classname”NŒrefexplicit”ˆuh1hhhubh)”}”(hhh]”hŒJapanese”…””}”hhZsbah}”(h]”h ]”h"]”h$]”h&]”Œ	refdomain”h)Œreftype”h+Œ	reftarget”Œ,/translations/ja_JP/misc-devices/ad525x_dpot”Œmodname”NŒ	classname”NŒrefexplicit”ˆuh1hhhubh)”}”(hhh]”hŒKorean”…””}”hhnsbah}”(h]”h ]”h"]”h$]”h&]”Œ	refdomain”h)Œreftype”h+Œ	reftarget”Œ,/translations/ko_KR/misc-devices/ad525x_dpot”Œmodname”NŒ	classname”NŒrefexplicit”ˆuh1hhhubh)”}”(hhh]”hŒSpanish”…””}”hh‚sbah}”(h]”h ]”h"]”h$]”h&]”Œ	refdomain”h)Œreftype”h+Œ	reftarget”Œ,/translations/sp_SP/misc-devices/ad525x_dpot”Œmodname”NŒ	classname”NŒrefexplicit”ˆuh1hhhubeh}”(h]”h ]”h"]”h$]”h&]”Œcurrent_language”ŒEnglish”uh1h
hhŒ	_document”hŒsource”NŒline”NubhŒcomment”“”)”}”(hŒ SPDX-License-Identifier: GPL-2.0”h]”hŒ SPDX-License-Identifier: GPL-2.0”…””}”hh£sbah}”(h]”h ]”h"]”h$]”h&]”Œ	xml:space”Œpreserve”uh1h¡hhhžhhŸŒF/var/lib/git/docbuild/linux/Documentation/misc-devices/ad525x_dpot.rst”h KubhŒsection”“”)”}”(hhh]”(hŒtitle”“”)”}”(hŒAD525x Digital Potentiometers”h]”hŒAD525x Digital Potentiometers”…””}”(hh»hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h¹hh¶hžhhŸh³h KubhŒ	paragraph”“”)”}”(hXR  The ad525x_dpot driver exports a simple sysfs interface.  This allows you to
work with the immediate resistance settings as well as update the saved startup
settings.  Access to the factory programmed tolerance is also provided, but
interpretation of this settings is required by the end application according to
the specific part in use.”h]”hXR  The ad525x_dpot driver exports a simple sysfs interface.  This allows you to
work with the immediate resistance settings as well as update the saved startup
settings.  Access to the factory programmed tolerance is also provided, but
interpretation of this settings is required by the end application according to
the specific part in use.”…””}”(hhËhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hÉhŸh³h Khh¶hžhubhµ)”}”(hhh]”(hº)”}”(hŒFiles”h]”hŒFiles”…””}”(hhÜhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h¹hhÙhžhhŸh³h KubhÊ)”}”(hŒšEach dpot device will have a set of eeprom, rdac, and tolerance files.  How
many depends on the actual part you have, as will the range of allowed values.”h]”hŒšEach dpot device will have a set of eeprom, rdac, and tolerance files.  How
many depends on the actual part you have, as will the range of allowed values.”…””}”(hhêhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hÉhŸh³h KhhÙhžhubhÊ)”}”(hŒEThe eeprom files are used to program the startup value of the device.”h]”hŒEThe eeprom files are used to program the startup value of the device.”…””}”(hhøhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hÉhŸh³h KhhÙhžhubhÊ)”}”(hŒEThe rdac files are used to program the immediate value of the device.”h]”hŒEThe rdac files are used to program the immediate value of the device.”…””}”(hj  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hÉhŸh³h KhhÙhžhubhÊ)”}”(hX  The tolerance files are the read-only factory programmed tolerance settings
and may vary greatly on a part-by-part basis.  For exact interpretation of
this field, please consult the datasheet for your part.  This is presented
as a hex file for easier parsing.”h]”hX  The tolerance files are the read-only factory programmed tolerance settings
and may vary greatly on a part-by-part basis.  For exact interpretation of
this field, please consult the datasheet for your part.  This is presented
as a hex file for easier parsing.”…””}”(hj  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hÉhŸh³h KhhÙhžhubeh}”(h]”Œfiles”ah ]”h"]”Œfiles”ah$]”h&]”uh1h´hh¶hžhhŸh³h Kubhµ)”}”(hhh]”(hº)”}”(hŒExample”h]”hŒExample”…””}”(hj-  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h¹hj*  hžhhŸh³h KubhÊ)”}”(hŒ™Locate the device in your sysfs tree.  This is probably easiest by going into
the common i2c directory and locating the device by the i2c slave address::”h]”hŒ˜Locate the device in your sysfs tree.  This is probably easiest by going into
the common i2c directory and locating the device by the i2c slave address:”…””}”(hj;  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hÉhŸh³h Khj*  hžhubhŒliteral_block”“”)”}”(hŒ1# ls /sys/bus/i2c/devices/
0-0022  0-0027  0-002f”h]”hŒ1# ls /sys/bus/i2c/devices/
0-0022  0-0027  0-002f”…””}”hjK  sbah}”(h]”h ]”h"]”h$]”h&]”h±h²uh1jI  hŸh³h K"hj*  hžhubhÊ)”}”(hŒ–So assuming the device in question is on the first i2c bus and has the slave
address of 0x2f, we descend (unrelated sysfs entries have been trimmed)::”h]”hŒ•So assuming the device in question is on the first i2c bus and has the slave
address of 0x2f, we descend (unrelated sysfs entries have been trimmed):”…””}”(hjY  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hÉhŸh³h K%hj*  hžhubjJ  )”}”(hŒ:# ls /sys/bus/i2c/devices/0-002f/
eeprom0 rdac0 tolerance0”h]”hŒ:# ls /sys/bus/i2c/devices/0-002f/
eeprom0 rdac0 tolerance0”…””}”hjg  sbah}”(h]”h ]”h"]”h$]”h&]”h±h²uh1jI  hŸh³h K(hj*  hžhubhÊ)”}”(hŒ7You can use simple reads/writes to access these files::”h]”hŒ6You can use simple reads/writes to access these files:”…””}”(hju  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hÉhŸh³h K+hj*  hžhubjJ  )”}”(hŒ…# cd /sys/bus/i2c/devices/0-002f/

# cat eeprom0
0
# echo 10 > eeprom0
# cat eeprom0
10

# cat rdac0
5
# echo 3 > rdac0
# cat rdac0
3”h]”hŒ…# cd /sys/bus/i2c/devices/0-002f/

# cat eeprom0
0
# echo 10 > eeprom0
# cat eeprom0
10

# cat rdac0
5
# echo 3 > rdac0
# cat rdac0
3”…””}”hjƒ  sbah}”(h]”h ]”h"]”h$]”h&]”h±h²uh1jI  hŸh³h K-hj*  hžhubeh}”(h]”Œexample”ah ]”h"]”Œexample”ah$]”h&]”uh1h´hh¶hžhhŸh³h Kubeh}”(h]”Œad525x-digital-potentiometers”ah ]”h"]”Œad525x digital potentiometers”ah$]”h&]”uh1h´hhhžhhŸh³h Kubeh}”(h]”h ]”h"]”h$]”h&]”Œsource”h³uh1hŒcurrent_source”NŒcurrent_line”NŒsettings”Œdocutils.frontend”ŒValues”“”)”}”(h¹NŒ	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
halt_level”KŒexit_status_level”KŒdebug”NŒwarning_stream”NŒ	traceback”ˆŒinput_encoding”Œ	utf-8-sig”Œinput_encoding_error_handler”Œstrict”Œoutput_encoding”Œutf-8”Œoutput_encoding_error_handler”jÄ  Œerror_encoding”Œutf-8”Œerror_encoding_error_handler”Œbackslashreplace”Œlanguage_code”Œen”Œrecord_dependencies”NŒconfig”NŒ	id_prefix”hŒauto_id_prefix”Œid”Œdump_settings”NŒdump_internals”NŒdump_transforms”NŒdump_pseudo_xml”NŒexpose_internals”NŒstrict_visitor”NŒ_disable_config”NŒ_source”h³Œ_destination”NŒ_config_files”]”Œ7/var/lib/git/docbuild/linux/Documentation/docutils.conf”aŒfile_insertion_enabled”ˆŒraw_enabled”KŒline_length_limit”M'Œpep_references”NŒpep_base_url”Œhttps://peps.python.org/”Œpep_file_url_template”Œpep-%04d”Œrfc_references”NŒrfc_base_url”Œ&https://datatracker.ietf.org/doc/html/”Œ	tab_width”KŒtrim_footnote_reference_space”‰Œsyntax_highlight”Œlong”Œsmart_quotes”ˆŒsmartquotes_locales”]”Œcharacter_level_inline_markup”‰Œdoctitle_xform”‰Œdocinfo_xform”KŒsectsubtitle_xform”‰Œimage_loading”Œlink”Œembed_stylesheet”‰Œcloak_email_addresses”ˆŒsection_self_link”‰Œenv”NubŒreporter”NŒindirect_targets”]”Œsubstitution_defs”}”Œsubstitution_names”}”Œrefnames”}”Œrefids”}”Œnameids”}”(jž  j›  j'  j$  j–  j“  uŒ	nametypes”}”(jž  ‰j'  ‰j–  ‰uh}”(j›  h¶j$  hÙj“  j*  uŒfootnote_refs”}”Œcitation_refs”}”Œautofootnotes”]”Œautofootnote_refs”]”Œsymbol_footnotes”]”Œsymbol_footnote_refs”]”Œ	footnotes”]”Œ	citations”]”Œautofootnote_start”KŒsymbol_footnote_start”K Œ
id_counter”Œcollections”ŒCounter”“”}”…”R”Œparse_messages”]”Œtransform_messages”]”Œtransformer”NŒinclude_log”]”Œ
decoration”Nhžhub.