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Steve Hardy - Vivien Didelot - Guillaume Roguez ”h]”(hŒterm”“”)”}”(hŒAuthors:”h]”hŒAuthors:”…””}”(hjhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1j›hŸh¶h Khj—ubhŒ definition”“”)”}”(hhh]”hÎ)”}”(hhh]”(hÓ)”}”(hŒSteve Hardy ”h]”h¸)”}”(hjµh]”(hŒ Steve Hardy <”…””}”(hj·hžhhŸNh Nubj )”}”(hŒshardy@redhat.com”h]”hŒshardy@redhat.com”…””}”(hj¾hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”Œrefuri”Œmailto:shardy@redhat.com”uh1j hj·ubhŒ>”…””}”(hj·hžhhŸNh Nubeh}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h Khj³ubah}”(h]”h ]”h"]”h$]”h&]”uh1hÒhj°ubhÓ)”}”(hŒ4Vivien Didelot ”h]”h¸)”}”(hjàh]”(hŒVivien Didelot <”…””}”(hjâhžhhŸNh Nubj )”}”(hŒ#vivien.didelot@savoirfairelinux.com”h]”hŒ#vivien.didelot@savoirfairelinux.com”…””}”(hjéhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”Œrefuri”Œ*mailto:vivien.didelot@savoirfairelinux.com”uh1j hjâubhŒ>”…””}”(hjâhžhhŸNh Nubeh}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h KhjÞubah}”(h]”h ]”h"]”h$]”h&]”uh1hÒhj°ubhÓ)”}”(hŒ9Guillaume Roguez ”h]”h¸)”}”(hŒ8Guillaume Roguez ”h]”(hŒGuillaume Roguez <”…””}”(hj hžhhŸNh Nubj )”}”(hŒ%guillaume.roguez@savoirfairelinux.com”h]”hŒ%guillaume.roguez@savoirfairelinux.com”…””}”(hjhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”Œrefuri”Œ,mailto:guillaume.roguez@savoirfairelinux.com”uh1j hj ubhŒ>”…””}”(hj hžhhŸNh Nubeh}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h Khj ubah}”(h]”h ]”h"]”h$]”h&]”uh1hÒhj°ubeh}”(h]”h ]”h"]”h$]”h&]”jˆŒ-”uh1hÍhŸh¶h Khj­ubah}”(h]”h ]”h"]”h$]”h&]”uh1j«hj—ubeh}”(h]”h ]”h"]”h$]”h&]”uh1j•hŸh¶h Khj’ubah}”(h]”h ]”h"]”h$]”h&]”uh1jhh£hžhhŸNh Nubh¢)”}”(hhh]”(h§)”}”(hŒ Platform data”h]”hŒ Platform data”…””}”(hjQhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h¦hjNhžhhŸh¶h Kubh¸)”}”(hŒ”The ads7828 driver accepts an optional ads7828_platform_data structure (defined in include/linux/platform_data/ads7828.h). The structure fields are:”h]”hŒ”The ads7828 driver accepts an optional ads7828_platform_data structure (defined in include/linux/platform_data/ads7828.h). The structure fields are:”…””}”(hj_hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h KhjNhžhubhÎ)”}”(hhh]”(hÓ)”}”(hŒtdiff_input: (bool) Differential operation set to true for differential mode, false for default single ended mode. ”h]”j‘)”}”(hhh]”j–)”}”(hŒrdiff_input: (bool) Differential operation set to true for differential mode, false for default single ended mode. ”h]”(jœ)”}”(hŒ)diff_input: (bool) Differential operation”h]”hŒ)diff_input: (bool) Differential operation”…””}”(hj{hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1j›hŸh¶h K"hjwubj¬)”}”(hhh]”h¸)”}”(hŒGset to true for differential mode, false for default single ended mode.”h]”hŒGset to true for differential mode, false for default single ended mode.”…””}”(hjŒhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h K"hj‰ubah}”(h]”h ]”h"]”h$]”h&]”uh1j«hjwubeh}”(h]”h ]”h"]”h$]”h&]”uh1j•hŸh¶h K"hjtubah}”(h]”h ]”h"]”h$]”h&]”uh1jhjpubah}”(h]”h ]”h"]”h$]”h&]”uh1hÒhjmhžhhŸNh NubhÓ)”}”(hŒ…ext_vref: (bool) External reference set to true if it operates with an external reference, false for default internal reference. ”h]”j‘)”}”(hhh]”j–)”}”(hŒext_vref: (bool) External reference set to true if it operates with an external reference, false for default internal reference. ”h]”(jœ)”}”(hŒ#ext_vref: (bool) External reference”h]”hŒ#ext_vref: (bool) External reference”…””}”(hj½hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1j›hŸh¶h K&hj¹ubj¬)”}”(hhh]”h¸)”}”(hŒ\set to true if it operates with an external reference, false for default internal reference.”h]”hŒ\set to true if it operates with an external reference, false for default internal reference.”…””}”(hjÎhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h K%hjËubah}”(h]”h ]”h"]”h$]”h&]”uh1j«hj¹ubeh}”(h]”h ]”h"]”h$]”h&]”uh1j•hŸh¶h K&hj¶ubah}”(h]”h ]”h"]”h$]”h&]”uh1jhj²ubah}”(h]”h ]”h"]”h$]”h&]”uh1hÒhjmhžhhŸNh NubhÓ)”}”(hX vref_mv: (unsigned int) Voltage reference if using an external reference, set this to the reference voltage in mV, otherwise it will default to the internal value (2500mV). This value will be bounded with limits accepted by the chip, described in the datasheet. ”h]”j‘)”}”(hhh]”j–)”}”(hXvref_mv: (unsigned int) Voltage reference if using an external reference, set this to the reference voltage in mV, otherwise it will default to the internal value (2500mV). This value will be bounded with limits accepted by the chip, described in the datasheet. ”h]”(jœ)”}”(hŒ)vref_mv: (unsigned int) Voltage reference”h]”hŒ)vref_mv: (unsigned int) Voltage reference”…””}”(hjÿhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1j›hŸh¶h K+hjûubj¬)”}”(hhh]”h¸)”}”(hŒÛif using an external reference, set this to the reference voltage in mV, otherwise it will default to the internal value (2500mV). This value will be bounded with limits accepted by the chip, described in the datasheet.”h]”hŒÛif using an external reference, set this to the reference voltage in mV, otherwise it will default to the internal value (2500mV). This value will be bounded with limits accepted by the chip, described in the datasheet.”…””}”(hjhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h K)hj ubah}”(h]”h ]”h"]”h$]”h&]”uh1j«hjûubeh}”(h]”h ]”h"]”h$]”h&]”uh1j•hŸh¶h K+hjøubah}”(h]”h ]”h"]”h$]”h&]”uh1jhjôubah}”(h]”h ]”h"]”h$]”h&]”uh1hÒhjmhžhhŸNh Nubeh}”(h]”h ]”h"]”h$]”h&]”jˆj‰uh1hÍhŸh¶h K!hjNhžhubhÈ)”}”(hŒyIf no structure is provided, the configuration defaults to single ended operation and internal voltage reference (2.5V). ”h]”h¸)”}”(hŒxIf no structure is provided, the configuration defaults to single ended operation and internal voltage reference (2.5V).”h]”hŒxIf no structure is provided, the configuration defaults to single ended operation and internal voltage reference (2.5V).”…””}”(hj@hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h K-hj<ubah}”(h]”h ]”h"]”h$]”h&]”uh1hÇhŸh¶h K-hjNhžhubeh}”(h]”Œ platform-data”ah ]”h"]”Œ platform data”ah$]”h&]”uh1h¡hh£hžhhŸh¶h Kubh¢)”}”(hhh]”(h§)”}”(hŒ Description”h]”hŒ Description”…””}”(hj_hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h¦hj\hžhhŸh¶h K1ubh¸)”}”(hŒMThis driver implements support for the Texas Instruments ADS7828 and ADS7830.”h]”hŒMThis driver implements support for the Texas Instruments ADS7828 and ADS7830.”…””}”(hjmhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h K3hj\hžhubh¸)”}”(hŒ^The ADS7828 device is a 12-bit 8-channel A/D converter, while the ADS7830 does 8-bit sampling.”h]”hŒ^The ADS7828 device is a 12-bit 8-channel A/D converter, while the ADS7830 does 8-bit sampling.”…””}”(hj{hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h K5hj\hžhubh¸)”}”(hŒwIt can operate in single ended mode (8 +ve inputs) or in differential mode, where 4 differential pairs can be measured.”h]”hŒwIt can operate in single ended mode (8 +ve inputs) or in differential mode, where 4 differential pairs can be measured.”…””}”(hj‰hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h K8hj\hžhubh¸)”}”(hŒ¶The chip also has the facility to use an external voltage reference. This may be required if your hardware supplies the ADS7828 from a 5V supply, see the datasheet for more details.”h]”hŒ¶The chip also has the facility to use an external voltage reference. This may be required if your hardware supplies the ADS7828 from a 5V supply, see the datasheet for more details.”…””}”(hj—hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h·hŸh¶h K;hj\hžhubh¸)”}”(hŒÑThere is no reliable way to identify this chip, so the driver will not scan some addresses to try to auto-detect it. That means that you will have to statically declare the device in the platform support code.”h]”hŒÑThere is no reliable way to identify this chip, so the driver will not scan some addresses to try to auto-detect it. 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