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https://github.com/AetherDroid/android_kernel_samsung_on5xelte.git
synced 2025-09-06 08:18:05 -04:00
Fixed MTP to work with TWRP
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f6dfaef42e
50820 changed files with 20846062 additions and 0 deletions
8
Documentation/w1/slaves/00-INDEX
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8
Documentation/w1/slaves/00-INDEX
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00-INDEX
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- This file
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w1_therm
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- The Maxim/Dallas Semiconductor ds18*20 temperature sensor.
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w1_ds2423
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- The Maxim/Dallas Semiconductor ds2423 counter device.
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w1_ds28e04
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- The Maxim/Dallas Semiconductor ds28e04 eeprom.
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25
Documentation/w1/slaves/w1_ds2406
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Documentation/w1/slaves/w1_ds2406
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w1_ds2406 kernel driver
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=======================
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Supported chips:
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* Maxim DS2406 (and other family 0x12) addressable switches
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Author: Scott Alfter <scott@alfter.us>
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Description
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-----------
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The w1_ds2406 driver allows connected devices to be switched on and off.
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These chips also provide 128 bytes of OTP EPROM, but reading/writing it is
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not supported. In TSOC-6 form, the DS2406 provides two switch outputs and
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can be provided with power on a dedicated input. In TO-92 form, it provides
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one output and uses parasitic power only.
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The driver provides two sysfs files. state is readable; it gives the
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current state of each switch, with PIO A in bit 0 and PIO B in bit 1. The
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driver ORs this state with 0x30, so shell scripts get an ASCII 0/1/2/3 to
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work with. output is writable; bits 0 and 1 control PIO A and B,
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respectively. Bits 2-7 are ignored, so it's safe to write ASCII data.
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CRCs are checked on read and write. Failed checks cause an I/O error to be
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returned. On a failed write, the switch status is not changed.
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47
Documentation/w1/slaves/w1_ds2423
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Documentation/w1/slaves/w1_ds2423
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Kernel driver w1_ds2423
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=======================
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Supported chips:
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* Maxim DS2423 based counter devices.
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supported family codes:
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W1_THERM_DS2423 0x1D
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Author: Mika Laitio <lamikr@pilppa.org>
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Description
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-----------
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Support is provided through the sysfs w1_slave file. Each opening and
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read sequence of w1_slave file initiates the read of counters and ram
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available in DS2423 pages 12 - 15.
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Result of each page is provided as an ASCII output where each counter
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value and associated ram buffer is outpputed to own line.
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Each lines will contain the values of 42 bytes read from the counter and
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memory page along the crc=YES or NO for indicating whether the read operation
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was successful and CRC matched.
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If the operation was successful, there is also in the end of each line
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a counter value expressed as an integer after c=
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Meaning of 42 bytes represented is following:
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- 1 byte from ram page
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- 4 bytes for the counter value
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- 4 zero bytes
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- 2 bytes for crc16 which was calculated from the data read since the previous crc bytes
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- 31 remaining bytes from the ram page
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- crc=YES/NO indicating whether read was ok and crc matched
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- c=<int> current counter value
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example from the successful read:
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00 02 00 00 00 00 00 00 00 6d 38 00 ff ff 00 00 fe ff 00 00 ff ff 00 00 ff ff 00 00 ff ff 00 00 ff ff 00 00 ff ff 00 00 ff ff crc=YES c=2
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00 02 00 00 00 00 00 00 00 e0 1f 00 ff ff 00 00 ff ff 00 00 ff ff 00 00 ff ff 00 00 ff ff 00 00 ff ff 00 00 ff ff 00 00 ff ff crc=YES c=2
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00 29 c6 5d 18 00 00 00 00 04 37 00 ff ff 00 00 ff ff 00 00 ff ff 00 00 ff ff 00 00 ff ff 00 00 ff ff 00 00 ff ff 00 00 ff ff crc=YES c=408798761
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00 05 00 00 00 00 00 00 00 8d 39 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff crc=YES c=5
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example from the read with crc errors:
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00 02 00 00 00 00 00 00 00 6d 38 00 ff ff 00 00 fe ff 00 00 ff ff 00 00 ff ff 00 00 ff ff 00 00 ff ff 00 00 ff ff 00 00 ff ff crc=YES c=2
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00 02 00 00 22 00 00 00 00 e0 1f 00 ff ff 00 00 ff ff 00 00 ff ff 00 00 ff ff 00 00 ff ff 00 00 ff ff 00 00 ff ff 00 00 ff ff crc=NO
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00 e1 61 5d 19 00 00 00 00 df 0b 00 ff ff 00 00 ff ff 00 00 ff ff 00 00 ff ff 00 00 ff ff 00 00 ff ff 00 00 ff ff 00 00 ff ff crc=NO
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00 05 00 00 20 00 00 00 00 8d 39 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff crc=NO
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36
Documentation/w1/slaves/w1_ds28e04
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Documentation/w1/slaves/w1_ds28e04
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Kernel driver w1_ds28e04
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========================
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Supported chips:
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* Maxim DS28E04-100 4096-Bit Addressable 1-Wire EEPROM with PIO
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supported family codes:
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W1_FAMILY_DS28E04 0x1C
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Author: Markus Franke, <franke.m@sebakmt.com> <franm@hrz.tu-chemnitz.de>
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Description
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-----------
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Support is provided through the sysfs files "eeprom" and "pio". CRC checking
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during memory accesses can optionally be enabled/disabled via the device
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attribute "crccheck". The strong pull-up can optionally be enabled/disabled
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via the module parameter "w1_strong_pullup".
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Memory Access
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A read operation on the "eeprom" file reads the given amount of bytes
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from the EEPROM of the DS28E04.
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A write operation on the "eeprom" file writes the given byte sequence
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to the EEPROM of the DS28E04. If CRC checking mode is enabled only
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fully aligned blocks of 32 bytes with valid CRC16 values (in bytes 30
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and 31) are allowed to be written.
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PIO Access
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The 2 PIOs of the DS28E04-100 are accessible via the "pio" sysfs file.
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The current status of the PIO's is returned as an 8 bit value. Bit 0/1
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represent the state of PIO_0/PIO_1. Bits 2..7 do not care. The PIO's are
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driven low-active, i.e. the driver delivers/expects low-active values.
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50
Documentation/w1/slaves/w1_therm
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50
Documentation/w1/slaves/w1_therm
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Kernel driver w1_therm
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====================
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Supported chips:
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* Maxim ds18*20 based temperature sensors.
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* Maxim ds1825 based temperature sensors.
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Author: Evgeniy Polyakov <johnpol@2ka.mipt.ru>
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Description
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-----------
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w1_therm provides basic temperature conversion for ds18*20 devices.
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supported family codes:
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W1_THERM_DS18S20 0x10
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W1_THERM_DS1822 0x22
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W1_THERM_DS18B20 0x28
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W1_THERM_DS1825 0x3B
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Support is provided through the sysfs w1_slave file. Each open and
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read sequence will initiate a temperature conversion then provide two
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lines of ASCII output. The first line contains the nine hex bytes
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read along with a calculated crc value and YES or NO if it matched.
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If the crc matched the returned values are retained. The second line
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displays the retained values along with a temperature in millidegrees
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Centigrade after t=.
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Parasite powered devices are limited to one slave performing a
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temperature conversion at a time. If none of the devices are parasite
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powered it would be possible to convert all the devices at the same
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time and then go back to read individual sensors. That isn't
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currently supported. The driver also doesn't support reduced
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precision (which would also reduce the conversion time).
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The module parameter strong_pullup can be set to 0 to disable the
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strong pullup, 1 to enable autodetection or 2 to force strong pullup.
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In case of autodetection, the driver will use the "READ POWER SUPPLY"
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command to check if there are pariste powered devices on the bus.
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If so, it will activate the master's strong pullup.
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In case the detection of parasite devices using this command fails
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(seems to be the case with some DS18S20) the strong pullup can
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be force-enabled.
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If the strong pullup is enabled, the master's strong pullup will be
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driven when the conversion is taking place, provided the master driver
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does support the strong pullup (or it falls back to a pullup
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resistor). The DS18b20 temperature sensor specification lists a
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maximum current draw of 1.5mA and that a 5k pullup resistor is not
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sufficient. The strong pullup is designed to provide the additional
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current required.
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