diff options
Diffstat (limited to 'Documentation/w1/slaves')
| -rw-r--r-- | Documentation/w1/slaves/index.rst | 16 | ||||
| -rw-r--r-- | Documentation/w1/slaves/w1_ds2406.rst (renamed from Documentation/w1/slaves/w1_ds2406) | 4 | ||||
| -rw-r--r-- | Documentation/w1/slaves/w1_ds2413.rst (renamed from Documentation/w1/slaves/w1_ds2413) | 9 | ||||
| -rw-r--r-- | Documentation/w1/slaves/w1_ds2423 | 47 | ||||
| -rw-r--r-- | Documentation/w1/slaves/w1_ds2423.rst | 54 | ||||
| -rw-r--r-- | Documentation/w1/slaves/w1_ds2438.rst (renamed from Documentation/w1/slaves/w1_ds2438) | 10 | ||||
| -rw-r--r-- | Documentation/w1/slaves/w1_ds28e04.rst (renamed from Documentation/w1/slaves/w1_ds28e04) | 5 | ||||
| -rw-r--r-- | Documentation/w1/slaves/w1_ds28e17.rst (renamed from Documentation/w1/slaves/w1_ds28e17) | 16 | ||||
| -rw-r--r-- | Documentation/w1/slaves/w1_therm.rst (renamed from Documentation/w1/slaves/w1_therm) | 11 |
9 files changed, 114 insertions, 58 deletions
diff --git a/Documentation/w1/slaves/index.rst b/Documentation/w1/slaves/index.rst new file mode 100644 index 000000000000..d0697b202f09 --- /dev/null +++ b/Documentation/w1/slaves/index.rst @@ -0,0 +1,16 @@ +. SPDX-License-Identifier: GPL-2.0 + +==================== +1-wire Slave Drivers +==================== + +.. toctree:: + :maxdepth: 1 + + w1_ds2406 + w1_ds2413 + w1_ds2423 + w1_ds2438 + w1_ds28e04 + w1_ds28e17 + w1_therm diff --git a/Documentation/w1/slaves/w1_ds2406 b/Documentation/w1/slaves/w1_ds2406.rst index 8137fe6f6c3d..d3e68266084f 100644 --- a/Documentation/w1/slaves/w1_ds2406 +++ b/Documentation/w1/slaves/w1_ds2406.rst @@ -1,7 +1,9 @@ +======================= w1_ds2406 kernel driver ======================= Supported chips: + * Maxim DS2406 (and other family 0x12) addressable switches Author: Scott Alfter <scott@alfter.us> @@ -9,7 +11,7 @@ Author: Scott Alfter <scott@alfter.us> Description ----------- -The w1_ds2406 driver allows connected devices to be switched on and off. +The w1_ds2406 driver allows connected devices to be switched on and off. These chips also provide 128 bytes of OTP EPROM, but reading/writing it is not supported. In TSOC-6 form, the DS2406 provides two switch outputs and can be provided with power on a dedicated input. In TO-92 form, it provides diff --git a/Documentation/w1/slaves/w1_ds2413 b/Documentation/w1/slaves/w1_ds2413.rst index 936263a8ccb4..c15bb5b919b7 100644 --- a/Documentation/w1/slaves/w1_ds2413 +++ b/Documentation/w1/slaves/w1_ds2413.rst @@ -1,11 +1,16 @@ +======================= Kernel driver w1_ds2413 ======================= Supported chips: + * Maxim DS2413 1-Wire Dual Channel Addressable Switch supported family codes: + + ================ ==== W1_FAMILY_DS2413 0x3A + ================ ==== Author: Mariusz Bialonczyk <manio@skyboo.net> @@ -20,11 +25,13 @@ Reading state The "state" file provides one-byte value which is in the same format as for the chip PIO_ACCESS_READ command (refer the datasheet for details): +======== ============================================================= Bit 0: PIOA Pin State Bit 1: PIOA Output Latch State Bit 2: PIOB Pin State Bit 3: PIOB Output Latch State Bit 4-7: Complement of Bit 3 to Bit 0 (verified by the kernel module) +======== ============================================================= This file is readonly. @@ -34,9 +41,11 @@ You can set the PIO pins using the "output" file. It is writable, you can write one-byte value to this sysfs file. Similarly the byte format is the same as for the PIO_ACCESS_WRITE command: +======== ====================================== Bit 0: PIOA Bit 1: PIOB Bit 2-7: No matter (driver will set it to "1"s) +======== ====================================== The chip has some kind of basic protection against transmission errors. diff --git a/Documentation/w1/slaves/w1_ds2423 b/Documentation/w1/slaves/w1_ds2423 deleted file mode 100644 index 3f98b505a0ee..000000000000 --- a/Documentation/w1/slaves/w1_ds2423 +++ /dev/null @@ -1,47 +0,0 @@ -Kernel driver w1_ds2423 -======================= - -Supported chips: - * Maxim DS2423 based counter devices. - -supported family codes: - W1_THERM_DS2423 0x1D - -Author: Mika Laitio <lamikr@pilppa.org> - -Description ------------ - -Support is provided through the sysfs w1_slave file. Each opening and -read sequence of w1_slave file initiates the read of counters and ram -available in DS2423 pages 12 - 15. - -Result of each page is provided as an ASCII output where each counter -value and associated ram buffer is outpputed to own line. - -Each lines will contain the values of 42 bytes read from the counter and -memory page along the crc=YES or NO for indicating whether the read operation -was successful and CRC matched. -If the operation was successful, there is also in the end of each line -a counter value expressed as an integer after c= - -Meaning of 42 bytes represented is following: - - 1 byte from ram page - - 4 bytes for the counter value - - 4 zero bytes - - 2 bytes for crc16 which was calculated from the data read since the previous crc bytes - - 31 remaining bytes from the ram page - - crc=YES/NO indicating whether read was ok and crc matched - - c=<int> current counter value - -example from the successful read: -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 -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 -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 -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 - -example from the read with crc errors: -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 -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 -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 -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 diff --git a/Documentation/w1/slaves/w1_ds2423.rst b/Documentation/w1/slaves/w1_ds2423.rst new file mode 100644 index 000000000000..755d659ad997 --- /dev/null +++ b/Documentation/w1/slaves/w1_ds2423.rst @@ -0,0 +1,54 @@ +Kernel driver w1_ds2423 +======================= + +Supported chips: + + * Maxim DS2423 based counter devices. + +supported family codes: + + =============== ==== + W1_THERM_DS2423 0x1D + =============== ==== + +Author: Mika Laitio <lamikr@pilppa.org> + +Description +----------- + +Support is provided through the sysfs w1_slave file. Each opening and +read sequence of w1_slave file initiates the read of counters and ram +available in DS2423 pages 12 - 15. + +Result of each page is provided as an ASCII output where each counter +value and associated ram buffer is outpputed to own line. + +Each lines will contain the values of 42 bytes read from the counter and +memory page along the crc=YES or NO for indicating whether the read operation +was successful and CRC matched. +If the operation was successful, there is also in the end of each line +a counter value expressed as an integer after c= + +Meaning of 42 bytes represented is following: + + - 1 byte from ram page + - 4 bytes for the counter value + - 4 zero bytes + - 2 bytes for crc16 which was calculated from the data read since the previous crc bytes + - 31 remaining bytes from the ram page + - crc=YES/NO indicating whether read was ok and crc matched + - c=<int> current counter value + +example from the successful read:: + + 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 + 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 + 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 + 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 + +example from the read with crc errors:: + + 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 + 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 + 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 + 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 diff --git a/Documentation/w1/slaves/w1_ds2438 b/Documentation/w1/slaves/w1_ds2438.rst index e64f65a09387..a29309a3f8e5 100644 --- a/Documentation/w1/slaves/w1_ds2438 +++ b/Documentation/w1/slaves/w1_ds2438.rst @@ -2,10 +2,13 @@ Kernel driver w1_ds2438 ======================= Supported chips: + * Maxim DS2438 Smart Battery Monitor supported family codes: + ================ ==== W1_FAMILY_DS2438 0x26 + ================ ==== Author: Mariusz Bialonczyk <manio@skyboo.net> @@ -56,8 +59,11 @@ Opening and reading this file initiates the CONVERT_V (voltage conversion) command of the chip. Depending on a sysfs filename a different input for the A/D will be selected: -vad: general purpose A/D input (VAD) -vdd: battery input (VDD) + +vad: + general purpose A/D input (VAD) +vdd: + battery input (VDD) After the voltage conversion the value is returned as decimal ASCII. Note: To get a volts the value has to be divided by 100. diff --git a/Documentation/w1/slaves/w1_ds28e04 b/Documentation/w1/slaves/w1_ds28e04.rst index 7819b65cfa48..b12b118890d3 100644 --- a/Documentation/w1/slaves/w1_ds28e04 +++ b/Documentation/w1/slaves/w1_ds28e04.rst @@ -1,11 +1,16 @@ +======================== Kernel driver w1_ds28e04 ======================== Supported chips: + * Maxim DS28E04-100 4096-Bit Addressable 1-Wire EEPROM with PIO supported family codes: + + ================= ==== W1_FAMILY_DS28E04 0x1C + ================= ==== Author: Markus Franke, <franke.m@sebakmt.com> <franm@hrz.tu-chemnitz.de> diff --git a/Documentation/w1/slaves/w1_ds28e17 b/Documentation/w1/slaves/w1_ds28e17.rst index 7fcfad5b4a37..e2d9f96d8f2c 100644 --- a/Documentation/w1/slaves/w1_ds28e17 +++ b/Documentation/w1/slaves/w1_ds28e17.rst @@ -1,11 +1,16 @@ +======================== Kernel driver w1_ds28e17 ======================== Supported chips: + * Maxim DS28E17 1-Wire-to-I2C Master Bridge supported family codes: + + ================= ==== W1_FAMILY_DS28E17 0x19 + ================= ==== Author: Jan Kandziora <jjj@gmx.de> @@ -20,11 +25,11 @@ a DS28E17 can be accessed by the kernel or userspace tools as if they were connected to a "native" I2C bus master. -An udev rule like the following -------------------------------------------------------------------------------- -SUBSYSTEM=="i2c-dev", KERNEL=="i2c-[0-9]*", ATTRS{name}=="w1-19-*", \ - SYMLINK+="i2c-$attr{name}" -------------------------------------------------------------------------------- +An udev rule like the following:: + + SUBSYSTEM=="i2c-dev", KERNEL=="i2c-[0-9]*", ATTRS{name}=="w1-19-*", \ + SYMLINK+="i2c-$attr{name}" + may be used to create stable /dev/i2c- entries based on the unique id of the DS28E17 chip. @@ -65,4 +70,3 @@ structure is created. See https://github.com/ianka/w1_ds28e17 for even more information. - diff --git a/Documentation/w1/slaves/w1_therm b/Documentation/w1/slaves/w1_therm.rst index d1f93af36f38..90531c340a07 100644 --- a/Documentation/w1/slaves/w1_therm +++ b/Documentation/w1/slaves/w1_therm.rst @@ -1,7 +1,9 @@ +====================== Kernel driver w1_therm -==================== +====================== Supported chips: + * Maxim ds18*20 based temperature sensors. * Maxim ds1825 based temperature sensors. @@ -13,12 +15,16 @@ Description w1_therm provides basic temperature conversion for ds18*20 devices, and the ds28ea00 device. -supported family codes: + +Supported family codes: + +==================== ==== W1_THERM_DS18S20 0x10 W1_THERM_DS1822 0x22 W1_THERM_DS18B20 0x28 W1_THERM_DS1825 0x3B W1_THERM_DS28EA00 0x42 +==================== ==== Support is provided through the sysfs w1_slave file. Each open and read sequence will initiate a temperature conversion then provide two @@ -51,6 +57,7 @@ If so, it will activate the master's strong pullup. In case the detection of parasite devices using this command fails (seems to be the case with some DS18S20) the strong pullup can be force-enabled. + If the strong pullup is enabled, the master's strong pullup will be driven when the conversion is taking place, provided the master driver does support the strong pullup (or it falls back to a pullup |