diff options
Diffstat (limited to 'Documentation/w1')
| -rw-r--r-- | Documentation/w1/slaves/w1_ds28e04 | 36 | ||||
| -rw-r--r-- | Documentation/w1/slaves/w1_therm | 2 |
2 files changed, 38 insertions, 0 deletions
diff --git a/Documentation/w1/slaves/w1_ds28e04 b/Documentation/w1/slaves/w1_ds28e04 new file mode 100644 index 00000000000..85bc9a7e02f --- /dev/null +++ b/Documentation/w1/slaves/w1_ds28e04 @@ -0,0 +1,36 @@ +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> + +Description +----------- + +Support is provided through the sysfs files "eeprom" and "pio". CRC checking +during memory accesses can optionally be enabled/disabled via the device +attribute "crccheck". The strong pull-up can optionally be enabled/disabled +via the module parameter "w1_strong_pullup". + +Memory Access + + A read operation on the "eeprom" file reads the given amount of bytes + from the EEPROM of the DS28E04. + + A write operation on the "eeprom" file writes the given byte sequence + to the EEPROM of the DS28E04. If CRC checking mode is enabled only + fully alligned blocks of 32 bytes with valid CRC16 values (in bytes 30 + and 31) are allowed to be written. + +PIO Access + + The 2 PIOs of the DS28E04-100 are accessible via the "pio" sysfs file. + + The current status of the PIO's is returned as an 8 bit value. Bit 0/1 + represent the state of PIO_0/PIO_1. Bits 2..7 do not care. The PIO's are + driven low-active, i.e. the driver delivers/expects low-active values. diff --git a/Documentation/w1/slaves/w1_therm b/Documentation/w1/slaves/w1_therm index 0403aaaba87..874a8ca93fe 100644 --- a/Documentation/w1/slaves/w1_therm +++ b/Documentation/w1/slaves/w1_therm @@ -3,6 +3,7 @@ Kernel driver w1_therm Supported chips: * Maxim ds18*20 based temperature sensors. + * Maxim ds1825 based temperature sensors. Author: Evgeniy Polyakov <johnpol@2ka.mipt.ru> @@ -15,6 +16,7 @@ supported family codes: W1_THERM_DS18S20 0x10 W1_THERM_DS1822 0x22 W1_THERM_DS18B20 0x28 +W1_THERM_DS1825 0x3B Support is provided through the sysfs w1_slave file. Each open and read sequence will initiate a temperature conversion then provide two |