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author | Jeff Garzik <jgarzik@pretzel.yyz.us> | 2005-06-22 21:50:57 -0400 |
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committer | Jeff Garzik <jgarzik@pobox.com> | 2005-06-22 21:50:57 -0400 |
commit | a5324343955997d1439f26518ddac567cd5d134b (patch) | |
tree | f43558389c41e3a0f076c4ee55d77c4aa1561779 /Documentation/i2c/chips/max6875 | |
parent | 8199d3a79c224bbe5943fa08684e1f93a17881b0 (diff) | |
parent | a4936044001694f033fe4ea94d6034d51a6b465c (diff) | |
download | op-kernel-dev-a5324343955997d1439f26518ddac567cd5d134b.zip op-kernel-dev-a5324343955997d1439f26518ddac567cd5d134b.tar.gz |
Merge /spare/repo/linux-2.6/
Diffstat (limited to 'Documentation/i2c/chips/max6875')
-rw-r--r-- | Documentation/i2c/chips/max6875 | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/Documentation/i2c/chips/max6875 b/Documentation/i2c/chips/max6875 new file mode 100644 index 0000000..b4fb49b --- /dev/null +++ b/Documentation/i2c/chips/max6875 @@ -0,0 +1,54 @@ +Kernel driver max6875 +===================== + +Supported chips: + * Maxim max6874, max6875 + Prefixes: 'max6875' + Addresses scanned: 0x50, 0x52 + Datasheets: + http://pdfserv.maxim-ic.com/en/ds/MAX6874-MAX6875.pdf + +Author: Ben Gardner <bgardner@wabtec.com> + + +Module Parameters +----------------- + +* allow_write int + Set to non-zero to enable write permission: + *0: Read only + 1: Read and write + + +Description +----------- + +The MAXIM max6875 is a EEPROM-programmable power-supply sequencer/supervisor. +It provides timed outputs that can be used as a watchdog, if properly wired. +It also provides 512 bytes of user EEPROM. + +At reset, the max6875 reads the configuration eeprom into its configuration +registers. The chip then begins to operate according to the values in the +registers. + +See the datasheet for details on how to program the EEPROM. + + +Sysfs entries +------------- + +eeprom_user - 512 bytes of user-defined EEPROM space. Only writable if + allow_write was set and register 0x43 is 0. + +eeprom_config - 70 bytes of config EEPROM. Note that changes will not get + loaded into register space until a power cycle or device reset. + +reg_config - 70 bytes of register space. Any changes take affect immediately. + + +General Remarks +--------------- + +A typical application will require that the EEPROMs be programmed once and +never altered afterwards. + |