1. 22 Jun, 2006 2 commits
    • Evgeniy Polyakov's avatar
    • Evgeniy Polyakov's avatar
      [PATCH] w1: Added default generic read/write operations. · f522d239
      Evgeniy Polyakov authored
      
      
      Special file in each w1 slave device's directory called "rw" is created
      each time new slave and no appropriate w1 family is registered.
      "rw" file supports read and write operations, which allows to perform
      almost any kind of operations. Each logical operation is a transaction
      in nature, which can contain several (two or one) low-level operations.
      Let's see how one can read EEPROM context:
      1. one must write control buffer, i.e. buffer containing command byte
      and two byte address. At this step bus is reset and appropriate device
      is selected using either W1_SKIP_ROM or W1_MATCH_ROM command.
      Then provided control buffer is being written to the wire.
      2. reading. This will issue reading eeprom response.
      
      It is possible that between 1. and 2. w1 master thread will reset bus for
      searching and slave device will be even removed, but in this case 0xff will
      be read, since no device was selected.
      Signed-off-by: default avatarEvgeniy Polyakov <johnpol@2ka.mipt.ru>
      Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
      f522d239
  2. 21 Jun, 2006 38 commits