)]}'
{
  "commit": "d73772474f6ebbacbe820c31c0fa1cffa7160246",
  "tree": "7564212618d43910de01a818c0cdef5759ad12a9",
  "parents": [
    "d7880f10c5d42ba182a97c1fd41d41d0b8837097"
  ],
  "author": {
    "name": "Henrique de Moraes Holschuh",
    "email": "hmh@hmh.eng.br",
    "time": "Thu Jun 18 00:40:17 2009 -0300"
  },
  "committer": {
    "name": "Len Brown",
    "email": "len.brown@intel.com",
    "time": "Thu Jun 18 01:30:57 2009 -0400"
  },
  "message": "thinkpad-acpi: support the second fan on the X61\n\nSupport reading the tachometer of the auxiliary fan of a X60/X61.\n\nIt was found out by sheer luck, that bit 0 of EC register 0x31\n(formely HBRV) selects which fan is active for tachometer readings\nthrough EC 0x84/0x085: 0 for fan1, 1 for fan2.\n\nMany thanks to Christoph Kl??nter, to Whoopie, and to weasel, who\nhelped confirm that behaviour.\n\nFan control through EC HFSP applies to both fans equally, regardless\nof the state of bit 0 of EC 0x31.  That matches the way the DSDT uses\nHFSP.\n\nIn order to better support the secondary fan, export a second\ntachometer over hwmon, and add defensive measures to make sure we are\nreading the correct tachometer.\n\nSupport for the second fan is whitelist-based, as I have not found\nanything obvious to look for in the DSDT to detect the presence of\nthe second fan.\n\nSigned-off-by: Henrique de Moraes Holschuh \u003chmh@hmh.eng.br\u003e\nSigned-off-by: Len Brown \u003clen.brown@intel.com\u003e\n",
  "tree_diff": [
    {
      "type": "modify",
      "old_id": "f2ff638cce8d078c87180e68b6b5271e4aa16d89",
      "old_mode": 33188,
      "old_path": "Documentation/laptops/thinkpad-acpi.txt",
      "new_id": "0d5e91379ae8ce7882844555731a8d77e04eacd3",
      "new_mode": 33188,
      "new_path": "Documentation/laptops/thinkpad-acpi.txt"
    },
    {
      "type": "modify",
      "old_id": "c8d74dbacbbd4646989d1c3867ba801afbf9c329",
      "old_mode": 33188,
      "old_path": "drivers/platform/x86/thinkpad_acpi.c",
      "new_id": "27ca676a7092e1fe98288e8757489b95131e8951",
      "new_mode": 33188,
      "new_path": "drivers/platform/x86/thinkpad_acpi.c"
    }
  ]
}