diff options
| author | Henrique de Moraes Holschuh <hmh@hmh.eng.br> | 2007-04-24 11:48:13 -0300 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2007-04-25 02:00:27 -0400 |
| commit | 176750d68801bfa4a88d1cf54174aa0347d7e5d8 (patch) | |
| tree | cb8cb70fcce9e6d7f2d9365635b2ec2856336ad2 /Documentation/thinkpad-acpi.txt | |
| parent | 54ae15014c306b3d7ad32c996fea9a5ac8560b60 (diff) | |
ACPI: thinkpad-acpi: driver sysfs conversion
Add the sysfs attributes for the platform driver.
Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'Documentation/thinkpad-acpi.txt')
| -rw-r--r-- | Documentation/thinkpad-acpi.txt | 42 |
1 files changed, 40 insertions, 2 deletions
diff --git a/Documentation/thinkpad-acpi.txt b/Documentation/thinkpad-acpi.txt index 0e4e053cfac..cc079afaf66 100644 --- a/Documentation/thinkpad-acpi.txt +++ b/Documentation/thinkpad-acpi.txt @@ -101,11 +101,39 @@ follow all sysfs guidelines and correctly process all errors (the sysfs interface makes extensive use of errors). File descriptors and open / close operations to the sysfs inodes must also be properly implemented. -Driver version -- /proc/acpi/ibm/driver ---------------------------------------- +The version of thinkpad-acpi's sysfs interface is exported by the driver +as a driver attribute (see below). + +Sysfs driver attributes are on the driver's sysfs attribute space, +for 2.6.20 this is /sys/bus/platform/drivers/thinkpad-acpi/. + +Sysfs device attributes are on the driver's sysfs attribute space, +for 2.6.20 this is /sys/devices/platform/thinkpad-acpi/. + +Driver version +-------------- + +procfs: /proc/acpi/ibm/driver +sysfs driver attribute: version The driver name and version. No commands can be written to this file. +Sysfs interface version +----------------------- + +sysfs driver attribute: interface_version + +Version of the thinkpad-acpi sysfs interface, as an unsigned long +(output in hex format: 0xAAAABBCC), where: + AAAA - major revision + BB - minor revision + CC - bugfix revision + +The sysfs interface version changelog for the driver can be found at the +end of this document. Changes to the sysfs interface done by the kernel +subsystems are not documented here, nor are they tracked by this +attribute. + Hot keys -- /proc/acpi/ibm/hotkey --------------------------------- @@ -745,9 +773,19 @@ to enable more than one output class, just add their values. There is also a kernel build option to enable more debugging information, which may be necessary to debug driver problems. +The level of debugging information output by the driver can be changed +at runtime through sysfs, using the driver attribute debug_level. The +attribute takes the same bitmask as the debug module parameter above. + Force loading of module ----------------------- If thinkpad-acpi refuses to detect your ThinkPad, you can try to specify the module parameter force_load=1. Regardless of whether this works or not, please contact ibm-acpi-devel@lists.sourceforge.net with a report. + + +Sysfs interface changelog: + +0x000100: Initial sysfs support, as a single platform driver and + device. |