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| author | Alan Stern <stern@rowland.harvard.edu> | 2007-03-13 21:39:15 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2007-04-27 22:28:35 +0200 |
| commit | eaafbc3a8adab16babe2c20e54ad3ba40d1fbbc9 (patch) | |
| tree | fea84341faf742efe8beeaff03ec94b687b7b26f /Documentation/ABI | |
| parent | USB: separate autosuspend from external suspend (diff) | |
| download | linux-eaafbc3a8adab16babe2c20e54ad3ba40d1fbbc9.tar.xz linux-eaafbc3a8adab16babe2c20e54ad3ba40d1fbbc9.zip | |
USB: Allow autosuspend delay to equal 0
This patch (as867) adds an entry for the new power/autosuspend
attribute in Documentation/ABI/testing, and it changes the behavior of
the delay value. Now a delay of 0 means to autosuspend as soon as
possible, and negative values will prevent autosuspend.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'Documentation/ABI')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-bus-usb | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-bus-usb b/Documentation/ABI/testing/sysfs-bus-usb new file mode 100644 index 000000000000..00a84326325f --- /dev/null +++ b/Documentation/ABI/testing/sysfs-bus-usb @@ -0,0 +1,15 @@ +What: /sys/bus/usb/devices/.../power/autosuspend +Date: March 2007 +KernelVersion: 2.6.21 +Contact: Alan Stern <stern@rowland.harvard.edu> +Description: + Each USB device directory will contain a file named + power/autosuspend. This file holds the time (in seconds) + the device must be idle before it will be autosuspended. + 0 means the device will be autosuspended as soon as + possible. Negative values will prevent the device from + being autosuspended at all, and writing a negative value + will resume the device if it is already suspended. + + The autosuspend delay for newly-created devices is set to + the value of the usbcore.autosuspend module parameter. |