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20 lines
1008 B
20 lines
1008 B
What: /sys/devices/.../online |
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Date: April 2013 |
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Contact: Rafael J. Wysocki <[email protected]> |
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Description: |
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The /sys/devices/.../online attribute is only present for |
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devices whose bus types provide .online() and .offline() |
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callbacks. The number read from it (0 or 1) reflects the value |
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of the device's 'offline' field. If that number is 1 and '0' |
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(or 'n', or 'N') is written to this file, the device bus type's |
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.offline() callback is executed for the device and (if |
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successful) its 'offline' field is updated accordingly. In |
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turn, if that number is 0 and '1' (or 'y', or 'Y') is written to |
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this file, the device bus type's .online() callback is executed |
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for the device and (if successful) its 'offline' field is |
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updated as appropriate. |
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After a successful execution of the bus type's .offline() |
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callback the device cannot be used for any purpose until either |
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it is removed (i.e. device_del() is called for it), or its bus |
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type's .online() is exeucted successfully.
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