Explorer
/sys/dev/char/4:88/device/driver/00:00:0.0/firmware_node/subsystem/devices/device:01
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..
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physical_node
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PNP0303:00
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PNP0501:00
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PNP0700:00
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PNP0B00:00
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PNP0F13:00
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power
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QEMU0001:00
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subsystem
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wakeup
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adr
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path
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uevent