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Viewing changes to Documentation/ABI/testing/sysfs-platform-at91

  • Committer: Package Import Robot
  • Author(s): Alessio Igor Bogani
  • Date: 2011-10-26 11:13:05 UTC
  • Revision ID: package-import@ubuntu.com-20111026111305-tz023xykf0i6eosh
Tags: upstream-3.2.0
Import upstream version 3.2.0

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Documentation/ABI/testing/sysfs-platform-at91
 
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What:           /sys/devices/platform/at91_can/net/<iface>/mb0_id
 
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Date:           January 2011
 
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KernelVersion:  2.6.38
 
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Contact:        Marc Kleine-Budde <kernel@pengutronix.de>
 
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Description:
 
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                Value representing the can_id of mailbox 0.
 
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                Default: 0x7ff (standard frame)
 
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                Due to a chip bug (errata 50.2.6.3 & 50.3.5.3 in
 
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                "AT91SAM9263 Preliminary 6249H-ATARM-27-Jul-09") the
 
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                contents of mailbox 0 may be send under certain
 
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                conditions (even if disabled or in rx mode).
 
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                The workaround in the errata suggests not to use the
 
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                mailbox and load it with an unused identifier.
 
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                In order to use an extended can_id add the
 
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                CAN_EFF_FLAG (0x80000000U) to the can_id. Example:
 
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                - standard id 0x7ff:
 
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                echo 0x7ff      > /sys/class/net/can0/mb0_id
 
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                - extended id 0x1fffffff:
 
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                echo 0x9fffffff > /sys/class/net/can0/mb0_id