0001 What: /sys/devices/platform/at91_can/net/<iface>/mb0_id
0002 Date: January 2011
0003 KernelVersion: 2.6.38
0004 Contact: Marc Kleine-Budde <kernel@pengutronix.de>
0005 Description:
0006 Value representing the can_id of mailbox 0.
0007
0008 Default: 0x7ff (standard frame)
0009
0010 Due to a chip bug (errata 50.2.6.3 & 50.3.5.3 in
0011 "AT91SAM9263 Preliminary 6249H-ATARM-27-Jul-09") the
0012 contents of mailbox 0 may be send under certain
0013 conditions (even if disabled or in rx mode).
0014
0015 The workaround in the errata suggests not to use the
0016 mailbox and load it with an unused identifier.
0017
0018 In order to use an extended can_id add the
0019 CAN_EFF_FLAG (0x80000000U) to the can_id. Example:
0020
0021 - standard id 0x7ff::
0022
0023 echo 0x7ff > /sys/class/net/can0/mb0_id
0024
0025 - extended id 0x1fffffff::
0026
0027 echo 0x9fffffff > /sys/class/net/can0/mb0_id
