1 What: /sys/devices/platform/at91_can 1 What: /sys/devices/platform/at91_can/net/<iface>/mb0_id
2 Date: January 2011 2 Date: January 2011
3 KernelVersion: 2.6.38 3 KernelVersion: 2.6.38
4 Contact: Marc Kleine-Budde <kernel@pengu 4 Contact: Marc Kleine-Budde <kernel@pengutronix.de>
5 Description: 5 Description:
6 Value representing the can_id 6 Value representing the can_id of mailbox 0.
7 7
8 Default: 0x7ff (standard frame 8 Default: 0x7ff (standard frame)
9 9
10 Due to a chip bug (errata 50.2 10 Due to a chip bug (errata 50.2.6.3 & 50.3.5.3 in
11 "AT91SAM9263 Preliminary 6249H 11 "AT91SAM9263 Preliminary 6249H-ATARM-27-Jul-09") the
12 contents of mailbox 0 may be s 12 contents of mailbox 0 may be send under certain
13 conditions (even if disabled o 13 conditions (even if disabled or in rx mode).
14 14
15 The workaround in the errata s 15 The workaround in the errata suggests not to use the
16 mailbox and load it with an un 16 mailbox and load it with an unused identifier.
17 17
18 In order to use an extended ca 18 In order to use an extended can_id add the
19 CAN_EFF_FLAG (0x80000000U) to 19 CAN_EFF_FLAG (0x80000000U) to the can_id. Example:
20 20
21 - standard id 0x7ff:: 21 - standard id 0x7ff::
22 22
23 echo 0x7ff > /sys/cla 23 echo 0x7ff > /sys/class/net/can0/mb0_id
24 24
25 - extended id 0x1fffffff:: 25 - extended id 0x1fffffff::
26 26
27 echo 0x9fffffff > /sys/cla 27 echo 0x9fffffff > /sys/class/net/can0/mb0_id
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