| Marc Kleine-Budde | 3a5655a | 2011-01-10 20:44:22 +0100 | [diff] [blame] | 1 | What: /sys/devices/platform/at91_can/net/<iface>/mb0_id |
| 2 | Date: January 2011 |
| 3 | KernelVersion: 2.6.38 |
| 4 | Contact: Marc Kleine-Budde <kernel@pengutronix.de> |
| 5 | Description: |
| 6 | Value representing the can_id of mailbox 0. |
| 7 | |
| 8 | Default: 0x7ff (standard frame) |
| 9 | |
| 10 | Due to a chip bug (errata 50.2.6.3 & 50.3.5.3 in |
| 11 | "AT91SAM9263 Preliminary 6249H-ATARM-27-Jul-09") the |
| 12 | contents of mailbox 0 may be send under certain |
| 13 | conditions (even if disabled or in rx mode). |
| 14 | |
| 15 | The workaround in the errata suggests not to use the |
| 16 | mailbox and load it with an unused identifier. |
| 17 | |
| 18 | In order to use an extended can_id add the |
| 19 | CAN_EFF_FLAG (0x80000000U) to the can_id. Example: |
| 20 | |
| 21 | - standard id 0x7ff: |
| 22 | echo 0x7ff > /sys/class/net/can0/mb0_id |
| 23 | |
| 24 | - extended id 0x1fffffff: |
| 25 | echo 0x9fffffff > /sys/class/net/can0/mb0_id |