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| author | David S. Miller <davem@davemloft.net> | 2011-01-24 15:16:11 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2011-01-24 15:16:11 -0800 |
| commit | 5955e7524790a2c8972487ab43347c28a1931521 (patch) | |
| tree | 0121e9869e070cdaf9007dacf595be900bce1f4c /Documentation | |
| parent | fd0273c5033630b8673554cd39660435d1ab2ac4 (diff) | |
| parent | 3a5655a5b545e9647c3437473ee3d815fe1b9050 (diff) | |
Merge branch 'can/at91_can-for-net-2.6' of git://git.pengutronix.de/git/mkl/linux-2.6
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-platform-at91 | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-platform-at91 b/Documentation/ABI/testing/sysfs-platform-at91 new file mode 100644 index 000000000000..4cc6a865ae66 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-platform-at91 @@ -0,0 +1,25 @@ +What: /sys/devices/platform/at91_can/net/<iface>/mb0_id +Date: January 2011 +KernelVersion: 2.6.38 +Contact: Marc Kleine-Budde <kernel@pengutronix.de> +Description: + Value representing the can_id of mailbox 0. + + Default: 0x7ff (standard frame) + + Due to a chip bug (errata 50.2.6.3 & 50.3.5.3 in + "AT91SAM9263 Preliminary 6249H-ATARM-27-Jul-09") the + contents of mailbox 0 may be send under certain + conditions (even if disabled or in rx mode). + + The workaround in the errata suggests not to use the + mailbox and load it with an unused identifier. + + In order to use an extended can_id add the + CAN_EFF_FLAG (0x80000000U) to the can_id. Example: + + - standard id 0x7ff: + echo 0x7ff > /sys/class/net/can0/mb0_id + + - extended id 0x1fffffff: + echo 0x9fffffff > /sys/class/net/can0/mb0_id |