can: flexcan: add documentation about mailbox organization
This patch adds a short documentation snippet about the mailbox organization as
it's regularly not correct in freescale's datasheets.
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
diff --git a/drivers/net/can/flexcan.c b/drivers/net/can/flexcan.c
index 0f5965c..eb3ebfb 100644
--- a/drivers/net/can/flexcan.c
+++ b/drivers/net/can/flexcan.c
@@ -230,6 +230,16 @@
u32 rxfir; /* 0x4c */
u32 _reserved3[12]; /* 0x50 */
struct flexcan_mb cantxfg[64]; /* 0x80 */
+ /* FIFO-mode:
+ * MB
+ * 0x080...0x08f 0 RX message buffer
+ * 0x090...0x0df 1-5 reserverd
+ * 0x0e0...0x0ff 6-7 8 entry ID table
+ * (mx25, mx28, mx35, mx53)
+ * 0x0e0...0x2df 6-7..37 8..128 entry ID table
+ * size conf'ed via ctrl2::RFFN
+ * (mx6, vf610)
+ */
u32 _reserved4[408];
u32 mecr; /* 0xae0 */
u32 erriar; /* 0xae4 */