From: Marc Kleine-Budde <mkl@pengutronix.de>
Date: Wed, 17 Sep 2014 10:50:48 +0000 (+0200)
Subject: can: flexcan: add documentation about mailbox organization
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=66a6ef02294f066b5e059373e798b700b4b73b3b;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

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 0f5965cc3fbc..eb3ebfb47442 100644
--- a/drivers/net/can/flexcan.c
+++ b/drivers/net/can/flexcan.c
@@ -230,6 +230,16 @@ struct flexcan_regs {
 	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 */