netdev - Re: [net-next 6/6] can: mcp251xfd: mcp251xfd_regmap_crc_read(): work around broken CRC on TBC register

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Date:   Thu, 20 May 2021 10:29:48 +0000
From:   Patrick Menschel <menschel.p@...teo.de>
To:     Marc Kleine-Budde <mkl@...gutronix.de>
Cc:     Drew Fustini <drew@...gleboard.org>, netdev@...r.kernel.org,
        linux-can@...r.kernel.org, Will C <will@...china.cc>
Subject: Re: [net-next 6/6] can: mcp251xfd: mcp251xfd_regmap_crc_read(): work
 around broken CRC on TBC register

Am 10.05.21 um 09:45 schrieb Marc Kleine-Budde:

Just checked that particular pi3b+. 2 errors in 10 days.

$ dmesg | grep -i crc

[    8.335215] mcp251xfd spi0.1 can0: MCP2518FD rev0.0 (-RX_INT
-MAB_NO_WARN +CRC_REG +CRC_RX +CRC_TX +ECC -HD c:40.00MHz m:20.00MHz
r:17.00MHz e:16.66MHz) successfully initialized.

[    8.362778] mcp251xfd spi0.0 can1: MCP2518FD rev0.0 (-RX_INT
-MAB_NO_WARN +CRC_REG +CRC_RX +CRC_TX +ECC -HD c:40.00MHz m:20.00MHz
r:17.00MHz e:16.66MHz) successfully initialized.

[178691.606232] mcp251xfd spi0.0 mcp0: CRC read error at address 0x0010
(length=4, data=84 35 73 16, CRC=0x9b26) retrying.

[188341.664546] mcp251xfd spi0.0 mcp0: CRC read error at address 0x0010
(length=4, data=14 df c5 f5, CRC=0xe06b) retrying.


Regards,
Patrick