From: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
To: Simon Horman <horms+renesas@verge.net.au>,
David Miller <davem@davemloft.net>,
Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Cc: Magnus Damm <magnus.damm@gmail.com>,
"netdev@vger.kernel.org" <netdev@vger.kernel.org>,
"linux-renesas-soc@vger.kernel.org"
<linux-renesas-soc@vger.kernel.org>,
Kazuya Mizuguchi <kazuya.mizuguchi.ks@renesas.com>
Subject: RE: [net-next 2/3] ravb: Remove undocumented processing
Date: Mon, 2 Sep 2019 10:49:04 +0000 [thread overview]
Message-ID: <TYAPR01MB454423D6A03D095C4EF282F0D8BE0@TYAPR01MB4544.jpnprd01.prod.outlook.com> (raw)
In-Reply-To: <20190902080603.5636-3-horms+renesas@verge.net.au>
Hi Simon-san,
> From: Simon Horman, Sent: Monday, September 2, 2019 5:06 PM
>
> From: Kazuya Mizuguchi <kazuya.mizuguchi.ks@renesas.com>
>
> This patch removes the use of the undocumented registers
> CDCR, LCCR, CERCR, CEECR and the undocumented BOC bit of the CCC register.
>
> Current documentation for EtherAVB (ravb) describes the offset of
> what the driver uses as the BOC bit as reserved and that only a value of
> 0 should be written. Furthermore, the offsets used for the undocumented
> registers are also considered reserved nd should not be written to.
>
> After some internal investigation with Renesas it remains unclear
> why this driver accesses these fields but regardless of what the historical
> reasons are the current code is considered incorrect.
>
> Signed-off-by: Kazuya Mizuguchi <kazuya.mizuguchi.ks@renesas.com>
> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Thank you for the patch!
Reviewed-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Best regards,
Yoshihiro Shimoda
next prev parent reply other threads:[~2019-09-02 10:49 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-02 8:06 [net-next 0/3] ravb: Remove use of undocumented registers Simon Horman
2019-09-02 8:06 ` [net-next 1/3] ravb: correct typo in FBP field of SFO register Simon Horman
2019-09-02 10:47 ` Yoshihiro Shimoda
2019-09-02 17:12 ` Sergei Shtylyov
2019-09-02 18:33 ` David Miller
2019-09-05 8:34 ` Simon Horman
2019-09-02 8:06 ` [net-next 2/3] ravb: Remove undocumented processing Simon Horman
2019-09-02 10:49 ` Yoshihiro Shimoda [this message]
2019-09-02 17:41 ` Sergei Shtylyov
2019-09-05 8:34 ` Simon Horman
2019-09-02 8:06 ` [net-next 3/3] ravb: TROCR register is only present on R-Car Gen3 Simon Horman
2019-09-02 10:51 ` Yoshihiro Shimoda
2019-09-02 17:54 ` Sergei Shtylyov
2019-09-02 8:16 ` [net-next 0/3] ravb: Remove use of undocumented registers Geert Uytterhoeven
2019-09-02 13:16 ` Chris Paterson
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