netdev - Re: [PATCH net v2 1/1] net: ravb: Wait for operation mode to be applied

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Message-ID: <110a8720-e7a6-ebf1-b286-4834dc32651c@omp.ru>
Date: Sat, 23 Dec 2023 22:43:33 +0300
From: Sergey Shtylyov <s.shtylyov@....ru>
To: Claudiu <claudiu.beznea@...on.dev>, <davem@...emloft.net>,
	<edumazet@...gle.com>, <kuba@...nel.org>, <pabeni@...hat.com>,
	<yoshihiro.shimoda.uh@...esas.com>, <wsa+renesas@...g-engineering.com>,
	<mitsuhiro.kimura.kc@...esas.com>
CC: <netdev@...r.kernel.org>, <linux-renesas-soc@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, Claudiu Beznea
	<claudiu.beznea.uj@...renesas.com>
Subject: Re: [PATCH net v2 1/1] net: ravb: Wait for operation mode to be
 applied

On 12/22/23 2:35 PM, Claudiu wrote:

> From: Claudiu Beznea <claudiu.beznea.uj@...renesas.com>
> 
> CSR.OPS bits specify the current operating mode and (according to
> documentation) they are updated by HW when the operating mode change
> request is processed. To comply with this check CSR.OPS before proceeding.
> 
> Commit introduces ravb_set_opmode() that does all the necessities for
> setting the operating mode (set DMA.CCC and wait for CSR.OPS) and call it

   What's DMA.CCC? Maybe CCC.OPC?

> where needed. This should comply with all the HW manuals requirements as
> different manual variants specify that different modes need to be checked
> in CSR.OPS when setting DMA.CCC.
> 
> Fixes: c156633f1353 ("Renesas Ethernet AVB driver proper")
> Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@...renesas.com>
[...]

MBR, Sergey