netdev - Re: [PATCH net-next v2 2/2] ravb: Add MII support for R-Car V4M

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Date: Mon, 24 Jun 2024 23:29:15 +0300
From: Sergey Shtylyov <s.shtylyov@....ru>
To: Geert Uytterhoeven <geert+renesas@...der.be>, Paul Barker
	<paul.barker.ct@...renesas.com>, Niklas Söderlund
	<niklas.soderlund+renesas@...natech.se>, Claudiu Beznea
	<claudiu.beznea.uj@...renesas.com>, Biju Das <biju.das.jz@...renesas.com>,
	"David S . Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>
CC: <netdev@...r.kernel.org>, <linux-renesas-soc@...r.kernel.org>
Subject: Re: [PATCH net-next v2 2/2] ravb: Add MII support for R-Car V4M

On 6/24/24 4:25 PM, Geert Uytterhoeven wrote:

> All EtherAVB instances on R-Car Gen3/Gen4 SoCs support the RGMII
> interface.  In addition, the first two EtherAVB instances on R-Car V4M
> also support the MII interface, but this is not yet supported by the
> driver.
> 
> Add support for MII on R-Car Gen4 by adding an R-Car Gen4-specific EMAC
> initialization function that selects the MII clock instead of the RGMII
> clock when the PHY interface is MII.  Note that all implementations of
> EtherAVB on R-Car Gen4 SoCs have the APSR register, but only MII-capable
> instances are documented to have the MIISELECT bit, which has a
> documented value of zero when reserved.
> 
> Signed-off-by: Geert Uytterhoeven <geert+renesas@...der.be>
> Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@...natech.se>

Reviewed-by: Sergey Shtylyov <s.shtylyov@....ru>

[...]

MBR, Sergey