netdev - Re: [PATCH v3] net: phy: DP83822: enable rgmii mode if phy_interface_is

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Message-ID: <Yot7OD8MAQPttmyV@lunn.ch>
Date:   Mon, 23 May 2022 14:16:56 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Tommaso Merciai <tommaso.merciai@...rulasolutions.com>
Cc:     michael@...rulasolutions.com, alberto.bianchi@...rulasolutions.com,
        linux-amarula@...rulasolutions.com, linuxfancy@...glegroups.com,
        Heiner Kallweit <hkallweit1@...il.com>,
        Russell King <linux@...linux.org.uk>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3] net: phy: DP83822: enable rgmii mode if
 phy_interface_is_rgmii

On Mon, May 23, 2022 at 08:57:54AM +0200, Tommaso Merciai wrote:
> On Sat, May 21, 2022 at 08:39:02PM +0200, Andrew Lunn wrote:
> > On Sat, May 21, 2022 at 01:58:46AM +0200, Tommaso Merciai wrote:
> > > RGMII mode can be enable from dp83822 straps, and also writing bit 9
> > > of register 0x17 - RMII and Status Register (RCSR).
> > > When phy_interface_is_rgmii rgmii mode must be enabled, same for
> > > contrary, this prevents malconfigurations of hw straps
> > > 
> > > References:
> > >  - https://www.ti.com/lit/gpn/dp83822i p66
> > > 
> > > Signed-off-by: Tommaso Merciai <tommaso.merciai@...rulasolutions.com>
> > > Co-developed-by: Michael Trimarchi <michael@...rulasolutions.com>
> > > Suggested-by: Alberto Bianchi <alberto.bianchi@...rulasolutions.com>
> > > Tested-by: Tommaso Merciai <tommaso.merciai@...rulasolutions.com>
> > 
> > Reviewed-by: Andrew Lunn <andrew@...n.ch>
> > 
> > If you want to, you could go further. If bit 9 is clear, bit 5 defines
> > the mode, either RMII or MII. There are interface modes defined for
> > these, so you could get bit 5 as well.
> 
> Hi Andrew,
> Thanks for the review and for your time.
> I'll try to go further, like you suggest :)

Hi Tomaso

This patch has been accepted, so you will need to submit an
incremental patch. I also expect net-next to close soon for the merge
window, so you might want to wait two weeks before submitting.

	Andrew