Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::3:2 as permitted sender) client-ip=2620:137:e000::3:2;
Date:   Tue, 31 Oct 2023 13:48:10 +0100
From:   Andrew Lunn <andrew@lunn.ch>
To:     Parthiban.Veerasooran@microchip.com
Cc:     davem@davemloft.net, edumazet@google.com, kuba@kernel.org,
        pabeni@redhat.com, robh+dt@kernel.org,
        krzysztof.kozlowski+dt@linaro.org, conor+dt@kernel.org,
        corbet@lwn.net, Steen.Hegelund@microchip.com,
        rdunlap@infradead.org, horms@kernel.org, casper.casan@gmail.com,
        netdev@vger.kernel.org, devicetree@vger.kernel.org,
        linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org,
        Horatiu.Vultur@microchip.com, Woojung.Huh@microchip.com,
        Nicolas.Ferre@microchip.com, UNGLinuxDriver@microchip.com,
        Thorsten.Kummermehr@microchip.com
Subject: Re: [PATCH net-next v2 5/9] net: ethernet: oa_tc6: implement
 internal PHY initialization
Message-ID: <c67b0e57-b87b-45cd-b3fd-be11b0670b0d@lunn.ch>
References: <20231023154649.45931-1-Parthiban.Veerasooran@microchip.com>
 <20231023154649.45931-6-Parthiban.Veerasooran@microchip.com>
 <5c240b3b-60c2-45bb-8861-e3a8de28d00f@lunn.ch>
 <7873124e-d7b2-4983-9be3-f85865d46de2@microchip.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <7873124e-d7b2-4983-9be3-f85865d46de2@microchip.com>
Precedence: bulk

> >> +             tc6->mdiobus = mdiobus_alloc();
> >> +             if (!tc6->mdiobus) {
> >> +                     netdev_err(tc6->netdev, "MDIO bus alloc failed\n");
> >> +                     return -ENODEV;
> >> +             }
> >> +
> >> +             tc6->mdiobus->phy_mask = ~(u32)BIT(1);
> > 
> > Does the standard define this ? BIT(1), not BIT(0)?
> Ok, I think here is a typo. Will correct it.

There is still the open question, does the standard define this? If
not, a vendor might decide to use some other address, not 0. So it
might be better to not set a mask and scan the whole bus.
phy_find_first() should then work, no matter what address it is using.

	Andrew