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[73.92.48.112]) by smtp.gmail.com with ESMTPSA id b3sm4102861pfi.179.2021.08.13.22.22.34 (version=TLS1_2 cipher=ECDHE-ECDSA-CHACHA20-POLY1305 bits=256/256); Fri, 13 Aug 2021 22:22:35 -0700 (PDT) Date: Fri, 13 Aug 2021 22:22:29 -0700 From: Tao Ren To: Andrew Lunn Cc: Joel Stanley , Rob Herring , Andrew Jeffery , devicetree , Linux ARM , linux-aspeed , Linux Kernel Mailing List , OpenBMC Maillist , Tao Ren Subject: Re: [PATCH v2 4/6] ARM: dts: aspeed: Add Facebook Cloudripper (AST2600) BMC Message-ID: <20210814052228.GA1298@taoren-ubuntu-R90MNF91> References: <20210805222818.8391-1-rentao.bupt@gmail.com> <20210805222818.8391-5-rentao.bupt@gmail.com> <20210813034016.GA21895@taoren-ubuntu-R90MNF91> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.9.4 (2018-02-28) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210813_222238_170452_CD47E15E X-CRM114-Status: GOOD ( 21.80 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi Andrew, On Fri, Aug 13, 2021 at 04:45:58PM +0200, Andrew Lunn wrote: > On Thu, Aug 12, 2021 at 08:40:17PM -0700, Tao Ren wrote: > > On Fri, Aug 13, 2021 at 01:29:17AM +0000, Joel Stanley wrote: > > > On Thu, 5 Aug 2021 at 22:28, wrote: > > > > +&mdio1 { > > > > + status = "okay"; > > > > > > You're enabling this but it looks like it's unused? > > > > Thanks Joel for the careful review. The MDIO controller is not paired > > with BMC MAC; instead, it's connected to the MDC/MDIO interface of the > > on-board switch (whose ports are connected to BMC, Host and front panel > > management port). > > What switch is it? Is there a DSA driver for it? drivers/net/dsa/* > Ideally you want Linux to be controlling the switch, in the standard > linux way. > > Andrew Thanks for jumping in. We are using BCM5389 and the MDIO bus is used to access BCM5389 MDC/MDIO interface in Pseudo-PHY mode. I didn't know drivers/net/dsa, but let me check out the drivers and see if it works in the Cloudripper environment. Thanks, Tao _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel