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[94.29.32.34]) by smtp.gmail.com with ESMTPSA id 2adb3069b0e04-5b74c409155sm3717504e87.73.2026.09.09.15.50.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 09 Sep 2026 15:50:05 -0700 (PDT) From: Andrey Korshunov To: devnull+hystericaldragons.proton.me@kernel.org Cc: HystericalDragons@proton.me, amadeus@jmu.edu.cn, jensenhuang@friendlyarm.com, diederik@cknow-tech.com, heiko@sntech.de, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, linux-rockchip@lists.infradead.org, linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v3 1/5] arm64: dts: rockchip: Reset the NanoPi Zero2 PHY from the MDIO bus Date: Thu, 10 Sep 2026 01:50:02 +0300 Message-ID: <20260909225002.976-1-razor1702@gmail.com> X-Mailer: git-send-email 2.54.0.windows.1 In-Reply-To: <20260909-r28s-upstream-v3-1-ee3e1a34a353@proton.me> References: <20260909-r28s-upstream-v3-1-ee3e1a34a353@proton.me> Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit On Wed Sep 9, 2026 at 10:33 PM CST, 安容 via B4 Relay wrote: > Describe the reset on the MDIO bus instead. __mdiobus_register() asserts > and releases the bus level reset-gpios before any device on the bus is > registered, so the PHY responds whatever state the bootloader left it > in. Confirmed. And thanks for catching the deprecated properties I had suggested - I had not read snps,dwmac.yaml, and dt-validate does not warn on deprecated ones, so none of the checks I ran would have told me either. I ran it both ways on a NanoPi R28S - same pin, same RTL8211F on mdio1 - with two images that differ only in those nine lines of device tree. Both are 6.18.44 with mainline U-Boot 2026.07 (generic-rk3528). Reset in the PHY node, the way mainline describes it today: [ 0.217516] mdio_bus stmmac-0: MDIO device at address 1 is missing. [ 24.566496] rk_gmac-dwmac ffbe0000.ethernet eth0: cannot attach PHY and the port stays down. Reset on the MDIO bus, as this patch does it: [ 14.608938] rk_gmac-dwmac ffbe0000.ethernet eth0: PHY [stmmac-0:01] driver [RTL8211F Gigabit Ethernet] (irq=POLL) [ 17.770103] rk_gmac-dwmac ffbe0000.ethernet eth0: Link is Up - 1Gbps/Full - flow control rx/tx So U-Boot 2026.07 does leave the pin asserted, the same as the 2025.10 I first saw this on - the commit message holds for the current release too, not just the one I happened to report it from. The one thing I cannot confirm is the board in the subject: this is an R28S, not a Zero2, which I do not have. 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[94.29.32.34]) by smtp.gmail.com with ESMTPSA id 2adb3069b0e04-5b74c409155sm3717504e87.73.2026.09.09.15.50.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 09 Sep 2026 15:50:05 -0700 (PDT) From: Andrey Korshunov To: devnull+hystericaldragons.proton.me@kernel.org Cc: HystericalDragons@proton.me, amadeus@jmu.edu.cn, jensenhuang@friendlyarm.com, diederik@cknow-tech.com, heiko@sntech.de, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, linux-rockchip@lists.infradead.org, linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v3 1/5] arm64: dts: rockchip: Reset the NanoPi Zero2 PHY from the MDIO bus Date: Thu, 10 Sep 2026 01:50:02 +0300 Message-ID: <20260909225002.976-1-razor1702@gmail.com> X-Mailer: git-send-email 2.54.0.windows.1 In-Reply-To: <20260909-r28s-upstream-v3-1-ee3e1a34a353@proton.me> References: <20260909-r28s-upstream-v3-1-ee3e1a34a353@proton.me> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260909_155009_866385_68EF8B13 X-CRM114-Status: GOOD ( 14.95 ) X-BeenThere: linux-rockchip@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Upstream kernel work for Rockchip platforms List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: "Linux-rockchip" Errors-To: linux-rockchip-bounces+linux-rockchip=archiver.kernel.org@lists.infradead.org T24gV2VkIFNlcCA5LCAyMDI2IGF0IDEwOjMzIFBNIENTVCwg5a6J5a65IHZpYSBCNCBSZWxheSB3 cm90ZToKPiBEZXNjcmliZSB0aGUgcmVzZXQgb24gdGhlIE1ESU8gYnVzIGluc3RlYWQuIF9fbWRp b2J1c19yZWdpc3RlcigpIGFzc2VydHMKPiBhbmQgcmVsZWFzZXMgdGhlIGJ1cyBsZXZlbCByZXNl dC1ncGlvcyBiZWZvcmUgYW55IGRldmljZSBvbiB0aGUgYnVzIGlzCj4gcmVnaXN0ZXJlZCwgc28g dGhlIFBIWSByZXNwb25kcyB3aGF0ZXZlciBzdGF0ZSB0aGUgYm9vdGxvYWRlciBsZWZ0IGl0Cj4g aW4uCgpDb25maXJtZWQuIEFuZCB0aGFua3MgZm9yIGNhdGNoaW5nIHRoZSBkZXByZWNhdGVkIHBy b3BlcnRpZXMgSSBoYWQKc3VnZ2VzdGVkIC0gSSBoYWQgbm90IHJlYWQgc25wcyxkd21hYy55YW1s LCBhbmQgZHQtdmFsaWRhdGUgZG9lcyBub3Qgd2FybgpvbiBkZXByZWNhdGVkIG9uZXMsIHNvIG5v bmUgb2YgdGhlIGNoZWNrcyBJIHJhbiB3b3VsZCBoYXZlIHRvbGQgbWUgZWl0aGVyLgoKSSByYW4g aXQgYm90aCB3YXlzIG9uIGEgTmFub1BpIFIyOFMgLSBzYW1lIHBpbiwgc2FtZSBSVEw4MjExRiBv biBtZGlvMSAtCndpdGggdHdvIGltYWdlcyB0aGF0IGRpZmZlciBvbmx5IGluIHRob3NlIG5pbmUg bGluZXMgb2YgZGV2aWNlIHRyZWUuIEJvdGgKYXJlIDYuMTguNDQgd2l0aCBtYWlubGluZSBVLUJv b3QgMjAyNi4wNyAoZ2VuZXJpYy1yazM1MjgpLgoKUmVzZXQgaW4gdGhlIFBIWSBub2RlLCB0aGUg d2F5IG1haW5saW5lIGRlc2NyaWJlcyBpdCB0b2RheToKCiAgWyAgICAwLjIxNzUxNl0gbWRpb19i dXMgc3RtbWFjLTA6IE1ESU8gZGV2aWNlIGF0IGFkZHJlc3MgMSBpcyBtaXNzaW5nLgogIFsgICAy NC41NjY0OTZdIHJrX2dtYWMtZHdtYWMgZmZiZTAwMDAuZXRoZXJuZXQgZXRoMDogY2Fubm90IGF0 dGFjaCBQSFkKCmFuZCB0aGUgcG9ydCBzdGF5cyBkb3duLiBSZXNldCBvbiB0aGUgTURJTyBidXMs IGFzIHRoaXMgcGF0Y2ggZG9lcyBpdDoKCiAgWyAgIDE0LjYwODkzOF0gcmtfZ21hYy1kd21hYyBm ZmJlMDAwMC5ldGhlcm5ldCBldGgwOiBQSFkgW3N0bW1hYy0wOjAxXSBkcml2ZXIgW1JUTDgyMTFG IEdpZ2FiaXQgRXRoZXJuZXRdIChpcnE9UE9MTCkKICBbICAgMTcuNzcwMTAzXSBya19nbWFjLWR3 bWFjIGZmYmUwMDAwLmV0aGVybmV0IGV0aDA6IExpbmsgaXMgVXAgLSAxR2Jwcy9GdWxsIC0gZmxv dyBjb250cm9sIHJ4L3R4CgpTbyBVLUJvb3QgMjAyNi4wNyBkb2VzIGxlYXZlIHRoZSBwaW4gYXNz ZXJ0ZWQsIHRoZSBzYW1lIGFzIHRoZSAyMDI1LjEwIEkKZmlyc3Qgc2F3IHRoaXMgb24gLSB0aGUg Y29tbWl0IG1lc3NhZ2UgaG9sZHMgZm9yIHRoZSBjdXJyZW50IHJlbGVhc2UgdG9vLApub3QganVz dCB0aGUgb25lIEkgaGFwcGVuZWQgdG8gcmVwb3J0IGl0IGZyb20uCgpUaGUgb25lIHRoaW5nIEkg Y2Fubm90IGNvbmZpcm0gaXMgdGhlIGJvYXJkIGluIHRoZSBzdWJqZWN0OiB0aGlzIGlzIGFuClIy OFMsIG5vdCBhIFplcm8yLCB3aGljaCBJIGRvIG5vdCBoYXZlLgoKVGVzdGVkLWJ5OiBBbmRyZXkg S29yc2h1bm92IDxyYXpvcjE3MDJAZ21haWwuY29tPgoKQW5kcmV5CgpfX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwpMaW51eC1yb2NrY2hpcCBtYWlsaW5nIGxp c3QKTGludXgtcm9ja2NoaXBAbGlzdHMuaW5mcmFkZWFkLm9yZwpodHRwOi8vbGlzdHMuaW5mcmFk ZWFkLm9yZy9tYWlsbWFuL2xpc3RpbmZvL2xpbnV4LXJvY2tjaGlwCg==