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Tue, 10 Feb 2026 13:12:16 +0000 Received: from linux by shell.armlinux.org.uk with local (Exim 4.98.2) (envelope-from ) id 1vpnXI-000000002og-2bsV; Tue, 10 Feb 2026 13:12:12 +0000 Date: Tue, 10 Feb 2026 13:12:12 +0000 From: "Russell King (Oracle)" To: Joey Lu Cc: andrew+netdev@lunn.ch, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, mcoquelin.stm32@gmail.com, richardcochran@gmail.com, alexandre.torgue@foss.st.com, joabreu@synopsys.com, ychuang3@nuvoton.com, schung@nuvoton.com, yclu4@nuvoton.com, peppe.cavallaro@st.com, linux-arm-kernel@lists.infradead.org, netdev@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, openbmc@lists.ozlabs.org, linux-stm32@st-md-mailman.stormreply.com, Andrew Lunn Subject: Re: [PATCH net-next v12 3/3] net: stmmac: dwmac-nuvoton: Add dwmac glue for Nuvoton MA35 family Message-ID: References: <20260210052226.3005666-1-a0987203069@gmail.com> <20260210052226.3005666-4-a0987203069@gmail.com> X-Mailing-List: openbmc@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Subscribe: , , List-Unsubscribe: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260210052226.3005666-4-a0987203069@gmail.com> Sender: Russell King (Oracle) Please note that net-next is currently closed, so you should be sending net-next patches with "RFC". See section 1.4 of: https://docs.kernel.org/process/maintainer-netdev.html On Tue, Feb 10, 2026 at 01:22:26PM +0800, Joey Lu wrote: > +static int nvt_gmac_setup(struct platform_device *pdev) > +{ > + struct device *dev = &pdev->dev; > + phy_interface_t phy_mode; > + struct regmap *regmap; > + u32 macid, miscr, reg; > + int ret; > + > + regmap = syscon_regmap_lookup_by_phandle_args(dev->of_node, "nuvoton,sys", 1, &macid); > + if (IS_ERR(regmap)) > + ret = dev_err_probe(dev, PTR_ERR(regmap), "Failed to get sys register\n"); > + > + if (macid > 1) > + ret = dev_err_probe(dev, -EINVAL, "Invalid sys arguments\n"); > + > + if (of_get_phy_mode(pdev->dev.of_node, &phy_mode)) > + ret = dev_err_probe(dev, -EINVAL, "Missing phy mode property\n"); If you pass in the plat_dat to this function, then you have access to plat_dat->phy_interface. I went through all the dwmac glue code and removed such PHY interface gets, so please don't introduce new instances. > + > + miscr = (macid == 0) ? NVT_REG_SYS_GMAC0MISCR : NVT_REG_SYS_GMAC1MISCR; I find the use of "miscr" to be the register offset, and "reg" to be the register value is confusing. Normally they're the other way around. > + > + switch (phy_mode) { > + case PHY_INTERFACE_MODE_RGMII: > + case PHY_INTERFACE_MODE_RGMII_ID: > + case PHY_INTERFACE_MODE_RGMII_RXID: > + case PHY_INTERFACE_MODE_RGMII_TXID: > + ret = nvt_gmac_get_delay(dev, "rx-internal-delay-ps"); > + if (ret < 0) > + return ret; > + reg = FIELD_PREP(NVT_RX_DELAY_MASK, ret); > + > + ret = nvt_gmac_get_delay(dev, "tx-internal-delay-ps"); > + if (ret < 0) > + return ret; > + reg |= FIELD_PREP(NVT_TX_DELAY_MASK, ret); > + break; > + case PHY_INTERFACE_MODE_RMII: > + reg = NVT_MISCR_RMII; > + break; > + default: > + return dev_err_probe(dev, -EINVAL, "Unsupported phy-mode (%d)\n", phy_mode); > + } > + > + regmap_update_bits(regmap, miscr, > + NVT_RX_DELAY_MASK | NVT_TX_DELAY_MASK | NVT_MISCR_RMII, reg); Please consider programming the NVT_MISCR_RMII bit via the plat_dat->set_phy_intf_sel() method. Is this register preserved over suspend/resume ? Thanks. -- RMK's Patch system: https://www.armlinux.org.uk/developer/patches/ FTTP is here! 80Mbps down 10Mbps up. Decent connectivity at last!