[参考译文] DP83TC812R-Q1：对寄存器0x45d 的 MDIO 读取返回所有0&#39

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https://e2e.ti.com/support/interface-group/interface/f/interface-forum/1133130/dp83tc812r-q1-mdio-read-of-register-0x45d-returns-all-0-s

器件型号：DP83TC812R-Q1

LED_0、LED_1和 RX_D2引脚通过外部2.49k 上拉电阻器进行引导、但寄存器0x45D 的间接寄存器访问返回错误-95

[1.951142]    --> DWC_ETH_QOS_MDIO_register
[1.951145]
[1.951145]*********     PHY 寄存器转储
[1.951609]    PHY 控制寄存器(基本模式控制寄存器)(0x0)= 0x2100
[1.958026]    PHY 状态寄存器(基本模式状态寄存器)(0x1)= 0x61
[1.964105]    PHY ID (PHY ID 1)(0x2)= 0x2000
[1.969915]    PHY ID (PHY ID 2)(0x3)= 0xa271
[1.974345]    自动导航广播(广播控制寄存器)(0x4)= 0x1
[1.978599]    自动协商(链路伙伴能力寄存器)(0x5)= 0x0
[1.984589]    自动导航扩展寄存器(扩展寄存器)(0x6)= 0x0
[1.990230]    自动导航 NP (0x7)= 0x2001
[1.995349]    扩展状态寄存器(0xF)= 0x0
[1.998908]    1000 CTL 寄存器(1000BASE-T 控制寄存器)(0x9)= 0x0
[2.003078]    1000 STS 注册器(1000BASE-T 状态)(0xA)= 0x100
[2.008980]    PHY CTL 寄存器(0x10)= 0x4
[2.014273]    PHY STS 寄存器(0x11)= 0x10b
[2.017918]    PHY Intr 状态寄存器(0x13)= 0x0
[2.021479]    PHY Intr EN 寄存器(0x12)= 0x4000
[2.025905]    智能速度寄存器(0x14)= 0x0
[2.029398]
[2.029398]
[2.033984]    phyaddr 0 phy_reg_read_status 0 MII_status 61
[2.033987]    DWC_ETH_QoS：在 ID/ADDR 0上检测到 PHY
[2.033992]    libphy：__mdiobus_register
[2.035318]    libphy：__mdiobus_register I 0
[2.035321]    libphy：__mdiobus_register I 0  bus->phy_mask FFFFFFFE
[2.035324]    libphy：get_phy_device
[2.035325]    libphy：get_phy_id
[2.036151]    libphy：get_phy_id * phy_id 2000a271
[2.036153]    libphy：PHY_DEVICE_CREATE
[2.036436]    libphy：mdiobus_scan
[2.036518]    libphy：PHY_BUS_MATCH
[2.036522]    libphy：PHY_BUS_MATCH
[2.036524]    libphy：PHY_BUS_MATCH
[2.036526]    libphy：PHY_BUS_MATCH
[2.036528]    libphy：PHY_BUS_MATCH
[2.036530]    libphy：PHY_BUS_MATCH
[2.036532]    libphy：PHY_BUS_MATCH
[2.036571]    libphy：PHY_PROBE
[2.036588]    TI DP83TC812CS2.0：DWC_phy-1：00的探测失败、错误-95
[2.036592]    libphy：PHY_BUS_MATCH
[2.036594]    libphy：PHY_BUS_matc