RK3568 学习笔记 : u-boot 千兆网络无法 ping 通PC问题的解决方法二

参考

RK3568 学习笔记 : u-boot 千兆网络无法 ping 通PC问题的解决

前言

rk3568 rockchip 提供的 u-boot，默认的设备树需要读取单独分区 resouce.img 镜像中的设备树文件，也就是 Linux 内核的设备树 dtb 文件，gmac 网络才能正常的 ping 通 PC 主机。
如果使用 u-boot 默认的设备树，虽然可以正常的识别到 gmac 设备，但是无法 ping 通 PC 主机，也就是 u-boot 下网络功能异常。

环境

正点原子 RK3568 开发板： AtomPi-CA1 与 DLRK3568 开发板
虚拟机 ubuntu 20.04 单独编译开发板提供的 u-boot，并去掉 rockchip 一些定制的选项，如使用 resouce 分区等

设备树问题

如果使用 u-boot 默认的设备树，gmac 网络无法 ping 通，如果把 u-boot 下的整个设备树，替换为 rockchip Linux kernel 中的设备树，gmac 网络可以正常 ping 通，说明问题点在设备树的配置上。
u-boot 下的设备树，如果全部替换为 Linux kernel 的设备树，比较的麻烦，需要替换很多文件，包括 dt-bindings 头文件等，因为 u-boot 下的设备树与 Linux kernel 的设备树属于两套独立的设备树。Linux kernel 的设备树相对齐全与复杂一些。
通过对比 u-boot 与 Linux kernel 的设备树，发现 gmac 的相关的设置均一致，排除了 gmac 设置问题。
那到底什么会影响 gmac 的网络功能呢？ gmac 网络设备能正常的初始化，没有报错。

问题排查

通过查看开发板的原理图，发现了一些思路，电源管理，也就是 Linux 内核的设备树，与 rk809 pmic 的电源管理配置，而 u-boot 下，并没有这个配置。
经过仔细查看原理图，发现 gmac 的 io 供电 vcc_1v8，来自 rk809 pmic 电源管理芯片，而这个 pmic 电源管理芯片，默认需要使用 i2c 通信配置，如果不配置，默认的配置，可能供电异常。

在这里插入图片描述

抱着尝试的心态，在 u-boot 下的开发板设备树文件中，增加 rk809 相关的配置（来自 Linux kernel 设备树配置），并使能了电源域，测试发现，网络可以 Ping 通了，说明网络 u-boot 默认设备树缺少 pmic 电源管理部分，造成网络无法正常 ping 通
增加的电源管理部分 rk809 相关的设备树配置如下：DLRK3568 开发板 arch/arm/dts/atk-dlrk3568.dts 文件

/** SPDX-License-Identifier:     GPL-2.0+** (C) Copyright 2020 Rockchip Electronics Co., Ltd*//dts-v1/;
#include "rk3568.dtsi"
#include "rk3568-u-boot.dtsi"
#include <dt-bindings/input/input.h>/ {model = "ATK-DLRK3568 Rockchip RK3568 Board";compatible = "rockchip,rk3568-evb", "rockchip,rk3568";dc_12v: dc-12v {compatible = "regulator-fixed";regulator-name = "dc_12v";regulator-always-on;regulator-boot-on;regulator-min-microvolt = <12000000>;regulator-max-microvolt = <12000000>;};vcc3v3_sys: vcc3v3-sys {compatible = "regulator-fixed";regulator-name = "vcc3v3_sys";regulator-always-on;regulator-boot-on;regulator-min-microvolt = <3300000>;regulator-max-microvolt = <3300000>;vin-supply = <&dc_12v>;};vcc5v0_sys: vcc5v0-sys {compatible = "regulator-fixed";regulator-name = "vcc5v0_sys";regulator-always-on;regulator-boot-on;regulator-min-microvolt = <5000000>;regulator-max-microvolt = <5000000>;vin-supply = <&dc_12v>;};vcc5v0_usb: vcc5v0-usb {compatible = "regulator-fixed";regulator-name = "vcc5v0_usb";regulator-always-on;regulator-boot-on;regulator-min-microvolt = <5000000>;regulator-max-microvolt = <5000000>;vin-supply = <&dc_12v>;};adc-keys {compatible = "adc-keys";io-channels = <&saradc 0>;io-channel-names = "buttons";keyup-threshold-microvolt = <1800000>;u-boot,dm-spl;status = "okay";volumeup-key {u-boot,dm-spl;linux,code = <KEY_VOLUMEUP>;label = "volume up";press-threshold-microvolt = <17822>;};volumedown-key {u-boot,dm-spl;label = "volume down";linux,code = <KEY_VOLUMEDOWN>;press-threshold-microvolt = <415385>;};};
};&mdio0 {rgmii_phy0: phy@0 {compatible = "ethernet-phy-ieee802.3-c22";reg = <0x0>;};
};&mdio1 {rgmii_phy1: phy@0 {compatible = "ethernet-phy-ieee802.3-c22";reg = <0x0>;};
};&gmac0 {phy-mode = "rgmii";clock_in_out = "output";snps,reset-gpio = <&gpio2 RK_PD3 GPIO_ACTIVE_LOW>;snps,reset-active-low;/* Reset time is 20ms, 100ms for rtl8211f */snps,reset-delays-us = <0 20000 100000>;assigned-clocks = <&cru SCLK_GMAC0_RX_TX>, <&cru SCLK_GMAC0>;assigned-clock-parents = <&cru SCLK_GMAC0_RGMII_SPEED>;assigned-clock-rates = <0>, <125000000>;pinctrl-names = "default";pinctrl-0 = <&gmac0_miim&gmac0_tx_bus2&gmac0_rx_bus2&gmac0_rgmii_clk&gmac0_rgmii_bus>;tx_delay = <0x3c>;rx_delay = <0x2f>;phy-handle = <&rgmii_phy0>;status = "okay";
};&gmac1 {phy-mode = "rgmii";clock_in_out = "output";snps,reset-gpio = <&gpio2 RK_PD1 GPIO_ACTIVE_LOW>;snps,reset-active-low;/* Reset time is 20ms, 100ms for rtl8211f */snps,reset-delays-us = <0 20000 100000>;assigned-clocks = <&cru SCLK_GMAC1_RX_TX>, <&cru SCLK_GMAC1>;assigned-clock-parents = <&cru SCLK_GMAC1_RGMII_SPEED>;assigned-clock-rates = <0>, <125000000>;pinctrl-names = "default";pinctrl-0 = <&gmac1m1_miim&gmac1m1_tx_bus2&gmac1m1_rx_bus2&gmac1m1_rgmii_clk&gmac1m1_rgmii_bus>;tx_delay = <0x4f>;rx_delay = <0x26>;phy-handle = <&rgmii_phy1>;status = "okay";
};&crypto {status = "okay";
};&uart2 {status = "okay";
};&i2c0 {status = "okay";vdd_cpu: tcs4525@1c {compatible = "tcs,tcs452x";reg = <0x1c>;vin-supply = <&vcc5v0_sys>;regulator-compatible = "fan53555-reg";regulator-name = "vdd_cpu";regulator-min-microvolt = <712500>;regulator-max-microvolt = <1390000>;regulator-init-microvolt = <900000>;regulator-ramp-delay = <2300>;fcs,suspend-voltage-selector = <1>;regulator-boot-on;regulator-always-on;regulator-state-mem {regulator-off-in-suspend;};};rk809: pmic@20 {compatible = "rockchip,rk809";reg = <0x20>;interrupt-parent = <&gpio0>;interrupts = <3 IRQ_TYPE_LEVEL_LOW>;pinctrl-names = "default", "pmic-sleep","pmic-power-off", "pmic-reset";pinctrl-0 = <&pmic_int>;pinctrl-1 = <&soc_slppin_slp>, <&rk817_slppin_slp>;pinctrl-2 = <&soc_slppin_gpio>, <&rk817_slppin_pwrdn>;pinctrl-3 = <&soc_slppin_gpio>, <&rk817_slppin_rst>;rockchip,system-power-controller;wakeup-source;#clock-cells = <1>;clock-output-names = "rk808-clkout1", "rk808-clkout2";//fb-inner-reg-idxs = <2>;/* 1: rst regs (default in codes), 0: rst the pmic */pmic-reset-func = <0>;/* not save the PMIC_POWER_EN register in uboot */not-save-power-en = <1>;vcc1-supply = <&vcc3v3_sys>;vcc2-supply = <&vcc3v3_sys>;vcc3-supply = <&vcc3v3_sys>;vcc4-supply = <&vcc3v3_sys>;vcc5-supply = <&vcc3v3_sys>;vcc6-supply = <&vcc3v3_sys>;vcc7-supply = <&vcc3v3_sys>;vcc8-supply = <&vcc3v3_sys>;vcc9-supply = <&vcc3v3_sys>;pwrkey {status = "okay";};pinctrl_rk8xx: pinctrl_rk8xx {gpio-controller;#gpio-cells = <2>;rk817_slppin_null: rk817_slppin_null {pins = "gpio_slp";function = "pin_fun0";};rk817_slppin_slp: rk817_slppin_slp {pins = "gpio_slp";function = "pin_fun1";};rk817_slppin_pwrdn: rk817_slppin_pwrdn {pins = "gpio_slp";function = "pin_fun2";};rk817_slppin_rst: rk817_slppin_rst {pins = "gpio_slp";function = "pin_fun3";};};regulators {vdd_logic: DCDC_REG1 {regulator-always-on;regulator-boot-on;regulator-min-microvolt = <500000>;regulator-max-microvolt = <1350000>;regulator-init-microvolt = <900000>;regulator-ramp-delay = <6001>;regulator-initial-mode = <0x2>;regulator-name = "vdd_logic";regulator-state-mem {regulator-off-in-suspend;};};vdd_gpu: DCDC_REG2 {regulator-always-on;regulator-boot-on;regulator-min-microvolt = <500000>;regulator-max-microvolt = <1350000>;regulator-init-microvolt = <900000>;regulator-ramp-delay = <6001>;regulator-initial-mode = <0x2>;regulator-name = "vdd_gpu";regulator-state-mem {regulator-off-in-suspend;};};vcc_ddr: DCDC_REG3 {regulator-always-on;regulator-boot-on;regulator-initial-mode = <0x2>;regulator-name = "vcc_ddr";regulator-state-mem {regulator-on-in-suspend;};};vdd_npu: DCDC_REG4 {regulator-always-on;regulator-boot-on;regulator-min-microvolt = <500000>;regulator-max-microvolt = <1350000>;regulator-init-microvolt = <900000>;regulator-ramp-delay = <6001>;regulator-initial-mode = <0x2>;regulator-name = "vdd_npu";regulator-state-mem {regulator-off-in-suspend;};};vdda0v9_image: LDO_REG1 {regulator-boot-on;regulator-always-on;regulator-min-microvolt = <900000>;regulator-max-microvolt = <900000>;regulator-name = "vdda0v9_image";regulator-state-mem {regulator-off-in-suspend;};};vdda_0v9: LDO_REG2 {regulator-always-on;regulator-boot-on;regulator-min-microvolt = <900000>;regulator-max-microvolt = <900000>;regulator-name = "vdda_0v9";regulator-state-mem {regulator-off-in-suspend;};};vdda0v9_pmu: LDO_REG3 {regulator-always-on;regulator-boot-on;regulator-min-microvolt = <900000>;regulator-max-microvolt = <900000>;regulator-name = "vdda0v9_pmu";regulator-state-mem {regulator-on-in-suspend;regulator-suspend-microvolt = <900000>;};};vccio_acodec: LDO_REG4 {regulator-always-on;regulator-boot-on;regulator-min-microvolt = <3300000>;regulator-max-microvolt = <3300000>;regulator-name = "vccio_acodec";regulator-state-mem {regulator-off-in-suspend;};};vccio_sd: LDO_REG5 {regulator-always-on;regulator-boot-on;regulator-min-microvolt = <1800000>;regulator-max-microvolt = <3300000>;regulator-name = "vccio_sd";regulator-state-mem {regulator-off-in-suspend;};};vcc3v3_pmu: LDO_REG6 {regulator-always-on;regulator-boot-on;regulator-min-microvolt = <3300000>;regulator-max-microvolt = <3300000>;regulator-name = "vcc3v3_pmu";regulator-state-mem {regulator-on-in-suspend;regulator-suspend-microvolt = <3300000>;};};vcca_1v8: LDO_REG7 {regulator-always-on;regulator-boot-on;regulator-min-microvolt = <1800000>;regulator-max-microvolt = <1800000>;regulator-name = "vcca_1v8";regulator-state-mem {regulator-off-in-suspend;};};vcca1v8_pmu: LDO_REG8 {regulator-always-on;regulator-boot-on;regulator-min-microvolt = <1800000>;regulator-max-microvolt = <1800000>;regulator-name = "vcca1v8_pmu";regulator-state-mem {regulator-on-in-suspend;regulator-suspend-microvolt = <1800000>;};};vcca1v8_image: LDO_REG9 {regulator-always-on;regulator-boot-on;regulator-min-microvolt = <1800000>;regulator-max-microvolt = <1800000>;regulator-name = "vcca1v8_image";regulator-state-mem {regulator-off-in-suspend;};};vcc_1v8: DCDC_REG5 {regulator-always-on;regulator-boot-on;regulator-min-microvolt = <1800000>;regulator-max-microvolt = <1800000>;regulator-name = "vcc_1v8";regulator-state-mem {regulator-off-in-suspend;};};vcc_3v3: SWITCH_REG1 {regulator-always-on;regulator-boot-on;regulator-name = "vcc_3v3";regulator-state-mem {regulator-off-in-suspend;};};vcc3v3_sd: SWITCH_REG2 {regulator-always-on;regulator-boot-on;regulator-name = "vcc3v3_sd";regulator-state-mem {regulator-off-in-suspend;};};};};
};&pmu_io_domains {status = "okay";pmuio2-supply = <&vcc3v3_pmu>;vccio1-supply = <&vccio_acodec>;vccio3-supply = <&vccio_sd>;vccio4-supply = <&vcc_1v8>;vccio5-supply = <&vcc_3v3>;vccio6-supply = <&vcc_1v8>;vccio7-supply = <&vcc_3v3>;
};&pinctrl {pmic {pmic_int: pmic_int {rockchip,pins =<0 RK_PA3 RK_FUNC_GPIO &pcfg_pull_up>;};soc_slppin_gpio: soc_slppin_gpio {rockchip,pins =<0 RK_PA2 RK_FUNC_GPIO &pcfg_output_low_pull_down>;};soc_slppin_slp: soc_slppin_slp {rockchip,pins =<0 RK_PA2 1 &pcfg_pull_up>;};soc_slppin_rst: soc_slppin_rst {rockchip,pins =<0 RK_PA2 2 &pcfg_pull_none>;};};
};

修改 arch/arm/dts/rockchip-pinconf.dtsi，增加一些引脚相关的定义

在这里插入图片描述

以上修改，可以参考 Linux kernel 中开发板设备树获取

验证

经过完善 u-boot 下开发板设备树， rk3568 u-boot gmac 网络功能正常了，也不再依赖 Linux 内核的设备树，不再依赖 resouce 分区，可以单独编译并正常工作了

小结

默认使用 rockchip 提供的 u-boot，通过读取 resouce 分区的Linux 设备树，可以正常的工作，如果想去掉这个依赖，需要 u-boot 关闭 resouce 分区，并且完善 u-boot 下的设备树，当前网络部分无法 ping 通问题主要是缺少 rk809 电源管理 pmic 的配置
通过不断摸搜，虽然没有写什么代码，只是更改了一些配置，让 RK3568 平台的 u-boot 回归到了原有的样子，去除了一些 rockchip 定制化的选项，可能这样做意义不是很大，不过有兴趣的可以尝试，比如自定义分区，不需要定义过多的额外的 resouce 等分区。