005231128e
Let the PHY generate the RX and TX delay on the Odroid-C1 and MXIII
Plus.
Previously we did not know that these boards used an RX delay. We
assumed that setting the TX delay on the MAC side It turns out that
these boards also require an RX delay of 2ns (verified on Odroid-C1,
but the u-boot code uses the same setup on both boards). Ethernet only
worked because u-boot added this RX delay on the MAC side.
The 4ns TX delay was also wrong and the result of using an unsupported
RGMII TX clock divider setting. This has been fixed in the driver with
commit bd6f48546b9cb7 ("net: stmmac: dwmac-meson8b: Fix the RGMII TX
delay on Meson8b/8m2 SoCs").
Switch to phy-mode "rgmii-id" to let the PHY side handle all the delays,
(as recommended by the Ethernet maintainers anyways) to correctly
describe the need for a 2ns RX as well as 2ns TX delay on these boards.
This fixes the Ethernet performance on Odroid-C1 where there was a huge
amount of packet loss when transmitting data due to the incorrect TX
delay.
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>
Link: https://lore.kernel.org/r/20200512215148.540322-3-martin.blumenstingl@googlemail.com
253 lines
4.5 KiB
Plaintext
253 lines
4.5 KiB
Plaintext
// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
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/*
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* Copyright (c) 2018 Oleg Ivanov <balbes-150@yandex.ru>
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* Copyright (c) 2018 Martin Blumenstingl <martin.blumenstingl@googlemail.com>
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*/
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/dts-v1/;
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#include "meson8m2.dtsi"
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#include <dt-bindings/gpio/gpio.h>
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#include <dt-bindings/input/input.h>
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/ {
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model = "Tronsmart MXIII Plus";
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compatible = "tronsmart,mxiii-plus", "amlogic,meson8m2";
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aliases {
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ethernet0 = ðmac;
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i2c0 = &i2c_AO;
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serial0 = &uart_AO;
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serial1 = &uart_A;
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mmc0 = &sd_card_slot;
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};
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chosen {
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stdout-path = "serial0:115200n8";
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};
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memory {
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device_type = "memory";
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reg = <0x40000000 0x80000000>;
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};
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adc-keys {
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compatible = "adc-keys";
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io-channels = <&saradc 0>;
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io-channel-names = "buttons";
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keyup-threshold-microvolt = <1710000>;
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button-function {
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label = "Function";
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linux,code = <KEY_FN>;
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press-threshold-microvolt = <10000>;
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};
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};
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iio-hwmon {
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compatible = "iio-hwmon";
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io-channels = <&saradc 8>;
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};
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vcc_3v3: regulator-vcc3v3 {
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compatible = "regulator-fixed";
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regulator-name = "VCC3V3";
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regulator-min-microvolt = <3300000>;
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regulator-max-microvolt = <3300000>;
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};
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};
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&cpu0 {
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cpu-supply = <&vcck>;
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};
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ðmac {
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status = "okay";
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pinctrl-0 = <ð_rgmii_pins>;
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pinctrl-names = "default";
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phy-handle = <ð_phy0>;
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phy-mode = "rgmii-id";
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mdio {
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compatible = "snps,dwmac-mdio";
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#address-cells = <1>;
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#size-cells = <0>;
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eth_phy0: ethernet-phy@0 {
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/* Realtek RTL8211F (0x001cc916) */
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reg = <0>;
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reset-assert-us = <10000>;
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reset-deassert-us = <30000>;
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reset-gpios = <&gpio GPIOH_4 GPIO_ACTIVE_LOW>;
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};
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};
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};
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&ir_receiver {
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status = "okay";
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pinctrl-0 = <&ir_recv_pins>;
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pinctrl-names = "default";
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};
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&i2c_AO {
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status = "okay";
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pinctrl-0 = <&i2c_ao_pins>;
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pinctrl-names = "default";
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pmic@32 {
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compatible = "ricoh,rn5t618";
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reg = <0x32>;
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system-power-controller;
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regulators {
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vcck: DCDC1 {
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regulator-name = "VCCK";
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regulator-min-microvolt = <825000>;
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regulator-max-microvolt = <1150000>;
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regulator-boot-on;
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regulator-always-on;
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};
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vddee: DCDC2 {
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/* the output is also used as VDDAO */
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regulator-name = "VDD_EE";
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regulator-min-microvolt = <950000>;
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regulator-max-microvolt = <1150000>;
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regulator-boot-on;
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regulator-always-on;
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};
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DCDC3 {
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regulator-name = "VDD_DDR";
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regulator-min-microvolt = <1500000>;
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regulator-max-microvolt = <1500000>;
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regulator-boot-on;
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regulator-always-on;
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};
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LDO1 {
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regulator-name = "VDDIO_AO28";
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regulator-min-microvolt = <2900000>;
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regulator-max-microvolt = <2900000>;
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regulator-boot-on;
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regulator-always-on;
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};
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vddio_ao1v8: LDO2 {
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regulator-name = "VDDIO_AO18";
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regulator-min-microvolt = <1800000>;
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regulator-max-microvolt = <1800000>;
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regulator-boot-on;
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regulator-always-on;
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};
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LDO3 {
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regulator-name = "VCC1V8";
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regulator-min-microvolt = <1800000>;
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regulator-max-microvolt = <1800000>;
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regulator-boot-on;
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regulator-always-on;
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};
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LDO4 {
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regulator-name = "VCC2V8";
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regulator-min-microvolt = <2850000>;
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regulator-max-microvolt = <2850000>;
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regulator-boot-on;
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regulator-always-on;
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};
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LDO5 {
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regulator-name = "AVDD1V8";
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regulator-min-microvolt = <1800000>;
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regulator-max-microvolt = <1800000>;
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regulator-boot-on;
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regulator-always-on;
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};
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LDORTC1 {
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regulator-name = "VDD_LDO";
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regulator-min-microvolt = <2700000>;
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regulator-max-microvolt = <2700000>;
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regulator-boot-on;
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regulator-always-on;
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};
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LDORTC2 {
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regulator-name = "RTC_0V9";
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regulator-min-microvolt = <900000>;
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regulator-max-microvolt = <900000>;
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regulator-boot-on;
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regulator-always-on;
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};
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};
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};
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};
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&mali {
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mali-supply = <&vddee>;
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};
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&saradc {
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status = "okay";
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vref-supply = <&vddio_ao1v8>;
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};
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&sdio {
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status = "okay";
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pinctrl-0 = <&sd_b_pins>;
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pinctrl-names = "default";
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/* SD card */
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sd_card_slot: slot@1 {
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compatible = "mmc-slot";
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reg = <1>;
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status = "okay";
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bus-width = <4>;
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no-sdio;
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cap-mmc-highspeed;
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cap-sd-highspeed;
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disable-wp;
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cd-gpios = <&gpio CARD_6 GPIO_ACTIVE_LOW>;
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vmmc-supply = <&vcc_3v3>;
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};
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};
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/* connected to the Bluetooth module */
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&uart_A {
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status = "okay";
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pinctrl-0 = <&uart_a1_pins>, <&uart_a1_cts_rts_pins>;
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pinctrl-names = "default";
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uart-has-rtscts;
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};
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&uart_AO {
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status = "okay";
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pinctrl-0 = <&uart_ao_a_pins>;
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pinctrl-names = "default";
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};
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&usb0 {
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status = "okay";
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};
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&usb1 {
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status = "okay";
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};
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&usb0_phy {
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status = "okay";
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};
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&usb1_phy {
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status = "okay";
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};
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