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mx6cuboxi: Fix Ethernet after DT sync with Linux

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The i.MX6 Cubox-i and HummingBoards can have different PHYs at varying
addresses. U-Boot needs to auto-detect which phy is actually present,
and at which address it is responding.

Auto-detection from multiple phy nodes specified in device-tree does not
currently work correct. As a work-around merge all three possible phys
into one node with the special address 0xffffffff which indicates to the
generic phy driver to probe all addresses.

Signed-off-by: Josua Mayer <josua@solid-run.com>
[fabio: Added the changes to imx6qdl-sr-som-u-boot.dtsi.]
Signed-off-by: Fabio Estevam <festevam@gmail.com>
Tested-by: Christian Gmeiner <cgmeiner@igalia.com>
Tested-by: Christian Gmeiner <cgmeiner@igalia.com>
This commit is contained in:
Josua Mayer 2024-03-30 18:35:55 -03:00 • committed by Fabio Estevam
parent 3952365515
commit 6970f4a6cd
2 changed files with 50 additions and 0 deletions
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1
arch/arm/dts/imx6qdl-hummingboard2-emmc-som-v15-u-boot.dtsi
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@ -1,6 +1,7 @@
// SPDX-License-Identifier: GPL-2.0+
#include "imx6qdl-u-boot.dtsi"
#include "imx6qdl-sr-som-u-boot.dtsi"
/ {
board-detect {

49
arch/arm/dts/imx6qdl-sr-som-u-boot.dtsi Normal file
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@ -0,0 +1,49 @@
// SPDX-License-Identifier: (GPL-2.0 OR MIT)
#include <dt-bindings/gpio/gpio.h>
&fec {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_microsom_enet_ar8035>;
phy-handle = <&phy>;
phy-mode = "rgmii-id";
/*
* The PHY seems to require a long-enough reset duration to avoid
* some rare issues where the PHY gets stuck in an inconsistent and
* non-functional state at boot-up. 10ms proved to be fine .
*/
phy-reset-duration = <10>;
phy-reset-gpios = <&gpio4 15 GPIO_ACTIVE_LOW>;
status = "okay";
mdio {
#address-cells = <1>;
#size-cells = <0>;
ethernet-phy@0 {
status = "disabled";
};
ethernet-phy@1 {
status = "disabled";
};
ethernet-phy@4 {
status = "disabled";
};
phy: ethernet-phy@ffffffff {
/*
* The PHY can appear either:
* - AR8035: at address 0 or 4
* - ADIN1300: at address 1
* Actual address being detected at runtime.
*/
reg = <0xffffffff>;
qca,clk-out-frequency = <125000000>;
qca,smarteee-tw-us-1g = <24>;
adi,phy-output-clock = "125mhz-free-running";
};
};
};