8 Sep
2025
8 Sep
'25
5:48 p.m.
On Mon, Sep 08, 2025 at 06:54:15PM +0200, Andrew Lunn wrote:
On Mon, Sep 08, 2025 at 01:37:19PM +0200, Christian Marangi wrote:
With further testing with an attached Aeonsemi it was discovered that the pinctrl MDIO function applied the wrong bitmask. The error was probably caused by the confusing documentation related to these bits.
Inspecting what the bootloader actually configure, the SGMII_MDIO_MODE is never actually set but instead it's set force enable to the 2 GPIO (gpio 1-2) for MDC and MDIO pin.
Is the MDIO bus implemented using the GPIO bitbanging driver?
No it does use the MDIO bus integrated in the MT7530 Switch. It's just that the MDIO pin can be muxed as GPIO usage.
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Ansuel