Resolved! Linux 5.10 pinctrl driver fails to configure GPIO port Z pad 7 with AF7 (USART1_TX)
I have the following pinctrl entry in my 5.10 device tree to use the USART1 and the serial port fails, due to an incorrect pin configuration for PZ7 AF7.usart1_pins_c: usart1-2 { pins1 { pinmux = <STM32_PINMUX(...