On 07.09.2026 17:43, Thomas Kupper wrote:
Hi,
I'm trying to get uart1 on a Pi 5 working on -current.
According to pinout.xyz/pinout/uart Pi 5 supports four additional UARTs
(uart1 to uart4) and I enabled uart1 using the mentioned overlay
directive 'dtoverlay=uart1-pi5'.
It does work in Linux which makes me assume my config.txt is ok as such.
The uarts are part of the SOC and PL011 based. I see there is support
for it in OpenBSD but can't get it to work.
Correction, it's part of the RP1 south bridge on the RPi5, not the SoC
[1] [2].
[1]
https://www.raspberrypi.com/documentation/computers/io-controllers.html#rp1-overview
[2] https://pip.raspberrypi.com/categories/892-raspberry-pi-5/,
rp1-peripherals.pdf
Would someone know if the additional uarts on a Pi 5 are supported?
Cheers
Thomas
