Date: Mon, 9 Jan 2023 20:54:38 -0700 From: John Rushford <jjrushford@gmail.com> To: "freebsd-arm@freebsd.org" <freebsd-arm@FreeBSD.org> Subject: Re: Pi 4 serial ports Message-ID: <3225E237-1F0E-4FA2-92C0-D683B8114F64@gmail.com> In-Reply-To: <C9D9F0D3-7D0A-47DA-9077-433651ECB86E@gmail.com> References: <C9D9F0D3-7D0A-47DA-9077-433651ECB86E@gmail.com>
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This is all new to me and after some digging, I=E2=80=99m currently = trying to put together a rk3328-uart2.dtso that I can compile to an = overlay file so as to enable uart2 John > On Jan 9, 2023, at 1:43 PM, John Rushford <jjrushford@gmail.com> = wrote: >=20 > Greetings, >=20 > I=E2=80=99m running FreeBSD 13.1-RELEASE on a raspberry pi 4b rev 1.4. = The pi 4 has 4 UART ports available but as far as I can tell, FreeBSD = 13.1 only supports 1 of them. > I would like to use one of the other UART ports to wire an adafruit = GPS breakout too. I tried using the UART0 port but when I wire the GPS = breakout to it,=20 > I run into boot issues with u-boot and console logging. I know that = in other OS=E2=80=99s such as raspian or ubuntu, you are able to enable = the additional UARTS in config.txt. > Thinking that FreeBSD might support this I tried adding = =E2=80=9Cdtoverlay=3Duartx=E2=80=9D where x is 0 to 3 but I=E2=80=99m = not seeing in any kernel logging that these ports were enabled and > I don=E2=80=99t see any additional ttyu=E2=80=99s in the dev tree. >=20 > So my question, does FreeBSD support these additional UARTS and if so, = how do I enable them so that I may use one for the GPS breakout? >=20 > Thanks > John
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