Date: Mon, 9 Jan 2023 20:49:10 -0800 From: Mark Millard <marklmi@yahoo.com> To: John Rushford <jjrushford@gmail.com> Cc: "freebsd-arm@freebsd.org" <freebsd-arm@FreeBSD.org> Subject: Re: Pi 4 serial ports Message-ID: <F0D11774-CB36-448C-B69C-9F8875029FDD@yahoo.com> In-Reply-To: <3225E237-1F0E-4FA2-92C0-D683B8114F64@gmail.com> References: <C9D9F0D3-7D0A-47DA-9077-433651ECB86E@gmail.com> <3225E237-1F0E-4FA2-92C0-D683B8114F64@gmail.com>
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On Jan 9, 2023, at 19:54, John Rushford <jjrushford@gmail.com> wrote: > 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 I'm confused. A rk3328 is a rockchip part not involved in/for RPi*'s (broadcom parts). Examples of .dtb files for products using the rk3328 parts are: /boot/efi/dtb/rockchip/rk3328-rock64.dtb /boot/efi/dtb/rockchip/rk3328-nanopi-r2s.dtb /boot/efi/dtb/rockchip/rk3328-rock-pi-e.dtb .dtbo files for a rk3328 are not usable for RPi*'s generally (ever?). Are you now using a rk3328 based part instead of a RPi* ? > John >=20 >> 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 =3D=3D=3D Mark Millard marklmi at yahoo.com
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