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Hermes SMTP Server) with ESMTPA ID 7315653d39ee2bab446cf115d8426040; Tue, 10 Jan 2023 04:49:22 +0000 (UTC) Content-Type: text/plain; charset=utf-8 List-Id: Porting FreeBSD to ARM processors List-Archive: https://lists.freebsd.org/archives/freebsd-arm List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-arm@freebsd.org Mime-Version: 1.0 (Mac OS X Mail 16.0 \(3731.300.101.1.3\)) Subject: Re: Pi 4 serial ports From: Mark Millard In-Reply-To: <3225E237-1F0E-4FA2-92C0-D683B8114F64@gmail.com> Date: Mon, 9 Jan 2023 20:49:10 -0800 Cc: "freebsd-arm@freebsd.org" Content-Transfer-Encoding: quoted-printable Message-Id: References: <3225E237-1F0E-4FA2-92C0-D683B8114F64@gmail.com> To: John Rushford X-Mailer: Apple Mail (2.3731.300.101.1.3) X-Rspamd-Queue-Id: 4NrddP2zV2z3w09 X-Spamd-Bar: ---- X-Spamd-Result: default: False [-4.00 / 15.00]; REPLY(-4.00)[]; ASN(0.00)[asn:36647, ipnet:98.137.64.0/20, country:US] X-Rspamd-Pre-Result: action=no action; module=replies; Message is reply to one we originated X-ThisMailContainsUnwantedMimeParts: N On Jan 9, 2023, at 19:54, John Rushford 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 = 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