Date: Wed, 13 Jul 2022 06:54:45 +0300 From: Nick Kostyria <nick@i11.co> To: Mark Millard <marklmi@yahoo.com> Cc: freebsd-arm <freebsd-arm@freebsd.org> Subject: Re: path for overlays Message-ID: <20220713035445.3a22da0d@thinkbook> In-Reply-To: <B7117A0D-68E8-4300-ADCD-9F8CA4F613C0@yahoo.com> References: <B7117A0D-68E8-4300-ADCD-9F8CA4F613C0.ref@yahoo.com> <B7117A0D-68E8-4300-ADCD-9F8CA4F613C0@yahoo.com>
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On Mon, 11 Jul 2022 22:16:44 -0700 Mark Millard <marklmi@yahoo.com> wrote: > Nick Kostyria <nick_at_i11.co> wrote on > Date: Tue, 12 Jul 2022 03:27:25 UTC : > > > On Mon, 11 Jul 2022 00:18:59 -0300 > > "Dr. Rolf Jansen" <freebsd-rj@cyclaero.com> wrote: > > > > > > > > > > Anyway, for enabling I2C5 (we may choose from I2C3, I2C4, I2C5 and I2C6) on a Raspberry Pi 4, we do: > > > > > > # fetch https://github.com/raspberrypi/linux/blob/rpi-5.15.y/arch/arm/boot/dts/overlays/i2c5-overlay.dts > > > # dtc -I dts -O dtb -b0 -@ -o /boot/msdos/overlays/i2c5.dtbo i2c5-overlay.dts > > > > > > Then we add the following 2 lines to /boot/msdos/config.txt: > > > > > > gpio=12,13=a5 > > > dtoverlay=i2c5,pins_12_13 > > > > > > > Hello. > > > > I see you use /boot/msdos/overlays/ for overlays. > > I have a question for a long time and I can't find an answer. > > > > What is the difference between /boot/msdos/overlays/ and /boot/dtb/overlays/ (fdt_overlays in /boot/loader.conf). > > [I've written these notes to presume a RPi* context based on > U-Boot, not EDK2 UEFI/ACPI or the like, and not for other > platforms.] 's Thank you very much for the clarification.
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