Date: Fri, 12 Feb 2021 19:02:03 -0700 From: Elwood Downey <elwood.downey@gmail.com> To: freebsd-arm@freebsd.org Subject: iic Message-ID: <CAL98DL5mAreMfwQRDVo11nT5j3=fGpm=4Jno5q8uDx7P9NQ4Ww@mail.gmail.com>
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Hello all! Trying IIC on RPi 4b 4GB, no joy yet. Looking for ideas. So far: - bus seems to be present based on dmesg and /dev/iic0 (see below) - device is BME280 <https://www.adafruit.com/product/2652>; env sensor at IIC address 0x77. - wiki page here <https://wiki.freebsd.org/arm/Raspberry%20Pi>; suggests it should work. - The table says "OK (brcm BSC)" but not sure what that extra bit means. - Tried all the kernels mentioned on that page with no luck so decided on some 13-BETAs, still no luck. - Device is known to work on the same hardware running Raspbian 10 "buster". - tried the I2CRDWR-only test program here <https://vzaigrin.wordpress.com/2014/04/28/working-with-i2c-in-freebsd-on-raspberry-pi/>; but that does not find my device either Suggestions welcome! adTHANKSvance Elwood Downey Tucson AZ freebsd@generic:~ % dmesg | grep iic iichb0: <BCM2708/2835 BSC controller> mem 0x7e804000-0x7e804fff irq 26 on simplebus0 iicbus0: <OFW I2C bus> on iichb0 iic0: <I2C generic I/O> on iicbus0 freebsd@generic:~ % uname -a FreeBSD generic 13.0-BETA2 FreeBSD 13.0-BETA2 #0 releng/13.0-n244498-6461715f1ae: Fri Feb 12 06:21:00 UTC 2021 root@releng1.nyi.freebsd.org:/usr/obj/usr/src/arm64.aarch64/sys/GENERIC arm64 freebsd@generic:~ % ls -l /dev/iic0 crw------- 1 root wheel 0x45 Feb 12 07:01 /dev/iic0 freebsd@generic:~ % sudo i2c -s Hardware may not support START/STOP scanning; trying less-reliable read method. Scanning I2C devices on /dev/iic0: <none found>
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