Date: Sat, 27 Feb 2021 11:42:04 -0600 From: Mike Karels <mike@karels.net> To: freebsd-arm@freebsd.org Cc: manu@freebsd.org Subject: Re: cpufreq driver stopped working on RPI4 Message-ID: <202102271742.11RHg4r2012120@mail.karels.net> In-Reply-To: Your message of Sun, 21 Feb 2021 14:43:27 -0600.
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Following up on my previous post (below): I tried the ALPHA1 kernel on a BETA3 system on the RPI4, and it fails to attach the cpufreq driver as well. So it appears that the problem is in the dtb, etc, not the kernel. It would be nice to get this fixed before the 13.0 release. Without the cpufreq driver, the CPU is stuck at a low clock rate. Mike > To: freebsd-arm@freebsd.org > From: Mike Karels <mike@karels.net> > Reply-to: mike@karels.net > Subject: cpufreq driver stopped working on RPI4 > Date: Sun, 21 Feb 2021 14:43:27 -0600 > I upgraded an older (original) RPI4, 4 GB, to 13.0-BETA3, and merged my > previous rc.conf including powerd. Powerd fails to start now, saying > that there is no cpufreq(4) support. Sure enough, dmesg has the followi= ng > relevant lines: > bcm2835_cpufreq0: <CPU Frequency Control> on cpu0 > bcm2835_cpufreq0: Unable to find firmware device > device_attach: bcm2835_cpufreq0 attach returned 6 > armv8crypto0: CPU lacks AES instructionsbcm2835_cpufreq0: <CPU Frequ= ency Control> on cpu0 > bcm2835_cpufreq0: Unable to find firmware device > device_attach: bcm2835_cpufreq0 attach returned 6 > (Yes, armv8crypto is missing a newline.) > I checked the most recent system I had on the shelf, which was 13.0-ALPH= A1. > It has this: > bcm2835_firmware0: <BCM2835 Firmware> on simplebus0 > ofw_clkbus1: <OFW clocks bus> on bcm2835_firmware0 > gpio0: <Raspberry Pi Firmware GPIO controller> on bcm2835_firmware0 > bcm2835_cpufreq0: <CPU Frequency Control> on cpu0 > bcm2835_cpufreq0: ARM 600MHz, Core 200MHz, SDRAM 400MHz, Turbo OFF > Does anyone know what changed to cause this? Was it the FDT update? > Mike
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