Date: Sun, 27 Sep 2015 15:08:57 +0300 From: Jukka Ukkonen <jau789@gmail.com> To: sparvu@kronometrix.org Cc: freebsd-arm@FreeBSD.org Subject: Re: RBPI2 ds1307 rtc kernel panic Message-ID: <5607DC59.5050509@gmail.com> In-Reply-To: <5607C63D.2010203@kronometrix.org>
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[-- Attachment #1 --] On 09/27/15 13:34, Stefan Parvu wrote: > > Im seeing kernel panics after I have compiled support for DS1307 RTC > device on RBPI2 hardware: > > panic: sleepq_add: td 0xc395b000 to sleep on wchan 0xc39fa380 with > sleeping prohibited > > The system here: > > iichb0: <BCM2708/2835 BSC controller> mem 0x205000-0x20501f irq 61 on > simplebus0 > iicbus0: <OFW I2C bus> on iichb0 > iic0: <I2C generic I/O> on iicbus0 > iichb1: <BCM2708/2835 BSC controller> mem 0x804000-0x80401f irq 61 on > simplebus0 > iicbus1: <OFW I2C bus> on iichb1 > iic1: <I2C generic I/O> on iicbus1 > ds13070: <Maxim DS1307 RTC> at addr 0xd0 on iicbus1 > > > FreeBSD rpi2 11.0-CURRENT FreeBSD 11.0-CURRENT #0 r288098: Thu Aug 20 > 04:00:38 UTC 2015 root@rpi2:/usr/obj/usr/src/sys/KPI2 arm > > > I have compiled the kernel by Vadim's procedure [1] but modified for > RBPI2: bcm2836.dtsi: https://github.com/vzaigrin/ds1307/issues/1 > > Anyone any ideas why the crash ? > Many thanks > > [1] > https://vzaigrin.wordpress.com/2015/08/04/real-time-clock-on-raspberry-pi-with-freebsd-11/ > Hi Stefan! I have used a different chip (Maxim ds3231), but I guess the process should be much the same for your chip. In my kernel configuration (sys/arm/conf/RPI-B) I have added this line ... device ds3231 in your case this should become device ds1307 In the DTS file (sys/boot/fdt/dts/arm/rpi.dts) I added the attached patch. In your case you should of course change the name of the chip in the DTS to ds1307 as well. The same changes work also for a ds3231 on RPI2. I have successfully equipped both my RPI-B and my PRI2 with the ds3231 chip. For RPI2 the files to modify are - sys/arm/conf/RPI2 and - sys/boot/fdt/dts/arm/rpi2.dts I hope this helps. Cheers, --jau [-- Attachment #2 --] Index: src.head/sys/boot/fdt/dts/arm/rpi.dts =================================================================== --- sys/boot/fdt/dts/arm/rpi.dts (revision 288306) +++ sys/boot/fdt/dts/arm/rpi.dts (working copy) @@ -292,6 +292,17 @@ broadcom,function = "ALT3"; }; }; + + bsc1 { + #address-cells = <0x1>; + #size-cells = <0x0>; + + rtc { + compatible = "maxim,ds3231"; + reg = <0xd0>; + }; + }; + usb { hub { compatible = "usb,hub", "usb,device";home | help
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