From owner-freebsd-arm@freebsd.org  Fri Jun 26 08:19:14 2015
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Date: Fri, 26 Jun 2015 11:19:04 +0300
From: Jukka Ukkonen <jau789@gmail.com>
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Subject: RPI2 and DS3231
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Hello everybody,

Has anyone got a DS3231 RTC working with RPI2 yet.
The ds3231 driver has been added to the kernel config.
When I changed the DTS extension to this...

                bscl {
                        #address-cells = <1>;
                        #size-cells = <0>;

                        rtc {
  				compatible = "maxim,ds3231";
                                reg = <0xd0>;
                        };
                };

there are no longer complaints from dtc, but still
the boot hangs after the network has been brought up.

The settings for #address-cells and #size-cells were
lifted from a Linux example which also set "reg = <0x68>;".
Setting reg as in the Linux example to 0x68 did not help.
The boot still hangs.

Oh yes, the latest OS version I have tested with is head
svn r284866.

What should I try next? Any ideas anyone?

--jau