Re: DS1307 on NetBSD 9 RPI2 and RPI3

[Jason Thorpe <thorpej%me.com@localhost>]

> On Apr 23, 2020, at 11:57 AM, Brad Spencer <brad%anduin.eldar.org@localhost> wrote:
> 
> Michael van Elst <mlelstv%serpens.de@localhost> writes:
> 
> [snip]
> 
> Thanks...  I still can't get it to work, but the information was
> helpful...
> 
> I have a overlay with this in it:
> 
> /dts-v1/;
> 
> / {
>        compatible = "brcm,bcm2835-i2c";

Your compatible string should match one of the root node's compatible strings, so:

	compatible = "brcm,bcm2835";

(Or "brcm,bcm2836" or "brcm,bcm2837" or whatever.)

...but maybe it doesn't matter because...

> This does prevent the uninteresting i2c buses from attaching and allows
> just the one with the DS1307 on it to be available.  I can see the
> device with i2cscan:
> 
> /dev/iic0: found device at 0x68
> /dev/iic0: 1 devices found
> 
> ofctl
> 00002e30:     /i2c@7e804000
> 00002f28:       /dsrtc@68
> 
> 
> [     1.000003] bsciic0 at simplebus1: Broadcom Serial Controller
> [     1.000003] iic0 at bsciic0: I2C bus
> [     1.000003] dsrtc at iic0 addr 0x68 not configured
> 
> Does not attach...  I know that the kernel has the dsrtc driver compiled
> into it.

What is the EXACT line in your kernel config file where "dsrtc" is declared?

-- thorpej