Re: [RFC] C64 DTS

[Wolfram Sang <wsa@the-dreams.de>]

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Hi Geert,

> 		cpu: cpu {
> 			device_type = "cpu";
> 			compatible = "cbm,6510", "mos,6502";

I don't think mos,6502 will work. You will lose the data port at $00/$01
and can't configure memory then.

> 			clock-frequency = <985000>;

Can't this be derived from some other clock?

> 	sid: sound@d400 {
> 		reg = <0xd400 0x400>;
> 		compatible = "cbm,6581", "cbm,sid";
> 	};

Actually, this file should be a DTSI and VIC, SID, and CIA would need to
be defined in the DTS file. Different C64 models have different versions
of these chips.

> 	iec {
> 		compatible = "cbm,c64-iec-bus";
> 
> 		cbm,atn-gpios = <&cia2 3 GPIO_ACTIVE_LOW>;
> 		cbm,clock-out-gpios = <&cia2 4 GPIO_ACTIVE_LOW>;
> 		cbm,data-out-gpios = <&cia2 5 GPIO_ACTIVE_LOW>;
> 		cbm,clock-in-gpios = <&cia2 6 GPIO_ACTIVE_LOW>;
> 		cbm,data-in-gpios = <&cia2 7 GPIO_ACTIVE_LOW>;
> 	};

The user port has lots of GPIOs, too :D And the tape port...

And you found out that CIA2 uses NMI already. I spotted that, too.

Geez, since when do I have too much time ;)

Happy hacking,

   Wolfram

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