Help with device tree binding for SMC serial

[Rune Torgersen]

> From: Scott Wood [mailto:scottwood at freescale.com] 
> Rune Torgersen wrote:
> >> From: Scott Wood
> >> Don't forget to exclude the SMC parameter RAM from the muram 
> >> data area 
> >> in /soc/cpm/muram/data/reg.  If you have an older device 
> tree binding 
> >> that has no /soc/cpm/muram node, but instead has two resources in 
> >> /soc/cpm/reg, you need to move to head-of-tree to get this to work.
> > 
> > Did that, now we get e checkstop resert. Time to hook up the
> > BDI-2000....
> > Is there a way to have the bootwrapper use the u-boot 
> serial for a while
> > (like a early srial port) for debugging?
> 
> If you mean calling into u-boot for a console, no, there's no 
> code for that.
> 
> What do your cpm and muram nodes look like?

cpm at 119c0 {
	#address-cells = <1>;
	#size-cells = <1>;
	#interrupt-cells = <2>;
	compatible = "fsl,mpc8280-cpm", "fsl,cpm2";
	reg = <119c0 30>;
	ranges;

	muram at 0 {
		#address-cells = <1>;
		#size-cells = <1>;
		ranges = <0 0 10000>;

		data at 0 {
			compatible = "fsl,cpm-muram-data";
			reg = <100 1f00 9800 800>;
		};
	};

	brg at 119f0 {
		compatible = "fsl,mpc8280-brg",
					 "fsl,cpm2-brg",
					 "fsl,cpm-brg";
		reg = <119f0 10 115f0 10>;
	};

	serial at 11a80 {
		device_type = "serial";
		compatible = "fsl,mpc8280-smc-uart",
					 "fsl,cpm2-smc-uart";
		reg = <11a80 10 0 40>;            // <base_address
length parameter_ram_address length>
		interrupts = <4 8>;                 // Interrupt from
table 4.3 of mpc8280rm, interrupt is level or edge
		interrupt-parent = <&PIC>;
		fsl,cpm-brg = <7>;
		fsl,cpm-command = <1d000000>;       // Page and
Sub-block code of the CPCR
	};
};

and chosen node (not sure if needed)
	chosen {
		linux,stdout-path = "/soc/cpm/serial at 11a80";
		bootargs = "console=ttyS0,115200";
	};