Re: [PATCH] powerpc/85xx: clean up FPGA device tree nodes for Freecsale QorIQ boards

On Aug 30, 2011, at 10:01 PM, Tabi Timur-B04825 wrote:

Kumar Gala wrote:

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On Aug 30, 2011, at 9:51 PM, Tabi Timur-B04825 wrote:
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Kumar Gala wrote:

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Do we really want the generic "fsl,fpga-cpld"&   "fsl,fpga-pixis"?  =

This seems to vague.

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Yes, the PIXIS is generally register compatible across all boards.  =

There

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may be some minor differences, but the OCM driver can work with all =

PIXIS

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boards that have an PIXIS.

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Is this true?  Don't we have pixis and ngpixis in u-boot?

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I forgot about that.  Well, everything I said is true about the =

ngpixis,=20

so I guess I should use "ngpixis" instead of just "pixis" here.  I'll =

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to check if the old pixis can be used this way.
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Also you need "pixis" on MPC8544DS, MPC8572DS, MPC8536DS.

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Ok.
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Also fpga-cpld makes no sense if we keep this.  You are either a =

CPLD or FPGA not both.

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Then I don't understand what the CPLD is.

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http://en.wikipedia.org/wiki/Complex_programmable_logic_device

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Ok, I get it now.  Is there a name for the CPLD we use on these chips?=20=

I'm having a hard time getting proper documentation on the CPLD.  York=20=

expressed similar frustration.
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Perhaps these should be called board-control devices.  How about
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	fsl,boardcontrol-cpld
	fsl,boardcontrol-ngpixis
	fsl,boardcontrol-qixis

For the CPLD based boards I think:

<BOARDNAME>-cpld is best as there isn't really much consistent right =
now.

- k=