[RFC] SoC name and revision in /proc/cpuinfo

[RFC] SoC name and revision in /proc/cpuinfo

[Jean-Christophe PLAGNIOL-VILLARD]

Hi Russell,

	On AT91 for some userland library we need to known the cpu model and revision
	so I'd like to known if it's ok with you to extend it?

	as
	cpu familly:	at91
	cpu type:	at91sam9g20
	cpu revision:	1.1

Best Regards,
J.

[RFC] SoC name and revision in /proc/cpuinfo

[Russell King - ARM Linux]

On Fri, Sep 24, 2010 at 03:53:56PM +0200, Jean-Christophe PLAGNIOL-VILLARD wrote:
> Hi Russell,
> 
> 	On AT91 for some userland library we need to known the cpu model and revision
> 	so I'd like to known if it's ok with you to extend it?
> 
> 	as
> 	cpu familly:	at91
> 	cpu type:	at91sam9g20
> 	cpu revision:	1.1

You're mixing up the CPU with the SoC.  The CPU is what's in the core of
the SoC and has no peripherals etc.  The SoC is the entire chip.  "Central
Processing Unit."  "System on a Chip."

I'd much rather see SoC information kept separate from the CPU information.

[RFC] SoC name and revision in /proc/cpuinfo

[Jean-Christophe PLAGNIOL-VILLARD]

On 15:06 Fri 24 Sep     , Russell King - ARM Linux wrote:
> On Fri, Sep 24, 2010 at 03:53:56PM +0200, Jean-Christophe PLAGNIOL-VILLARD wrote:
> > Hi Russell,
> > 
> > 	On AT91 for some userland library we need to known the cpu model and revision
> > 	so I'd like to known if it's ok with you to extend it?
> > 
> > 	as
> > 	cpu familly:	at91
> > 	cpu type:	at91sam9g20
> > 	cpu revision:	1.1
> 
> You're mixing up the CPU with the SoC.  The CPU is what's in the core of
> the SoC and has no peripherals etc.  The SoC is the entire chip.  "Central
> Processing Unit."  "System on a Chip."
> 
> I'd much rather see SoC information kept separate from the CPU information.
I knwon the diff between cpu and soc but today others arch do this the same way
via cpuinfo as example sh or others.

So what do you propose?

is this better

soc familly:	at91
soc type:	at91am9g20
soc revision:	1.1

or you will prefer we create a new entry like sysinfo?

because today we store the hardware name, revision abd serial in cpuinfo
also

Best Regards,
J.

[RFC] SoC name and revision in /proc/cpuinfo

[Bryan Huntsman]

On 09/24/2010 07:42 AM, Jean-Christophe PLAGNIOL-VILLARD wrote:
> I knwon the diff between cpu and soc but today others arch do this the same way
> via cpuinfo as example sh or others.
> 
> So what do you propose?
> 
> is this better
> 
> soc familly:	at91
> soc type:	at91am9g20
> soc revision:	1.1
> 
> or you will prefer we create a new entry like sysinfo?
> 
> because today we store the hardware name, revision abd serial in cpuinfo
> also
> 
> Best Regards,
> J.

How about something like /sys/devices/system/soc/soc0/[family|type|revision]?  We're doing something similar and using this location on MSM chips.

- Bryan

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