Re: [tpmdd-devel] [PATCH] Documentation: tpm: Adds the TPM device tree node documentation

[Nayna <nayna-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8@public.gmane.org>]

On 09/02/2016 10:36 PM, Jason Gunthorpe wrote:
> On Fri, Sep 02, 2016 at 09:51:21AM -0500, Rob Herring wrote:
>>> +- linux,sml-base : base address of the Event Log. It is a physical address.
>>> +		   sml stands for shared memory log.
>>
>> How is it a physical address on an i2c device? Why 2 cells (which needs
>> to be documented also)?
>
> To be clear, as I understand it, this mechanism is a hand off from the
> boot firmware to Linux.
>
> The boot firmware talks i2c to the device, does some stuff, writes it
> to memory and then linux reads that stuff. I agree it seems crazy to
> include a random physical address like that.
>
> The linux,sml-* names appear to have been used by IBM for a long time
> on their enterprise PPC platforms (see drivers/char/tpm/tpm_of.c), so
> I've expected we have to keep them?
>
> I asked Nayna to document this stuff IBM is doing so the rest of us
> in TPM land can have a hope of maintaining it...

Thanks Jason !!

In my v2 version for device tree documentation, I have posted the 
documentation for both vtpm and physical TPM.

>
> Jason
>

--
To unsubscribe from this list: send the line "unsubscribe devicetree" in
the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html