From mboxrd@z Thu Jan 1 00:00:00 1970 From: Nayna Subject: Re: [tpmdd-devel] [PATCH] Documentation: tpm: Adds the TPM device tree node documentation Date: Wed, 28 Sep 2016 14:14:38 +0530 Message-ID: <57EB82F6.2020100@linux.vnet.ibm.com> References: <1472532277-21933-1-git-send-email-nayna@linux.vnet.ibm.com> <20160902145121.GA9636@rob-hp-laptop> <20160902170613.GA5024@obsidianresearch.com> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20160902170613.GA5024-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org> Sender: devicetree-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Jason Gunthorpe , Rob Herring Cc: mark.rutland-5wv7dgnIgG8@public.gmane.org, devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, pawel.moll-5wv7dgnIgG8@public.gmane.org, ijc+devicetree-KcIKpvwj1kUDXYZnReoRVg@public.gmane.org, wsa-z923LK4zBo2bacvFa/9K2g@public.gmane.org, tpmdd-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org, gcwilson-r/Jw6+rmf7HQT0dZR+AlfA@public.gmane.org, linux-i2c-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, galak-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org List-Id: devicetree@vger.kernel.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