linux-kernel - Re: [PATCH 1/2] tpm: devicetree: document properties for cr50

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Message-ID: <CABXOdTeFcE3L_0vO+DKpQpUdoNMG=z6b34rs+tWWF6KgYtcY0A@mail.gmail.com>
Date:	Fri, 15 Jul 2016 11:28:31 -0700
From:	Guenter Roeck <groeck@...gle.com>
To:	Andrey Pronin <apronin@...omium.org>
Cc:	Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>,
	Peter Huewe <peterhuewe@....de>,
	Marcel Selhorst <tpmdd@...horst.net>,
	Jason Gunthorpe <jgunthorpe@...idianresearch.com>,
	tpmdd-devel@...ts.sourceforge.net,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Guenter Roeck <groeck@...omium.org>, smbarber@...omium.org,
	Douglas Anderson <dianders@...omium.org>,
	devicetree@...r.kernel.org, Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>
Subject: Re: [PATCH 1/2] tpm: devicetree: document properties for cr50

On Fri, Jul 15, 2016 at 10:31 AM, Andrey Pronin <apronin@...omium.org> wrote:
> On Thu, Jul 14, 2016 at 09:05:53PM -0700, Guenter Roeck wrote:
>> On Thu, Jul 14, 2016 at 7:20 PM, Andrey Pronin <apronin@...omium.org> wrote:
>> > +
>> > +Required properties:
>> > +- compatible: Should be "google,cr50_spi".
>>
>> google,cr50, maybe ? The "_spi" seems redundant.
>>
>
> I believe "_spi" is warranted. It's the driver that handles the SPI
> interface for Cr50 specifically.
> But if the same firmware ever talks through a different interface (say,
> I2C), this driver will not be compatible.
>
I meant in the context of it being attached to a spi device, which
implies that it is connected through a spi bus.

Guenter

>> Also, I agree with comments from others - the term cr50 really needs
>> an explanation (Google thinks that it is a motor bike, a scanner, or a
>> coffee roaster).
>>
>
> Yes, will add a better description of what it is. My original one was
> too brief and imprecise at the same time.
>