linux-kernel - Re: [PATCH 2/2] tpm: add driver for cr50 on SPI

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Message-ID: <20160720170336.GC21460@obsidianresearch.com>
Date:	Wed, 20 Jul 2016 11:03:36 -0600
From:	Jason Gunthorpe <jgunthorpe@...idianresearch.com>
To:	Andrey Pronin <apronin@...omium.org>
Cc:	Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>,
	Peter Huewe <peterhuewe@....de>,
	Marcel Selhorst <tpmdd@...horst.net>,
	tpmdd-devel@...ts.sourceforge.net, linux-kernel@...r.kernel.org,
	groeck@...omium.org, smbarber@...omium.org, dianders@...omium.org,
	Christophe Ricard <christophe.ricard@...il.com>
Subject: Re: [PATCH 2/2] tpm: add driver for cr50 on SPI

On Tue, Jul 19, 2016 at 05:24:11PM -0700, Andrey Pronin wrote:

> The only two things that bother me with such approach are
> (1) whatever names I pick for the new set of functions, they
>     will be similar to and thus might be confused with the
>     original tpm_tis_read/writeXX;

tpm_tis_helper_read16 ?

> (2) these functions are phy-specific, so possibly it's better
>     to create tpm_tis_spi.h and put them there with proper
>     name prefixes. And then use in tpm_tis_spi and cr50_spi.

No, they are generic to any tis phy that implements read only through
read_bytes.

(Honestly, I'm not sure we made the best choice here having phy
 functions for all the versions, we are not that performance
 sensitive, just getting rid of everything but read_bytes from the
 phy_ops would probably also be a reasonable thing to do.)
 
Jason