linux-kernel - Re: [PATCH v2 5/6] tpm: add driver for cr50 on SPI

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Message-ID: <20190802204131.pcb73zq7gllyy3ul@linux.intel.com>
Date:   Fri, 2 Aug 2019 23:41:42 +0300
From:   Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
To:     Alexander Steffen <Alexander.Steffen@...ineon.com>
Cc:     Stephen Boyd <swboyd@...omium.org>,
        Peter Huewe <peterhuewe@....de>,
        Andrey Pronin <apronin@...omium.org>,
        linux-kernel@...r.kernel.org, Jason Gunthorpe <jgg@...pe.ca>,
        Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-integrity@...r.kernel.org,
        Duncan Laurie <dlaurie@...omium.org>,
        Guenter Roeck <groeck@...omium.org>
Subject: Re: [PATCH v2 5/6] tpm: add driver for cr50 on SPI

On Wed, Jul 17, 2019 at 02:00:06PM +0200, Alexander Steffen wrote:
> Is it a common pattern to add config options that are not useful on their
> own? When would I ever enable TCG_CR50 without also enabling TCG_CR50_SPI?
> Why can't you just use TCG_CR50_SPI for everything?

Agreed. If the kernel only has the spi driver, we only want option for
that.

/Jarkko