[U-Boot] [PATCH v4 25/32] tpm: add support for TPMv2.x SPI modules

[Miquel Raynal <miquel.raynal@bootlin.com>]

Hi Simon,

On Wed, 16 May 2018 02:04:58 +1000, Simon Glass <sjg@chromium.org>
wrote:

> Hi Miquel,
> 
> On 15 May 2018 at 19:57, Miquel Raynal <miquel.raynal@bootlin.com> wrote:
> > Add the tpm2_tis_spi driver that should support any TPMv2 compliant
> > (SPI) module.
> >
> > Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
> > ---
> >  drivers/tpm/Kconfig        |  10 +
> >  drivers/tpm/Makefile       |   2 +
> >  drivers/tpm/tpm2_tis_spi.c | 664 +++++++++++++++++++++++++++++++++++++++++++++
> >  3 files changed, 676 insertions(+)
> >  create mode 100644 drivers/tpm/tpm2_tis_spi.c
> >  
> 
> Is there a change log for this patch?

Yes there is one in the cover letter but your are right it was not
clear enough what file I was talking about:

<snip>
> * Removed useless reset of rx_buf[0] in tpm_tis_spi_xfer().
> * Changed the way spi_xfer return code is checked: error out on any
>   value != 0 instead of just negative ones.
> * Removed unused functions flagged __maybe_unused as well as well as the
>   __maybe_unused flags themselves when not needed.
> * Simplified the validity check of the GPIO as suggested.
> * Updated the compatible property for the SPI modules (as well as the
>   bindings docuementation) to be simply "tis,tpm2-spi" which should work
>   with most compliant chips. Data is linked to this generic compatible
>   in the TPM driver, other values may be added if needed in the future
>   to fit other chips that would use different values than the current
>   ones (used by Infineon SLB 9670 and ST ST33TPHF20 modules, for
>   instance).  
</snip>

Regards,
Miquèl

-- 
Miquel Raynal, Bootlin (formerly Free Electrons)
Embedded Linux and Kernel engineering
https://bootlin.com