linux-kernel - Re: [PATCH 0/2] tpm: add driver for cr50 on SPI

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Date:	Thu, 14 Jul 2016 19:28:55 -0700
From:	Peter Huewe <peterhuewe@....de>
To:	Andrey Pronin <apronin@...omium.org>,
	Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
CC:	Marcel Selhorst <tpmdd@...horst.net>,
	Jason Gunthorpe <jgunthorpe@...idianresearch.com>,
	tpmdd-devel@...ts.sourceforge.net, linux-kernel@...r.kernel.org,
	groeck@...omium.org, smbarber@...omium.org, dianders@...omium.org
Subject: Re: [PATCH 0/2] tpm: add driver for cr50 on SPI



Am 14. Juli 2016 19:20:16 GMT-07:00, schrieb Andrey Pronin <apronin@...omium.org>:
>This patchset adds a TCG TPM2.0 PTP FIFO compliant interface for
>Cr50 chip on SPI.
>
>Depends on the following patches by Andrey Pronin
><apronin@...omium.org>
>that add new members to phy_ops in tpm_tis_core:
> - tpm: support driver-specific sysfs attrs in tpm_tis_core
> - tpm_tis_core: add optional max xfer size check
>
>Andrey Pronin (2):
>  tpm: devicetree: document properties for cr50
>  tpm: add driver for cr50 on SPI
>
> .../devicetree/bindings/security/tpm/cr50_spi.txt  |  30 ++
> drivers/char/tpm/Kconfig                           |   9 +
> drivers/char/tpm/Makefile                          |   1 +
>drivers/char/tpm/cr50_spi.c                        | 409
>+++++++++++++++++++++
> 4 files changed, 449 insertions(+)
>create mode 100644
>Documentation/devicetree/bindings/security/tpm/cr50_spi.txt
> create mode 100644 drivers/char/tpm/cr50_spi.c


Hi, 
can you explain a bit more about this device? And why it needs a special driver and cannot be handled by tpm_tis_spi if its tcg compliant?

Peter
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