From: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
To: Stephen Boyd <swboyd@chromium.org>, Peter Huewe <peterhuewe@gmx.de>
Cc: Andrey Pronin <apronin@chromium.org>,
linux-kernel@vger.kernel.org, linux-integrity@vger.kernel.org,
Duncan Laurie <dlaurie@chromium.org>,
Jason Gunthorpe <jgg@ziepe.ca>, Arnd Bergmann <arnd@arndb.de>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Guenter Roeck <groeck@chromium.org>,
Alexander Steffen <Alexander.Steffen@infineon.com>
Subject: Re: [PATCH v3 4/4] tpm: add driver for cr50 on SPI
Date: Fri, 09 Aug 2019 23:31:04 +0300 [thread overview]
Message-ID: <e7951cb251116e903cf0040ee6f271dc4e68ff2e.camel@linux.intel.com> (raw)
In-Reply-To: <20190806220750.86597-5-swboyd@chromium.org>
On Tue, 2019-08-06 at 15:07 -0700, Stephen Boyd wrote:
> From: Andrey Pronin <apronin@chromium.org>
>
> Add TPM2.0 PTP FIFO compatible SPI interface for chips with Cr50
> firmware. The firmware running on the currently supported H1
> Secure Microcontroller requires a special driver to handle its
> specifics:
>
> - need to ensure a certain delay between spi transactions, or else
> the chip may miss some part of the next transaction;
> - if there is no spi activity for some time, it may go to sleep,
> and needs to be waken up before sending further commands;
> - access to vendor-specific registers.
Which Chromebook models have this chip?
If I had an access to one, how do I do kernel testing with it i.e.
how do I get it to boot initramfs and bzImage from a USB stick?
/Jarkko
next prev parent reply other threads:[~2019-08-09 20:31 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-06 22:07 [PATCH v3 0/4] tpm: Add driver for cr50 Stephen Boyd
2019-08-06 22:07 ` [PATCH v3 1/4] tpm: Add a flag to indicate TPM power is managed by firmware Stephen Boyd
2019-08-09 18:02 ` Jarkko Sakkinen
2019-08-12 14:11 ` Stephen Boyd
2019-08-06 22:07 ` [PATCH v3 2/4] tpm: tpm_tis_spi: Export functionality to other drivers Stephen Boyd
2019-08-09 20:28 ` Jarkko Sakkinen
2019-08-12 14:16 ` Stephen Boyd
2019-08-06 22:07 ` [PATCH v3 3/4] dt-bindings: tpm: document properties for cr50 Stephen Boyd
2019-08-06 22:07 ` [PATCH v3 4/4] tpm: add driver for cr50 on SPI Stephen Boyd
2019-08-09 20:31 ` Jarkko Sakkinen [this message]
2019-08-12 20:46 ` Stephen Boyd
2019-08-15 13:00 ` Jarkko Sakkinen
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