From: Mark Brown <broonie@kernel.org>
To: Jason Gunthorpe <jgg@nvidia.com>
Cc: Krishna Yarlagadda <kyarlagadda@nvidia.com>,
Jarkko Sakkinen <jarkko@kernel.org>,
"robh+dt@kernel.org" <robh+dt@kernel.org>,
"peterhuewe@gmx.de" <peterhuewe@gmx.de>,
"krzysztof.kozlowski+dt@linaro.org"
<krzysztof.kozlowski+dt@linaro.org>,
"linux-spi@vger.kernel.org" <linux-spi@vger.kernel.org>,
"linux-tegra@vger.kernel.org" <linux-tegra@vger.kernel.org>,
"linux-integrity@vger.kernel.org"
<linux-integrity@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"thierry.reding@gmail.com" <thierry.reding@gmail.com>,
Jonathan Hunter <jonathanh@nvidia.com>,
Sowjanya Komatineni <skomatineni@nvidia.com>,
Laxman Dewangan <ldewangan@nvidia.com>
Subject: Re: [Patch V5 2/3] tpm_tis-spi: Support hardware wait polling
Date: Wed, 1 Mar 2023 13:45:31 +0000 [thread overview]
Message-ID: <Y/9W+7fiRRMqw5LB@sirena.org.uk> (raw)
In-Reply-To: <Y/9VkGjCP48FHtyS@nvidia.com>
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On Wed, Mar 01, 2023 at 09:39:28AM -0400, Jason Gunthorpe wrote:
> On Wed, Mar 01, 2023 at 12:37:27PM +0000, Mark Brown wrote:
> > It's not like these buses are hot pluggable - someone would have to
> > design and manufacture a board which doesn't work. It's probably
> > reasonable for this to fail with the SPI subsystem saying it can't
> > support things when the operation is tried.
> If the spi subsystem fails this request with these flags that would be
> great, it would cause the TPM to fail probing reliably.
> But does this patch do that? It looks like non-supporting half duplex
> drivers will just ignore the new flag?
That's something we can fix up in SPI, we shouldn't worry about it for
the client drivers.
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next prev parent reply other threads:[~2023-03-01 13:45 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-02-27 12:06 [Patch V5 0/3] Tegra TPM driver with HW flow control Krishna Yarlagadda
2023-02-27 12:07 ` [Patch V5 1/3] spi: Add TPM HW flow flag Krishna Yarlagadda
2023-02-27 12:07 ` [Patch V5 2/3] tpm_tis-spi: Support hardware wait polling Krishna Yarlagadda
2023-02-28 2:36 ` Jarkko Sakkinen
2023-02-28 3:32 ` Krishna Yarlagadda
2023-03-01 23:17 ` Jarkko Sakkinen
2023-02-28 12:28 ` Jason Gunthorpe
2023-03-01 11:56 ` Krishna Yarlagadda
2023-03-01 12:27 ` Jason Gunthorpe
2023-03-01 12:37 ` Mark Brown
2023-03-01 13:39 ` Jason Gunthorpe
2023-03-01 13:45 ` Mark Brown [this message]
2023-03-01 14:09 ` Thierry Reding
2023-03-01 15:38 ` Jason Gunthorpe
2023-02-27 12:07 ` [Patch V5 3/3] spi: tegra210-quad: Enable TPM " Krishna Yarlagadda
2023-02-28 2:28 ` [Patch V5 0/3] Tegra TPM driver with HW flow control Jarkko Sakkinen
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