Date:   Wed, 1 Mar 2023 14:39:30 +0100
From:   Thierry Reding <thierry.reding@gmail.com>
To:     Krishna Yarlagadda <kyarlagadda@nvidia.com>
Cc:     robh+dt@kernel.org, broonie@kernel.org, peterhuewe@gmx.de,
        jgg@ziepe.ca, jarkko@kernel.org, krzysztof.kozlowski+dt@linaro.org,
        linux-spi@vger.kernel.org, linux-tegra@vger.kernel.org,
        linux-integrity@vger.kernel.org, linux-kernel@vger.kernel.org,
        jonathanh@nvidia.com, skomatineni@nvidia.com, ldewangan@nvidia.com
Subject: Re: [Patch V6 3/3] spi: tegra210-quad: Enable TPM wait polling
Message-ID: <Y/9Vkk1ioFWq+XLm@orome>
References: <20230227172108.8206-1-kyarlagadda@nvidia.com>
 <20230227172108.8206-4-kyarlagadda@nvidia.com>
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On Mon, Feb 27, 2023 at 10:51:08PM +0530, Krishna Yarlagadda wrote:
> Trusted Platform Module requires flow control. As defined in TPM
> interface specification, client would drive MISO line at same cycle as
> last address bit on MOSI.
> Tegra241 QSPI controller has TPM wait state detection feature which is
> enabled for TPM client devices reported in SPI device mode bits.
> Set half duplex flag for TPM device to detect and send entire message
> to controller in one shot.
>=20
> Signed-off-by: Krishna Yarlagadda <kyarlagadda@nvidia.com>
> ---
>  drivers/spi/spi-tegra210-quad.c | 14 ++++++++++++++
>  1 file changed, 14 insertions(+)

Acked-by: Thierry Reding <treding@nvidia.com>

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