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From: Mark Brown <broonie@kernel.org>
To: Luhua Xu <luhua.xu@mediatek.com>
Cc: Kate Stewart <kstewart@linuxfoundation.org>,
	Leilk Liu <leilk.liu@mediatek.com>,
	linux-kernel@vger.kernel.org, linux-spi@vger.kernel.org,
	linux-mediatek@lists.infradead.org,
	linux-arm-kernel@lists.infradead.org,
	Matthias Brugger <matthias.bgg@gmail.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	Enrico Weigelt <info@metux.net>,
	Allison Randal <allison@lohutok.net>
Subject: Re: [PATCH 2/2] spi: mediatek: add cs timing configuration support
Date: Tue, 19 Nov 2019 18:19:30 +0000	[thread overview]
Message-ID: <20191119181930.GF3634@sirena.org.uk> (raw)
In-Reply-To: <1574053037-26721-3-git-send-email-luhua.xu@mediatek.com>


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On Mon, Nov 18, 2019 at 12:57:17PM +0800, Luhua Xu wrote:
> Add configure SPI CS setup/hold/idle delays in terms
> of clk count support, and use one period of current
> spi speed as default if setup/hold/idle not indicated.

We have added a generic way to specify delays like this via the
set_cs_timing() operation and related fields in the spi_device struct
which operate in terms of spi_delay - Alexandru Ardelean added them
recently.  This supports both times and clock cycles as units so should
fit with what your hardware can do, the interface is new though so there
may be soem rough edges to worry about.

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  reply	other threads:[~2019-11-19 18:19 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-11-18  4:57 [PATCH 0/2] spi CS customization support Luhua Xu
2019-11-18  4:57 ` [PATCH 1/2] spi: mediatek: add SPI_CS_HIGH support Luhua Xu
2019-11-18 17:49   ` Applied "spi: mediatek: add SPI_CS_HIGH support" to the spi tree Mark Brown
2019-11-18  4:57 ` [PATCH 2/2] spi: mediatek: add cs timing configuration support Luhua Xu
2019-11-19 18:19   ` Mark Brown [this message]
2019-11-20  9:31     ` luhua xu

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