From: Wolfram Sang <wsa@kernel.org>
To: Andrew Lunn <andrew@lunn.ch>
Cc: Oleksij Rempel <linux@rempel-privat.de>,
kernel@pengutronix.de, shawnguo@kernel.org,
s.hauer@pengutronix.de, sumit.semwal@linaro.org,
linux-i2c@vger.kernel.org
Subject: Re: IMX I2C driver and DMA mapping errors
Date: Sat, 5 Nov 2022 22:34:43 +0100 [thread overview]
Message-ID: <Y2bW8+FVc9SaXhUI@shikoro> (raw)
In-Reply-To: <Y2bC2WrixK8EwivW@lunn.ch>
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> I think the I2C client API
> does not force you to use DMA friendly memory? It is up to the master
Correct, it does not. A lot of drivers do not support DMA still.
> driver to use a bounce buffer if needed?
Exactly.
> https://docs.kernel.org/i2c/dma-considerations.html
This doc mentions I2C core helpers for simple bounce buffers.
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prev parent reply other threads:[~2022-11-05 21:34 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-11-05 20:08 IMX I2C driver and DMA mapping errors Andrew Lunn
2022-11-05 21:34 ` Wolfram Sang [this message]
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