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>
[-- Attachment #1: Type: text/plain, Size: 341 bytes --]
> 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.
[-- Attachment #2: signature.asc --]
[-- Type: application/pgp-signature, Size: 833 bytes --]
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]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=Y2bW8+FVc9SaXhUI@shikoro \
--to=wsa@kernel.org \
--cc=andrew@lunn.ch \
--cc=kernel@pengutronix.de \
--cc=linux-i2c@vger.kernel.org \
--cc=linux@rempel-privat.de \
--cc=s.hauer@pengutronix.de \
--cc=shawnguo@kernel.org \
--cc=sumit.semwal@linaro.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.