From: David Lechner <dlechner@baylibre.com>
To: Jonathan Santos <Jonathan.Santos@analog.com>,
linux-spi@vger.kernel.org, linux-kernel@vger.kernel.org
Cc: nuno.sa@analog.com, michael.hennerich@analog.com,
broonie@kernel.org, jonath4nns@gmail.com,
marcelo.schmitt1@gmail.com, andriy.shevchenko@intel.com
Subject: Re: [PATCH v3 1/6] dt-bindings: iio: adc: ad7768-1: Document multidevice support
Date: Tue, 18 Aug 2026 10:02:50 -0500 [thread overview]
Message-ID: <9841fd2e-434f-48f3-90c1-d62718d6d4d2@baylibre.com> (raw)
In-Reply-To: <d19a27738ac13307191dd09cd4a3ac5df7f7ba32.1786973376.git.Jonathan.Santos@analog.com>
On 8/17/26 6:32 PM, Jonathan Santos wrote:
> The AD7768-1 family supports aggregating up to four devices on a single
> SPI controller, with each device occupying a dedicated CS line and a
> single data lane.
>
> Extend the `reg` property to accept up to 4 entries (one per device).
>
> Add `spi-rx-bus-width` property to declare the per-device lane count.
> Since each lane is bound to one CS, the number of entries must match
> `reg`. Make it required when `reg` has more than one entry.
>
I don't see why we should have to require the spi-rx-bus-width property.
It seems logical that if it is not present, then we would assume one
lane per CS. This is already how bindings work.
For example, adi,ad4080 and ge,achc have multiple CS lines and don't
require any bus width properties.
next prev parent reply other threads:[~2026-08-18 15:02 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-17 23:32 [PATCH v3 0/6] spi: add multi-CS and multi-chip aggregation support Jonathan Santos
2026-08-17 23:32 ` [PATCH v3 1/6] dt-bindings: iio: adc: ad7768-1: Document multidevice support Jonathan Santos
2026-08-18 6:46 ` Krzysztof Kozlowski
2026-08-18 13:35 ` David Lechner
2026-08-18 15:02 ` David Lechner [this message]
2026-08-18 15:14 ` Nuno Sá
2026-08-18 15:26 ` David Lechner
2026-08-17 23:32 ` [PATCH v3 2/6] spi: support simultaneous assertion of multiple CS Jonathan Santos
2026-08-18 6:39 ` Andy Shevchenko
2026-08-18 16:06 ` David Lechner
2026-08-22 0:10 ` Jonathan Santos
2026-08-17 23:32 ` [PATCH v3 3/6] spi: expand device name to include all CS lines for multi-CS devices Jonathan Santos
2026-08-18 6:45 ` Andy Shevchenko
2026-08-18 16:14 ` Nuno Sá
2026-08-19 6:59 ` Andy Shevchenko
2026-08-17 23:33 ` [PATCH v3 4/6] spi: introduce SPI ancillary device with lanes Jonathan Santos
2026-08-18 6:53 ` Andy Shevchenko
2026-08-17 23:33 ` [PATCH v3 5/6] spi: spi-engine-ex: Add support for multi-CS devices Jonathan Santos
2026-08-18 7:01 ` Andy Shevchenko
2026-08-17 23:33 ` [PATCH v3 6/6] iio: adc: ad7768-1: add support for multiple chip aggregation Jonathan Santos
2026-08-18 7:10 ` Andy Shevchenko
2026-08-18 16:17 ` Nuno Sá
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=9841fd2e-434f-48f3-90c1-d62718d6d4d2@baylibre.com \
--to=dlechner@baylibre.com \
--cc=Jonathan.Santos@analog.com \
--cc=andriy.shevchenko@intel.com \
--cc=broonie@kernel.org \
--cc=jonath4nns@gmail.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-spi@vger.kernel.org \
--cc=marcelo.schmitt1@gmail.com \
--cc=michael.hennerich@analog.com \
--cc=nuno.sa@analog.com \
/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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox