linux-kernel - Re: [PATCH v6 10/17] iio: adc: ad7944: don't use storagebits for sizing

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Message-ID: <20241214165602.781da5db@jic23-huawei>
Date: Sat, 14 Dec 2024 16:56:02 +0000
From: Jonathan Cameron <jic23@...nel.org>
To: David Lechner <dlechner@...libre.com>
Cc: Mark Brown <broonie@...nel.org>, Rob Herring <robh@...nel.org>,
 Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley
 <conor+dt@...nel.org>, Nuno Sá <nuno.sa@...log.com>, Uwe
 Kleine-König <ukleinek@...nel.org>, Michael Hennerich
 <Michael.Hennerich@...log.com>, Lars-Peter Clausen <lars@...afoo.de>, David
 Jander <david@...tonic.nl>, Martin Sperl <kernel@...tin.sperl.org>,
 linux-spi@...r.kernel.org, devicetree@...r.kernel.org,
 linux-kernel@...r.kernel.org, linux-iio@...r.kernel.org,
 linux-pwm@...r.kernel.org
Subject: Re: [PATCH v6 10/17] iio: adc: ad7944: don't use storagebits for
 sizing

On Wed, 11 Dec 2024 14:54:47 -0600
David Lechner <dlechner@...libre.com> wrote:

> Replace use of storagebits with realbits for determining the number of
> bytes needed for SPI transfers.
> 
> When adding SPI offload support, storagebits will no longer be
> guaranteed to be the "best fit" for 16-bit chips so we can no longer
> rely on storagebits being the correct size expected by the SPI
> framework. Instead, derive the correct size from realbits since it will
> always be correct even when SPI offloads are used.
A more specific example with widths etc might be useful addition to this
commit message.

> 
> Signed-off-by: David Lechner <dlechner@...libre.com>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@...wei.com>