linux-kernel - Re: [PATCH 4/4] iio: pressure: bmp280: use IIO_DECLARE_BUFFER_WITH

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Message-ID: <9cdb05b5-299c-472f-a582-13a7d1368f3b@baylibre.com>
Date: Sat, 19 Apr 2025 13:04:08 -0500
From: David Lechner <dlechner@...libre.com>
To: Andy Shevchenko <andy@...nel.org>
Cc: Jonathan Cameron <jic23@...nel.org>, Nuno Sá
 <nuno.sa@...log.com>, Lars-Peter Clausen <lars@...afoo.de>,
 Michael Hennerich <Michael.Hennerich@...log.com>, linux-iio@...r.kernel.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH 4/4] iio: pressure: bmp280: use IIO_DECLARE_BUFFER_WITH_TS

On 4/19/25 11:39 AM, Andy Shevchenko wrote:
> On Fri, Apr 18, 2025 at 05:58:35PM -0500, David Lechner wrote:
>> Use IIO_DECLARE_BUFFER_WITH_TS to declare the buffer that gets used with
>> iio_push_to_buffers_with_ts(). This makes the code a bit easier to read
>> and understand.
>>
>> The data type is changed so that we can drop the casts when the buffer
>> is used.
> 
> This one is good, with the comment to have it DMA aligned.
> 
> Reviewed-by: Andy Shevchenko <andy@...nel.org>
> 

Strictly speaking, this one doesn't need to be DMA-safe. This buffer isn't
passed to SPI or any other bus. It is just used for iio_push_to_buffers_with_ts()
and has data copied to it from elsewhere just before that.