linux-kernel - Re: [PATCH v11 2/8] iio: accel: adxl345: simplify reading the FIFO

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Message-ID: <20250706171114.240334cf@jic23-huawei>
Date: Sun, 6 Jul 2025 17:11:21 +0100
From: Jonathan Cameron <jic23@...nel.org>
To: Lothar Rubusch <l.rubusch@...il.com>
Cc: lars@...afoo.de, Michael.Hennerich@...log.com, dlechner@...libre.com,
 nuno.sa@...log.com, andy@...nel.org, corbet@....net,
 linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org,
 linux-doc@...r.kernel.org, eraretuya@...il.com
Subject: Re: [PATCH v11 2/8] iio: accel: adxl345: simplify reading the FIFO

On Wed,  2 Jul 2025 23:03:09 +0000
Lothar Rubusch <l.rubusch@...il.com> wrote:

> Bulk FIFO reading can be streamlined by eliminating redundant variables and
> simplifying the process of reading x-, y-, and z-axis measurement sets.
> 
> This is a refactoring change with no expected impact on functionality.
> 
> Signed-off-by: Lothar Rubusch <l.rubusch@...il.com>
Applied.
> ---
>  drivers/iio/accel/adxl345_core.c | 7 ++-----
>  1 file changed, 2 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/iio/accel/adxl345_core.c b/drivers/iio/accel/adxl345_core.c
> index 6c437d7a59ed..b7dfd0007aa0 100644
> --- a/drivers/iio/accel/adxl345_core.c
> +++ b/drivers/iio/accel/adxl345_core.c
> @@ -885,15 +885,12 @@ static int adxl345_get_samples(struct adxl345_state *st)
>   */
>  static int adxl345_fifo_transfer(struct adxl345_state *st, int samples)
>  {
> -	size_t count;
>  	int i, ret = 0;
>  
> -	/* count is the 3x the fifo_buf element size, hence 6B */
> -	count = sizeof(st->fifo_buf[0]) * ADXL345_DIRS;
>  	for (i = 0; i < samples; i++) {
> -		/* read 3x 2 byte elements from base address into next fifo_buf position */
>  		ret = regmap_bulk_read(st->regmap, ADXL345_REG_XYZ_BASE,
> -				       st->fifo_buf + (i * count / 2), count);
> +				       st->fifo_buf + (i * ADXL345_DIRS),
> +				       sizeof(st->fifo_buf[0]) * ADXL345_DIRS);
>  		if (ret)
>  			return ret;
>