linux-kernel - Re: [PATCH v3 04/15] iio: accel: adxl345: use regmap cache for INT mapping

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Message-ID: <20250302114503.26cbcd97@jic23-huawei>
Date: Sun, 2 Mar 2025 11:45:03 +0000
From: Jonathan Cameron <jic23@...nel.org>
To: Lothar Rubusch <l.rubusch@...il.com>
Cc: lars@...afoo.de, Michael.Hennerich@...log.com,
 linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org,
 eraretuya@...il.com
Subject: Re: [PATCH v3 04/15] iio: accel: adxl345: use regmap cache for INT
 mapping

On Thu, 20 Feb 2025 10:42:23 +0000
Lothar Rubusch <l.rubusch@...il.com> wrote:

> Use regmap cache to replace maintaining the member variable intio
> for the interrupt mapping state. The interrupt mapping is initialized
> when the driver is probed, and it is perfectly cacheable.
> 
> The patch will still leave the function set_interrupts(). A follow up
> patch takes care of it, when cleaning up the INT enable register
> variable.
> 
> Signed-off-by: Lothar Rubusch <l.rubusch@...il.com>
> ---
>  drivers/iio/accel/adxl345.h      |  4 ++
>  drivers/iio/accel/adxl345_core.c | 63 ++++++++++++++++++++------------
>  drivers/iio/accel/adxl345_i2c.c  |  2 +
>  drivers/iio/accel/adxl345_spi.c  |  2 +
>  4 files changed, 48 insertions(+), 23 deletions(-)
> 
> diff --git a/drivers/iio/accel/adxl345.h b/drivers/iio/accel/adxl345.h
> index bc6d634bd85c..a2a81caa292a 100644
> --- a/drivers/iio/accel/adxl345.h
> +++ b/drivers/iio/accel/adxl345.h
> @@ -8,6 +8,8 @@
>  #ifndef _ADXL345_H_
>  #define _ADXL345_H_
>  
> +#include <linux/regmap.h>

Why add this include?

The file should have a forwards def of
struct regmap;
which is currently missing.  If you clean that up in this patch that
is fine (mention it in the patch description though as it isn't
directly related) but I don't see a reason to include regmap.h here.

Given rest if fine I'll tweak this whilst applying. Applied to the
togreg branch of iio.git, pushed out for now as testing for 0-day
to poke at it.

Also move to a newer kernel tree. The changes in export symbol
should be causing you build errors for this path. I'll fix that up.
Quotes now needed around IIO_ADXL345 in the EXPORT_SYMBOL_NS_GPL()
calls. I fixed that up.

Jonathan