linux-kernel - Re: [PATCH v3 11/27] staging: iio: resolver: ad2s1210: add debugfs reg access

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Date:   Sat, 30 Sep 2023 15:52:42 +0100
From:   Jonathan Cameron <jic23@...nel.org>
To:     David Lechner <dlechner@...libre.com>
Cc:     linux-iio@...r.kernel.org, devicetree@...r.kernel.org,
        linux-staging@...ts.linux.dev,
        David Lechner <david@...hnology.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Michael Hennerich <Michael.Hennerich@...log.com>,
        Nuno Sá <nuno.sa@...log.com>,
        Axel Haslam <ahaslam@...libre.com>,
        Philip Molloy <pmolloy@...libre.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 11/27] staging: iio: resolver: ad2s1210: add debugfs
 reg access

On Fri, 29 Sep 2023 12:23:16 -0500
David Lechner <dlechner@...libre.com> wrote:

> From: David Lechner <david@...hnology.com>
> 
> From: David Lechner <dlechner@...libre.com>
> 
> This add an implementation of debugfs_reg_access for the AD2S1210
> driver.
> 
> Signed-off-by: David Lechner <dlechner@...libre.com>

I never really care if a driver implements this or not.
However, if you find it useful that's fine, so applied.

Thanks,

Jonathan

> ---
> 
> v3 changes: None
> 
>  drivers/staging/iio/resolver/ad2s1210.c | 20 ++++++++++++++++++++
>  1 file changed, 20 insertions(+)
> 
> diff --git a/drivers/staging/iio/resolver/ad2s1210.c b/drivers/staging/iio/resolver/ad2s1210.c
> index 0663a51d04ad..31415fbb6384 100644
> --- a/drivers/staging/iio/resolver/ad2s1210.c
> +++ b/drivers/staging/iio/resolver/ad2s1210.c
> @@ -614,9 +614,29 @@ static int ad2s1210_initial(struct ad2s1210_state *st)
>  	return ret;
>  }
>  
> +static int ad2s1210_debugfs_reg_access(struct iio_dev *indio_dev,
> +				       unsigned int reg, unsigned int writeval,
> +				       unsigned int *readval)
> +{
> +	struct ad2s1210_state *st = iio_priv(indio_dev);
> +	int ret;
> +
> +	mutex_lock(&st->lock);
> +
> +	if (readval)
> +		ret = regmap_read(st->regmap, reg, readval);
> +	else
> +		ret = regmap_write(st->regmap, reg, writeval);
> +
> +	mutex_unlock(&st->lock);
> +
> +	return ret;
> +}
> +
>  static const struct iio_info ad2s1210_info = {
>  	.read_raw = ad2s1210_read_raw,
>  	.attrs = &ad2s1210_attribute_group,
> +	.debugfs_reg_access = &ad2s1210_debugfs_reg_access,
>  };
>  
>  static int ad2s1210_setup_clocks(struct ad2s1210_state *st)
>