linux-kernel - Re: [PATCH 5/5] iio: adc: ad7606: Add debug mode for ad7616

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Message-ID: <20190518112437.0ec3d0e8@archlinux>
Date:   Sat, 18 May 2019 11:24:37 +0100
From:   Jonathan Cameron <jic23@...nel.org>
To:     Beniamin Bia <beniamin.bia@...log.com>
Cc:     <lars@...afoo.de>, <Michael.Hennerich@...log.com>,
        <knaack.h@....de>, <pmeerw@...erw.net>,
        <gregkh@...uxfoundation.org>, <linux-iio@...r.kernel.org>,
        <devel@...verdev.osuosl.org>, <linux-kernel@...r.kernel.org>,
        <mark.rutland@....com>, <robh+dt@...nel.org>,
        <devicetree@...r.kernel.org>, <biabeniamin@...look.com>
Subject: Re: [PATCH 5/5] iio: adc: ad7606: Add debug mode for ad7616

On Thu, 16 May 2019 17:32:08 +0300
Beniamin Bia <beniamin.bia@...log.com> wrote:

> Support for register access was added for spi devices.
> 
> Signed-off-by: Beniamin Bia <beniamin.bia@...log.com>
Looks fine.  For my reference please add
Acked-by: Jonathan Cameron <Jonathan.Cameron@...wei.com>

> ---
>  drivers/iio/adc/ad7606.c | 25 +++++++++++++++++++++++++
>  1 file changed, 25 insertions(+)
> 
> diff --git a/drivers/iio/adc/ad7606.c b/drivers/iio/adc/ad7606.c
> index f77df3efe43f..b03bdce4fd4e 100644
> --- a/drivers/iio/adc/ad7606.c
> +++ b/drivers/iio/adc/ad7606.c
> @@ -134,6 +134,30 @@ static int ad7606_spi_write_mask(struct ad7606_state *st,
>  	return ad7606_spi_reg_write(st, addr, readval);
>  }
>  
> +static int ad7606_reg_access(struct iio_dev *indio_dev,
> +			     unsigned int reg,
> +			     unsigned int writeval,
> +			     unsigned int *readval)
> +{
> +	struct ad7606_state *st = iio_priv(indio_dev);
> +	int ret;
> +
> +	mutex_lock(&st->lock);
> +	if (readval) {
> +		ret = ad7606_spi_reg_read(st, reg);
> +		if (ret < 0)
> +			goto err_unlock;
> +		*readval = ret;
> +		ret = 0;
> +	} else {
> +		ret = ad7606_spi_reg_write(st, reg, writeval);
> +	}
> +err_unlock:
> +	mutex_unlock(&st->lock);
> +
> +	return ret;
> +}
> +
>  static int ad7606_read_samples(struct ad7606_state *st)
>  {
>  	unsigned int num = st->chip_info->num_channels;
> @@ -645,6 +669,7 @@ static const struct iio_info ad7606_info_no_os_or_range = {
>  static const struct iio_info ad7606_info_os_and_range = {
>  	.read_raw = &ad7606_read_raw,
>  	.write_raw = &ad7606_write_raw,
> +	.debugfs_reg_access = &ad7606_reg_access,
>  	.attrs = &ad7606_attribute_group_os_and_range,
>  	.validate_trigger = &ad7606_validate_trigger,
>  };