linux-kernel - Re: [PATCH v6 5/9] iio: adc: ad7173: refactor ain and vref selection

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Date: Fri, 07 Jun 2024 11:04:30 +0200
From: Nuno Sá <noname.nuno@...il.com>
To: dumitru.ceclan@...log.com
Cc: Lars-Peter Clausen <lars@...afoo.de>, Michael Hennerich
 <Michael.Hennerich@...log.com>, Jonathan Cameron <jic23@...nel.org>, Rob
 Herring <robh@...nel.org>, Krzysztof Kozlowski
 <krzysztof.kozlowski+dt@...aro.org>, Conor Dooley <conor+dt@...nel.org>,
 David Lechner <dlechner@...libre.com>,  linux-iio@...r.kernel.org,
 devicetree@...r.kernel.org,  linux-kernel@...r.kernel.org, Dumitru Ceclan
 <mitrutzceclan@...il.com>
Subject: Re: [PATCH v6 5/9] iio: adc: ad7173: refactor ain and vref selection

On Thu, 2024-06-06 at 19:07 +0300, Dumitru Ceclan via B4 Relay wrote:
> From: Dumitru Ceclan <dumitru.ceclan@...log.com>
> 
> Move validation of analog inputs and reference voltage selection to
> separate functions to reduce the size of the channel config parsing
> function and improve readability.
> Add defines for the number of analog inputs in a channel.
> 
> Signed-off-by: Dumitru Ceclan <dumitru.ceclan@...log.com>
> ---
>  drivers/iio/adc/ad7173.c | 68 +++++++++++++++++++++++++++++++++--------------
> -
>  1 file changed, 47 insertions(+), 21 deletions(-)
> 
> diff --git a/drivers/iio/adc/ad7173.c b/drivers/iio/adc/ad7173.c
> index 8631f218b69e..4040edbd1c32 100644
> --- a/drivers/iio/adc/ad7173.c
> +++ b/drivers/iio/adc/ad7173.c
> @@ -60,6 +60,7 @@
>  #define AD7173_CH_SETUP_AINPOS_MASK	GENMASK(9, 5)
>  #define AD7173_CH_SETUP_AINNEG_MASK	GENMASK(4, 0)
>  
> +#define AD7173_NO_AINS_PER_CHANNEL	2
>  #define AD7173_CH_ADDRESS(pos, neg) \
>  	(FIELD_PREP(AD7173_CH_SETUP_AINPOS_MASK, pos) | \
>  	 FIELD_PREP(AD7173_CH_SETUP_AINNEG_MASK, neg))
> @@ -629,6 +630,7 @@ static int ad7173_setup(struct iio_dev *indio_dev)
>  static unsigned int ad7173_get_ref_voltage_milli(struct ad7173_state *st,
>  						 u8 reference_select)
>  {
> +	struct device *dev = &st->sd.spi->dev;
>  	int vref;
>  
>  	switch (reference_select) {
> @@ -652,9 +654,11 @@ static unsigned int ad7173_get_ref_voltage_milli(struct
> ad7173_state *st,
>  		return -EINVAL;
>  	}
>  
> -	if (vref < 0)
> +	if (vref < 0) {
> +		dev_err(dev, "Cannot use reference %u. Error:%d\n",
> +			reference_select, vref);
>  		return vref;
> -
> +	}
>  	return vref / (MICRO / MILLI);
>  }

unrelated?

- Nuno Sá