linux-kernel - Re: [PATCH v8 3/6] IIO: Ingenic JZ47xx: Add xlate cb to retrieve correct channel idx

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Date:   Sun, 12 Jul 2020 13:05:17 +0100
From:   Jonathan Cameron <jic23@...nel.org>
To:     Artur Rojek <contact@...ur-rojek.eu>
Cc:     Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Paul Cercueil <paul@...pouillou.net>,
        Andy Shevchenko <andy.shevchenko@...il.com>,
        Heiko Stuebner <heiko@...ech.de>,
        Ezequiel Garcia <ezequiel@...guardiasur.com.ar>,
        devicetree@...r.kernel.org, linux-iio@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v8 3/6] IIO: Ingenic JZ47xx: Add xlate cb to retrieve
 correct channel idx

On Thu,  9 Jul 2020 17:21:57 +0200
Artur Rojek <contact@...ur-rojek.eu> wrote:

> Provide an of_xlate callback in order to retrieve the correct channel
> specifier index from the IIO channels array.
> 
> Signed-off-by: Artur Rojek <contact@...ur-rojek.eu>
> Tested-by: Paul Cercueil <paul@...pouillou.net>
Applied.  Thanks,

Jonathan

> ---
> 
>  Changes:
> 
>  v2-v8: no change
> 
>  drivers/iio/adc/ingenic-adc.c | 16 ++++++++++++++++
>  1 file changed, 16 insertions(+)
> 
> diff --git a/drivers/iio/adc/ingenic-adc.c b/drivers/iio/adc/ingenic-adc.c
> index c1946a9f1cca..89019fb59d48 100644
> --- a/drivers/iio/adc/ingenic-adc.c
> +++ b/drivers/iio/adc/ingenic-adc.c
> @@ -400,6 +400,21 @@ static int ingenic_adc_read_raw(struct iio_dev *iio_dev,
>  	}
>  }
>  
> +static int ingenic_adc_of_xlate(struct iio_dev *iio_dev,
> +				const struct of_phandle_args *iiospec)
> +{
> +	int i;
> +
> +	if (!iiospec->args_count)
> +		return -EINVAL;
> +
> +	for (i = 0; i < iio_dev->num_channels; ++i)
> +		if (iio_dev->channels[i].channel == iiospec->args[0])
> +			return i;
> +
> +	return -EINVAL;
> +}
> +
>  static void ingenic_adc_clk_cleanup(void *data)
>  {
>  	clk_unprepare(data);
> @@ -409,6 +424,7 @@ static const struct iio_info ingenic_adc_info = {
>  	.write_raw = ingenic_adc_write_raw,
>  	.read_raw = ingenic_adc_read_raw,
>  	.read_avail = ingenic_adc_read_avail,
> +	.of_xlate = ingenic_adc_of_xlate,
>  };
>  
>  static const struct iio_chan_spec ingenic_channels[] = {