linux-kernel - Re: [PATCH] iio: adc: ad7944: simplify adi,spi-mode property parsing

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Message-ID: <CAHp75VfKZy45RVJmAAOEPyUFTW7MhxJmOeQHj3YV7p-NPKpkvg@mail.gmail.com>
Date: Tue, 19 Mar 2024 00:43:24 +0200
From: Andy Shevchenko <andy.shevchenko@...il.com>
To: David Lechner <dlechner@...libre.com>
Cc: Jonathan Cameron <jic23@...nel.org>, Michael Hennerich <michael.hennerich@...log.com>, 
	Nuno Sá <nuno.sa@...log.com>, linux-iio@...r.kernel.org, 
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] iio: adc: ad7944: simplify adi,spi-mode property parsing

On Mon, Mar 18, 2024 at 11:57 PM David Lechner <dlechner@...libre.com> wrote:
>
> This simplifies the adi,spi-mode property parsing by using
> device_property_match_property_string() instead of two separate
> functions. Also, the error return value is now more informative
> in cases where there was problem parsing the property.

a problem

..

> +       ret = device_property_match_property_string(dev, "adi,spi-mode",
> +                                                   ad7944_spi_modes,
> +                                                   ARRAY_SIZE(ad7944_spi_modes));
> +       if (ret < 0) {
>                 /* absence of adi,spi-mode property means default mode */
> -               adc->spi_mode = AD7944_SPI_MODE_DEFAULT;
> +               if (ret == -EINVAL)
> +                       adc->spi_mode = AD7944_SPI_MODE_DEFAULT;
> +               else
> +                       return dev_err_probe(dev, ret,
> +                                            "getting adi,spi-mode property failed\n");

No need to have 'else'

               if (ret != -EINVAL)
                       return dev_err_probe(dev, ret, "getting
adi,spi-mode property failed\n");

               /* absence of adi,spi-mode property means default mode */
               adc->spi_mode = AD7944_SPI_MODE_DEFAULT;

> +       } else {
> +               adc->spi_mode = ret;
>         }

-- 
With Best Regards,
Andy Shevchenko