On 21/11/2023 22:36, marcelo.schmitt@xxxxxxxxxx wrote:
> From: Marcelo Schmitt <marcelo.schmitt@xxxxxxxxxx>
>
> Add support for Analog Devices AD7091R-2, AD7091R-4, and AD7091R-8
> low power 12-Bit SAR ADCs.
> Extend ad7091r-base driver so it can be used by AD7091R-8 drivers.
>
> Signed-off-by: Marcelo Schmitt <marcelo.schmitt@xxxxxxxxxx>
> ---
>
> Device read/write might look odd due to the transfer protocol for these devices.
> I'm glad to hear any suggestions on how to make it better.
>
...
> +
> +static int ad7091r8_gpio_setup(struct ad7091r_state *st)
> +{
> + st->convst_gpio = devm_gpiod_get(st->dev, "adi,conversion-start",
> + GPIOD_OUT_LOW);
> + if (IS_ERR(st->convst_gpio))
> + return dev_err_probe(st->dev, PTR_ERR(st->convst_gpio),
> + "Error getting convst GPIO: %ld\n",
> + PTR_ERR(st->convst_gpio));
Don't print error code twice.
> +
> + st->reset_gpio = devm_gpiod_get_optional(st->dev, "reset",
> + GPIOD_OUT_HIGH);
> + if (IS_ERR(st->reset_gpio))
> + return PTR_ERR(st->reset_gpio);
> +
> + if (st->reset_gpio) {
> + fsleep(20);
> + gpiod_set_value_cansleep(st->reset_gpio, 0);
> + }
> +
> + return 0;
> +}
> +
> +static int ad7091r8_spi_probe(struct spi_device *spi)
> +{
> + const struct ad7091r_chip_info *chip_info;
> + struct ad7091r_state *st;
> + struct iio_dev *iio_dev;
> + struct regmap *map;
> + int ret;
> +
> + chip_info = spi_get_device_match_data(spi);
> + if (!chip_info)
> + return -EINVAL;
> +
> + iio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st));
> + if (!iio_dev)
> + return -ENOMEM;
> +
> + st = iio_priv(iio_dev);
> + st->dev = &spi->dev;
> +
> + map = devm_regmap_init(&spi->dev, &ad7091r8_regmap_bus, st,
> + &ad7091r_spi_regmap_config[chip_info->type]);
> +
> + if (IS_ERR(map))
> + return dev_err_probe(&spi->dev, PTR_ERR(map),
> + "Error initializing spi regmap: %ld\n",
> + PTR_ERR(map));
Don't print error code twice.
Best regards,
Krzysztof
