From: Andy Shevchenko <andy.shevchenko@gmail.com>
To: Alisa-Dariana Roman <alisadariana@gmail.com>
Cc: michael.hennerich@analog.com, linux-iio@vger.kernel.org,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
alexandru.tachici@analog.com, lars@metafoo.de, jic23@kernel.org,
robh@kernel.org, krzysztof.kozlowski+dt@linaro.org,
conor+dt@kernel.org, lgirdwood@gmail.com, broonie@kernel.org,
andy@kernel.org, nuno.sa@analog.com, marcelo.schmitt@analog.com,
bigunclemax@gmail.com, dlechner@baylibre.com,
okan.sahin@analog.com, fr0st61te@gmail.com,
alisa.roman@analog.com, marcus.folkesson@gmail.com,
schnelle@linux.ibm.com, liambeguin@gmail.com
Subject: Re: [PATCH v6 3/5] iio: adc: ad7192: Add aincom supply
Date: Wed, 17 Apr 2024 20:08:37 +0300 [thread overview]
Message-ID: <CAHp75VcT3VHcA8YVjc02PBXUxErnWg56Wyn1iiJshYVWv1YWxQ@mail.gmail.com> (raw)
In-Reply-To: <20240417170054.140587-4-alisa.roman@analog.com>
On Wed, Apr 17, 2024 at 8:01 PM Alisa-Dariana Roman
<alisadariana@gmail.com> wrote:
>
> AINCOM should actually be a supply. AINx inputs are referenced to AINCOM
> in pseduo-differential operation mode. AINCOM voltage represets the
pseudo
> offset of corresponding channels.
...
> + case IIO_VOLTAGE:
> + if (st->aincom_mv && !chan->differential)
> + *val += DIV_ROUND_CLOSEST_ULL((u64)st->aincom_mv * 1000000000,
It's quite easy to make a mistake in this long constant. Can you use
an appropriate one from units.h?
> + st->scale_avail[gain][1]);
> + return IIO_VAL_INT;
...
> + aincom = devm_regulator_get_optional(&spi->dev, "aincom");
> + if (!IS_ERR(aincom)) {
Why not a positive condition?
> + ret = regulator_enable(aincom);
> + if (ret) {
> + dev_err(&spi->dev, "Failed to enable specified AINCOM supply\n");
return dev_err_probe();
> + return ret;
> + }
> +
> + ret = devm_add_action_or_reset(&spi->dev, ad7192_reg_disable, aincom);
> + if (ret)
> + return ret;
> +
> + ret = regulator_get_voltage(aincom);
> + if (ret < 0)
> + return dev_err_probe(&spi->dev, ret,
> + "Device tree error, AINCOM voltage undefined\n");
> + st->aincom_mv = ret / 1000;
> + } else {
> + st->aincom_mv = 0;
> + }
...
> @@ -1113,6 +1145,7 @@ static int ad7192_probe(struct spi_device *spi)
> st->int_vref_mv = ret / 1000;
>
> st->chip_info = spi_get_device_match_data(spi);
> +
> indio_dev->name = st->chip_info->name;
> indio_dev->modes = INDIO_DIRECT_MODE;
> indio_dev->channels = st->chip_info->channels;
Stray change.
--
With Best Regards,
Andy Shevchenko
next prev parent reply other threads:[~2024-04-17 17:09 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-17 17:00 [PATCH v6 0/5] iio: adc: ad7192: Add AD7194 support Alisa-Dariana Roman
2024-04-17 17:00 ` [PATCH v6 1/5] iio: adc: ad7192: Use standard attribute Alisa-Dariana Roman
2024-04-20 10:37 ` Jonathan Cameron
2024-04-17 17:00 ` [PATCH v6 2/5] dt-bindings: iio: adc: ad7192: Add aincom supply Alisa-Dariana Roman
2024-04-19 21:35 ` Rob Herring
2024-04-17 17:00 ` [PATCH v6 3/5] " Alisa-Dariana Roman
2024-04-17 17:08 ` Andy Shevchenko [this message]
2024-04-20 10:42 ` Jonathan Cameron
2024-04-17 17:00 ` [PATCH v6 4/5] dt-bindings: iio: adc: ad7192: Add AD7194 support Alisa-Dariana Roman
2024-04-18 14:40 ` Rob Herring
2024-04-20 10:52 ` Jonathan Cameron
2024-04-17 17:00 ` [PATCH v6 5/5] " Alisa-Dariana Roman
2024-04-17 17:06 ` Andy Shevchenko
2024-04-20 10:55 ` Jonathan Cameron
2024-04-20 11:02 ` Jonathan Cameron
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