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([2600:8803:e7e4:500:99c2:f16e:201c:3bb5]) by smtp.gmail.com with ESMTPSA id 006d021491bc7-6b02bc2e840sm5607169eaf.6.2026.08.08.11.40.44 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sat, 08 Aug 2026 11:40:45 -0700 (PDT) Message-ID: Date: Sat, 8 Aug 2026 13:40:44 -0500 Precedence: bulk X-Mailing-List: linux-gpio@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3 9/9] iio: adc: ti-ads1262: support common mode supplies To: Kurt Borja , Jonathan Cameron , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Linus Walleij , Bartosz Golaszewski Cc: =?UTF-8?Q?Nuno_S=C3=A1?= , Andy Shevchenko , linux-iio@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-gpio@vger.kernel.org References: <20260807-ads126x-v3-0-f89925d72792@gmail.com> <20260807-ads126x-v3-9-f89925d72792@gmail.com> Content-Language: en-US From: David Lechner In-Reply-To: <20260807-ads126x-v3-9-f89925d72792@gmail.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 8/7/26 10:58 PM, Kurt Borja wrote: > Enable common mode regulators. The usual configuration is to have our > own 'vbias' regulator connected internally as common mode voltage on the > AINCOM pin. > > Signed-off-by: Kurt Borja > --- > drivers/iio/adc/ti-ads1262.c | 25 +++++++++++++++++++++++++ > 1 file changed, 25 insertions(+) > > diff --git a/drivers/iio/adc/ti-ads1262.c b/drivers/iio/adc/ti-ads1262.c > index 533574169b04..238d803abc50 100644 > --- a/drivers/iio/adc/ti-ads1262.c > +++ b/drivers/iio/adc/ti-ads1262.c > @@ -962,6 +962,27 @@ static irqreturn_t ads1262_irq_handler(int irq, void *dev_id) > return IRQ_HANDLED; > } > > +static int ads1262_common_mode_setup(struct ads1262 *st) > +{ > + struct device *dev = &st->spi->dev; > + char name[sizeof("aincom")]; > + int ret; > + > + for (unsigned int i = 0; i <= ADS1262_INPMUX_AINCOM; i++) { > + if (i < ADS1262_INPMUX_AINCOM) > + scnprintf(name, sizeof(name), "ain%u", i); > + else > + scnprintf(name, sizeof(name), "aincom"); > + > + ret = devm_regulator_get_enable_optional(dev, name); We need to get the voltage which is then used to provide an offset (IIO_CHAN_INFO_OFFSET) for the channel. > + if (ret < 0 && ret != -ENODEV) > + return dev_err_probe(dev, ret, > + "failed to get common mode supply: %s\n", name); > + } > + > + return 0; > +} > + > static int ads1262_regulator_enable(struct regulator_dev *rdev) > { > struct ads1262 *st = rdev_get_drvdata(rdev); > @@ -1797,6 +1818,10 @@ static int ads1262_spi_probe(struct spi_device *spi) > if (ret) > return ret; > > + ret = ads1262_common_mode_setup(st); > + if (ret) > + return ret; > + > ret = devm_iio_triggered_buffer_setup(dev, indio_dev, > iio_pollfunc_store_time, > ads1262_trigger_handler, >