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Fri, 07 Aug 2026 20:59:06 -0700 (PDT) From: Kurt Borja Date: Fri, 07 Aug 2026 22:58:31 -0500 Subject: [PATCH v3 9/9] iio: adc: ti-ads1262: support common mode supplies Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260807-ads126x-v3-9-f89925d72792@gmail.com> References: <20260807-ads126x-v3-0-f89925d72792@gmail.com> In-Reply-To: <20260807-ads126x-v3-0-f89925d72792@gmail.com> To: Kurt Borja , Jonathan Cameron , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Linus Walleij , Bartosz Golaszewski , David Lechner 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, Jonathan Cameron X-Mailer: b4 0.15.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=1626; i=kuurtb@gmail.com; h=from:subject:message-id; bh=ALPm4wN0XxL4MAFfiFBimkAb2s7JRwqMzky26VfX7JM=; b=owGbwMvMwCUmluBs8WX+lTTG02pJDFllKyv+Bi7cp7Z2Ws4kW07VnctsRJW3+IbVM4j9nBazW Ei6USeqo5SFQYyLQVZMkaU9YdG3R1F5b/0OhN6HmcPKBDKEgYtTACbivJuRYeWM5Y9b32dbyz5U 835veax3o2ybb8nmVZWsf16svJQk9JeRYbXY1eC4ZllZh1OuHVLKgq8MKmM/688WLC+r3/Yjsia RHQA= X-Developer-Key: i=kuurtb@gmail.com; a=openpgp; fpr=54D3BE170AEF777983C3C63B57E3B6585920A69A 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); + 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, -- 2.55.0