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Thu, 27 Aug 2026 23:38:56 -0700 (PDT) From: Kurt Borja Date: Fri, 28 Aug 2026 01:38:24 -0500 Subject: [PATCH v4 09/10] iio: adc: ti-ads1262: support REFOUT and VBIAS regulators 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: <20260828-ads126x-v4-9-1dc27e9c0260@gmail.com> References: <20260828-ads126x-v4-0-1dc27e9c0260@gmail.com> In-Reply-To: <20260828-ads126x-v4-0-1dc27e9c0260@gmail.com> To: Kurt Borja , Jonathan Cameron , Rob Herring , Krzysztof Kozlowski , Conor Dooley , 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 X-Mailer: b4 0.15.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=4665; i=kuurtb@gmail.com; h=from:subject:message-id; bh=awLx3251t6HAnsVHNTGEYJXrS1sww/D1jVL1AboaEro=; b=owGbwMvMwCUmluBs8WX+lTTG02pJDFkTdd4oLX6VJJ3+u922OXPW1B1B1xVX8jzfcEWz44lR2 HpO7Z7dHaUsDGJcDLJiiiztCYu+PYrKe+t3IPQ+zBxWJpAhDFycAjARv/+MDKsDureeneUeEPi/ Ym0hO+/tN8dEn3zhaub5X7vIcEXY54uMDBubVlxv8L2m5t4rWXW17+i+X9zy4oVc/HKRMp4e2nw HOAA= X-Developer-Key: i=kuurtb@gmail.com; a=openpgp; fpr=54D3BE170AEF777983C3C63B57E3B6585920A69A Register the "refout" and "vbias" regulators to be able to use them as common mode supplies. Signed-off-by: Kurt Borja --- drivers/iio/adc/Kconfig | 1 + drivers/iio/adc/ti-ads1262.c | 119 +++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 120 insertions(+) diff --git a/drivers/iio/adc/Kconfig b/drivers/iio/adc/Kconfig index 2b60ade01e90..4548fec1f86f 100644 --- a/drivers/iio/adc/Kconfig +++ b/drivers/iio/adc/Kconfig @@ -1864,6 +1864,7 @@ config TI_ADS1262 tristate "Texas Instruments ADS1262" depends on SPI select REGMAP + select REGULATOR select IIO_BUFFER select IIO_TRIGGERED_BUFFER help diff --git a/drivers/iio/adc/ti-ads1262.c b/drivers/iio/adc/ti-ads1262.c index 3f6d34a08b29..4784142f35c9 100644 --- a/drivers/iio/adc/ti-ads1262.c +++ b/drivers/iio/adc/ti-ads1262.c @@ -25,6 +25,7 @@ #include #include #include +#include #include #include #include @@ -1132,6 +1133,120 @@ static irqreturn_t ads1262_irq_handler(int irq, void *dev_id) return IRQ_HANDLED; } +static int ads1262_vbias_enable(struct regulator_dev *rdev) +{ + struct ads1262 *st = rdev_get_drvdata(rdev); + + guard(mutex)(&st->xfer_lock); + + return regmap_set_bits(st->regmap, ADS1262_POWER_REG, + ADS1262_POWER_VBIAS_MASK); +} + +static int ads1262_vbias_disable(struct regulator_dev *rdev) +{ + struct ads1262 *st = rdev_get_drvdata(rdev); + + guard(mutex)(&st->xfer_lock); + + return regmap_clear_bits(st->regmap, ADS1262_POWER_REG, + ADS1262_POWER_VBIAS_MASK); +} + +static int ads1262_vbias_is_enabled(struct regulator_dev *rdev) +{ + struct ads1262 *st = rdev_get_drvdata(rdev); + + guard(mutex)(&st->xfer_lock); + + return regmap_test_bits(st->regmap, ADS1262_POWER_REG, + ADS1262_POWER_VBIAS_MASK); +} + +static int ads1262_vbias_get_voltage(struct regulator_dev *rdev) +{ + struct ads1262 *st = rdev_get_drvdata(rdev); + int avdd_uV, avss_uV; + + avdd_uV = regulator_get_voltage(st->avdd_supply); + if (avdd_uV < 0) + return avdd_uV; + + avss_uV = st->avss_supply ? regulator_get_voltage(st->avss_supply) : 0; + if (avss_uV < 0) + return avss_uV; + + return DIV_ROUND_CLOSEST(avdd_uV - avss_uV, 2); +} + +static const struct regulator_ops ads1262_vbias_regulator_ops = { + .enable = ads1262_vbias_enable, + .disable = ads1262_vbias_disable, + .is_enabled = ads1262_vbias_is_enabled, + .get_voltage = ads1262_vbias_get_voltage, +}; + +static int ads1262_refout_is_enabled(struct regulator_dev *rdev) +{ + struct ads1262 *st = rdev_get_drvdata(rdev); + + guard(mutex)(&st->xfer_lock); + + return regmap_test_bits(st->regmap, ADS1262_POWER_REG, + ADS1262_POWER_INTREF_MASK); +} + +static const struct regulator_ops ads1262_refout_regulator_ops = { + .is_enabled = ads1262_refout_is_enabled, +}; + +static const struct regulator_desc ads1262_vbias_regulator_desc = { + .name = "vbias", + .of_match = "vbias", + .regulators_node = "regulators", + .supply_name = "avdd", + .ops = &ads1262_vbias_regulator_ops, + .type = REGULATOR_VOLTAGE, + .owner = THIS_MODULE, +}; + +static const struct regulator_desc ads1262_refout_regulator_desc = { + .name = "refout", + .of_match = "refout", + .regulators_node = "regulators", + .supply_name = "avdd", + .n_voltages = 1, + .fixed_uV = 2500000, + .ops = &ads1262_refout_regulator_ops, + .type = REGULATOR_VOLTAGE, + .owner = THIS_MODULE, +}; + +static int ads1262_register_regulators(struct ads1262 *st) +{ + struct device *dev = &st->spi->dev; + struct regulator_config config = { + .dev = dev, + .driver_data = st, + }; + struct regulator_dev *rdev; + + struct fwnode_handle *reg_node __free(fwnode_handle) = + device_get_named_child_node(dev, "regulators"); + if (!reg_node) + return 0; + + rdev = devm_regulator_register(dev, &ads1262_refout_regulator_desc, + &config); + if (IS_ERR(rdev)) + return PTR_ERR(rdev); + + rdev = devm_regulator_register(dev, &ads1262_vbias_regulator_desc, + &config); + + return PTR_ERR_OR_ZERO(rdev); +} + static int ads1262_dev_configure(struct ads1262 *st) { struct device *dev = &st->spi->dev; @@ -1939,6 +2054,10 @@ static int ads1262_spi_probe(struct spi_device *spi) indio_dev->name = ads1262_device_id_to_name[st->dev_id]; + ret = ads1262_register_regulators(st); + if (ret) + return ret; + ret = ads1262_populate_tables(indio_dev); if (ret) return ret; -- 2.55.0