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[82.37.38.229]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-427d2911486sm21217445e9.0.2024.07.19.05.51.00 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 19 Jul 2024 05:51:01 -0700 (PDT) From: Joshua Felmeden Date: Fri, 19 Jul 2024 13:50:53 +0100 Subject: [PATCH v4 1/2] dt-bindings: iio: humidity: add ENS210 sensor family 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: quoted-printable Message-Id: <20240719-ens21x-v4-1-6044e48a376a@thegoodpenguin.co.uk> References: <20240719-ens21x-v4-0-6044e48a376a@thegoodpenguin.co.uk> In-Reply-To: <20240719-ens21x-v4-0-6044e48a376a@thegoodpenguin.co.uk> To: Jonathan Cameron , Lars-Peter Clausen , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Joshua Felmeden Cc: linux-iio@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org X-Mailer: b4 0.14.0 X-Developer-Signature: v=1; a=ed25519-sha256; t=1721393458; l=1876; i=jfelmeden@thegoodpenguin.co.uk; s=20240709; h=from:subject:message-id; bh=y/rn74vXp3VmNsr+fCQxctMOwKY8V1bRIITpxLrG+I8=; b=JRludKGe8VWUb/+d7PZAhqnN35sT0EnIdca6S6VfS1uASfVfZVxSYzR1Wpos3Rw6vfu6FUaG5 eYwbJOGhFuLBAcv/gAPFWDKzBE+Oa20zF5RI7/sg89zi9QovuCLJ6XO X-Developer-Key: i=jfelmeden@thegoodpenguin.co.uk; a=ed25519; pk=tePkZ5iJ3ejQ2O3vjhsj7GrLYcyJN1o1sMT3IEXvKo0= Add device tree documentation for ENS210 family of temperature and humidity sensors Signed-off-by: Joshua Felmeden Reviewed-by: Conor Dooley --- .../bindings/iio/humidity/sciosense,ens210.yaml | 55 ++++++++++++++++++= ++++ 1 file changed, 55 insertions(+) diff --git a/Documentation/devicetree/bindings/iio/humidity/sciosense,ens21= 0.yaml b/Documentation/devicetree/bindings/iio/humidity/sciosense,ens210.ya= ml new file mode 100644 index 000000000000..ed0ea938f7f8 --- /dev/null +++ b/Documentation/devicetree/bindings/iio/humidity/sciosense,ens210.yaml @@ -0,0 +1,55 @@ +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/iio/humidity/sciosense,ens210.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: ScioSense ENS210 temperature and humidity sensor + +maintainers: + - Joshua Felmeden + +description: | + Temperature and Humidity sensor. + + Datasheet: + https://www.sciosense.com/wp-content/uploads/2024/04/ENS21x-Datasheet.= pdf + https://www.sciosense.com/wp-content/uploads/2023/12/ENS210-Datasheet.= pdf + +properties: + compatible: + oneOf: + - items: + - enum: + - sciosense,ens210a + - sciosense,ens211 + - sciosense,ens212 + - sciosense,ens213a + - sciosense,ens215 + - const: sciosense,ens210 + - const: sciosense,ens210 + + reg: + maxItems: 1 + + vdd-supply: true + +required: + - compatible + - reg + +additionalProperties: false + +examples: + - | + i2c { + #address-cells =3D <1>; + #size-cells =3D <0>; + + temperature-sensor@43 { + compatible =3D "sciosense,ens210"; + reg =3D <0x43>; + }; + }; +... + --=20 2.39.2 From nobody Tue Dec 16 17:55:58 2025 Received: from mail-wm1-f50.google.com (mail-wm1-f50.google.com [209.85.128.50]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 558B813C904 for ; Fri, 19 Jul 2024 12:51:05 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.50 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1721393467; cv=none; b=UxIFTyWsSxZ5B4qRDkrM7zO2nn9H/DjSTLkaFXEQQ8yOru6iHOJNNwVxadxrasdzjGjDdxrwgk96Fo6OCis5Fk0ZX8KxfQeRkfR+rzn9aS40B0/1Noq1NoMp/xCtXnxm+viORcRWfn4TVMEv/UeS2BqfQzcovZ6tew/e+VSjG+g= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1721393467; c=relaxed/simple; bh=LvPY47ZKo3Tui6dtaG9dph3g887IEcqLVyuYsUo+nAs=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; 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[82.37.38.229]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-427d2911486sm21217445e9.0.2024.07.19.05.51.01 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 19 Jul 2024 05:51:03 -0700 (PDT) From: Joshua Felmeden Date: Fri, 19 Jul 2024 13:50:54 +0100 Subject: [PATCH v4 2/2] iio: humidity: Add support for ENS210 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: quoted-printable Message-Id: <20240719-ens21x-v4-2-6044e48a376a@thegoodpenguin.co.uk> References: <20240719-ens21x-v4-0-6044e48a376a@thegoodpenguin.co.uk> In-Reply-To: <20240719-ens21x-v4-0-6044e48a376a@thegoodpenguin.co.uk> To: Jonathan Cameron , Lars-Peter Clausen , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Joshua Felmeden Cc: linux-iio@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org X-Mailer: b4 0.14.0 X-Developer-Signature: v=1; a=ed25519-sha256; t=1721393458; l=11384; i=jfelmeden@thegoodpenguin.co.uk; s=20240709; h=from:subject:message-id; bh=LvPY47ZKo3Tui6dtaG9dph3g887IEcqLVyuYsUo+nAs=; b=mOErL2FoA5ayRIaRc/veMFbW9GGgEc2xVsG9865fBe0UO58FNUlKq/YB7w8S50deWaL1mA2N7 9Xgg25qqByOCy6YkedJsap0wjWDnZFpPQi/t6rv3z6PUCIAYt785GDr X-Developer-Key: i=jfelmeden@thegoodpenguin.co.uk; a=ed25519; pk=tePkZ5iJ3ejQ2O3vjhsj7GrLYcyJN1o1sMT3IEXvKo0= Add support for ENS210/ENS210A/ENS211/ENS212/ENS213A/ENS215. The ENS21x is a family of temperature and relative humidity sensors with accuracies tailored to the needs of specific applications. Signed-off-by: Joshua Felmeden --- drivers/iio/humidity/Kconfig | 11 ++ drivers/iio/humidity/Makefile | 1 + drivers/iio/humidity/ens210.c | 341 ++++++++++++++++++++++++++++++++++++++= ++++ 3 files changed, 353 insertions(+) diff --git a/drivers/iio/humidity/Kconfig b/drivers/iio/humidity/Kconfig index b15b7a3b66d5..54f11f000b6f 100644 --- a/drivers/iio/humidity/Kconfig +++ b/drivers/iio/humidity/Kconfig @@ -25,6 +25,17 @@ config DHT11 Other sensors should work as well as long as they speak the same protocol. =20 +config ENS210 + tristate "ENS210 temperature and humidity sensor" + depends on I2C + select CRC7 + help + Say yes here to get support for the ScioSense ENS210 family of + humidity and temperature sensors. + + This driver can also be built as a module. If so, the module will be + called ens210. + config HDC100X tristate "TI HDC100x relative humidity and temperature sensor" depends on I2C diff --git a/drivers/iio/humidity/Makefile b/drivers/iio/humidity/Makefile index 5fbeef299f61..34b3dc749466 100644 --- a/drivers/iio/humidity/Makefile +++ b/drivers/iio/humidity/Makefile @@ -5,6 +5,7 @@ =20 obj-$(CONFIG_AM2315) +=3D am2315.o obj-$(CONFIG_DHT11) +=3D dht11.o +obj-$(CONFIG_ENS210) +=3D ens210.o obj-$(CONFIG_HDC100X) +=3D hdc100x.o obj-$(CONFIG_HDC2010) +=3D hdc2010.o obj-$(CONFIG_HDC3020) +=3D hdc3020.o diff --git a/drivers/iio/humidity/ens210.c b/drivers/iio/humidity/ens210.c new file mode 100644 index 000000000000..4655e8cb4f51 --- /dev/null +++ b/drivers/iio/humidity/ens210.c @@ -0,0 +1,341 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * ens210.c - Support for ScioSense ens210 temperature & humidity sensor f= amily + * + * (7-bit I2C slave address 0x43 ENS210) + * (7-bit I2C slave address 0x43 ENS210A) + * (7-bit I2C slave address 0x44 ENS211) + * (7-bit I2C slave address 0x45 ENS212) + * (7-bit I2C slave address 0x46 ENS213A) + * (7-bit I2C slave address 0x47 ENS215) + * + * Datasheet: + * https://www.sciosense.com/wp-content/uploads/2024/04/ENS21x-Datasheet.= pdf + * https://www.sciosense.com/wp-content/uploads/2023/12/ENS210-Datasheet.= pdf + */ + +#include +#include +#include +#include +#include +#include +#include + +#include + +/* register definitions */ +#define ENS210_REG_PART_ID 0x00 +#define ENS210_REG_DIE_REV 0x02 +#define ENS210_REG_UID 0x04 +#define ENS210_REG_SYS_CTRL 0x10 +#define ENS210_REG_SYS_STAT 0x11 +#define ENS210_REG_SENS_RUN 0x21 +#define ENS210_REG_SENS_START 0x22 +#define ENS210_REG_SENS_STOP 0x23 +#define ENS210_REG_SENS_STAT 0x24 +#define ENS210_REG_T_VAL 0x30 +#define ENS210_REG_H_VAL 0x33 + +/* value definitions */ +#define ENS210_SENS_START_T_START BIT(0) +#define ENS210_SENS_START_H_START BIT(1) + +#define ENS210_SENS_STAT_T_ACTIVE BIT(0) +#define ENS210_SENS_STAT_H_ACTIVE BIT(1) + +#define ENS210_SYS_CTRL_LOW_POWER_ENABLE BIT(0) +#define ENS210_SYS_CTRL_SYS_RESET BIT(7) + +#define ENS210_SYS_STAT_SYS_ACTIVE BIT(0) + +enum ens210_partnumber { + ENS210 =3D 0x0210, + ENS210A =3D 0xa210, + ENS211 =3D 0x0211, + ENS212 =3D 0x0212, + ENS213A =3D 0xa213, + ENS215 =3D 0x0215, +}; + +/** + * struct ens210_chip_info - Humidity/Temperature chip specific information + * @name: name of device + * @part_id: chip identifier + * @conv_time_msec: time for conversion calculation in m/s + */ +struct ens210_chip_info { + const char *name; + enum ens210_partnumber part_id; + unsigned int conv_time_msec; +}; + +/** + * struct ens210_data - Humidity/Temperature sensor device structure + * @client: i2c client + * @lock: lock protecting the i2c conversion + * @res_index: index to selected sensor resolution + */ +struct ens210_data { + struct i2c_client *client; + const struct ens210_chip_info *chip_info; + struct mutex lock; +}; + +/* calculate 17-bit crc7 */ +static u8 ens210_crc7(u32 val) +{ + __be32 val_be =3D (cpu_to_be32(val & 0x1ffff) >> 0x8); + + return crc7_be(0xde, (u8 *)&val_be, 3) >> 1; +} + +static int ens210_get_measurement(struct iio_dev *indio_dev, bool temp, in= t *val) +{ + u32 regval; + u8 regval_le[3]; + int ret; + struct ens210_data *data =3D iio_priv(indio_dev); + + /* assert read */ + ret =3D i2c_smbus_write_byte_data(data->client, ENS210_REG_SENS_START, + temp ? ENS210_SENS_START_T_START : + ENS210_SENS_START_H_START); + if (ret) + return ret; + + /* wait for conversion to be ready */ + msleep(data->chip_info->conv_time_msec); + + ret =3D i2c_smbus_read_byte_data(data->client, + ENS210_REG_SENS_STAT); + if (ret < 0) + return ret; + + /* perform read */ + ret =3D i2c_smbus_read_i2c_block_data( + data->client, temp ? ENS210_REG_T_VAL : ENS210_REG_H_VAL, 3, + (u8 *)®val_le); + if (ret < 0) { + dev_err(&data->client->dev, "failed to read register"); + return -EIO; + } else if (ret !=3D 3) { + dev_err(&indio_dev->dev, "expected 3 bytes, received %d\n", ret); + return -EIO; + } + + regval =3D get_unaligned_le24(regval_le); + if (ens210_crc7(regval) !=3D ((regval >> 17) & 0x7f)) { + /* crc fail */ + dev_err(&indio_dev->dev, "ens invalid crc\n"); + return -EIO; + } + + *val =3D regval & 0xffff; + return IIO_VAL_INT; +} + +static int ens210_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *channel, int *val, + int *val2, long mask) +{ + struct ens210_data *data =3D iio_priv(indio_dev); + int ret =3D -EINVAL; + + switch (mask) { + case IIO_CHAN_INFO_RAW: + scoped_guard(mutex, &data->lock) { + ret =3D ens210_get_measurement( + indio_dev, channel->type =3D=3D IIO_TEMP, val); + if (ret) + return ret; + return IIO_VAL_INT; + } + return ret; + case IIO_CHAN_INFO_SCALE: + if (channel->type =3D=3D IIO_TEMP) { + *val =3D 15; + *val2 =3D 625000; + } else { + *val =3D 1; + *val2 =3D 953125; + } + return IIO_VAL_INT_PLUS_MICRO; + case IIO_CHAN_INFO_OFFSET: + if (channel->type =3D=3D IIO_TEMP) { + *val =3D -17481; + *val2 =3D 600000; + ret =3D IIO_VAL_INT_PLUS_MICRO; + break; + } + *val =3D 0; + return IIO_VAL_INT; + default: + return -EINVAL; + } + return ret; +} + +static const struct iio_chan_spec ens210_channels[] =3D { + { + .type =3D IIO_TEMP, + .info_mask_separate =3D BIT(IIO_CHAN_INFO_RAW) | + BIT(IIO_CHAN_INFO_SCALE) | + BIT(IIO_CHAN_INFO_OFFSET), + }, + { + .type =3D IIO_HUMIDITYRELATIVE, + .info_mask_separate =3D BIT(IIO_CHAN_INFO_RAW) | + BIT(IIO_CHAN_INFO_SCALE) | + BIT(IIO_CHAN_INFO_OFFSET), + } +}; + +static const struct iio_info ens210_info =3D { + .read_raw =3D ens210_read_raw, +}; + +static int ens210_probe(struct i2c_client *client) +{ + const struct i2c_device_id *id =3D i2c_client_get_device_id(client); + struct ens210_data *data; + struct iio_dev *indio_dev; + uint16_t part_id; + int ret; + + if (!i2c_check_functionality(client->adapter, + I2C_FUNC_SMBUS_WRITE_BYTE_DATA | + I2C_FUNC_SMBUS_WRITE_BYTE | + I2C_FUNC_SMBUS_READ_I2C_BLOCK)) { + dev_err_probe(&client->dev, -EOPNOTSUPP, + "adapter does not support some i2c transactions\n"); + return -EOPNOTSUPP; + } + + indio_dev =3D devm_iio_device_alloc(&client->dev, sizeof(*data)); + if (!indio_dev) + return -ENOMEM; + + data =3D iio_priv(indio_dev); + i2c_set_clientdata(client, indio_dev); + data->client =3D client; + mutex_init(&data->lock); + data->chip_info =3D i2c_get_match_data(client); + + ret =3D devm_regulator_get_enable(&client->dev, "vdd"); + if (ret) + return ret; + + /* reset device */ + ret =3D i2c_smbus_write_byte_data(client, ENS210_REG_SYS_CTRL, + ENS210_SYS_CTRL_SYS_RESET); + if (ret) + return ret; + + /* wait for device to become active */ + usleep_range(4000, 5000); + + /* disable low power mode */ + ret =3D i2c_smbus_write_byte_data(client, ENS210_REG_SYS_CTRL, 0x00); + if (ret) + return ret; + + /* wait for device to finish */ + usleep_range(4000, 5000); + + /* get part_id */ + part_id =3D i2c_smbus_read_word_data(client, ENS210_REG_PART_ID); + + if (part_id !=3D data->chip_info->part_id) { + dev_info(&client->dev, + "Part ID does not match (0x%04x !=3D 0x%04lx)\n", part_id, + data->chip_info->part_id); + } + + /* reenable low power */ + ret =3D i2c_smbus_write_byte_data(client, ENS210_REG_SYS_CTRL, + ENS210_SYS_CTRL_LOW_POWER_ENABLE); + if (ret) + return ret; + + indio_dev->name =3D data->chip_info->name; + indio_dev->modes =3D INDIO_DIRECT_MODE; + indio_dev->channels =3D ens210_channels; + indio_dev->num_channels =3D ARRAY_SIZE(ens210_channels); + indio_dev->info =3D &ens210_info; + + return devm_iio_device_register(&client->dev, indio_dev); +} + +static const struct ens210_chip_info ens210_chip_info_data =3D { + .name =3D "ens210", + .part_id =3D ENS210, + .conv_time_msec =3D 130, +}; + +static const struct ens210_chip_info ens210a_chip_info_data =3D { + .name =3D "ens210a", + .part_id =3D ENS210A, + .conv_time_msec =3D 130, +}; + +static const struct ens210_chip_info ens211_chip_info_data =3D { + .name =3D "ens211", + .part_id =3D ENS211, + .conv_time_msec =3D 32, +}; + +static const struct ens210_chip_info ens212_chip_info_data =3D { + .name =3D "ens212", + .part_id =3D ENS212, + .conv_time_msec =3D 32, +}; + +static const struct ens210_chip_info ens213a_chip_info_data =3D { + .name =3D "ens213a", + .part_id =3D ENS213A, + .conv_time_msec =3D 130, +}; + +static const struct ens210_chip_info ens215_chip_info_data =3D { + .name =3D "ens215", + .part_id =3D ENS215, + .conv_time_msec =3D 130, +}; + +static const struct of_device_id ens210_of_match[] =3D { + { .compatible =3D "sciosense,ens210", .data =3D &ens210_chip_info_data}, + { .compatible =3D "sciosense,ens210a", .data =3D &ens210a_chip_info_data = }, + { .compatible =3D "sciosense,ens211", .data =3D &ens211_chip_info_data}, + { .compatible =3D "sciosense,ens212", .data =3D &ens212_chip_info_data}, + { .compatible =3D "sciosense,ens213a", .data =3D &ens213a_chip_info_data = }, + { .compatible =3D "sciosense,ens215", .data =3D &ens215_chip_info_data }, + {} +}; +MODULE_DEVICE_TABLE(of, ens210_of_match); + +static const struct i2c_device_id ens210_id_table[] =3D { + { "ens210", (kernel_ulong_t)&ens210_chip_info_data }, + { "ens210a", (kernel_ulong_t)&ens210a_chip_info_data }, + { "ens211", (kernel_ulong_t)&ens211_chip_info_data }, + { "ens212", (kernel_ulong_t)&ens212_chip_info_data }, + { "ens213a", (kernel_ulong_t)&ens213a_chip_info_data }, + { "ens215", (kernel_ulong_t)&ens215_chip_info_data }, + {} +}; +MODULE_DEVICE_TABLE(i2c, ens210_id_table); + +static struct i2c_driver ens210_driver =3D { + .probe =3D ens210_probe, + .id_table =3D ens210_id_table, + .driver =3D { + .name =3D "ens210", + .of_match_table =3D ens210_of_match, + }, +}; + +module_i2c_driver(ens210_driver); + +MODULE_DESCRIPTION("ScioSense ENS210 temperature and humidity sensor drive= r"); +MODULE_AUTHOR("Joshua Felmeden "); +MODULE_LICENSE("GPL"); --=20 2.39.2