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Thu, 20 Aug 2026 07:32:31 -0700 (PDT) From: =?UTF-8?q?Nicol=C3=A1s=20Antinori?= To: Jonathan Cameron Cc: =?UTF-8?q?Nicol=C3=A1s=20Antinori?= , Andy Shevchenko , Brigham Campbell , Conor Dooley , David Lechner , Jori Koolstra , Krzysztof Kozlowski , Marcelo Schmitt , =?UTF-8?q?Nuno=20S=C3=A1?= , Rob Herring , Shuah Khan , devicetree@vger.kernel.org, linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kernel-mentees@lists.linux.dev, Krzysztof Kozlowski Subject: [PATCH v4 1/2] dt-bindings: trivial-devices: add Aosong AM2315 and AM2320 chips Date: Thu, 20 Aug 2026 11:31:09 -0300 Message-ID: <355f97d79939b0fee740f91e0d4a74b484639092.1786973355.git.nico.antinori.7@gmail.com> X-Mailer: git-send-email 2.47.3 In-Reply-To: References: 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 Aosong AM2315 and AM2320 are temperature and humidity sensors that do not require configuration. Acked-by: Krzysztof Kozlowski Signed-off-by: Nicol=C3=A1s Antinori --- Documentation/devicetree/bindings/trivial-devices.yaml | 2 ++ 1 file changed, 2 insertions(+) diff --git a/Documentation/devicetree/bindings/trivial-devices.yaml b/Docum= entation/devicetree/bindings/trivial-devices.yaml index 435c4baab436..92b757579eef 100644 --- a/Documentation/devicetree/bindings/trivial-devices.yaml +++ b/Documentation/devicetree/bindings/trivial-devices.yaml @@ -62,6 +62,8 @@ properties: # Aosong temperature & humidity sensors with I2C interface - aosong,aht10 - aosong,aht20 + - aosong,am2315 + - aosong,am2320 - aosong,dht20 # Arduino microcontroller interface over SPI on UnoQ board - arduino,unoq-mcu -- 2.47.3 From nobody Mon Sep 28 15:33:55 2026 Received: from mail-vk1-f169.google.com (mail-vk1-f169.google.com [209.85.221.169]) (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 AAB86358387 for ; 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charset="utf-8" Content-Transfer-Encoding: quoted-printable The AM2320 design is fully compatible with AM2315 in terms of I2C communication protocol and measurement conversions. Add the "am2320" entry to the i2c_device_id table and register a of_device_id table to match against devices declared in device tree. Reviewed-by: Marcelo Schmitt Reviewed-by: Andy Shevchenko Signed-off-by: Nicol=C3=A1s Antinori --- drivers/iio/humidity/Kconfig | 8 +++++--- drivers/iio/humidity/am2315.c | 34 +++++++++++++++++++++++++++++----- 2 files changed, 34 insertions(+), 8 deletions(-) diff --git a/drivers/iio/humidity/Kconfig b/drivers/iio/humidity/Kconfig index 54f11f000b6f..13e267943f67 100644 --- a/drivers/iio/humidity/Kconfig +++ b/drivers/iio/humidity/Kconfig @@ -5,13 +5,15 @@ menu "Humidity sensors" config AM2315 - tristate "Aosong AM2315 relative humidity and temperature sensor" + tristate "Aosong AM2315 and similar relative humidity and temperature sen= sor" depends on I2C select IIO_BUFFER select IIO_TRIGGERED_BUFFER help - If you say yes here you get support for the Aosong AM2315 - relative humidity and ambient temperature sensor. + If you say yes here you get support for the Aosong relative + humidity and ambient temperature sensors: + - AM2315 + - AM2320 This driver can also be built as a module. If so, the module will be called am2315. diff --git a/drivers/iio/humidity/am2315.c b/drivers/iio/humidity/am2315.c index f29baa251f9f..5c7582f3a4f9 100644 --- a/drivers/iio/humidity/am2315.c +++ b/drivers/iio/humidity/am2315.c @@ -1,6 +1,6 @@ // SPDX-License-Identifier: GPL-2.0-only /* - * Aosong AM2315 relative humidity and temperature + * Aosong AM2315 and similar relative humidity and temperature * * Copyright (c) 2016, Intel Corporation. * @@ -27,7 +27,17 @@ #define AM2315_TEMP_OFFSET 4 #define AM2315_ALL_CHANNEL_MASK GENMASK(1, 0) -#define AM2315_DRIVER_NAME "am2315" +struct am2315_chip_info { + const char *name; +}; + +static const struct am2315_chip_info am2315_chip_info =3D { + .name =3D "am2315", +}; + +static const struct am2315_chip_info am2320_chip_info =3D { + .name =3D "am2320", +}; struct am2315_data { struct i2c_client *client; @@ -220,9 +230,14 @@ static const struct iio_info am2315_info =3D { static int am2315_probe(struct i2c_client *client) { int ret; + const struct am2315_chip_info *chip_info; struct iio_dev *indio_dev; struct am2315_data *data; + chip_info =3D i2c_get_match_data(client); + if (!chip_info) + return -ENODATA; + indio_dev =3D devm_iio_device_alloc(&client->dev, sizeof(*data)); if (!indio_dev) return -ENOMEM; @@ -233,7 +248,7 @@ static int am2315_probe(struct i2c_client *client) mutex_init(&data->lock); indio_dev->info =3D &am2315_info; - indio_dev->name =3D AM2315_DRIVER_NAME; + indio_dev->name =3D chip_info->name; indio_dev->modes =3D INDIO_DIRECT_MODE; indio_dev->channels =3D am2315_channels; indio_dev->num_channels =3D ARRAY_SIZE(am2315_channels); @@ -249,8 +264,16 @@ static int am2315_probe(struct i2c_client *client) return devm_iio_device_register(&client->dev, indio_dev); } +static const struct of_device_id am2315_of_match[] =3D { + { .compatible =3D "aosong,am2315", .data =3D &am2315_chip_info }, + { .compatible =3D "aosong,am2320", .data =3D &am2320_chip_info }, + { } +}; +MODULE_DEVICE_TABLE(of, am2315_of_match); + static const struct i2c_device_id am2315_i2c_id[] =3D { - { .name =3D "am2315" }, + { .name =3D "am2315", .driver_data =3D (kernel_ulong_t)&am2315_chip_info = }, + { .name =3D "am2320", .driver_data =3D (kernel_ulong_t)&am2320_chip_info = }, { } }; MODULE_DEVICE_TABLE(i2c, am2315_i2c_id); @@ -258,6 +281,7 @@ MODULE_DEVICE_TABLE(i2c, am2315_i2c_id); static struct i2c_driver am2315_driver =3D { .driver =3D { .name =3D "am2315", + .of_match_table =3D am2315_of_match, }, .probe =3D am2315_probe, .id_table =3D am2315_i2c_id, @@ -266,5 +290,5 @@ static struct i2c_driver am2315_driver =3D { module_i2c_driver(am2315_driver); MODULE_AUTHOR("Tiberiu Breana "); -MODULE_DESCRIPTION("Aosong AM2315 relative humidity and temperature"); +MODULE_DESCRIPTION("Aosong AM2315 and similar relative humidity and temper= ature"); MODULE_LICENSE("GPL v2"); -- 2.47.3