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([120.242.225.43]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-826dd47c737sm7873090b3a.0.2026.02.23.09.41.39 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 23 Feb 2026 09:41:41 -0800 (PST) From: Hao Yu To: krzk@kernel.org Cc: akhilesh@ee.iitb.ac.in, conor+dt@kernel.org, devicetree@vger.kernel.org, haoyufine@gmail.com, jcdra1@gmail.com, krzk+dt@kernel.org, linux-hwmon@vger.kernel.org, linux-kernel@vger.kernel.org, linux@roeck-us.net, robh@kernel.org Subject: [PATCH v3 1/2] dt-bindings: hwmon: add Aosong AHT10/AHT20/DHT20 to trivial devices Date: Tue, 24 Feb 2026 01:38:52 +0800 Message-Id: <20260223173853.30617-2-haoyufine@gmail.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260222105831.7360-1-haoyufine@gmail.com> References: <20260222105831.7360-1-haoyufine@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Add Aosong AHT10, AHT20 and DHT20 temperature and humidity sensors to the trivial-devices documentation. These sensors use a standard I2C interface and do not require complex binding definitions. Signed-off-by: Hao Yu Acked-by: Krzysztof Kozlowski --- Documentation/devicetree/bindings/trivial-devices.yaml | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/Documentation/devicetree/bindings/trivial-devices.yaml b/Docum= entation/devicetree/bindings/trivial-devices.yaml index a482aeadcd44..aa924a410fc3 100644 --- a/Documentation/devicetree/bindings/trivial-devices.yaml +++ b/Documentation/devicetree/bindings/trivial-devices.yaml @@ -59,6 +59,10 @@ properties: - adi,lt7182s # AMS iAQ-Core VOC Sensor - ams,iaq-core + # Aosong temperature & humidity sensors with I2C interface + - aosong,aht10 + - aosong,aht20 + - aosong,dht20 # Arduino microcontroller interface over SPI on UnoQ board - arduino,unoq-mcu # Temperature monitoring of Astera Labs PT5161L PCIe retimer --=20 2.34.1 From nobody Fri Apr 17 07:44:19 2026 Received: from mail-pl1-f196.google.com (mail-pl1-f196.google.com [209.85.214.196]) (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 3E0AA1E9B3F for ; Sun, 22 Feb 2026 10:59:35 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.196 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771757976; cv=none; b=uUAdJGXLkURWPaErwrOXXQ2AUWn9HC0ooEQyOXKvF271pzgVcwuCzyL/ubydOfuGIVwP4+lvENVih4SlQTlCCUjtaytdMmokiPcPkS+RhxtNsLMFdlsXvfxzWzNnGICCZiTMPYiFji5LOyskTuctHDG9BLV4vZxQku43HKZN83Q= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771757976; c=relaxed/simple; bh=cKB8GdjBiTI1IH3d5kRntsZzu1jt3bsi1XrHNbXVwYo=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=mQ7Qb6dT/B4PnxkPNsWVuNCsbiCuhcUqk+xylao6gc42t0CJWCAeAq2g5VdhJRbsITHGH522geOYnvKUK7exUJECX5z4dafofvZ5XXG9VgjCVp9pfh/dLVUagWoaBVbFk0kYwg9Mbg/xlQtwXEmieJHdbzIUIAj+LH7K/6N8NOc= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=N9fRwPiz; arc=none smtp.client-ip=209.85.214.196 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="N9fRwPiz" Received: by mail-pl1-f196.google.com with SMTP id d9443c01a7336-2aaf43014d0so24172325ad.2 for ; Sun, 22 Feb 2026 02:59:35 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1771757975; x=1772362775; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=k2pXf2JxN266dHpR5OZsunhHp7ZZzd2jqbxxjf9ZQK8=; b=N9fRwPizSoTwfLpdpp8+eUZoDN25RB1h6eEvrXgmp01VXAsUCyPjvQJARQe9rAaJXL e7nNSsIhpnGW9s8JR2AMVW2SmCEjQKeaj+2bzLs6R1G7SlUB1nspo25LJAxaWGNL6y0U W0tNIbCx+Pr0B7f4fn7s0iun7SobDk+hlnLw1yoTNoZUwEQ0AltIb917tJMcK4+R9QBX PIaf8Ljy8RQqNT6gp5K+oRQYPJKmKeO7piivsBuQTjre/qr+4ELncPgHg3OyvmqNSIY0 Sw8uoebp9+I1JlJg+9hbKT/PBYbAe4rdqJrrYC0Eksevb8Jd2xKdIbhUFQEjoZZIwRk9 eghw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1771757975; x=1772362775; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=k2pXf2JxN266dHpR5OZsunhHp7ZZzd2jqbxxjf9ZQK8=; b=Bc9U/lH8iiaf9skqQBqescq9IFxoXD+RjAhMSJjETTLigCKby0rLbHFyPulSaZVM6y alvo45xndiCTqNv7fop5Fk5TVBrwWyg0oltmUJcpDz8FzIp8ymp268CmVaCsFMaBPuHW vSEmAWVSZqhih2O7V2ihEjVSp0dvOs3QJ0EMJsicX0D1nCcSJea9vFi0vLC3HQkEJ5u0 a1xksGbK8mNaqpRFnMYIUhlrmP43UjICCuMvF2KQ8KXaW5FuYUMV7pdyRhSePotHK/pd 3kZrw+dimXN4sjwr7QBfNRc9tJzQivnaEra2z+F0MIl5gRkXVF/Endp4lCkAhxTYdDRo l+UQ== X-Forwarded-Encrypted: i=1; AJvYcCWDiIR4om6mgnUUID+kv7qpXPlqSPMIix8JAU1z/eIqlF5BPYopA6RVOHz/bisQzugSvule2z5mxTSDAro=@vger.kernel.org X-Gm-Message-State: AOJu0Yz3F05R7rz6e3Vjg4EP3+bvr7wAxnxkQIU84bL3FZ7wrGZub3TW IL2j1ht3gJ0oKp7q86TIYr1oD+OGjZhua+aO0CLVduAXjpMRT1Ur5WkS X-Gm-Gg: AZuq6aLVos0Mj5U2ck/gHxAUUP9tR8K9lCaUZ3OC0Ah3+MJ8aGowCrw0cUAnrKGNR+e 1iWOuDD2HbdUzxIBVPxjUDxwSk+4DIHPQwrzY+XOxiJ+USsEICZFtyqRxFj8PiR0Ss+EtMdhvDc 6yQsHXAAKY3wWGl0pKgggRtsFSri3f5IKjomQx99GZGABidp4MKlWF9NQZeVJFOG8NLzTQZXKfs hKkRJXqSGxEZRhoBXr447stQKNw5I660YjytHttERqmqM6GKadMV8MyKEFW7NNdQkXzu5jT2FTD SYoe0p7kC3Jp0O1tuAXFG9Bi/2eW6jIUpmhn6qUt+JIMzGvFfqp1TW7sqIeOMpPFp+gsdquYoGH o8wVa0nyZ9AkMgMRiZiDrdPd8Pyw98Jab4frkriwJE1LkNeuHoSSb9CsO1VYOm5yOZ7+STxx1CD oMUqcCXZuxIljHzsle X-Received: by 2002:a17:902:dac5:b0:2aa:dcc0:36d with SMTP id d9443c01a7336-2ad744d7624mr62163275ad.29.1771757974632; Sun, 22 Feb 2026 02:59:34 -0800 (PST) Received: from yu.. ([120.242.225.43]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-358a1b1f84fsm3705278a91.2.2026.02.22.02.59.32 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 22 Feb 2026 02:59:34 -0800 (PST) From: Hao Yu To: linux@roeck-us.net, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org Cc: jcdra1@gmail.com, akhilesh@ee.iitb.ac.in, linux-hwmon@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Hao Yu Subject: [PATCH 1/2] dt-bindings: hwmon: add aosong,aht10 family Date: Sun, 22 Feb 2026 18:58:30 +0800 Message-Id: <20260222105831.7360-2-haoyufine@gmail.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260222105831.7360-1-haoyufine@gmail.com> References: <20260222105831.7360-1-haoyufine@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Add Aosong AHT10, AHT20, and DHT20 humidity and temperature sensors. Signed-off-by: Hao Yu --- .../bindings/hwmon/aosong,aht10.yaml | 41 +++++++++++++++++++ 1 file changed, 41 insertions(+) create mode 100644 Documentation/devicetree/bindings/hwmon/aosong,aht10.ya= ml diff --git a/Documentation/devicetree/bindings/hwmon/aosong,aht10.yaml b/Do= cumentation/devicetree/bindings/hwmon/aosong,aht10.yaml new file mode 100644 index 000000000000..6eb3944ae3da --- /dev/null +++ b/Documentation/devicetree/bindings/hwmon/aosong,aht10.yaml @@ -0,0 +1,41 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/hwmon/aosong,aht10.yaml# +$schema: http://devicetree.org/meta-schema.yaml# + +title: Aosong AHT10/AHT20/DHT20 Temperature and Humidity Sensor + +maintainers: + - Hao Yu + +description: | + The Aosong AHT10, AHT20, and DHT20 are I2C humidity and temperature sens= ors. + +properties: + compatible: + enum: + - aosong,aht10 + - aosong,aht20 + - aosong,dht20 + + reg: + maxItems: 1 + +required: + - compatible + - reg + +additionalProperties: false + +examples: + - | + i2c { + #address-cells =3D <1>; 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([120.242.225.43]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-826dd47c737sm7873090b3a.0.2026.02.23.09.41.42 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 23 Feb 2026 09:41:44 -0800 (PST) From: Hao Yu To: krzk@kernel.org Cc: akhilesh@ee.iitb.ac.in, conor+dt@kernel.org, devicetree@vger.kernel.org, haoyufine@gmail.com, jcdra1@gmail.com, krzk+dt@kernel.org, linux-hwmon@vger.kernel.org, linux-kernel@vger.kernel.org, linux@roeck-us.net, robh@kernel.org Subject: [PATCH v3 2/2] hwmon: (aht10) add device tree ID matching Date: Tue, 24 Feb 2026 01:38:53 +0800 Message-Id: <20260223173853.30617-3-haoyufine@gmail.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260222105831.7360-1-haoyufine@gmail.com> References: <20260222105831.7360-1-haoyufine@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Add of_device_id table to allow the driver to be matched via Device Tree. This is required for supporting the AHT10/20/DHT20 sensors on platforms using DT. Signed-off-by: Hao Yu --- drivers/hwmon/aht10.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/drivers/hwmon/aht10.c b/drivers/hwmon/aht10.c index 007befdba977..cd802dad5eca 100644 --- a/drivers/hwmon/aht10.c +++ b/drivers/hwmon/aht10.c @@ -60,6 +60,15 @@ static const struct i2c_device_id aht10_id[] =3D { }; MODULE_DEVICE_TABLE(i2c, aht10_id); =20 +static const struct of_device_id aht10_of_match[] =3D { + { .compatible =3D "aosong,aht10", .data =3D (void *)aht10 }, + { .compatible =3D "aosong,aht20", .data =3D (void *)aht20 }, + { .compatible =3D "aosong,dht20", .data =3D (void *)dht20 }, + {} +}; + +MODULE_DEVICE_TABLE(of, aht10_of_match); + /** * struct aht10_data - All the data required to operate an AHT10/AHT20 c= hip * @client: the i2c client associated with the AHT10/AHT20 @@ -375,6 +384,7 @@ static int aht10_probe(struct i2c_client *client) static struct i2c_driver aht10_driver =3D { .driver =3D { .name =3D "aht10", + .of_match_table =3D aht10_of_match, }, .probe =3D aht10_probe, .id_table =3D aht10_id, --=20 2.34.1 From nobody Fri Apr 17 07:44:19 2026 Received: from mail-pj1-f67.google.com (mail-pj1-f67.google.com [209.85.216.67]) (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 8CCBB238C1B for ; 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([120.242.225.43]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-358a1b1f84fsm3705278a91.2.2026.02.22.02.59.34 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 22 Feb 2026 02:59:37 -0800 (PST) From: Hao Yu To: linux@roeck-us.net, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org Cc: jcdra1@gmail.com, akhilesh@ee.iitb.ac.in, linux-hwmon@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Hao Yu Subject: [PATCH 2/2] hwmon: (aht10) Fix initialization commands and add DT support Date: Sun, 22 Feb 2026 18:58:31 +0800 Message-Id: <20260222105831.7360-3-haoyufine@gmail.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260222105831.7360-1-haoyufine@gmail.com> References: <20260222105831.7360-1-haoyufine@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Correct AHT20 initialization command sequence and change DHT20 command format to 0bxxxxx notation. Tested on rk3566_lckfb board with aht20 sensor connected at i2c-2 port. Signed-off-by: Hao Yu --- drivers/hwmon/aht10.c | 16 ++++++++++++++-- 1 file changed, 14 insertions(+), 2 deletions(-) diff --git a/drivers/hwmon/aht10.c b/drivers/hwmon/aht10.c index 007befdba977..c18332cc48ba 100644 --- a/drivers/hwmon/aht10.c +++ b/drivers/hwmon/aht10.c @@ -37,7 +37,9 @@ #define AHT10_CMD_MEAS 0b10101100 #define AHT10_CMD_RST 0b10111010 =20 -#define DHT20_CMD_INIT 0x71 +#define AHT20_CMD_INIT 0b10111110 + +#define DHT20_CMD_INIT 0b01110001 =20 /* * Flags in the answer byte/command @@ -60,6 +62,15 @@ static const struct i2c_device_id aht10_id[] =3D { }; MODULE_DEVICE_TABLE(i2c, aht10_id); =20 +static const struct of_device_id aht10_of_match[] =3D { + { .compatible =3D "aosong,aht10", .data =3D (void *)aht10 }, + { .compatible =3D "aosong,aht20", .data =3D (void *)aht20 }, + { .compatible =3D "aosong,dht20", .data =3D (void *)dht20 }, + {} +}; + +MODULE_DEVICE_TABLE(of, aht10_of_match); + /** * struct aht10_data - All the data required to operate an AHT10/AHT20 c= hip * @client: the i2c client associated with the AHT10/AHT20 @@ -341,7 +352,7 @@ static int aht10_probe(struct i2c_client *client) data->meas_size =3D AHT20_MEAS_SIZE; data->crc8 =3D true; crc8_populate_msb(crc8_table, AHT20_CRC8_POLY); - data->init_cmd =3D AHT10_CMD_INIT; + data->init_cmd =3D AHT20_CMD_INIT; break; case dht20: data->meas_size =3D AHT20_MEAS_SIZE; @@ -375,6 +386,7 @@ static int aht10_probe(struct i2c_client *client) static struct i2c_driver aht10_driver =3D { .driver =3D { .name =3D "aht10", + .of_match_table =3D aht10_of_match, }, .probe =3D aht10_probe, .id_table =3D aht10_id, --=20 2.34.1