| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-ID: <20250612100758.13241-3-surajsonawane0215@gmail.com>
Date: Thu, 12 Jun 2025 15:37:45 +0530
From: surajsonawane0215@...il.com
To: Jonathan Cameron <jic23@...nel.org>
Cc: David Lechner <dlechner@...libre.com>,
Nuno Sá <nuno.sa@...log.com>,
Andy Shevchenko <andy@...nel.org>,
Rob Herring <robh@...nel.org>,
Krzysztof Kozlowski <krzk+dt@...nel.org>,
Conor Dooley <conor+dt@...nel.org>,
linux-iio@...r.kernel.org,
devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org,
surajsonawane0215@...il.com
Subject: [PATCH v2 2/3] dt-bindings: iio: chemical: Add sharp,gp2y1010au0f
From: Suraj Sonawane <surajsonawane0215@...il.com>
Add device tree bindings for Sharp GP2Y1010AU0F optical dust sensor.
The sensor measures particulate matter concentration via infrared
scattering with pulsed LED illumination and analog output.
Datasheet: https://global.sharp/products/device/lineup/data/pdf/datasheet/gp2y1010au_appl_e.pdf
Signed-off-by: Suraj Sonawane <surajsonawane0215@...il.com>
---
V1: https://lore.kernel.org/lkml/20250425215149.49068-1-surajsonawane0215@gmail.com/
V2:
- Updated timing properties to match datasheet exactly
- Added reg property for multi-sensor support
.../iio/chemical/sharp,gp2y1010au0f.yaml | 78 +++++++++++++++++++
1 file changed, 78 insertions(+)
create mode 100644 Documentation/devicetree/bindings/iio/chemical/sharp,gp2y1010au0f.yaml
diff --git a/Documentation/devicetree/bindings/iio/chemical/sharp,gp2y1010au0f.yaml b/Documentation/devicetree/bindings/iio/chemical/sharp,gp2y1010au0f.yaml
new file mode 100644
index 000000000..b4e5110d0
--- /dev/null
+++ b/Documentation/devicetree/bindings/iio/chemical/sharp,gp2y1010au0f.yaml
@@ -0,0 +1,78 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iio/chemical/sharp,gp2y1010au0f.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Sharp GP2Y1010AU0F Optical Dust Sensor
+
+maintainers:
+ - Suraj Sonawane <surajsonawane0215@...il.com>
+
+description: |
+ Optical dust sensor measuring particulate matter concentration via infrared scattering.
+ Requires ADC for analog output and GPIO for pulsed LED control with strict timing.
+ Datasheet: https://global.sharp/products/device/lineup/data/pdf/datasheet/gp2y1010au_appl_e.pdf
+
+properties:
+ compatible:
+ const: sharp,gp2y1010au0f
+
+ reg:
+ maxItems: 1
+
+ vdd-supply: true
+
+ led-gpios:
+ description: GPIO connected to the sensor's LED control pin (V-LED)
+ maxItems: 1
+
+ io-channels:
+ description: ADC channel connected to the sensor's analog output (Vo)
+ maxItems: 1
+
+ io-channel-names:
+ const: dust
+
+ sharp,led-on-delay-us:
+ description: |
+ Delay in microseconds after turning the LED ON before reading ADC.
+ The datasheet recommends 280µs after LED ON for accurate measurement.
+ (See Section 6-1 of the datasheet: Sampling timing = 0.28ms)
+
+ default: 280
+ minimum: 0
+ maximum: 320
+
+ sharp,measurement-window-us:
+ description: |
+ Duration in microseconds the LED remains ON for measurement.
+ The recommended pulse width is 320µs ±20µs. (See Section 6-1)
+
+ default: 320
+ minimum: 300
+ maximum: 340
+
+required:
+ - compatible
+ - reg
+ - led-gpios
+ - io-channels
+ - io-channel-names
+
+additionalProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/gpio/gpio.h>
+
+ dust_sensor {
+ compatible = "sharp,gp2y1010au0f";
+ reg = <0>;
+ vdd-supply = <&vcc>;
+ led-gpios = <&gpio 44 GPIO_ACTIVE_HIGH>;
+ io-channels = <&adc 0>;
+ io-channel-names = "dust";
+ sharp,led-on-delay-us = <280>;
+ sharp,measurement-window-us = <320>;
+ };
--
2.43.0
Powered by blists - more mailing lists