Merge pull request #1017 from P33M/rpi-4.0.y

Add overlays for the DHT11 sensor
raspberrypi · Jun 10, 2015 · 5cc3907 · 5cc3907
2 parents dc48d12 + b9a6733
commit 5cc3907
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diff --git a/arch/arm/boot/dts/overlays/Makefile b/arch/arm/boot/dts/overlays/Makefile
@@ -14,6 +14,7 @@ endif
 
 dtb-$(RPI_DT_OVERLAYS) += ads7846-overlay.dtb
 dtb-$(RPI_DT_OVERLAYS) += bmp085_i2c-sensor-overlay.dtb
+dtb-$(RPI_DT_OVERLAYS) += dht11-overlay.dtb
 dtb-$(RPI_DT_OVERLAYS) += enc28j60-overlay.dtb
 dtb-$(RPI_DT_OVERLAYS) += hifiberry-amp-overlay.dtb
 dtb-$(RPI_DT_OVERLAYS) += hifiberry-dac-overlay.dtb

diff --git a/arch/arm/boot/dts/overlays/dht11-overlay.dts b/arch/arm/boot/dts/overlays/dht11-overlay.dts
@@ -0,0 +1,39 @@
+/*
+ * Overlay for the DHT11/21/22 humidity/temperature sensor modules.
+ */
+/dts-v1/;
+/plugin/;
+
+/ {
+	compatible = "brcm,bcm2708";
+
+	fragment@0 {
+		target-path = "/";
+		__overlay__ {
+
+			dht11: dht11@0 {
+				compatible = "dht11";
+				pinctrl-names = "default";
+				pinctrl-0 = <&dht11_pins>;
+				gpios = <&gpio 4 0>;
+				status = "okay";
+			};
+		};
+	};
+
+	fragment@1 {
+		target = <&gpio>;
+		__overlay__ {
+			dht11_pins: dht11_pins {
+				brcm,pins = <4>;
+				brcm,function = <0>; // in
+				brcm,pull = <0>; // off
+			};
+		};
+	};
+
+	__overrides__ {
+		gpiopin = <&dht11_pins>,"brcm,pins:0",
+			<&dht11>,"gpios:4";
+	};
+};
diff --git a/arch/arm/configs/bcm2709_defconfig b/arch/arm/configs/bcm2709_defconfig
@@ -1061,6 +1061,11 @@ CONFIG_BCM2708_MBOX=y
 # CONFIG_IOMMU_SUPPORT is not set
 CONFIG_EXTCON=m
 CONFIG_EXTCON_ARIZONA=m
+CONFIG_IIO=m
+CONFIG_IIO_BUFFER=y
+CONFIG_IIO_BUFFER_CB=y
+CONFIG_IIO_KFIFO_BUF=m
+CONFIG_DHT11=m
 CONFIG_EXT4_FS=y
 CONFIG_EXT4_FS_POSIX_ACL=y
 CONFIG_EXT4_FS_SECURITY=y

diff --git a/arch/arm/configs/bcmrpi_defconfig b/arch/arm/configs/bcmrpi_defconfig
@@ -1054,6 +1054,11 @@ CONFIG_BCM2708_MBOX=y
 # CONFIG_IOMMU_SUPPORT is not set
 CONFIG_EXTCON=m
 CONFIG_EXTCON_ARIZONA=m
+CONFIG_IIO=m
+CONFIG_IIO_BUFFER=y
+CONFIG_IIO_BUFFER_CB=y
+CONFIG_IIO_KFIFO_BUF=m
+CONFIG_DHT11=m
 CONFIG_EXT4_FS=y
 CONFIG_EXT4_FS_POSIX_ACL=y
 CONFIG_EXT4_FS_SECURITY=y