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diff --git a/target/linux/brcm2708/patches-4.14/950-0274-overlays-Add-ds1621-to-the-i2c-sensor-overlay.patch b/target/linux/brcm2708/patches-4.14/950-0274-overlays-Add-ds1621-to-the-i2c-sensor-overlay.patch
new file mode 100644
index 0000000000..fb0298c52c
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.14/950-0274-overlays-Add-ds1621-to-the-i2c-sensor-overlay.patch
@@ -0,0 +1,97 @@
+From 3c258618cbc0cddb7076b61a08755aa4f73d27db Mon Sep 17 00:00:00 2001
+From: Phil Elwell <phil@raspberrypi.org>
+Date: Sun, 15 Apr 2018 10:36:15 +0100
+Subject: [PATCH 274/454] overlays: Add ds1621 to the i2c-sensor overlay
+
+The ds1621 enables the Dallas Semiconductors DS1621 temperature
+sensor.
+
+See: https://github.com/raspberrypi/linux/issues/2509
+
+Signed-off-by: Phil Elwell <phil@raspberrypi.org>
+---
+ arch/arm/boot/dts/overlays/README | 15 +++++++++------
+ .../boot/dts/overlays/i2c-sensor-overlay.dts | 19 ++++++++++++++++++-
+ 2 files changed, 27 insertions(+), 7 deletions(-)
+
+--- a/arch/arm/boot/dts/overlays/README
++++ b/arch/arm/boot/dts/overlays/README
+@@ -821,8 +821,8 @@ Name: i2c-sensor
+ Info: Adds support for a number of I2C barometric pressure and temperature
+ sensors on i2c_arm
+ Load: dtoverlay=i2c-sensor,<param>=<val>
+-Params: addr Set the address for the BME280, BMP280, TMP102,
+- HDC100X, LM75 or SHT3x
++Params: addr Set the address for the BME280, BMP280, DS1621,
++ HDC100X, LM75, SHT3x or TMP102
+
+ bme280 Select the Bosch Sensortronic BME280
+ Valid addresses 0x76-0x77, default 0x76
+@@ -834,6 +834,9 @@ Params: addr Set the
+ bmp280 Select the Bosch Sensortronic BMP280
+ Valid addresses 0x76-0x77, default 0x76
+
++ ds1621 Select the Dallas Semiconductors DS1621 temp
++ sensor. Valid addresses 0x48-9x4f, default 0x48
++
+ hdc100x Select the Texas Instruments HDC100x temp sensor
+ Valid addresses 0x40-0x43, default 0x40
+
+@@ -844,6 +847,10 @@ Params: addr Set the
+
+ lm75addr Deprecated - use addr parameter instead
+
++ sht3x Select the Sensiron SHT3x temperature and
++ humidity sensor. Valid addresses 0x44-0x45,
++ default 0x44
++
+ si7020 Select the Silicon Labs Si7013/20/21 humidity/
+ temperature sensor
+
+@@ -856,10 +863,6 @@ Params: addr Set the
+ veml6070 Select the Vishay VEML6070 ultraviolet light
+ sensor
+
+- sht3x Select the Sensiron SHT3x temperature and
+- humidity sensor. Valid addresses 0x44-0x45,
+- default 0x44
+-
+
+ Name: i2c0-bcm2708
+ Info: Enable the i2c_bcm2708 driver for the i2c0 bus. Not all pin combinations
+--- a/arch/arm/boot/dts/overlays/i2c-sensor-overlay.dts
++++ b/arch/arm/boot/dts/overlays/i2c-sensor-overlay.dts
+@@ -186,9 +186,25 @@
+ };
+ };
+
++ fragment@12 {
++ target = <&i2c_arm>;
++ __dormant__ {
++ #address-cells = <1>;
++ #size-cells = <0>;
++ status = "okay";
++
++ ds1621: ds1621@48 {
++ compatible = "ds1621";
++ reg = <0x48>;
++ status = "okay";
++ };
++ };
++ };
++
+ __overrides__ {
+ addr = <&bme280>,"reg:0", <&bmp280>,"reg:0", <&tmp102>,"reg:0",
+- <&lm75>,"reg:0", <&hdc100x>,"reg:0", <&sht3x>,"reg:0";
++ <&lm75>,"reg:0", <&hdc100x>,"reg:0", <&sht3x>,"reg:0",
++ <&ds1621>,"reg:0";
+ bme280 = <0>,"+0";
+ bmp085 = <0>,"+1";
+ bmp180 = <0>,"+2";
+@@ -202,5 +218,6 @@
+ tsl4531 = <0>,"+9";
+ veml6070 = <0>,"+10";
+ sht3x = <0>,"+11";
++ ds1621 = <0>,"+12";
+ };
+ };