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build: dts: also look for application specific dts overlay

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Not all DTS changes are board specific and we should support overlays
that can be used with multiple boards. For example with a sensor, for
example:

Use this overlay for a sensor:

	&arduino_i2c {
		bme280@76 {
			compatible = "bosch,bme280";
			reg = <0x76>;
			label = "BME280";
		};
	};

This will work with any board that has &arduino_i2c defined, but should
also work if you specify the instance directly (&i2c0 or &i2c1).

Signed-off-by: Anas Nashif <anas.nashif@intel.com>
This commit is contained in:
Anas Nashif 2019-06-15 07:21:13 -04:00
commit d6426226cb
1 changed files with 2 additions and 0 deletions
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2
cmake/app/boilerplate.cmake
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@ -397,6 +397,8 @@ elseif(DEFINED ENV{DTC_OVERLAY_FILE})
set(DTC_OVERLAY_FILE $ENV{DTC_OVERLAY_FILE}) set(DTC_OVERLAY_FILE $ENV{DTC_OVERLAY_FILE})
elseif(EXISTS ${APPLICATION_SOURCE_DIR}/${BOARD}.overlay) elseif(EXISTS ${APPLICATION_SOURCE_DIR}/${BOARD}.overlay)
set(DTC_OVERLAY_FILE ${APPLICATION_SOURCE_DIR}/${BOARD}.overlay) set(DTC_OVERLAY_FILE ${APPLICATION_SOURCE_DIR}/${BOARD}.overlay)
elseif(EXISTS ${APPLICATION_SOURCE_DIR}/app.overlay)
set(DTC_OVERLAY_FILE ${APPLICATION_SOURCE_DIR}/app.overlay)
endif() endif()
set(DTC_OVERLAY_FILE ${DTC_OVERLAY_FILE} CACHE STRING "If desired, you can \ set(DTC_OVERLAY_FILE ${DTC_OVERLAY_FILE} CACHE STRING "If desired, you can \