Get a plain-text file from a generated .dtb:
dtc \
arch/arm64/boot/dts/qcom/msm8996-v3.0-pmi8996-tone-kagura_generic.dtb \
> msm8996-v3.0-pmi8996-tone-kagura_generic-generated.dts
The generated .dts file is in plain-text and can be viewed in a text editor.
More: eLinux: Device Tree Usage.