Per fsl-imx-sahara.yaml, there should not be a 'fsl,imx51-sahara' compatible. Remove it to fix the following schema warning: imx51-apf51.dtb: crypto@83ff8000: compatible: ['fsl,imx53-sahara', 'fsl,imx51-sahara'] is too long from schema $id: http://devicetree.org/schemas/crypto/fsl-imx-sahara.yaml# Signed-off-by: Fabio Estevam <festevam@denx.de> Signed-off-by: Shawn Guo <shawnguo@kernel.org>