The compatible string isl,isl12022 is typo, it should be isil,isl12022.
Fix below CHECK_DTBS warning:
arch/arm/boot/dts/nxp/imx/imx6dl-ts7970.dtb: /soc/bus@2100000/i2c@21a0000/rtc@6f: failed to match any schema with compatible: ['isl,isl12022']

Signed-off-by: Frank Li <Frank.Li@nxp.com>
---
 arch/arm/boot/dts/nxp/imx/imx6qdl-ts7970.dtsi | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/nxp/imx/imx6qdl-ts7970.dtsi b/arch/arm/boot/dts/nxp/imx/imx6qdl-ts7970.dtsi
index 11c70431feec902ef76a67d1ea02d2af5d467b68..2e8573dac39e86f408a45da3c013e67e96c02fc9 100644
--- a/arch/arm/boot/dts/nxp/imx/imx6qdl-ts7970.dtsi
+++ b/arch/arm/boot/dts/nxp/imx/imx6qdl-ts7970.dtsi
@@ -218,7 +218,7 @@ m41t00s: rtc@68 {
 	};
 
 	isl12022: rtc@6f {
-		compatible = "isl,isl12022";
+		compatible = "isil,isl12022";
 		reg = <0x6f>;
 	};
 

-- 
2.34.1