quoted

+  samsung,sysreg:
+    $ref: '/schemas/types.yaml#/definitions/phandle'
+    description: phandle for FSYSx sysreg interface, used to control
+                 sysreg register bit for UFS IO Coherency
+
+  samsung,ufs-shareability-reg-offset:
+    $ref: '/schemas/types.yaml#/definitions/uint32'
+    description: Offset to the shareability register for io-coherency

Make these a single property: <phandle offset>

As I already mentioned previous e-mail [1], I need to support two ufs
instances for exynosauto v9 soc.

syscon_fsys2: syscon@17c20000 {
	compatible = "samsung,exynosautov9-sysreg", "syscon";
	reg = <0x17c20000 0x1000>;
};

ufs_0: ufs0@17e00000 {
	<snip>
	samsung,sysreg = <&syscon_fsys2>;
	samsung,ufs-shareability-reg-offset = <0x710>;
};

To be added ufs_1 like below
ufs_1: ufs0@17f00000 {
	<snip>
	samsung,sysreg = <&syscon_fsys2>;
	samsung,ufs-shareability-reg-offset = <0x714>;
};

[1]:
https://lore.kernel.org/linux-scsi/000901d7b0e0$e618b220$b24a1660$@samsung.c
om/

If you prefer them to be separated sysreg phandles which directly pointing
the register, I'm able to change it.
But, the syscon_fsys2 can be used for other IPs as well such as ethernet.

Best Regards,
Chanho Park