4.20-stable review patch. If anyone has any objections, please let me know. ------------------ From: Paul Burton <paul.burton@xxxxxxxx> commit 047f2d941b8b24cadd6a4a09e606b7f41188ba3e upstream. DTC introduced an i2c_bus_reg check in v1.4.7, used since Linux v4.20, which complains about upper case addresses used in the unit name. nexys4ddr.dts names an I2C device node "ad7420@4B", leading to: arch/mips/boot/dts/xilfpga/nexys4ddr.dts:109.16-112.8: Warning (i2c_bus_reg): /i2c@10A00000/ad7420@4B: I2C bus unit address format error, expected "4b" Fix this by switching to lower case addresses throughout the file, as is *mostly* the case in the file already & fairly standard throughout the tree. Signed-off-by: Paul Burton <paul.burton@xxxxxxxx> Cc: stable@xxxxxxxxxxxxxxx # v4.20+ Cc: linux-mips@xxxxxxxxxxxxxxx Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- arch/mips/boot/dts/xilfpga/nexys4ddr.dts | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) --- a/arch/mips/boot/dts/xilfpga/nexys4ddr.dts +++ b/arch/mips/boot/dts/xilfpga/nexys4ddr.dts @@ -90,11 +90,11 @@ interrupts = <0>; }; - axi_i2c: i2c@10A00000 { + axi_i2c: i2c@10a00000 { compatible = "xlnx,xps-iic-2.00.a"; interrupt-parent = <&axi_intc>; interrupts = <4>; - reg = < 0x10A00000 0x10000 >; + reg = < 0x10a00000 0x10000 >; clocks = <&ext>; xlnx,clk-freq = <0x5f5e100>; xlnx,family = "Artix7"; @@ -106,9 +106,9 @@ #address-cells = <1>; #size-cells = <0>; - ad7420@4B { + ad7420@4b { compatible = "adi,adt7420"; - reg = <0x4B>; + reg = <0x4b>; }; } ; };