Declare m2 clock in r8a7793 device tree.
Based on similar work for the r8a7791 by Laurent Pinchart.
Acked-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
                        clock-mult = <1>;
                        clock-output-names = "p";
                };
+               m2_clk: m2_clk {
+                       compatible = "fixed-factor-clock";
+                       clocks = <&cpg_clocks R8A7793_CLK_PLL1>;
+                       #clock-cells = <0>;
+                       clock-div = <8>;
+                       clock-mult = <1>;
+                       clock-output-names = "m2";
+               };
                rclk_clk: rclk_clk {
                        compatible = "fixed-factor-clock";
                        clocks = <&cpg_clocks R8A7793_CLK_PLL1>;