arm64: dts: renesas: r8a77970: add CAN-FD support

Define the generic R8A77970 part of the CAN-FD device node.

Based on the original (and large) patch by Vladimir Barinov.

Signed-off-by: Vladimir Barinov <vladimir.barinov@cogentembedded.com>
Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Acked-by: Ramesh Shanmugasundaram <ramesh.shanmugasundaram@bp.renesas.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

diff --git a/arch/arm64/boot/dts/renesas/r8a77970.dtsi b/arch/arm64/boot/dts/renesas/r8a77970.dtsi
index 6ed2e95..37b843c 100644 (file)
--- a/arch/arm64/boot/dts/renesas/r8a77970.dtsi
+++ b/arch/arm64/boot/dts/renesas/r8a77970.dtsi
@@ -68,6 +68,13 @@
                method = "smc";
        };
 
+       /* External CAN clock - to be overridden by boards that provide it */
+       can_clk: can {
+               compatible = "fixed-clock";
+               #clock-cells = <0>;
+               clock-frequency = <0>;
+       };
+
        /* External SCIF clock - to be overridden by boards that provide it */
        scif_clk: scif {
                compatible = "fixed-clock";
@@ -381,6 +388,31 @@
                        status = "disabled";
                };
 
+               canfd: can@e66c0000 {
+                       compatible = "renesas,r8a77970-canfd",
+                                    "renesas,rcar-gen3-canfd";
+                       reg = <0 0xe66c0000 0 0x8000>;
+                       interrupts = <GIC_SPI 29 IRQ_TYPE_LEVEL_HIGH>,
+                                    <GIC_SPI 30 IRQ_TYPE_LEVEL_HIGH>;
+                       clocks = <&cpg CPG_MOD 914>,
+                                <&cpg CPG_CORE R8A77970_CLK_CANFD>,
+                                <&can_clk>;
+                       clock-names = "fck", "canfd", "can_clk";
+                       assigned-clocks = <&cpg CPG_CORE R8A77970_CLK_CANFD>;
+                       assigned-clock-rates = <40000000>;
+                       power-domains = <&sysc R8A77970_PD_ALWAYS_ON>;
+                       resets = <&cpg 914>;
+                       status = "disabled";
+
+                       channel0 {
+                               status = "disabled";
+                       };
+
+                       channel1 {
+                               status = "disabled";
+                       };
+               };
+
                avb: ethernet@e6800000 {
                        compatible = "renesas,etheravb-r8a77970",
                                     "renesas,etheravb-rcar-gen3";