arm64: dts: renesas: white-hawk: Add CAN-FD support

Enable confirmed-working CAN-FD channels 0 and 1 on the White-Hawk
development board:
  - Channel 0 uses an NXP TJR1443AT CAN transceiver, which must be
    enabled through a GPIO,
  - Channels 1-7 use Microchip MCP2558FD-H/SN CAN transceivers (not
    mounted for channels 4-7), which do not need explicit description,
    but channels 2-3 do not seem to work.

Inspired by a patch in the BSP by Kazuya Mizuguch.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/a19d0a70aacaf4c3517a226bf32ea49db3542da4.1674500205.git.geert+renesas@glider.be

diff --git a/arch/arm64/boot/dts/renesas/r8a779g0-white-hawk.dts b/arch/arm64/boot/dts/renesas/r8a779g0-white-hawk.dts
index 04a2b6b83e743f326c9b88d8c98c915175512254..eff1ef6e2cc83aba94d041996682b3616002c1be 100644 (file)
--- a/arch/arm64/boot/dts/renesas/r8a779g0-white-hawk.dts
+++ b/arch/arm64/boot/dts/renesas/r8a779g0-white-hawk.dts
@@ -13,6 +13,33 @@
 / {
        model = "Renesas White Hawk CPU and Breakout boards based on r8a779g0";
        compatible = "renesas,white-hawk-breakout", "renesas,white-hawk-cpu", "renesas,r8a779g0";
+
+       can_transceiver0: can-phy0 {
+               compatible = "nxp,tjr1443";
+               #phy-cells = <0>;
+               enable-gpios = <&gpio1 3 GPIO_ACTIVE_HIGH>;
+               max-bitrate = <5000000>;
+       };
+};
+
+&can_clk {
+       clock-frequency = <40000000>;
+};
+
+&canfd {
+       pinctrl-0 = <&canfd0_pins>, <&canfd1_pins>, <&can_clk_pins>;
+       pinctrl-names = "default";
+
+       status = "okay";
+
+       channel0 {
+               status = "okay";
+               phys = <&can_transceiver0>;
+       };
+
+       channel1 {
+               status = "okay";
+       };
 };
 
 &i2c0 {
@@ -23,3 +50,20 @@
                pagesize = <8>;
        };
 };
+
+&pfc {
+       can_clk_pins: can-clk {
+               groups = "can_clk";
+               function = "can_clk";
+       };
+
+       canfd0_pins: canfd0 {
+               groups = "canfd0_data";
+               function = "canfd0";
+       };
+
+       canfd1_pins: canfd1 {
+               groups = "canfd1_data";
+               function = "canfd1";
+       };
+};