From da4472d8f09a2cd66ca2ffb05fdbdc1e3e0c3d52 Mon Sep 17 00:00:00 2001
From: "steve.jeong" <jkhpro1003@gmail.com>
Date: Tue, 14 Jun 2022 14:23:18 +0900
Subject: [PATCH] ODROID-M1: dtb/dtbo: Add mcp2515 (can module)

Support mcp2515 12M clk and 16M clk.

solved the one-bit time that came out twice as long

Signed-off-by: Steve Jeong <how2soft@gmail.com>
Signed-off-by: Dongjin Kim <tobetter@gmail.com>
Change-Id: I47a405f11cdf290deacb9fa266d31525d80cacfc
---
 .../dts/rockchip/overlays/odroidm1/Makefile   |  3 ++
 .../rockchip/overlays/odroidm1/mcp2515.dts    | 14 +++++
 .../rockchip/overlays/odroidm1/mcp2515.dtsi   | 52 +++++++++++++++++++
 .../overlays/odroidm1/mcp2515_12mhz.dts       | 14 +++++
 .../overlays/odroidm1/mcp2515_16mhz.dts       | 14 +++++
 .../boot/dts/rockchip/rk3568-odroid.dtsi      |  8 +++
 6 files changed, 105 insertions(+)
 create mode 100644 arch/arm64/boot/dts/rockchip/overlays/odroidm1/mcp2515.dts
 create mode 100644 arch/arm64/boot/dts/rockchip/overlays/odroidm1/mcp2515.dtsi
 create mode 100644 arch/arm64/boot/dts/rockchip/overlays/odroidm1/mcp2515_12mhz.dts
 create mode 100644 arch/arm64/boot/dts/rockchip/overlays/odroidm1/mcp2515_16mhz.dts

diff --git a/arch/arm64/boot/dts/rockchip/overlays/odroidm1/Makefile b/arch/arm64/boot/dts/rockchip/overlays/odroidm1/Makefile
index b38c1dd6da1b..6ddd0ef96cdb 100644
--- a/arch/arm64/boot/dts/rockchip/overlays/odroidm1/Makefile
+++ b/arch/arm64/boot/dts/rockchip/overlays/odroidm1/Makefile
@@ -5,6 +5,9 @@ dtbo-$(CONFIG_ARCH_ROCKCHIP_ODROIDM1) += \
 	dht11.dtbo \
 	i2c0.dtbo \
 	i2c1.dtbo \
+	mcp2515.dtbo \
+	mcp2515_12mhz.dtbo \
+	mcp2515_16mhz.dtbo \
 	onewire.dtbo \
 	pwm1.dtbo \
 	pwm2.dtbo \
diff --git a/arch/arm64/boot/dts/rockchip/overlays/odroidm1/mcp2515.dts b/arch/arm64/boot/dts/rockchip/overlays/odroidm1/mcp2515.dts
new file mode 100644
index 000000000000..f0cc4bd6e54f
--- /dev/null
+++ b/arch/arm64/boot/dts/rockchip/overlays/odroidm1/mcp2515.dts
@@ -0,0 +1,14 @@
+/dts-v1/;
+/plugin/;
+
+#include "mcp2515.dtsi"
+
+/ {
+	fragment@1 {
+		__overlay__ {
+			can0_clk: can0_clk {
+				clock-frequency = <8000000>;
+			};
+		};
+	};
+};
diff --git a/arch/arm64/boot/dts/rockchip/overlays/odroidm1/mcp2515.dtsi b/arch/arm64/boot/dts/rockchip/overlays/odroidm1/mcp2515.dtsi
new file mode 100644
index 000000000000..546e8d494d78
--- /dev/null
+++ b/arch/arm64/boot/dts/rockchip/overlays/odroidm1/mcp2515.dtsi
@@ -0,0 +1,52 @@
+/dts-v1/;
+/plugin/;
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/pinctrl/rockchip.h>
+#include <dt-bindings/interrupt-controller/irq.h>
+
+/ {
+	fragment@0 {
+		target = <&spi0>;
+
+		__overlay__ {
+			num_chipselect = <1>;
+			cs-gpios = <&gpio3 RK_PD2 GPIO_ACTIVE_LOW>;
+		};
+	};
+
+	fragment@1 {
+		target-path = "/";
+
+		__overlay__ {
+			can0_clk: can0_clk {
+				compatible = "fixed-clock";
+				#clock-cells = <0>;
+				clock-frequency = <8000000>;
+			};
+		};
+	};
+
+	fragment@2 {
+		target = <&spi0>;
+
+		__overlay__ {
+			/* needed to avoid dtc warning */
+		        status = "okay";
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			mcp2515: can@0 {
+				compatible = "microchip,mcp2515";
+				pinctrl-names = "default";
+				pinctrl-0 = <&mcp2515_int_pins>;
+				reg = <0>;
+				clocks = <&can0_clk>;
+				interrupt-parent = <&gpio0>;
+				interrupts = <RK_PC0 IRQ_TYPE_EDGE_FALLING>;
+				spi-max-frequency = <10000000>;
+				status = "okay";
+			};
+		};
+	};
+};
diff --git a/arch/arm64/boot/dts/rockchip/overlays/odroidm1/mcp2515_12mhz.dts b/arch/arm64/boot/dts/rockchip/overlays/odroidm1/mcp2515_12mhz.dts
new file mode 100644
index 000000000000..adbf3c1c2c2c
--- /dev/null
+++ b/arch/arm64/boot/dts/rockchip/overlays/odroidm1/mcp2515_12mhz.dts
@@ -0,0 +1,14 @@
+/dts-v1/;
+/plugin/;
+
+#include "mcp2515.dtsi"
+
+/ {
+	fragment@1 {
+		__overlay__ {
+			can0_clk: can0_clk {
+				clock-frequency = <12000000>;
+			};
+		};
+	};
+};
diff --git a/arch/arm64/boot/dts/rockchip/overlays/odroidm1/mcp2515_16mhz.dts b/arch/arm64/boot/dts/rockchip/overlays/odroidm1/mcp2515_16mhz.dts
new file mode 100644
index 000000000000..dfaf880f05d8
--- /dev/null
+++ b/arch/arm64/boot/dts/rockchip/overlays/odroidm1/mcp2515_16mhz.dts
@@ -0,0 +1,14 @@
+/dts-v1/;
+/plugin/;
+
+#include "mcp2515.dtsi"
+
+/ {
+	fragment@1 {
+		__overlay__ {
+			can0_clk: can0_clk {
+				clock-frequency = <16000000>;
+			};
+		};
+	};
+};
diff --git a/arch/arm64/boot/dts/rockchip/rk3568-odroid.dtsi b/arch/arm64/boot/dts/rockchip/rk3568-odroid.dtsi
index 1d88517975af..8138b84d7842 100644
--- a/arch/arm64/boot/dts/rockchip/rk3568-odroid.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk3568-odroid.dtsi
@@ -88,6 +88,14 @@
 	};
 };
 
+&pinctrl {
+	can_pins {
+		mcp2515_int_pins: mcp2515_int_pins {
+			rockchip,pins = <0 RK_PC0 RK_FUNC_GPIO &pcfg_pull_none>;
+		};
+	};
+};
+
 &pinctrl {
 	/delete-node/ mxc6655xa;
 	/delete-node/ touch;