dt: overlay: added overlay for several variants of mcp25xxfd

This includes overlays for individual can devices
but also support for the quadcan-fd hat

Signed-off-by: Martin Sperl <[email protected]>

Author: msperl

arch/arm/boot/dts/overlays/Makefile

@@ -81,6 +81,10 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
 	mcp23s17.dtbo \
 	mcp2515-can0.dtbo \
 	mcp2515-can1.dtbo \
+	mcp2517fd-spi0.0-can0.dtbo \
+	mcp2517fd-spi0.1-can1.dtbo \
+	mcp2517fd-spi1.0-can2.dtbo \
+	mcp2517fd-spi1.1-can3.dtbo \
 	mcp3008.dtbo \
 	mcp3202.dtbo \
 	mcp342x.dtbo \
@@ -110,6 +114,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
 	pwm-2chan.dtbo \
 	pwm-ir-tx.dtbo \
 	qca7000.dtbo \
+	quadcan-fd.dtbo \
 	rotary-encoder.dtbo \
 	rpi-backlight.dtbo \
 	rpi-cirrus-wm5102.dtbo \

arch/arm/boot/dts/overlays/README

@@ -1345,6 +1345,31 @@ Params: oscillator              Clock frequency for the CAN controller (Hz)
 
         interrupt               GPIO for interrupt signal
 
+Name:   mcp2517-spi0.0-can0
+Info:   Configures the MCP2517/8 CAN controller on spi0.0
+Load:   dtoverlay=mcp2517-spi0.0-can0,<param>=<val>
+Params: oscillator              Clock frequency for the CAN controller (Hz)
+        spimaxfrequency         Maximum SPI frequence (Hz)
+        interrupt               GPIO for interrupt signal
+        clockdiv                use a clock divider of 2 to get system clock
+        clockoutdiv             clock divider used on clockout (0, 1, 2, 4, 10)
+        opendrain               all pins are open-drain (except for RX-CAN)
+        xstandby                use gpio0 as standby signal for transcciever
+
+Name:   mcp2517-spi0.1-can1
+Info:   Configures the MCP2517/8 CAN controller on spi0.1
+Load:   dtoverlay=mcp2517-spi0.1-can1,<param>=<val>
+Params: <see mcp2517-spi0.0-can0>
+
+Name:   mcp2517-spi1.0-can2
+Info:   Configures the MCP2517/8 CAN controller on spi1.0
+Load:   dtoverlay=mcp2517-spi1.0-can2,<param>=<val>
+Params: <see mcp2517-spi0.0-can0>
+
+Name:   mcp2517-spi1.1-can3
+Info:   Configures the MCP2517/8 CAN controller on spi1.1
+Load:   dtoverlay=mcp2517-spi1.1-can3,<param>=<val>
+Params: <see mcp2517-spi0.0-can0>
 
 Name:   mcp3008
 Info:   Configures MCP3008 A/D converters
@@ -1701,6 +1726,11 @@ Params: int_pin                 GPIO pin for interrupt signal (default 23)
 
         speed                   SPI bus speed (default 12 MHz)
 
+Name:   quadcan-fd
+Info:   Configures 4 mcp2517fd for the quadcan-fd hat
+Load:   dtoverlay=quadcan-fd
+Params: <None>
+
 
 Name:   rotary-encoder
 Info:   Overlay for GPIO connected rotary encoder.

arch/arm/boot/dts/overlays/mcp2517fd-spi0.0-can0-overlay.dts

@@ -0,0 +1,79 @@
+/*
+ * Device tree overlay for mcp2517fd/can0 on spi0.0
+ */
+
+/dts-v1/;
+/plugin/;
+
+/ {
+    compatible = "brcm,bcm2835", "brcm,bcm2836", "brcm,bcm2837", "brcm,bcm2708", "brcm,bcm2709",  "brcm,bcm2710";
+    /* disable spi-dev for spi0.0 */
+    fragment@0 {
+        target = <&spi0>;
+        __overlay__ {
+            status = "okay";
+        };
+    };
+
+    fragment@1 {
+	target = <&spidev0>;
+	__overlay__ {
+	    status = "disabled";
+	};
+    };
+
+    /* the interrupt pin of the can-controller */
+    fragment@2 {
+        target = <&gpio>;
+        __overlay__ {
+            can0_pins: can0_pins {
+                brcm,pins = <25>;
+                brcm,function = <0>; /* input */
+            };
+        };
+    };
+
+    /* the clock/oscillator of the can-controller */
+    fragment@3 {
+        target-path = "/clocks";
+        __overlay__ {
+            /* external oscillator of mcp2517fd on SPI0.0 */
+            can0_osc: can0_osc {
+                compatible = "fixed-clock";
+                #clock-cells = <0>;
+                clock-frequency  = <40000000>;
+            };
+        };
+    };
+
+    /* the spi config of the can-controller itself binding everything together */
+    fragment@4 {
+        target = <&spi0>;
+        __overlay__ {
+            /* needed to avoid dtc warning */
+            #address-cells = <1>;
+            #size-cells = <0>;
+            can0: mcp2517fd@0 {
+                reg = <0>;
+                compatible = "microchip,mcp2517fd";
+                pinctrl-names = "default";
+                pinctrl-0 = <&can0_pins>;
+                spi-max-frequency = <20000000>;
+                interrupt-parent = <&gpio>;
+                interrupts = <25 0x8>;
+                clocks = <&can0_osc>;
+                microchip,clock-out-div = <10>;
+            };
+        };
+    };
+
+    __overrides__ {
+        oscillator = <&can0_osc>,"clock-frequency:0";
+        spimaxfrequency = <&can0>,"spi-max-frequency:0";
+        interrupt = <&can0_pins>,"brcm,pins:0",<&can0>,"interrupts:0";
+	clockdiv = <&can0>,"microchip,clock-div?";
+	clockoutdiv = <&can0>,"microchip,clock-out-div:0";
+	opendrain = <&can0>, "microchip,gpio-open-drain?";
+	xstandby = <&can0>, "microchip,gpio0-xstandby?";
+    };
+};

arch/arm/boot/dts/overlays/mcp2517fd-spi0.1-can1-overlay.dts

@@ -0,0 +1,79 @@
+/*
+ * Device tree overlay for mcp2517fd/can1 on spi0.1
+ */
+
+/dts-v1/;
+/plugin/;
+
+/ {
+    compatible = "brcm,bcm2835", "brcm,bcm2836", "brcm,bcm2837", "brcm,bcm2708", "brcm,bcm2709",  "brcm,bcm2710";
+    /* disable spi-dev for spi0.1 */
+    fragment@0 {
+        target = <&spi0>;
+        __overlay__ {
+            status = "okay";
+        };
+    };
+
+    fragment@1 {
+	target = <&spidev1>;
+	__overlay__ {
+	    status = "disabled";
+	};
+    };
+
+    /* the interrupt pin of the can-controller */
+    fragment@2 {
+        target = <&gpio>;
+        __overlay__ {
+            can1_pins: can1_pins {
+                brcm,pins = <26>;
+                brcm,function = <0>; /* input */
+            };
+        };
+    };
+
+    /* the clock/oscillator of the can-controller */
+    fragment@3 {
+        target-path = "/clocks";
+        __overlay__ {
+            /* external oscillator of mcp2517fd on SPI0.0 */
+            can1_osc: can1_osc {
+                compatible = "fixed-clock";
+                #clock-cells = <0>;
+                clock-frequency  = <40000000>;
+            };
+        };
+    };
+
+    /* the spi config of the can-controller itself binding everything together */
+    fragment@4 {
+        target = <&spi0>;
+        __overlay__ {
+            /* needed to avoid dtc warning */
+            #address-cells = <1>;
+            #size-cells = <0>;
+            can1: mcp2517fd@1 {
+                reg = <1>;
+                compatible = "microchip,mcp2517fd";
+                pinctrl-names = "default";
+                pinctrl-0 = <&can1_pins>;
+                spi-max-frequency = <20000000>;
+                interrupt-parent = <&gpio>;
+                interrupts = <26 0x8>;
+                clocks = <&can1_osc>;
+                microchip,clock-out-div = <10>;
+            };
+        };
+    };
+
+    __overrides__ {
+        oscillator = <&can1_osc>,"clock-frequency:0";
+        spimaxfrequency = <&can1>,"spi-max-frequency:0";
+        interrupt = <&can1_pins>,"brcm,pins:0",<&can1>,"interrupts:0";
+	clockdiv = <&can1>,"microchip,clock-div?";
+	clockoutdiv = <&can1>,"microchip,clock-out-div:0";
+	opendrain = <&can1>, "microchip,gpio-open-drain?";
+	xstandby = <&can1>, "microchip,gpio0-xstandby?";
+    };
+};

arch/arm/boot/dts/overlays/mcp2517fd-spi1.0-can2-overlay.dts

@@ -0,0 +1,79 @@
+/*
+ * Device tree overlay for mcp2517fd/can2 on spi0.0
+ */
+
+/dts-v1/;
+/plugin/;
+
+/ {
+    compatible = "brcm,bcm2835", "brcm,bcm2836", "brcm,bcm2837", "brcm,bcm2708", "brcm,bcm2709",  "brcm,bcm2710";
+    /* disable spi-dev for spi0.0 */
+    fragment@0 {
+        target = <&spi0>;
+        __overlay__ {
+            status = "okay";
+        };
+    };
+
+    fragment@1 {
+	target = <&spidev0>;
+	__overlay__ {
+	    status = "disabled";
+	};
+    };
+
+    /* the interrupt pin of the can-controller */
+    fragment@2 {
+        target = <&gpio>;
+        __overlay__ {
+            can2_pins: can2_pins {
+                brcm,pins = <25>;
+                brcm,function = <0>; /* input */
+            };
+        };
+    };
+
+    /* the clock/oscillator of the can-controller */
+    fragment@3 {
+        target-path = "/clocks";
+        __overlay__ {
+            /* external oscillator of mcp2517fd on SPI0.0 */
+            can2_osc: can2_osc {
+                compatible = "fixed-clock";
+                #clock-cells = <0>;
+                clock-frequency  = <40000000>;
+            };
+        };
+    };
+
+    /* the spi config of the can-controller itself binding everything together */
+    fragment@4 {
+        target = <&spi0>;
+        __overlay__ {
+            /* needed to avoid dtc warning */
+            #address-cells = <1>;
+            #size-cells = <0>;
+            can2: mcp2517fd@0 {
+                reg = <0>;
+                compatible = "microchip,mcp2517fd";
+                pinctrl-names = "default";
+                pinctrl-0 = <&can2_pins>;
+                spi-max-frequency = <20000000>;
+                interrupt-parent = <&gpio>;
+                interrupts = <25 0x8>;
+                clocks = <&can2_osc>;
+                microchip,clock-out-div = <10>;
+            };
+        };
+    };
+
+    __overrides__ {
+        oscillator = <&can2_osc>,"clock-frequency:0";
+        spimaxfrequency = <&can2>,"spi-max-frequency:0";
+        interrupt = <&can2_pins>,"brcm,pins:0",<&can2>,"interrupts:0";
+	clockdiv = <&can2>,"microchip,clock-div?";
+	clockoutdiv = <&can2>,"microchip,clock-out-div:0";
+	opendrain = <&can2>, "microchip,gpio-open-drain?";
+	xstandby = <&can2>, "microchip,gpio0-xstandby?";
+    };
+};

arch/arm/boot/dts/overlays/mcp2517fd-spi1.1-can3-overlay.dts

@@ -0,0 +1,79 @@
+/*
+ * Device tree overlay for mcp2517fd/can3 on spi0.0
+ */
+
+/dts-v1/;
+/plugin/;
+
+/ {
+    compatible = "brcm,bcm2835", "brcm,bcm2836", "brcm,bcm2837", "brcm,bcm2708", "brcm,bcm2709",  "brcm,bcm2710";
+    /* disable spi-dev for spi0.0 */
+    fragment@0 {
+        target = <&spi0>;
+        __overlay__ {
+            status = "okay";
+        };
+    };
+
+    fragment@1 {
+	target = <&spidev0>;
+	__overlay__ {
+	    status = "disabled";
+	};
+    };
+
+    /* the interrupt pin of the can-controller */
+    fragment@2 {
+        target = <&gpio>;
+        __overlay__ {
+            can3_pins: can3_pins {
+                brcm,pins = <25>;
+                brcm,function = <0>; /* input */
+            };
+        };
+    };
+
+    /* the clock/oscillator of the can-controller */
+    fragment@3 {
+        target-path = "/clocks";
+        __overlay__ {
+            /* external oscillator of mcp2517fd on SPI0.0 */
+            can3_osc: can3_osc {
+                compatible = "fixed-clock";
+                #clock-cells = <0>;
+                clock-frequency  = <40000000>;
+            };
+        };
+    };
+
+    /* the spi config of the can-controller itself binding everything together */
+    fragment@4 {
+        target = <&spi0>;
+        __overlay__ {
+            /* needed to avoid dtc warning */
+            #address-cells = <1>;
+            #size-cells = <0>;
+            can3: mcp2517fd@0 {
+                reg = <0>;
+                compatible = "microchip,mcp2517fd";
+                pinctrl-names = "default";
+                pinctrl-0 = <&can3_pins>;
+                spi-max-frequency = <20000000>;
+                interrupt-parent = <&gpio>;
+                interrupts = <25 0x8>;
+                clocks = <&can3_osc>;
+                microchip,clock-out-div = <10>;
+            };
+        };
+    };
+
+    __overrides__ {
+        oscillator = <&can3_osc>,"clock-frequency:0";
+        spimaxfrequency = <&can3>,"spi-max-frequency:0";
+        interrupt = <&can3_pins>,"brcm,pins:0",<&can3>,"interrupts:0";
+	clockdiv = <&can3>,"microchip,clock-div?";
+	clockoutdiv = <&can3>,"microchip,clock-out-div:0";
+	opendrain = <&can3>, "microchip,gpio-open-drain?";
+	xstandby = <&can3>, "microchip,gpio0-xstandby?";
+    };
+};