Hi there, I'm trying to made a dts file to handle a pican2 hat on ROCK64 armbian, but now I'm stuck. I'm a noob in writing dts files, I've tried to take as exemple dts from RPI and Thinker.
edit: I've rebuild the kernel, and build the mcp251x.ko module, it load like a charm. But I assume I've to write a correct .dts file to link it to my devices tree.
here is my loaded modules list:
Module Size Used by
can_bcm 24576 0
can_raw 20480 0
can 53248 2 can_bcm,can_raw
mali 262144 0
rt2800usb 28672 0
rt2800lib 81920 1 rt2800usb
rt2x00usb 20480 1 rt2800usb
rt2x00lib 49152 3 rt2x00usb,rt2800lib,rt2800usb
zram 32768 5
lz4_compress 16384 1 zram
mcp251x 20480 0
dw_hdmi_i2s_audio 16384 0
can_dev 20480 1 mcp251x
binfmt_misc 20480 1
ip_tables 24576 0
x_tables 32768 1 ip_tables
autofs4 40960 2
uas 20480 0
usb_storage 61440 1 uas
Cannot find device "can0"
eth0 lo wlx00c141390c5a
And as you can see, there is no can0 devices in /sys/class/net.
here is my dts file:
/dts-v1/;
/plugin/;
/ {
compatible = "rockchip,rk3328", "pine64,rock64";
fragment@0 {
target-path = "/spi@ff190000";
//target = <&spi0>;
__overlay__ {
status="okay";
spidev@0{
status = "disabled";
};
spidev@1{
status = "disabled";
};
};
};
/* the interrupt pin of the can-controller */
fragment@1 {
target-path = "/pinctrl/gpio3@ff240000";
//target = <&gpio3>;
__overlay__ {
can0_pins: can0_pins {
rockchip,pins = <0 7 0 &pcfg_pull_none>;
//phandle = <1>;
};
};
};
/* the clock/oscillator of the can-controller */
fragment@2 {
target-path = "/";
__overlay__ {
/* external oscillator of mcp2515 on SPI0.0 */
can0_osc: can0_osc {
compatible = "fixed-clock";
#clock-cells = <0>;
clock-frequency = <16000000>;
};
};
};
/* the spi config of the can-controller itself binding everything together */
fragment@3 {
target-path = "/spi@ff190000";
//target = <&spi0>;
__overlay__ {
/* needed to avoid dtc warning */
#address-cells = <1>;
#size-cells = <0>;
can0: can0@0 {
//phandle = <1>;
reg = <0>;
compatible = "microchip,mcp2515";
pinctrl-names = "default";
pinctrl-0 = <&can0_pins>;
//pinctrl-0 = "/pinctrl/gpio3@ff240000/can0_pins/";
spi-max-frequency = <10000000>;
interrupt-parent = <&gpio3>;
//interrupt-parent = "/pinctrl/gpio3@ff240000";
interrupts = <7 0x2>; // 7 2
//clocks = "/can0_osc";
clocks = <&can0_osc>;
};
};
};
};
here is what I can read from dmesg:
pi@rock64:/boot/overlay-user$ dmesg | fgrep -i spi
[ 0.199580] bus: 'spi': registered
[ 0.199591] device class 'spi_master': registering
[ 0.215439] device: 'ff190000.spi': device_add
[ 0.215471] bus: 'platform': add device ff190000.spi
[ 0.215560] PM: Adding info for platform:ff190000.spi
[ 2.069101] bus: 'spi': add driver cros-ec-spi
[ 2.069297] device class 'spi_transport': registering
[ 2.069329] device class 'spi_host': registering
[ 2.070797] bus: 'spi': add driver m25p80
[ 2.070861] device class 'spidev': registering
[ 2.070890] bus: 'spi': add driver spidev
[ 2.070956] bus: 'platform': add driver rockchip-spi
[ 2.071145] bus: 'platform': driver_probe_device: matched device ff190000.spi with driver rockchip-spi
[ 2.071162] bus: 'platform': really_probe: probing driver rockchip-spi with device ff190000.spi
[ 2.071495] rockchip-spi ff190000.spi: no init pinctrl state
[ 2.071552] rockchip-spi ff190000.spi: no sleep pinctrl state
[ 2.071566] rockchip-spi ff190000.spi: no idle pinctrl state
[ 2.071795] rockchip-spi ff190000.spi: no high_speed pinctrl state
[ 2.071820] device: 'spi32766': device_add
[ 2.072075] PM: Adding info for No Bus:spi32766
[ 2.072326] device: 'spi32766.0': device_add
[ 2.072362] bus: 'spi': add device spi32766.0
[ 2.072582] PM: Adding info for spi:spi32766.0
[ 2.072661] rockchip-spi ff190000.spi: chipselect 0 already in use
[ 2.072675] spi_master spi32766: spi_device register error /spi@ff190000/flash@0
[ 2.072692] spi_master spi32766: Failed to create SPI device for /spi@ff190000/flash@0
[ 2.072709] driver: 'rockchip-spi': driver_bound: bound to device 'ff190000.spi'
[ 2.072758] bus: 'platform': really_probe: bound device ff190000.spi to driver rockchip-spi
[ 8.643523] bus: 'spi': add driver mcp251x
[ 8.643560] bus: 'spi': driver_probe_device: matched device spi32766.0 with driver mcp251x
[ 8.643570] bus: 'spi': really_probe: probing driver mcp251x with device spi32766.0
[ 8.643678] mcp251x spi32766.0: no pinctrl handle
[ 8.646051] mcp251x spi32766.0: Looking up vdd-supply from device tree
[ 8.646071] mcp251x spi32766.0: Looking up vdd-supply property in node /spi@ff190000/can0@0 failed
[ 8.648100] mcp251x spi32766.0: Looking up xceiver-supply from device tree
[ 8.648120] mcp251x spi32766.0: Looking up xceiver-supply property in node /spi@ff190000/can0@0 failed
[ 8.661924] mcp251x: probe of spi32766.0 rejects match -19
pi@rock64:/boot/overlay-user$
help me plz.
