dtb pin name for 1-wire

[Ninjava]

Hello.
I am trying to have the 1-wire working on Rockpi4B+ on pin GPIO4_D6 (= number 158).
I have this /boot/armbianEnv.txt:

verbosity=1
bootlogo=true
overlay_prefix=rockchip
fdtfile=rockchip/rk3399-rock-pi-4b.dtb
rootdev=UUID=aa1f4e9a-bad9-4760-87c5-511247ef7227
rootfstype=ext4
overlays=w1-gpio
param_w1_pin=GPIO4_D6
param_w1_pin_int_pullup=1
usbstoragequirks=0x2537:0x1066:u,0x2537:0x1068:u

but when I check on my board:
 

sudo cat /sys/kernel/debug/gpio
GPIOs 0-31, platform/pinctrl, gpio0:
 gpio-4   (                    |bt_default_wake_host) in  lo
 gpio-9   (                    |bt_default_reset    ) out hi
 gpio-10  (                    |reset               ) out hi

GPIOs 32-63, platform/pinctrl, gpio1:
 gpio-35  (                    |vcc5v0_otg          ) out hi
 gpio-36  (                    |w1                  ) in  lo
 gpio-46  (                    |vsel                ) out lo
 gpio-49  (                    |vsel                ) out lo

GPIOs 64-95, platform/pinctrl, gpio2:
 gpio-83  (                    |bt_default_rts      ) out hi
 gpio-90  (                    |vcc3v3_pcie         ) out hi
 gpio-91  (                    |bt_default_wake     ) out hi

GPIOs 96-127, platform/pinctrl, gpio3:
 gpio-124 (                    |?                   ) out lo
 gpio-125 (                    |?                   ) out lo

GPIOs 128-159, platform/pinctrl, gpio4:
 gpio-153 (                    |vcc5v0_host         ) out hi

and if I check the dtb file:
 

Quote

 

pi@rockpi-4b:~$ fdtdump /boot/dtb-4.4.213-rockchip64/rockchip/overlay/rockchip-w1-gpio.dtbo

**** fdtdump is a low-level debugging tool, not meant for general use.
**** If you want to decompile a dtb, you probably want
****     dtc -I dtb -O dts <filename>

/dts-v1/;
// magic:               0xd00dfeed
// totalsize:           0x1eb (491)
// off_dt_struct:       0x38
// off_dt_strings:      0x1a8
// off_mem_rsvmap:      0x28
// version:             17
// last_comp_version:   16
// boot_cpuid_phys:     0x0
// size_dt_strings:     0x43
// size_dt_struct:      0x170

/ {
    compatible = "rockchip,rk3399";
    fragment@0 {
        target-path = "/";
        __overlay__ {
            onewire@0 {
                compatible = "w1-gpio";
                pinctrl-names = "default";
                gpios = <0xffffffff 0x00000004 0x00000000 0x000000ae>;
                status = "okay";
                phandle = <0x00000001>;
            };
        };
    };
    __symbols__ {
        w1 = "/fragment@0/__overlay__/onewire@0";
    };
    __fixups__ {
        gpio1 = "/fragment@0/__overlay__/onewire@0:gpios:0";
    };
};

 

 

It appears than the w1-gpio is connected to GPIO1_A5 (= number 36)
I guess something went wrong in the configuration of 1-wire pin, but what ?

[Ninjava]

Ok, I found the problem. There is a bug in the w1-gpio.dtbo installed with armbian.
If I use it, I have a dmeg saying 'w1-pins' group missing.
I created my own dts file:

sudo nano w1-gpio.dts

and remove fragment@1 and pinctrl-0 = <&w1_pins>;

/dts-v1/;
/plugin/;

/ {
        compatible = "rockchip,rockpi","rockchip,rk3399";

        fragment@0 {
                target-path = "/";

                __overlay__ {

                        w1: onewire@0 {
                                compatible = "w1-gpio";
                                pinctrl-names = "default";
                                gpios = <&gpio4 30 0>;
                                status = "okay";
                        };
                };
        };

};

and compiled it:
 sudo dtc -I dts -O dtb -o /boot/dtb-5.15.63-rockchip64/rockchip/overlay/rockchip-w1-gpio.dtbo w1-gpio.dts

 

and I have my hardware working !

sudo dmesg | grep w1
[    7.553669] w1_master_driver w1_bus_master1: Attaching one wire slave 10.000802e5e4d1 crc 3c