[RK3288 device tree overlays]

The problem has been solved.
I rewrote the DTS as follows:

 

/ {
    w1 {
        compatible = "w1-gpio";
        pinctrl-names = "default";
        pinctrl-0 = <&w1_gpio_pins>;
        gpios = <&gpio0 17 0>;
    };
};

&pinctrl {
    onewire {
        w1_gpio_pins: w1-gpio-pins {
            rockchip,pins = <0 17 0 &pcfg_pull_up>;
        };
    };
};

 

I am now able to use 1-wire.

 

results:

root@tinkerboard:/sys/bus/w1/devices# ll
total 0
drwxr-xr-x 2 root root 0 Apr 23 19:49 .
drwxr-xr-x 4 root root 0 Apr 23 19:49 ..
lrwxrwxrwx 1 root root 0 Apr 23 19:50 28-031590341bff -> ../../../devices/w1_bus_master1/28-031590341bff
lrwxrwxrwx 1 root root 0 Apr 23 19:50 28-0416505667ff -> ../../../devices/w1_bus_master1/28-0416505667ff
lrwxrwxrwx 1 root root 0 Apr 23 19:49 w1_bus_master1 -> ../../../devices/w1_bus_master1
root@tinkerboard:/sys/bus/w1/devices# cat 28-031590341bff/w1_slave
61 01 4b 46 7f ff 0c 10 57 : crc=57 YES
61 01 4b 46 7f ff 0c 10 57 t=22062
 

Regards,

 

[RK3288 device tree overlays]

I'm not sure.
It simply describes the DTS as follows:

/ {
    model = "Rockchip RK3288 Asus Tinker Board S";
    compatible = "asus,rk3288-tinker-s", "rockchip,rk3288";

    onewire {
        compatible = "w1-gpio";
        pinctrl-names = "default";
        pinctrl-0 = <&w1_pins>;
        gpios = <&gpio0 17 0>;
    };
};

&pinctrl {
    w1_pins: w1-pins {
        rockchip,pins = <0 17 0 &pcfg_pull_up>;
    };
};

 

If this is read at boot time, dmesg will print the following error: 
[8.225790] Driver for 1-wire Dallas network protocol.
[ 8.230301] rockchip-pinctrl pinctrl: unable to find group for node w1-pins
[ 8.230333] w1-gpio: probe of onewire failed with error -22

 

 

I don't know why it is "unable to find group for node w1-pins" at all.
Do you have any good advice?

 

kernel version is:

$ uname -a

Linux tinkerboard 5.4.34-rockchip #trunk SMP PREEMPT Tue Apr 21 23:15:05 JST 2020 armv7l GNU/Linux

[RK3288 device tree overlays]

I'm starting to understand.
A closer look at dmesg showed the following error.

 

[3.768101] Driver for 1-wire Dallas network protocol.
[ 3.768532] rockchip-pinctrl pinctrl: unable to find group for node w1_pins
[3.768554] w1-gpio: probe of onewire failed with error -22

 

I think I'm writing the DTS wrong way, so I'm going to review it.

[RK3288 device tree overlays]

dmesg says

[    2.453319] Driver for 1-wire Dallas network protocol.

 

[RK3288 device tree overlays]

Yes, lsmod displays wire, w1-gpio and w1-therm.

[RK3288 device tree overlays]

I tried to apply a new patch like this:

---

diff --git a/arch/arm/boot/dts/rk3288-miqi.dts b/arch/arm/boot/dts/rk3288-miqi.dts
index c41d012c8..70c0b6365 100644
--- a/arch/arm/boot/dts/rk3288-miqi.dts
+++ b/arch/arm/boot/dts/rk3288-miqi.dts
@@ -37,6 +44,14 @@
         };
     };
 
+    onewire {
+        compatible = "w1-gpio";
+        pinctrl-names = "default";
+        pinctrl-0 = <&w1_pins>;
+        gpios = <&gpio0 17 0>;
+        status = "okay";
+    };
+
     vcc_flash: flash-regulator {
         compatible = "regulator-fixed";
         regulator-name = "vcc_flash";
@@ -294,6 +314,10 @@
         drive-strength = <12>;
     };
 
+    w1_pins: w1_pins@0 {
+        rockchip,pins = <0 17 0 &pcfg_pull_up>;
+    };
+
     act8846 {
         pmic_int: pmic-int {
             rockchip,pins = <0 RK_PA4 RK_FUNC_GPIO &pcfg_pull_up>;
---

 

But, no devices found on /sys/bus/w1/devices.

What should I do anything?

 

EDIT:

I want to use linux-mainline(5.4.y) kernel.

[RK3288 device tree overlays]

Thanks, I'll try later.

[RK3288 device tree overlays]

Yes, I patched like this:

---

diff --git a/arch/arm/boot/dts/rk3288-tinker-s.dts b/arch/arm/boot/dts/rk3288-tinker-s.dts
index 970e13859..4fff9467d 100644
--- a/arch/arm/boot/dts/rk3288-tinker-s.dts
+++ b/arch/arm/boot/dts/rk3288-tinker-s.dts
@@ -10,6 +10,32 @@
 / {
     model = "Rockchip RK3288 Asus Tinker Board S";
     compatible = "asus,rk3288-tinker-s", "rockchip,rk3288";
+
+    fragment@0 {
+        target-path = "/";
+        __overlay__ {
+            w1: onewire@0 {
+                compatible = "w1-gpio";
+                pinctrl-names = "default";
+                pinctrl-0 = <&w1_pins>;
+                gpios = <&gpio0 17 0>;
+                status = "okay";
+            };
+        };
+    };
+
+    fragment@1 {
+        target = <&gpio0>;
+        __overlay__ {
+            w1_pins: w1_pins@0 {
+                rockchip,pins = <0 17 0 &pcfg_pull_up>;
+            };
+        };
+    };
+};
+
+&i2c1 {
+    status = "okay";
 };
 
 &emmc {
@@ -28,3 +54,4 @@
     pinctrl-names = "default";
     pinctrl-0 = <&hdmi_cec_c0>;
 };
+
---

 

and also w1-gpio is loaded on '/etc/modules'.

 

[RK3288 device tree overlays]

Hi,

 

I want to use 1-wire on TinkerBoard with the latest Linux Kernel.
I created dtb with rk3288-tinker-s.dts patched with reference to RaspberryPi w1-gpio.dts, but it didn't work.
When I run "cat /sys/kernel/debug/gpio", (w1) is not displayed.
Is there any good workaround?

 

Regards,

 

Additional:

I wrote a line 'fdtfile=rk3288-tinker-s.dtb' in /boot/armbianEnv.txt