How to use 1-wire on Tinker2S?

[Fu-. 0]

I want to use Pin #7(GPIOB0) as 1-wire like a RaspberryPi.

Drivers(wire,w1-gpio,w1-therm) are loaded.

But, Pin #7 does not appear to be working correctly.

I modified a little on rk3399-tinker_board_2.dts like this:

/ {
     :

(SNIPPED)

   :

    w1 {
        compatible = "w1-gpio";
        pinctrl-names = "default";
        pinctrl-0 = <&w1_pin>;
        gpios = <&gpio0 RK_PB0 GPIO_ACTIVE_HIGH>;
        status = "okay";
    };
};

&pinctrl {

        pinctrl-0 = <&gpio_init &test_clkout2 &w1_pin>;
     :

(SNIPPED)

   :

    w1pin {
        w1_pin: w1-pin {
            rockchip,pins =
                <RK_GPIO0 RK_PB0 RK_FUNC_3 &pcfg_pull_up>;
               };
        };
};

---

dmesg says,

[    5.245994] Driver for 1-wire Dallas network protocol.

No devices detected.

gpio readall says Pin#7(GPIO 8) is GPIOB0, NOT CLKOUT.

 

Does anyone know a better way?

Regards,

 

 

[yi-hsin_hung 3]

Hi @Fu-.:

     Please reference the following information.

About gpio readall says Pin#7(GPIO ? is GPIOB0, NOT CLKOUT.

--> You need to modify the /boot/config.txt by the following to enable test_clkout2

     #intf:test_clkout2=off --> intf:test_clkout2=on

##### Hardware Interface Config #####

## Note: uart4 and spi1 are the same pins. Set the latter one while both on. ##

intf:fiq_debugger=on
#intf:uart0=off
#intf:uart4=off
intf:i2c6=on
#intf:i2c7=off
#intf:i2s0=off
#intf:spdif=off
#intf:spi1=off
#intf:spi5=off
#intf:pwm0=off
#intf:pwm1=off
#intf:pwm3a=off
#intf:test_clkout2=off