One Wire on UDOO

chiefwigms · July 24, 2020

Armbianmonitor:

I'm trying to upgrade from Armbian 5.32 (Xenial Next/4.4.76) and was hoping to enable 1 wire again on my Udoo. For that build, I had to add one wire modules to the kernel config, then edit the imx6qdl-udoo.dtsi to set the onewire status to okay (from disabled).

In the dtsi, after udoo_ard: udoo_ard_manager it had:

onewire@0 { /* example for pin 08 */
    compatible = "w1-gpio";
    pinctrl-names = "default";
    pinctrl-0 = <&w1_gpio_pins>;
    status = "disabled"; /* "okay" to enable */
    gpios = <&gpio1 21 0>; 
};

and in iomuxc, there was a section (in external_hog: hoggrp-2, MX6QDL_PAD_SD1_DAT3__GPIO1_IO21 0x80000000 // pin 08):

w1_gpio_pins: w1-gpio@0 {
    fsl,pins = <
        MX6QDL_PAD_SD1_DAT3__GPIO1_IO21 0x80000000 /* example for pin 08 */
    >;
};

I tried adding the following to /boot/armbianEnv.txt

overlays=w1-gpio
param_w1_pin=21
param_w1_pin_int_pullup=0

with no luck. Do I need to modify the dtsi and rebuild, or is there an overlay that will add one wire? (the current dtsi has no entries for one wire)

chiefwigms · July 25, 2020

5 hours ago, chiefwigms said:
Armbianmonitor:
http://ix.io/2sgk

I'm trying to upgrade from Armbian 5.32 (Xenial Next/4.4.76) and was hoping to enable 1 wire again on my Udoo. For that build, I had to add one wire modules to the kernel config, then edit the imx6qdl-udoo.dtsi to set the onewire status to okay (from disabled).

In the dtsi, after udoo_ard: udoo_ard_manager it had:
onewire@0 { /* example for pin 08 */
    compatible = "w1-gpio";
    pinctrl-names = "default";
    pinctrl-0 = <&w1_gpio_pins>;
    status = "disabled"; /* "okay" to enable */
    gpios = <&gpio1 21 0>; 
};
and in iomuxc, there was a section (in external_hog: hoggrp-2, MX6QDL_PAD_SD1_DAT3__GPIO1_IO21 0x80000000 // pin 08):
w1_gpio_pins: w1-gpio@0 {
    fsl,pins = <
        MX6QDL_PAD_SD1_DAT3__GPIO1_IO21 0x80000000 /* example for pin 08 */
    >;
};
I tried adding the following to /boot/armbianEnv.txt
overlays=w1-gpio
param_w1_pin=21
param_w1_pin_int_pullup=0
with no luck. Do I need to modify the dtsi and rebuild, or is there an overlay that will add one wire? (the current dtsi has no entries for one wire)