diff options
Diffstat (limited to 'arch/arm/boot/dts/overlays/w1-gpio-pullup-overlay.dts')
-rw-r--r-- | arch/arm/boot/dts/overlays/w1-gpio-pullup-overlay.dts | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/arch/arm/boot/dts/overlays/w1-gpio-pullup-overlay.dts b/arch/arm/boot/dts/overlays/w1-gpio-pullup-overlay.dts new file mode 100644 index 000000000000..953c6a1aeab9 --- /dev/null +++ b/arch/arm/boot/dts/overlays/w1-gpio-pullup-overlay.dts @@ -0,0 +1,42 @@ +// Definitions for w1-gpio module (with external pullup) +/dts-v1/; +/plugin/; + +/ { + compatible = "brcm,bcm2835"; + + fragment@0 { + target-path = "/"; + __overlay__ { + + w1: onewire@0 { + compatible = "w1-gpio"; + pinctrl-names = "default"; + pinctrl-0 = <&w1_pins>; + gpios = <&gpio 4 0>, <&gpio 5 1>; + status = "okay"; + }; + }; + }; + + fragment@1 { + target = <&gpio>; + __overlay__ { + w1_pins: w1_pins@0 { + brcm,pins = <4 5>; + brcm,function = <0 1>; // in out + brcm,pull = <0 0>; // off off + }; + }; + }; + + __overrides__ { + gpiopin = <&w1>,"gpios:4", + <&w1>,"reg:0", + <&w1_pins>,"brcm,pins:0", + <&w1_pins>,"reg:0"; + extpullup = <&w1>,"gpios:16", + <&w1_pins>,"brcm,pins:4"; + pullup; // Silently ignore unneeded parameter + }; +}; |