ARM: sun5i: chip: add a node for the w1 gpio controller

The CHIP uses a 1-Wire bus to discover the DIPs. Enable the bus in the DT.

Signed-off-by: Antoine Tenart <antoine.tenart@free-electrons.com>
Acked-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>

diff --git a/arch/arm/boot/dts/sun5i-r8-chip.dts b/arch/arm/boot/dts/sun5i-r8-chip.dts
index e616084b9495042feb3f34d9b0c34a6d7216260a..059d86865b73383ee8cd468f0f2ac4105c4766e0 100644 (file)
--- a/arch/arm/boot/dts/sun5i-r8-chip.dts
+++ b/arch/arm/boot/dts/sun5i-r8-chip.dts
@@ -81,6 +81,13 @@
                pinctrl-0 = <&chip_wifi_reg_on_pin>;
                reset-gpios = <&pio 2 19 GPIO_ACTIVE_LOW>; /* PC19 */
        };
+
+       onewire {
+               compatible = "w1-gpio";
+               gpios = <&pio 3 2 GPIO_ACTIVE_HIGH>; /* PD2 */
+               pinctrl-names = "default";
+               pinctrl-0 = <&chip_w1_pin>;
+       };
 };
 
 &be0 {
@@ -181,6 +188,13 @@
                allwinner,drive = <SUN4I_PINCTRL_10_MA>;
                allwinner,pull = <SUN4I_PINCTRL_NO_PULL>;
        };
+
+       chip_w1_pin: chip_w1_pin@0 {
+               allwinner,pins = "PD2";
+               allwinner,function = "gpio_in";
+               allwinner,drive = <SUN4I_PINCTRL_10_MA>;
+               allwinner,pull = <SUN4I_PINCTRL_PULL_UP>;
+       };
 };
 
 &reg_dcdc2 {