The CHIP uses on PD2 (a pin incorrectly called LCD_D2) a bitbanged 1-Wire bus to discover the adapters plug into it.
Add that bus to the device tree.
Signed-off-by: Maxime Ripard maxime.ripard@free-electrons.com --- arch/arm/dts/sun5i-r8-chip.dts | 15 +++++++++++++++ 1 file changed, 15 insertions(+), 0 deletions(-)
diff --git a/arch/arm/dts/sun5i-r8-chip.dts b/arch/arm/dts/sun5i-r8-chip.dts index 7a8cc2727960..fdba47c2bc33 100644 --- a/arch/arm/dts/sun5i-r8-chip.dts +++ b/arch/arm/dts/sun5i-r8-chip.dts @@ -59,6 +59,7 @@ i2c2 = &i2c2; serial0 = &uart1; serial1 = &uart3; + w10 = &w1; };
chosen { @@ -76,6 +77,13 @@ gpio = <&pio 2 19 GPIO_ACTIVE_HIGH>; /* PC19 */ enable-active-high; }; + + w1: onewire { + compatible = "w1-gpio"; + gpios = <&pio 3 2 GPIO_ACTIVE_HIGH>; /* PD2 */ + pinctrl-names = "default"; + pinctrl-0 = <&chip_w1_pin>; + }; };
&be0 { @@ -175,6 +183,13 @@ 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>; + }; };
®_dcdc2 {