Hi,

On Wed, Mar 27, 2019 at 01:18:38AM +0100, megous@megous.com wrote:
> From: Ondrej Jirman <megous@megous.com>
>
> A711 tablet has BMA250 accelerometer connected to I2C1 bus. Enable
> both the I2C1 bus and add the accelerometer device to it.
>
> Signed-off-by: Ondrej Jirman <megous@megous.com>
> ---
>  arch/arm/boot/dts/sun8i-a83t-tbs-a711.dts | 15 +++++++++++++++
>  1 file changed, 15 insertions(+)
>
> diff --git a/arch/arm/boot/dts/sun8i-a83t-tbs-a711.dts b/arch/arm/boot/dts/sun8i-a83t-tbs-a711.dts
> index 6aae70c89a1e..347fc0c31fa4 100644
> --- a/arch/arm/boot/dts/sun8i-a83t-tbs-a711.dts
> +++ b/arch/arm/boot/dts/sun8i-a83t-tbs-a711.dts
> @@ -156,6 +156,21 @@
>  	status = "okay";
>  };
>
> +&i2c1 {
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&i2c1_pins>;

It's there already

> +	clock-frequency = <400000>;
> +	status = "okay";
> +
> +	/* Accelerometer */
> +	bma250@18 {

The node name should be the class of the device, not its model, so
something like accelerometer.

Maxime

--
Maxime Ripard, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com