Re: [PATCH v9 13/55] Input: atmel_mxt_ts - add regulator control support

[Dmitry Osipenko]

25.03.2020 16:32, Jiada Wang ÐÐÑÐÑ:
> From: Nick Dyer <nick.dyer@xxxxxxxxxxx>
> 
> Allow the driver to optionally manage enabling/disable power to the touch
> controller itself. If the regulators are not present then use the deep
> sleep power mode instead.
> 
> For a correct power on sequence, it is required that we have control over
> the RESET line.

...
> +	data->reg_vdd = devm_regulator_get(dev, "vdd");
> +	if (IS_ERR(data->reg_vdd)) {
> +		error = PTR_ERR(data->reg_vdd);
> +		dev_err(dev, "Error %d getting vdd regulator\n", error);
> +		goto fail;
> +	}
> +
> +	data->reg_avdd = devm_regulator_get(dev, "avdd");
> +	if (IS_ERR(data->reg_avdd)) {
> +		error = PTR_ERR(data->reg_avdd);
> +		dev_err(dev, "Error %d getting avdd regulator\n", error);
> +		goto fail_release;
> +	}

Hello Jiada,

The new regulator properties should be documented in the device-tree
binding.