On Tue, Sep 17, 2019 at 05:58:08PM +0200, Marco Felsch wrote:
> Currently the driver do not care about the regulator which supplies the
> controller. This can lead into problems since we support (deep-)sleep
> because the regulator can be turned off before we send the (deep-)sleep
> command to the controller. Using a own regulator improves the power
> consumption during sleep even more.
> + tsdata->vdd = devm_regulator_get(&client->dev, "vdd");
> + if (IS_ERR(tsdata->vdd)) {
> + error = PTR_ERR(tsdata->vdd);
> + if (error == -EPROBE_DEFER)
> + return error;
Before it worked w/o regulator. You have to make it optional.
> + dev_err(&client->dev,
> + "Failed to request vdd-supply, error %d\n", error);
> + return error;
> + }
> +
> + error = regulator_enable(tsdata->vdd);
> + if (error) {
> + dev_err(&client->dev,
> + "Failed to enable vdd-supply, error %d\n", error);
> + return error;
> + }
--
With Best Regards,
Andy Shevchenko
