On Wed, Jan 21, 2026 at 09:07:44AM +0100, Luca Weiss wrote: > On Wed Jan 21, 2026 at 12:05 AM CET, Dmitry Baryshkov wrote: > > On Mon, Jan 19, 2026 at 04:52:23PM +0100, Luca Weiss wrote: > >> On Mon Jan 19, 2026 at 3:41 PM CET, Konrad Dybcio wrote: > >> > On 1/16/26 3:22 PM, Luca Weiss wrote: > >> >> Add a node for the Hall Effect sensor, used to detect whether the Flip > >> >> Cover is closed or not. > >> >> > >> >> The sensor is powered through vreg_l10b, so let's put a > >> >> regulator-always-on on that to make sure the sensor gets power. > >> > > >> > Is there anything else on L10B? Can we turn it off if the hall sensor > >> > is e.g. user-disabled? > >> > >> It's the voltage source for pull-up of sensor I2C bus (so > >> ADSP-managed?), DVDD for amplifiers and VDD for a most sensors like > >> the gyro. > >> > >> So realistically, it'll probably be (nearly) always on anyways. And I > >> don't want to shave another yak by adding vdd support to gpio-keys... > > > > Why? If it is exactly what happens on the board: the device producing > > GPIO events _is_ powered via a vdd. Added Input maintainer / list to cc. > > Yes, the hall sensor which is connected to the GPIO on the SoC, has an > extra VDD input which needs to be on in order for the Hall-effect sensor > to be on. > > See page 133 "HALL" in the center of the page > https://www.fairphone.com/wp-content/uploads/2025/08/Fairphone-Gen.-6_-Information-on-how-to-repair-dispose-of-and-recycle-EN-NL-FR-DE.pdf > > The IC is OCH166AEV4AD where VDD is (as expected) "Power Supply Input": > https://www.orient-chip.com/Public/Uploads/uploadfile/files/20231014/1OCH166Adatasheet202203221.pdf
If we add regulator support to gpio-keys do we expect it to be per-gpio/per-key? Or we'd recommend splitting into several instances of gpio-keys so that there is on set of supplies per gpio-keys device? Thanks. -- Dmitry
