On Wed Jan 21, 2026 at 9:06 PM CET, Dmitry Torokhov wrote: > 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?
In my opinion it would fit in this case in the event-hall-sensor node, that next to gpios = <&tlmm 70 GPIO_ACTIVE_LOW> we get a vdd-supply = <&vreg_l10b>. Regards Luca > > Thanks.
