On Tue, Oct 01, 2024 at 12:07:16PM +0100, Mark Brown wrote: > On Tue, Oct 01, 2024 at 02:57:10AM -0700, Dmitry Torokhov wrote: > > > This will add an unwanted delay on ACPI systems that handle power > > sequencing in firmware. However use of "optional" regulators is frowned > > upon in this case as the supply in reality is not optional. > > > Mark, has there been any developments that would help reconciling > > difference in behavior between ACPI and DT systems. Ideally we'd need to > > know when supply was turned on, and adjust the wait accordingly. > > There's not been any changes here, but there's always been an event > availalbe when a regulator is turned on? There's also no difference > between DT and ACPI systems here, both could have the regulator fixed on > and I'd certainly not want to rely on an ACPI system implementing a > device specific delay after power on given the sort of stuff they like > to put into machine specific drivers. Well with Elan in native mode ACPI FW does do proper power sequencing, that is why this commit mentions failures observed on Mediatek devices. Thanks. -- Dmitry
