On Tue, Nov 24, 2020 at 12:41:37PM +0800, Chen-Yu Tsai wrote: > On Tue, Nov 24, 2020 at 12:14 PM Samuel Holland <samuel@xxxxxxxxxxxx> wrote: > > > > On 11/23/20 10:10 AM, Michael Klein wrote: > > > Add gpio-poweroff node to allow the board to power itself off after > > > shutdown by disabling the SYSTEM and CPUX regulators (U5 resp. U6). > > > The RST button can be used to restart the board. > > > > The PSCI client will override this driver once the PSCI implementation > > is upgraded to v0.2 or newer functions. So having this around should > > cause no compatibility issues (although it would print an error in dmesg > > at that point). This seems like a reasonable thing to do for the other > > H2+/H3 boards that use a similar regulator layout. > > I wonder if this (gpio-poweroff) works if those regulators are also in the DT? It's probably not going to probe at all, since both would claim the exclusive usage of the GPIO? I guess we should model this properly using the regulator framework, and regulator_force_disable allows to bypass any usage count Maxime
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