On Fri, May 03, 2024 at 11:11:16AM +0200, Krzysztof Kozlowski wrote: > On 02/05/2024 11:56, Johan Hovold wrote: > > On Thu, Apr 25, 2024 at 11:39:24AM +0200, Krzysztof Kozlowski wrote: > >> It seems it is common problem. LEDs have property > >> "retain-state-shutdown", to indicate that during system shutdown we > >> should not touch them (like power off). Would some variant be applicable > >> here? First, do we talk here about power off like system shutdown or > >> runtime PM, thus suspend? > > > > A name like 'retain-state-shutdown' would also be too specific as what > > I'm describing here is that the reset line should be (or can be) left > > deasserted whenever the OS wants to power off the device. > > I don't think it is more specific than yours. It is actually more > generic. First, shutdown=poweroff, so that part is the same. My point is that 'shutdown' is a specific OS concept (i.e. turning the whole system off), while powering off a *device* can be done for a number of reasons including closing a character device, suspend and system-wide shutdown. The policy decision of when to power off a device is left up to kernel (e.g. if a device needs to be kept on as it is currently configured as a wakeup device). Johan
