Messages in this thread |  | | Date | Thu, 30 Jan 2020 12:01:03 +0200 | From | Andy Shevchenko <> | Subject | Re: [PATCH v3 5/5] console: Introduce ->exit() callback |
| |
On Thu, Jan 30, 2020 at 10:09:17AM +0100, Petr Mladek wrote: > On Mon 2020-01-27 13:47:19, Andy Shevchenko wrote: > > Some consoles might require special operations on unregistering. For example, > > serial console, when registered in the kernel, keeps power on for entire time, > > until it gets unregistered. For such cases to have a balance we would provide > > ->exit() callback. > > Is there any plan to use this callback, please? > > The console init, setup, registration code needs a clean up, > definitely. If you plan some rework, I would like to understand > the bigger picture before we start adding new callbacks.
Yes, as mentioned in the commit message I would like to use it for balancing runtime PM reference counters in the UART code later on.
It will look like:
->setup(): pm_runtime_get(...);
->exit(): pm_runtime_put(...);
The current operations have no needs to be undone.
-- With Best Regards, Andy Shevchenko
|  |