* Chen-Yu Tsai <wenst@xxxxxxxxxxxx> [230606 09:19]: > The 8250_mtk driver's runtime PM support has some issues: > > - The bus clock is enabled (through runtime PM callback) later than a > register write > - runtime PM resume callback directly called in probe, but no > pm_runtime_set_active() call is present > - UART PM function calls the callbacks directly, _and_ calls runtime > PM API > - runtime PM callbacks try to do reference counting, adding yet another > count between runtime PM and clocks > > This fragile setup worked in a way, but broke recently with runtime PM > support added to the serial core. The system would hang when the UART > console was probed and brought up. Great, looks like a good for Linux next to me: Reviewed-by: Tony Lindgren <tony@xxxxxxxxxxx>
