Hi Sebastian, On Tue, Mar 2, 2021 at 4:44 PM Sebastian Reichel <sre@xxxxxxxxxx> wrote: > On Fri, Feb 05, 2021 at 02:33:19PM +0100, Geert Uytterhoeven wrote: > > Currently, there are two drivers binding to the R-Mobile System > > Controller (SYSC): > > - The rmobile-sysc driver registers PM domains from a core_initcall(), > > and does not use a platform driver, > > - The rmobile-reset driver registers a reset handler, and does use a > > platform driver. > > > > As fw_devlink only considers devices, it does not know that the > > rmobile-sysc driver is ready. Hence if fw_devlink is enabled, probing > > of on-chip devices that are part of the SYSC PM domain is deferred until > > the optional rmobile-reset has been bound, which may happen too late > > (for e.g. the system timer on SoCs lacking an ARM architectured or > > global timer), or not at all, leading to complete system boot failures. > > > > Fix this by: > > 1. Setting the OF_POPULATED flag for the SYSC device node after > > successful initialization. > > This will make of_link_to_phandle() ignore the SYSC device node as > > a dependency, making consumer devices probe again. > > 2. Move reset handling from its own driver into the rmobile-sysc > > driver. > > This is needed because setting OF_POPULATED prevents the > > rmobile-reset driver from binding against the same device. > > > > Signed-off-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx> > > --- > > To be queued in renesas-devel for v5.13. > > Acked-by: Sebastian Reichel <sre@xxxxxxxxxx> In the meantime, this has method been abandoned, and this patch was superseded by "[PATCH v2] soc: renesas: rmobile-sysc: Mark fwnode when PM domain is added" https://lore.kernel.org/linux-arm-kernel/20210216123958.3180014-1-geert+renesas@xxxxxxxxx/ Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds
