Hi Balaji, On Thu, 8 Jan 2026 at 03:17, Balaji Selvanathan <[email protected]> wrote: > > Implement board_quiesce_devices() to cleanup RPMH controllers > before booting the kernel. This ensures all RPMH TCS hardware > state is cleared, preventing timeout errors during kernel RPMH > driver initialization. > > Signed-off-by: Aswin Murugan <[email protected]> > Signed-off-by: Balaji Selvanathan <[email protected]> > --- > arch/arm/mach-snapdragon/board.c | 14 ++++++++++++++ > 1 file changed, 14 insertions(+) > > diff --git a/arch/arm/mach-snapdragon/board.c > b/arch/arm/mach-snapdragon/board.c > index 5fb3240acc5..194318af228 100644 > --- a/arch/arm/mach-snapdragon/board.c > +++ b/arch/arm/mach-snapdragon/board.c > @@ -32,6 +32,7 @@ > #include <usb.h> > #include <sort.h> > #include <time.h> > +#include <soc/qcom/rpmh.h> > > #include "qcom-priv.h" > > @@ -709,6 +710,19 @@ static void carve_out_reserved_memory(void) > } > } > > +/** > + * board_quiesce_devices() - Quiesce devices before booting kernel > + * > + * Called by U-Boot before booting the kernel to ensure all devices > + * are in a clean state. This is critical for RPMH to prevent kernel > + * timeout issues during initialization. > + */ > +void board_quiesce_devices(void) > +{ > + /* Clear RPMH TCS configurations before kernel boot */ > + rpmh_rsc_cleanup_all(); > +} > + > /* This function open-codes setup_all_pgtables() so that we can > * insert additional mappings *before* turning on the MMU. > */ > -- > 2.34.1 >
What are RPMH and TCS? Can you add a dummy driver for this hardware and mark it with DM_FLAG_OS_PREPARE ? Regards, Simon
