Add a helper to wait for TIFS initialization to be finished. Effectively this is just a call to get_ti_sci_handle() but I think a separate function makes the purpose of this call better visible.
get_ti_sci_handle() internally leads to fetching the TIFS version with a message and response. TIFS only responds once initialization finished. If a response is not received get_ti_sci_handle() returns after a timeout. Signed-off-by: Markus Schneider-Pargmann <[email protected]> --- arch/arm/mach-k3/common.c | 10 ++++++++++ arch/arm/mach-k3/common.h | 1 + 2 files changed, 11 insertions(+) diff --git a/arch/arm/mach-k3/common.c b/arch/arm/mach-k3/common.c index 6e382efdb3be..480c90cfa65f 100644 --- a/arch/arm/mach-k3/common.c +++ b/arch/arm/mach-k3/common.c @@ -54,6 +54,16 @@ struct ti_sci_handle *get_ti_sci_handle(void) return (struct ti_sci_handle *)ti_sci_get_handle_from_sysfw(dev); } +void k3_sysfw_wait_ready(void) +{ + /* + * Wait for TIFS initialization to finish. This helper is used to make + * sure TIFS removed the firewall before U-Boot tries to unlock CTRL_MMR + * registers and continues the boot. + */ + get_ti_sci_handle(); +} + void k3_sysfw_print_ver(void) { struct ti_sci_handle *ti_sci = get_ti_sci_handle(); diff --git a/arch/arm/mach-k3/common.h b/arch/arm/mach-k3/common.h index 37ff98d89924..146b986febc6 100644 --- a/arch/arm/mach-k3/common.h +++ b/arch/arm/mach-k3/common.h @@ -38,6 +38,7 @@ void disable_linefill_optimization(void); int remove_fwl_region(struct fwl_data *fwl); void remove_fwl_configs(struct fwl_data *fwl_data, size_t fwl_data_size); int load_firmware(char *name_fw, char *name_loadaddr, u32 *loadaddr); +void k3_sysfw_wait_ready(void); void k3_sysfw_print_ver(void); void k3_dm_print_ver(void); void spl_enable_cache(void); -- 2.55.0
