On 8/28/2026 7:27 PM, Richard Genoud (TI) wrote:
> Add support for resuming from suspend in board_init_f for J722S.
> The resume state of the SOC is identified and lpm resume
> sequence is followed accordingly:
>
> - Extract context address from devicetree and send to TIFS.
> - Power on the rproc cluster.
> - Replay the certificates attached to saved images of ATF and OPTEE.
> - Resume sequence for context restore and rproc resume.
> - Image entry to DM firmware.
>
> The context address area is firewalled by TIFS to protect it from
> other hosts.
>
> Signed-off-by: Richard Genoud (TI) <[email protected]>
> ---
> arch/arm/mach-k3/j722s/j722s_init.c | 6 +++++-
> 1 file changed, 5 insertions(+), 1 deletion(-)
>
> diff --git a/arch/arm/mach-k3/j722s/j722s_init.c
> b/arch/arm/mach-k3/j722s/j722s_init.c
> index 1180c75f551d..e98c9d93ac53 100644
> --- a/arch/arm/mach-k3/j722s/j722s_init.c
> +++ b/arch/arm/mach-k3/j722s/j722s_init.c
> @@ -14,6 +14,7 @@
>
> #include "../sysfw-loader.h"
> #include "../common.h"
> +#include "../lpm-common.h"
>
> struct fwl_data cbass_main_fwls[] = {
> { "FSS_DAT_REG3", 7, 8 },
> @@ -37,7 +38,7 @@ static void store_boot_info_from_rom(void)
> sizeof(struct rom_extended_boot_data));
> }
>
> -static void ctrl_mmr_unlock(void)
> +void ctrl_mmr_unlock(void)
> {
> /* Unlock all WKUP_CTRL_MMR0 module registers */
> mmr_unlock(WKUP_CTRL_MMR0_BASE, 0);
Apart from mmr_unlock things, rest LGTM
> @@ -186,6 +187,9 @@ void board_init_f(ulong dummy)
>
> k3_spl_init();
> k3_mem_init();
> + if (j7xx_board_is_resuming())
> + do_resume(); /* no return */
> +
> setup_qos();
>
> if (IS_ENABLED(CONFIG_ESM_K3)) {
