Le 11/05/2026 à 12:48, Kumar, Udit a écrit :
On 4/30/2026 2:13 PM, Richard Genoud (TI) wrote:
From: "Thomas Richard (TI)" <[email protected]>
Add the capability to detect a resume. This overrides the weak function
j7xx_board_is_resuming(void).
To detect the resume, SPL searches a magic value (0xBA) in a register of
PMICA.
This value is set by DM-Firmware during the suspend sequence.
Signed-off-by: Thomas Richard (TI) <[email protected]>
---
board/ti/j721s2/evm.c | 37 +++++++++++++++++++++++++++++++++++++
1 file changed, 37 insertions(+)
diff --git a/board/ti/j721s2/evm.c b/board/ti/j721s2/evm.c
index 92d5c8498643..e18ba1a540c9 100644
--- a/board/ti/j721s2/evm.c
+++ b/board/ti/j721s2/evm.c
@@ -22,9 +22,11 @@
#include <dm/uclass-internal.h>
#include <dm/root.h>
#include <asm/arch/k3-ddr.h>
+#include <power/pmic.h>
#include "../common/board_detect.h"
#include "../common/fdt_ops.h"
+#include "../common/k3-lpm.h"
DECLARE_GLOBAL_DATA_PTR;
@@ -304,6 +306,41 @@ int board_late_init(void)
return 0;
}
+#if (IS_ENABLED(CONFIG_SPL_BUILD) && IS_ENABLED(CONFIG_TARGET_J721S2_R5_EVM) && IS_ENABLED(CONFIG_PMIC_TPS65941))
+
+/* in board_init_f(), there's no BSS, so we can't use global/static variables
*/
+bool j7xx_board_is_resuming(void)
+{
+ struct udevice *pmic;
+ int err;
+
+ if (gd_k3_resuming() != K3_RESUME_STATE_UNKNOWN)
+ goto end;
+
+ err = uclass_get_device_by_name(UCLASS_PMIC,
+ "pmic@48", &pmic);
+ if (err) {
+ printf("Getting PMIC init failed: %d\n", err);
+ goto end;
+ }
+ debug("%s: PMIC is detected (%s)\n", __func__, pmic->name);
+
+ if (pmic_reg_read(pmic, K3_LPM_SCRATCH_PAD_REG) ==
K3_LPM_MAGIC_SUSPEND) {
+ debug("%s: board is resuming\n", __func__);
+ gd_set_k3_resuming(K3_RESUME_STATE_RESUMING);
+
+ /* clean magic suspend */
+ if (pmic_reg_write(pmic, K3_LPM_SCRATCH_PAD_REG, 0))
+ printf("Failed to clean magic value for suspend detection in
PMIC\n");
+ } else {
+ debug("%s: board is booting (no resume detected)\n", __func__);
+ gd_set_k3_resuming(K3_RESUME_STATE_BOOTING);
+ }
Could all function be combined into common_j7xx_lpm.c for all supporting
SOCs.
J722s function is a little bit different, but I'll find a way to
factorize them.
+end:
+ return gd_k3_resuming() == K3_RESUME_STATE_RESUMING;
+}
+#endif /* CONFIG_SPL_BUILD && CONFIG_TARGET_J721S2_R5_EVM &&
CONFIG_PMIC_TPS65941 */
+
void spl_board_init(void)
{
struct udevice *dev;
Thanks,
Regards,
Richard
