diff --git a/components/esp_hw_support/include/esp_private/sleep_retention.h b/components/esp_hw_support/include/esp_private/sleep_retention.h
index e10199af0b8..29623e7956b 100644
--- a/components/esp_hw_support/include/esp_private/sleep_retention.h
+++ b/components/esp_hw_support/include/esp_private/sleep_retention.h
@@ -17,7 +17,7 @@ extern "C" {
 #include "esp_regdma.h"
 #include "soc/retention_periph_defs.h"
 
-#define SLEEP_RETENTION_MODULE_BITMAP_SZ    ((SLEEP_RETENTION_MODULE_MAX >> 5) + 1)
+#define SLEEP_RETENTION_MODULE_BITMAP_SZ    (((SLEEP_RETENTION_MODULE_MAX - 1) >> 5) + 1)
 
 /**
  * @file sleep_retention.h
diff --git a/components/esp_hw_support/sleep_retention.c b/components/esp_hw_support/sleep_retention.c
index eb4232a3e8b..b3d74235325 100644
--- a/components/esp_hw_support/sleep_retention.c
+++ b/components/esp_hw_support/sleep_retention.c
@@ -184,7 +184,7 @@ typedef struct {
 #define SLEEP_RETENTION_REGDMA_LINK_NR_PRIORITIES       (8u)
 #define SLEEP_RETENTION_REGDMA_LINK_HIGHEST_PRIORITY    (0)
 #define SLEEP_RETENTION_REGDMA_LINK_LOWEST_PRIORITY     (SLEEP_RETENTION_REGDMA_LINK_NR_PRIORITIES - 1)
-#define SLEEP_RETENTION_MODULE_INVALID                  ((sleep_retention_module_t)(-1)) /* the final node does not belong to any module */
+#define SLEEP_RETENTION_MODULE_INVALID                  ((sleep_retention_module_t)(SLEEP_RETENTION_MODULE_MAX)) /* the final node does not belong to any module */
     struct {
         sleep_retention_entries_t entries;
         uint32_t entries_bitmap: REGDMA_LINK_ENTRY_NUM;
@@ -199,7 +199,7 @@ typedef struct {
     sleep_retention_module_bitmap_t inited_modules;
     sleep_retention_module_bitmap_t created_modules;
 
-    struct sleep_retention_module_object instance[SLEEP_RETENTION_MODULE_MAX + 1];
+    struct sleep_retention_module_object instance[SLEEP_RETENTION_MODULE_MAX];
 
 #define EXTRA_LINK_NUM  (REGDMA_LINK_ENTRY_NUM - 1)
 } sleep_retention_t;
@@ -325,7 +325,7 @@ static void sleep_retention_entries_stats(void)
 
 void sleep_retention_dump_modules(FILE *out)
 {
-    for (int i = SLEEP_RETENTION_MODULE_MIN; i <= SLEEP_RETENTION_MODULE_MAX; i++) {
+    for (int i = SLEEP_RETENTION_MODULE_MIN; i < SLEEP_RETENTION_MODULE_MAX; i++) {
         bool inited = sleep_retention_is_module_inited(i);
         bool created = sleep_retention_is_module_created(i);
         bool is_top = is_top_domain_module(i);
@@ -489,13 +489,17 @@ static void sleep_retention_entries_all_destroy_wrapper(sleep_retention_module_t
             priority++;
         }
     } while (priority < SLEEP_RETENTION_REGDMA_LINK_NR_PRIORITIES);
-    s_retention.created_modules.bitmap[module >> 5] &= ~BIT(module % 32);
+    /* INVALID (== MAX) is a non-module sentinel; skip bitmap updates. */
+    if (module < SLEEP_RETENTION_MODULE_MAX) {
+        s_retention.created_modules.bitmap[module >> 5] &= ~BIT(module % 32);
+    }
     _lock_release_recursive(&s_retention.lock);
 }
 
 static void sleep_retention_entries_do_destroy(sleep_retention_module_t module)
 {
-    assert(SLEEP_RETENTION_MODULE_MIN <= module && module <= SLEEP_RETENTION_MODULE_MAX);
+    /* Allow SLEEP_RETENTION_MODULE_INVALID for final-default rollback. */
+    assert(SLEEP_RETENTION_MODULE_MIN <= module && module <= SLEEP_RETENTION_MODULE_INVALID);
     _lock_acquire_recursive(&s_retention.lock);
     sleep_retention_entries_join();
     sleep_retention_entries_stats();
@@ -505,7 +509,7 @@ static void sleep_retention_entries_do_destroy(sleep_retention_module_t module)
 
 static void sleep_retention_entries_destroy(sleep_retention_module_t module)
 {
-    assert(SLEEP_RETENTION_MODULE_MIN <= module && module <= SLEEP_RETENTION_MODULE_MAX);
+    assert(SLEEP_RETENTION_MODULE_MIN <= module && module < SLEEP_RETENTION_MODULE_MAX);
     _lock_acquire_recursive(&s_retention.lock);
     sleep_retention_entries_do_destroy(module);
     uint32_t created_modules = 0;
@@ -636,7 +640,7 @@ esp_err_t sleep_retention_entries_create(const sleep_retention_entries_config_t
     if (priority >= SLEEP_RETENTION_REGDMA_LINK_NR_PRIORITIES) {
         return ESP_ERR_INVALID_ARG;
     }
-    if (module < SLEEP_RETENTION_MODULE_MIN || module > SLEEP_RETENTION_MODULE_MAX) {
+    if (module < SLEEP_RETENTION_MODULE_MIN || module >= SLEEP_RETENTION_MODULE_MAX) {
         return ESP_ERR_INVALID_ARG;
     }
     esp_err_t err = sleep_retention_entries_check_and_create_final_default();
@@ -677,7 +681,7 @@ sleep_retention_module_bitmap_t IRAM_ATTR sleep_retention_get_created_modules(vo
 
 bool sleep_retention_is_module_inited(sleep_retention_module_t module)
 {
-    if (module < SLEEP_RETENTION_MODULE_MIN || module > SLEEP_RETENTION_MODULE_MAX) {
+    if (module < SLEEP_RETENTION_MODULE_MIN || module >= SLEEP_RETENTION_MODULE_MAX) {
         return false;
     }
     _lock_acquire_recursive(&s_retention.lock);
@@ -688,7 +692,7 @@ bool sleep_retention_is_module_inited(sleep_retention_module_t module)
 
 bool sleep_retention_is_module_created(sleep_retention_module_t module)
 {
-    if (module < SLEEP_RETENTION_MODULE_MIN || module > SLEEP_RETENTION_MODULE_MAX) {
+    if (module < SLEEP_RETENTION_MODULE_MIN || module >= SLEEP_RETENTION_MODULE_MAX) {
         return false;
     }
     _lock_acquire_recursive(&s_retention.lock);
@@ -733,7 +737,7 @@ bool IRAM_ATTR sleep_retention_module_bitmap_eq(sleep_retention_module_bitmap_t
 
 esp_err_t sleep_retention_module_init(sleep_retention_module_t module, sleep_retention_module_init_param_t *param)
 {
-    if (module < SLEEP_RETENTION_MODULE_MIN || module > SLEEP_RETENTION_MODULE_MAX) {
+    if (module < SLEEP_RETENTION_MODULE_MIN || module >= SLEEP_RETENTION_MODULE_MAX) {
         return ESP_ERR_INVALID_ARG;
     }
     if (param == NULL || param->cbs.create.handle == NULL) {
@@ -766,7 +770,7 @@ esp_err_t sleep_retention_module_init(sleep_retention_module_t module, sleep_ret
 
 esp_err_t sleep_retention_module_deinit(sleep_retention_module_t module)
 {
-    if (module < SLEEP_RETENTION_MODULE_MIN || module > SLEEP_RETENTION_MODULE_MAX) {
+    if (module < SLEEP_RETENTION_MODULE_MIN || module >= SLEEP_RETENTION_MODULE_MAX) {
         return ESP_ERR_INVALID_ARG;
     }
 
@@ -797,7 +801,7 @@ esp_err_t sleep_retention_module_deinit(sleep_retention_module_t module)
 
 static esp_err_t sleep_retention_passive_module_allocate(sleep_retention_module_t module)
 {
-    assert(module >= SLEEP_RETENTION_MODULE_MIN && module <= SLEEP_RETENTION_MODULE_MAX);
+    assert(module >= SLEEP_RETENTION_MODULE_MIN && module < SLEEP_RETENTION_MODULE_MAX);
 
     esp_err_t err = ESP_OK;
     _lock_acquire_recursive(&s_retention.lock);
@@ -827,7 +831,7 @@ static esp_err_t sleep_retention_passive_module_allocate(sleep_retention_module_
 
 esp_err_t sleep_retention_module_allocate(sleep_retention_module_t module)
 {
-    if (module < SLEEP_RETENTION_MODULE_MIN || module > SLEEP_RETENTION_MODULE_MAX) {
+    if (module < SLEEP_RETENTION_MODULE_MIN || module >= SLEEP_RETENTION_MODULE_MAX) {
         return ESP_ERR_INVALID_ARG;
     }
 
@@ -865,7 +869,7 @@ esp_err_t sleep_retention_module_allocate(sleep_retention_module_t module)
 
 static esp_err_t sleep_retention_passive_module_free(sleep_retention_module_t module)
 {
-    assert(module >= SLEEP_RETENTION_MODULE_MIN && module <= SLEEP_RETENTION_MODULE_MAX);
+    assert(module >= SLEEP_RETENTION_MODULE_MIN && module < SLEEP_RETENTION_MODULE_MAX);
 
     esp_err_t err = ESP_OK;
     _lock_acquire_recursive(&s_retention.lock);
@@ -893,7 +897,7 @@ static esp_err_t sleep_retention_passive_module_free(sleep_retention_module_t mo
 
 esp_err_t sleep_retention_module_free(sleep_retention_module_t module)
 {
-    if (module < SLEEP_RETENTION_MODULE_MIN || module > SLEEP_RETENTION_MODULE_MAX) {
+    if (module < SLEEP_RETENTION_MODULE_MIN || module >= SLEEP_RETENTION_MODULE_MAX) {
         return ESP_ERR_INVALID_ARG;
     }
 
diff --git a/components/soc/esp32c5/include/soc/Kconfig.soc_caps.in b/components/soc/esp32c5/include/soc/Kconfig.soc_caps.in
index 538073e7465..33bb2642532 100644
--- a/components/soc/esp32c5/include/soc/Kconfig.soc_caps.in
+++ b/components/soc/esp32c5/include/soc/Kconfig.soc_caps.in
@@ -1507,10 +1507,6 @@ config SOC_PM_PMU_MIN_SLP_SLOW_CLK_CYCLE_FIXED
     bool
     default y
 
-config SOC_PM_RETENTION_MODULE_NUM
-    int
-    default 32
-
 config SOC_CLK_RC_FAST_SUPPORT_CALIBRATION
     bool
     default y
diff --git a/components/soc/esp32c5/include/soc/retention_periph_defs.h b/components/soc/esp32c5/include/soc/retention_periph_defs.h
index 2e88399b58d..389f8372b85 100644
--- a/components/soc/esp32c5/include/soc/retention_periph_defs.h
+++ b/components/soc/esp32c5/include/soc/retention_periph_defs.h
@@ -7,7 +7,6 @@
 #pragma once
 
 #include <stdint.h>
-#include "soc_caps.h"
 
 #ifdef __cplusplus
 extern "C" {
@@ -56,7 +55,7 @@ typedef enum periph_retention_module {
     SLEEP_RETENTION_MODULE_802154_MAC   = 30,
     SLEEP_RETENTION_MODULE_MODEM_PHY    = 31,
 
-    SLEEP_RETENTION_MODULE_MAX          = SOC_PM_RETENTION_MODULE_NUM - 1
+    SLEEP_RETENTION_MODULE_MAX,
 } periph_retention_module_t;
 
 #define is_top_domain_module(m)                           \
diff --git a/components/soc/esp32c5/include/soc/soc_caps.h b/components/soc/esp32c5/include/soc/soc_caps.h
index 9dbc9c3d241..375a71c49f2 100644
--- a/components/soc/esp32c5/include/soc/soc_caps.h
+++ b/components/soc/esp32c5/include/soc/soc_caps.h
@@ -612,8 +612,6 @@
 
 #define SOC_PM_PMU_MIN_SLP_SLOW_CLK_CYCLE_FIXED    (1)
 
-#define SOC_PM_RETENTION_MODULE_NUM         (32)
-
 /*-------------------------- CLOCK SUBSYSTEM CAPS ----------------------------------------*/
 #define SOC_CLK_RC_FAST_SUPPORT_CALIBRATION       (1)
 #define SOC_MODEM_CLOCK_IS_INDEPENDENT            (1)
diff --git a/components/soc/esp32c6/include/soc/Kconfig.soc_caps.in b/components/soc/esp32c6/include/soc/Kconfig.soc_caps.in
index 4a9808eb8e1..26fbae23f48 100644
--- a/components/soc/esp32c6/include/soc/Kconfig.soc_caps.in
+++ b/components/soc/esp32c6/include/soc/Kconfig.soc_caps.in
@@ -1267,10 +1267,6 @@ config SOC_PM_PMU_MIN_SLP_SLOW_CLK_CYCLE_FIXED
     bool
     default y
 
-config SOC_PM_RETENTION_MODULE_NUM
-    int
-    default 32
-
 config SOC_CLK_RC_FAST_SUPPORT_CALIBRATION
     bool
     default y
diff --git a/components/soc/esp32c6/include/soc/retention_periph_defs.h b/components/soc/esp32c6/include/soc/retention_periph_defs.h
index ee48a60b137..d253bce498a 100644
--- a/components/soc/esp32c6/include/soc/retention_periph_defs.h
+++ b/components/soc/esp32c6/include/soc/retention_periph_defs.h
@@ -7,7 +7,6 @@
 #pragma once
 
 #include <stdint.h>
-#include "soc_caps.h"
 
 #ifdef __cplusplus
 extern "C" {
@@ -55,7 +54,7 @@ typedef enum periph_retention_module {
     SLEEP_RETENTION_MODULE_BT_BB        = 29,
     SLEEP_RETENTION_MODULE_802154_MAC   = 30,
 
-    SLEEP_RETENTION_MODULE_MAX          = SOC_PM_RETENTION_MODULE_NUM - 1
+    SLEEP_RETENTION_MODULE_MAX,
 } periph_retention_module_t;
 
 #define is_top_domain_module(m)                           \
diff --git a/components/soc/esp32c6/include/soc/soc_caps.h b/components/soc/esp32c6/include/soc/soc_caps.h
index b02c5419c50..4169a02f8a5 100644
--- a/components/soc/esp32c6/include/soc/soc_caps.h
+++ b/components/soc/esp32c6/include/soc/soc_caps.h
@@ -527,8 +527,6 @@
 #define SOC_PM_PAU_REGDMA_UPDATE_CACHE_BEFORE_WAIT_COMPARE  (1)
 #define SOC_PM_PMU_MIN_SLP_SLOW_CLK_CYCLE_FIXED    (1)
 
-#define SOC_PM_RETENTION_MODULE_NUM         (32)
-
 /*-------------------------- CLOCK SUBSYSTEM CAPS ----------------------------------------*/
 #define SOC_CLK_RC_FAST_SUPPORT_CALIBRATION       (1)
 #define SOC_MODEM_CLOCK_IS_INDEPENDENT            (1)
diff --git a/components/soc/esp32c61/include/soc/Kconfig.soc_caps.in b/components/soc/esp32c61/include/soc/Kconfig.soc_caps.in
index 666f807c180..5484880b524 100644
--- a/components/soc/esp32c61/include/soc/Kconfig.soc_caps.in
+++ b/components/soc/esp32c61/include/soc/Kconfig.soc_caps.in
@@ -1143,10 +1143,6 @@ config SOC_PM_PMU_MIN_SLP_SLOW_CLK_CYCLE_FIXED
     bool
     default y
 
-config SOC_PM_RETENTION_MODULE_NUM
-    int
-    default 32
-
 config SOC_CLK_RC_FAST_SUPPORT_CALIBRATION
     bool
     default y
diff --git a/components/soc/esp32c61/include/soc/retention_periph_defs.h b/components/soc/esp32c61/include/soc/retention_periph_defs.h
index c0922649cae..844480b0b7f 100644
--- a/components/soc/esp32c61/include/soc/retention_periph_defs.h
+++ b/components/soc/esp32c61/include/soc/retention_periph_defs.h
@@ -7,7 +7,6 @@
 #pragma once
 
 #include <stdint.h>
-#include "soc_caps.h"
 
 #ifdef __cplusplus
 extern "C" {
@@ -48,7 +47,7 @@ typedef enum periph_retention_module {
     SLEEP_RETENTION_MODULE_BT_BB        = 29,
     SLEEP_RETENTION_MODULE_802154_MAC   = 30,
 
-    SLEEP_RETENTION_MODULE_MAX          = SOC_PM_RETENTION_MODULE_NUM - 1
+    SLEEP_RETENTION_MODULE_MAX,
 } periph_retention_module_t;
 
 #define is_top_domain_module(m)                           \
diff --git a/components/soc/esp32c61/include/soc/soc_caps.h b/components/soc/esp32c61/include/soc/soc_caps.h
index 52676047a4c..f3562018ac0 100644
--- a/components/soc/esp32c61/include/soc/soc_caps.h
+++ b/components/soc/esp32c61/include/soc/soc_caps.h
@@ -475,8 +475,6 @@
 #define SOC_PM_PAU_REGDMA_UPDATE_CACHE_BEFORE_WAIT_COMPARE  (1)
 #define SOC_PM_PMU_MIN_SLP_SLOW_CLK_CYCLE_FIXED    (1)
 
-#define SOC_PM_RETENTION_MODULE_NUM         (32)
-
 /*-------------------------- CLOCK SUBSYSTEM CAPS ----------------------------------------*/
 #define SOC_CLK_RC_FAST_SUPPORT_CALIBRATION       (1)
 #define SOC_MODEM_CLOCK_IS_INDEPENDENT            (1)
diff --git a/components/soc/esp32h2/include/soc/Kconfig.soc_caps.in b/components/soc/esp32h2/include/soc/Kconfig.soc_caps.in
index e36a071b0d0..8c664de77fa 100644
--- a/components/soc/esp32h2/include/soc/Kconfig.soc_caps.in
+++ b/components/soc/esp32h2/include/soc/Kconfig.soc_caps.in
@@ -1219,10 +1219,6 @@ config SOC_PM_PAU_REGDMA_UPDATE_CACHE_BEFORE_WAIT_COMPARE
     bool
     default y
 
-config SOC_PM_RETENTION_MODULE_NUM
-    int
-    default 32
-
 config SOC_EXT_MEM_CACHE_TAG_IN_CPU_DOMAIN
     bool
     default y
diff --git a/components/soc/esp32h2/include/soc/retention_periph_defs.h b/components/soc/esp32h2/include/soc/retention_periph_defs.h
index b4585071cac..cd40bb36824 100644
--- a/components/soc/esp32h2/include/soc/retention_periph_defs.h
+++ b/components/soc/esp32h2/include/soc/retention_periph_defs.h
@@ -7,7 +7,6 @@
 #pragma once
 
 #include <stdint.h>
-#include "soc_caps.h"
 
 #ifdef __cplusplus
 extern "C" {
@@ -53,7 +52,7 @@ typedef enum periph_retention_module {
     SLEEP_RETENTION_MODULE_BT_BB        = 29,
     SLEEP_RETENTION_MODULE_802154_MAC   = 30,
 
-    SLEEP_RETENTION_MODULE_MAX          = SOC_PM_RETENTION_MODULE_NUM - 1
+    SLEEP_RETENTION_MODULE_MAX,
 } periph_retention_module_t;
 
 #define is_top_domain_module(m)                           \
diff --git a/components/soc/esp32h2/include/soc/soc_caps.h b/components/soc/esp32h2/include/soc/soc_caps.h
index 0a3d6742591..a28b218b6b3 100644
--- a/components/soc/esp32h2/include/soc/soc_caps.h
+++ b/components/soc/esp32h2/include/soc/soc_caps.h
@@ -525,8 +525,6 @@
 
 #define SOC_PM_PAU_REGDMA_UPDATE_CACHE_BEFORE_WAIT_COMPARE  (1)
 
-#define SOC_PM_RETENTION_MODULE_NUM         (32)
-
 #define SOC_EXT_MEM_CACHE_TAG_IN_CPU_DOMAIN        (1)
 #define SOC_PM_CPU_RETENTION_BY_SW                 (1)
 #define SOC_PM_MODEM_RETENTION_BY_REGDMA           (1)
diff --git a/components/soc/esp32h21/include/soc/Kconfig.soc_caps.in b/components/soc/esp32h21/include/soc/Kconfig.soc_caps.in
index 46c9e1b2708..57f72ac2432 100644
--- a/components/soc/esp32h21/include/soc/Kconfig.soc_caps.in
+++ b/components/soc/esp32h21/include/soc/Kconfig.soc_caps.in
@@ -915,10 +915,6 @@ config SOC_PM_PAU_LINK_NUM
     int
     default 5
 
-config SOC_PM_RETENTION_MODULE_NUM
-    int
-    default 32
-
 config SOC_PM_PAU_REGDMA_LINK_CONFIGURABLE
     bool
     default y
diff --git a/components/soc/esp32h21/include/soc/retention_periph_defs.h b/components/soc/esp32h21/include/soc/retention_periph_defs.h
index 99cf5abccc9..70b8b4c30d6 100644
--- a/components/soc/esp32h21/include/soc/retention_periph_defs.h
+++ b/components/soc/esp32h21/include/soc/retention_periph_defs.h
@@ -7,7 +7,6 @@
 #pragma once
 
 #include <stdint.h>
-#include "soc_caps.h"
 
 #ifdef __cplusplus
 extern "C" {
@@ -52,7 +51,7 @@ typedef enum periph_retention_module {
     SLEEP_RETENTION_MODULE_BT_BB        = 29,
     SLEEP_RETENTION_MODULE_802154_MAC   = 30,
 
-    SLEEP_RETENTION_MODULE_MAX          = SOC_PM_RETENTION_MODULE_NUM - 1
+    SLEEP_RETENTION_MODULE_MAX,
 } periph_retention_module_t;
 
 #define is_top_domain_module(m)                           \
diff --git a/components/soc/esp32h21/include/soc/soc_caps.h b/components/soc/esp32h21/include/soc/soc_caps.h
index bd5b93bdb6d..364afc610c4 100644
--- a/components/soc/esp32h21/include/soc/soc_caps.h
+++ b/components/soc/esp32h21/include/soc/soc_caps.h
@@ -493,7 +493,6 @@
 #define SOC_PM_SUPPORT_VDDSDIO_PD       (1)
 #define SOC_PM_SUPPORT_TOP_PD           (1)
 #define SOC_PM_PAU_LINK_NUM             (5)
-#define SOC_PM_RETENTION_MODULE_NUM     (32)
 #define SOC_PM_PAU_REGDMA_LINK_CONFIGURABLE        (1)
 #define SOC_PM_CPU_RETENTION_BY_SW                 (1)
 #define SOC_PM_MODEM_RETENTION_BY_REGDMA           (1)
diff --git a/components/soc/esp32h4/include/soc/Kconfig.soc_caps.in b/components/soc/esp32h4/include/soc/Kconfig.soc_caps.in
index 6b602b83c7b..1d4ad2e771b 100644
--- a/components/soc/esp32h4/include/soc/Kconfig.soc_caps.in
+++ b/components/soc/esp32h4/include/soc/Kconfig.soc_caps.in
@@ -979,10 +979,6 @@ config SOC_PM_PAU_REGDMA_LINK_CONFIGURABLE
     bool
     default y
 
-config SOC_PM_RETENTION_MODULE_NUM
-    int
-    default 64
-
 config SOC_CLK_RC_FAST_SUPPORT_CALIBRATION
     bool
     default y
diff --git a/components/soc/esp32h4/include/soc/retention_periph_defs.h b/components/soc/esp32h4/include/soc/retention_periph_defs.h
index 0abaf0a0e2d..9b4677c66a7 100644
--- a/components/soc/esp32h4/include/soc/retention_periph_defs.h
+++ b/components/soc/esp32h4/include/soc/retention_periph_defs.h
@@ -7,7 +7,6 @@
 #pragma once
 
 #include <stdint.h>
-#include "soc_caps.h"
 
 #ifdef __cplusplus
 extern "C" {
@@ -57,7 +56,7 @@ typedef enum periph_retention_module {
     SLEEP_RETENTION_MODULE_BT_BB        = 31,
     SLEEP_RETENTION_MODULE_802154_MAC   = 32,
 
-    SLEEP_RETENTION_MODULE_MAX          = SOC_PM_RETENTION_MODULE_NUM - 1
+    SLEEP_RETENTION_MODULE_MAX,
 } periph_retention_module_t;
 
 #define is_top_domain_module(m)                           \
diff --git a/components/soc/esp32h4/include/soc/soc_caps.h b/components/soc/esp32h4/include/soc/soc_caps.h
index 728c9188cd7..8c6f3d34482 100644
--- a/components/soc/esp32h4/include/soc/soc_caps.h
+++ b/components/soc/esp32h4/include/soc/soc_caps.h
@@ -508,7 +508,6 @@
 
 #define SOC_PM_PAU_LINK_NUM                 (4)
 #define SOC_PM_PAU_REGDMA_LINK_CONFIGURABLE (1)
-#define SOC_PM_RETENTION_MODULE_NUM         (64)
 
 /*-------------------------- CLOCK SUBSYSTEM CAPS ----------------------------------------*/
 #define SOC_CLK_RC_FAST_SUPPORT_CALIBRATION       (1)
diff --git a/components/soc/esp32p4/include/soc/Kconfig.soc_caps.in b/components/soc/esp32p4/include/soc/Kconfig.soc_caps.in
index 7a4d03bb422..2d521749595 100644
--- a/components/soc/esp32p4/include/soc/Kconfig.soc_caps.in
+++ b/components/soc/esp32p4/include/soc/Kconfig.soc_caps.in
@@ -1867,10 +1867,6 @@ config SOC_SLEEP_TGWDT_STOP_WORKAROUND
     bool
     default y
 
-config SOC_PM_RETENTION_MODULE_NUM
-    int
-    default 64
-
 config SOC_CLK_RC_FAST_SUPPORT_CALIBRATION
     bool
     default y
diff --git a/components/soc/esp32p4/include/soc/retention_periph_defs.h b/components/soc/esp32p4/include/soc/retention_periph_defs.h
index 41bd1beabe7..e68a66c97f9 100644
--- a/components/soc/esp32p4/include/soc/retention_periph_defs.h
+++ b/components/soc/esp32p4/include/soc/retention_periph_defs.h
@@ -7,7 +7,6 @@
 #pragma once
 
 #include <stdint.h>
-#include "soc_caps.h"
 
 #ifdef __cplusplus
 extern "C" {
@@ -67,7 +66,7 @@ typedef enum periph_retention_module {
     SLEEP_RETENTION_MODULE_DMA2D        = 41,
     SLEEP_RETENTION_MODULE_PPA          = 42,
 
-    SLEEP_RETENTION_MODULE_MAX          = SOC_PM_RETENTION_MODULE_NUM - 1
+    SLEEP_RETENTION_MODULE_MAX,
 } periph_retention_module_t;
 
 #define is_top_domain_module(m)                           \
diff --git a/components/soc/esp32p4/include/soc/soc_caps.h b/components/soc/esp32p4/include/soc/soc_caps.h
index 910d571760f..fbf303ec973 100644
--- a/components/soc/esp32p4/include/soc/soc_caps.h
+++ b/components/soc/esp32p4/include/soc/soc_caps.h
@@ -716,8 +716,6 @@
 #define SOC_SLEEP_SYSTIMER_STALL_WORKAROUND 1    //TODO IDF-11381: replace with all xtal field clk gate control
 #define SOC_SLEEP_TGWDT_STOP_WORKAROUND     1    //TODO IDF-11381: replace with all xtal field clk gate control
 
-#define SOC_PM_RETENTION_MODULE_NUM         (64)
-
 /*-------------------------- CLOCK SUBSYSTEM CAPS ----------------------------------------*/
 #define SOC_CLK_RC_FAST_SUPPORT_CALIBRATION       (1)
 
diff --git a/components/soc/include/soc/regdma.h b/components/soc/include/soc/regdma.h
index 28ea701a7e2..f761babcce6 100644
--- a/components/soc/include/soc/regdma.h
+++ b/components/soc/include/soc/regdma.h
@@ -18,6 +18,8 @@ extern "C" {
 
 #if SOC_PAU_SUPPORTED
 
+#include "soc/retention_periph_defs.h"
+
 #define REGDMA_LINK_ENTRY_NUM   (SOC_PM_PAU_LINK_NUM) /* Maximum number of REG DMA linked list entries */
 
 #ifndef ARRAY_SIZE
@@ -186,15 +188,15 @@ typedef struct regdma_link_branch_write_wait_body {
     volatile uint32_t   mask;
 } regdma_link_branch_write_wait_body_t;
 
-ESP_STATIC_ASSERT(REGDMA_LINK_ENTRY_NUM <= 16, "regdma link entry number should equal to and less than 16");
+ESP_STATIC_ASSERT(REGDMA_LINK_ENTRY_NUM < 16, "regdma link entry number must be less than 16 to pack module into stats");
 typedef struct regdma_link_stats {
     volatile uint32_t   ref: REGDMA_LINK_ENTRY_NUM, /* a bitmap, identifies which entry has referenced the current link */
-#if REGDMA_LINK_ENTRY_NUM < 16
-             reserve: 16 - REGDMA_LINK_ENTRY_NUM,
-#endif
+             module: 16 - REGDMA_LINK_ENTRY_NUM, /* module id; width leaves room beside ref within the low 16 bits */
              id: 16; /* REGDMA linked list node unique identifier */
-    volatile int    module; /* a number used to identify the module to which the current node belongs */
 } regdma_link_stats_t;
+ESP_STATIC_ASSERT(sizeof(regdma_link_stats_t) == 4, "regdma_link_stats_t must be 4 bytes");
+ESP_STATIC_ASSERT(SLEEP_RETENTION_MODULE_MAX < (1u << (16 - REGDMA_LINK_ENTRY_NUM)),
+                  "module id exceeds bitfield width");
 
 typedef struct regdma_link_continuous {
     regdma_link_stats_t             stat;