refactor: Add a settings reset function

For now, this just clears BLE bonds, but it can be updated in the
future to handle clearing all settings.

app/include/zmk/ble.h

@@ -31,7 +31,7 @@ bool zmk_ble_active_profile_is_open();
 bool zmk_ble_active_profile_is_connected();
 char *zmk_ble_active_profile_name();
 
-int zmk_ble_unpair_all();
+void zmk_ble_unpair_all(void);
 
 #if IS_ENABLED(CONFIG_ZMK_SPLIT_ROLE_CENTRAL)
 void zmk_ble_set_peripheral_addr(bt_addr_le_t *addr);

app/include/zmk/reset.h

@@ -14,3 +14,11 @@
  * @param type A ZMK_RESET_* value indicating how to reboot.
  */
 FUNC_NORETURN void zmk_reset(int type);
+
+/**
+ * Clear all persistent settings.
+ *
+ * This should typically be followed by a call to zmk_reset() to ensure that
+ * all subsystems are properly reset.
+ */
+void zmk_reset_settings(void);

app/src/ble.c

@@ -38,6 +38,7 @@ LOG_MODULE_DECLARE(zmk, CONFIG_ZMK_LOG_LEVEL);
 
 #if IS_ENABLED(CONFIG_ZMK_BLE_PASSKEY_ENTRY)
 #include <zmk/events/keycode_state_changed.h>
+#include "ble.h"
 
 #define PASSKEY_DIGITS 6
 
@@ -278,6 +279,25 @@ bt_addr_le_t *zmk_ble_active_profile_addr() { return &profiles[active_profile].p
 
 char *zmk_ble_active_profile_name() { return profiles[active_profile].name; }
 
+void zmk_ble_unpair_all(void) {
+    LOG_WRN("Clearing all existing BLE bond information from the keyboard");
+
+    int err = bt_unpair(BT_ID_DEFAULT, NULL);
+    if (err) {
+        LOG_ERR("Failed to unpair default identity: %d", err);
+    }
+
+    for (int i = 0; i < ZMK_BLE_PROFILE_COUNT; i++) {
+        char setting_name[15];
+        sprintf(setting_name, "ble/profiles/%d", i);
+
+        err = settings_delete(setting_name);
+        if (err) {
+            LOG_ERR("Failed to delete setting: %d", err);
+        }
+    }
+}
+
 #if IS_ENABLED(CONFIG_ZMK_SPLIT_ROLE_CENTRAL)
 
 void zmk_ble_set_peripheral_addr(bt_addr_le_t *addr) {
@@ -575,19 +595,7 @@ static int zmk_ble_init(const struct device *_arg) {
 #endif
 
 #if IS_ENABLED(CONFIG_ZMK_BLE_CLEAR_BONDS_ON_START)
-    LOG_WRN("Clearing all existing BLE bond information from the keyboard");
+    zmk_ble_unpair_all();
-
-    bt_unpair(BT_ID_DEFAULT, NULL);
-
-    for (int i = 0; i < ZMK_BLE_PROFILE_COUNT; i++) {
-        char setting_name[15];
-        sprintf(setting_name, "ble/profiles/%d", i);
-
-        err = settings_delete(setting_name);
-        if (err) {
-            LOG_ERR("Failed to delete setting: %d", err);
-        }
-    }
 #endif
 
     bt_conn_cb_register(&conn_callbacks);

app/src/reset.c

@@ -6,7 +6,11 @@
 
 #include <zephyr/sys/reboot.h>
 #include <zephyr/logging/log.h>
+#include <zephyr/sys/util.h>
 
+#if IS_ENABLED(CONFIG_ZMK_BLE)
+#include <zmk/ble.h>
+#endif
 #include <zmk/reset.h>
 
 LOG_MODULE_DECLARE(zmk, CONFIG_ZMK_LOG_LEVEL);
@@ -35,3 +39,10 @@ FUNC_NORETURN void zmk_reset(int type) {
         break;
     }
 }
+
+void zmk_reset_settings(void) {
+#if IS_ENABLED(CONFIG_ZMK_BLE)
+    zmk_ble_unpair_all();
+#endif
+    // TODO: clear settings for all subsystems.
+}