diff --git a/core/Makefile b/core/Makefile
index 84df1dbdb2..4e67e612b6 100644
--- a/core/Makefile
+++ b/core/Makefile
@@ -307,7 +307,7 @@ build_reflash: ## build reflash firmware + reflash image
 	dd if=build/bootloader/bootloader.bin of=$(REFLASH_BUILD_DIR)/sdimage.bin bs=1 seek=49152
 
 build_kernel: ## build kernel image
-	$(SCONS) PYOPT=1 $(KERNEL_BUILD_DIR)/kernel.bin
+	$(SCONS) $(KERNEL_BUILD_DIR)/kernel.bin
 
 build_firmware: templates build_cross build_kernel ## build firmware with frozen modules
 	$(SCONS) $(FIRMWARE_BUILD_DIR)/firmware.bin
diff --git a/core/embed/projects/kernel/main.c b/core/embed/projects/kernel/main.c
index d209980f34..ae5584cfec 100644
--- a/core/embed/projects/kernel/main.c
+++ b/core/embed/projects/kernel/main.c
@@ -36,7 +36,6 @@
 #include <util/option_bytes.h>
 #include <util/rsod.h>
 #include <util/unit_properties.h>
-#include "memzero.h"
 
 #ifdef USE_BUTTON
 #include <io/button.h>
@@ -51,8 +50,7 @@
 #endif
 
 #ifdef USE_OPTIGA
-#include <sec/optiga_commands.h>
-#include <sec/optiga_transport.h>
+#include <sec/optiga_config.h>
 #endif
 
 #ifdef USE_POWERCTL
@@ -87,26 +85,6 @@
 #include <sys/trustzone.h>
 #endif
 
-#ifdef USE_OPTIGA
-#if !PYOPT
-#include <inttypes.h>
-#if 1  // color log
-#define OPTIGA_LOG_FORMAT \
-  "%" PRIu32 " \x1b[35moptiga\x1b[0m \x1b[32mDEBUG\x1b[0m %s: "
-#else
-#define OPTIGA_LOG_FORMAT "%" PRIu32 " optiga DEBUG %s: "
-#endif
-static void optiga_log_hex(const char *prefix, const uint8_t *data,
-                           size_t data_size) {
-  printf(OPTIGA_LOG_FORMAT, hal_ticks_ms() * 1000, prefix);
-  for (size_t i = 0; i < data_size; i++) {
-    printf("%02x", data[i]);
-  }
-  printf("\n");
-}
-#endif
-#endif
-
 void drivers_init() {
 #ifdef USE_POWERCTL
   powerctl_init();
@@ -150,11 +128,6 @@ void drivers_init() {
   secure_aes_init();
 #endif
 
-#ifdef USE_OPTIGA
-  uint8_t secret[SECRET_OPTIGA_KEY_LEN] = {0};
-  secbool secret_ok = secret_optiga_get(secret);
-#endif
-
   entropy_init();
 
 #if PRODUCTION || BOOTLOADER_QA
@@ -186,27 +159,7 @@ void drivers_init() {
 #endif
 
 #ifdef USE_OPTIGA
-
-#if !PYOPT
-  // command log is relatively quiet so we enable it in debug builds
-  optiga_command_set_log_hex(optiga_log_hex);
-  // transport log can be spammy, uncomment if you want it:
-  // optiga_transport_set_log_hex(optiga_log_hex);
-#endif
-
-  optiga_init();
-  if (sectrue == secret_ok) {
-    // If the shielded connection cannot be established, reset Optiga and
-    // continue without it. In this case, OID_KEY_FIDO and OID_KEY_DEV cannot be
-    // used, which means device and FIDO attestation will not work.
-    if (optiga_sec_chan_handshake(secret, sizeof(secret)) != OPTIGA_SUCCESS) {
-      optiga_soft_reset();
-    }
-  }
-  memzero(secret, sizeof(secret));
-  ensure(sectrue * (optiga_open_application() == OPTIGA_SUCCESS),
-         "Cannot initialize optiga.");
-
+  optiga_init_and_configure();
 #endif
 }
 
diff --git a/core/embed/sec/optiga/inc/sec/optiga_config.h b/core/embed/sec/optiga/inc/sec/optiga_config.h
new file mode 100644
index 0000000000..caeef1efa3
--- /dev/null
+++ b/core/embed/sec/optiga/inc/sec/optiga_config.h
@@ -0,0 +1,28 @@
+/*
+ * This file is part of the Trezor project, https://trezor.io/
+ *
+ * Copyright (c) SatoshiLabs
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#ifdef KERNEL_MODE
+
+// Initializes the optiga driver, establishes a secure channel by providing
+// a shared secret and finally opens the application.
+void optiga_init_and_configure(void);
+
+#endif  // KERNEL_MODE
diff --git a/core/embed/sec/optiga/inc/sec/optiga_hal.h b/core/embed/sec/optiga/inc/sec/optiga_hal.h
index c744c1c09b..f581a9e6e0 100644
--- a/core/embed/sec/optiga/inc/sec/optiga_hal.h
+++ b/core/embed/sec/optiga/inc/sec/optiga_hal.h
@@ -1,3 +1,21 @@
+/*
+ * This file is part of the Trezor project, https://trezor.io/
+ *
+ * Copyright (c) SatoshiLabs
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
 
 #ifndef CORE_OPTIGA_HAL_H
 #define CORE_OPTIGA_HAL_H
@@ -6,6 +24,8 @@
 
 void optiga_hal_init(void);
 
+void optiga_hal_deinit(void);
+
 void optiga_reset(void);
 
 #endif  // CORE_OPTIGA_HAL_H
diff --git a/core/embed/sec/optiga/inc/sec/optiga_transport.h b/core/embed/sec/optiga/inc/sec/optiga_transport.h
index 3d9b914f9c..8ddb3c5a3b 100644
--- a/core/embed/sec/optiga/inc/sec/optiga_transport.h
+++ b/core/embed/sec/optiga/inc/sec/optiga_transport.h
@@ -31,6 +31,8 @@
 #define OPTIGA_MAX_APDU_SIZE 1557
 
 optiga_result optiga_init(void);
+void optiga_deinit(void);
+
 optiga_result optiga_sec_chan_handshake(const uint8_t *secret,
                                         size_t secret_size);
 optiga_result optiga_execute_command(const uint8_t *command_data,
diff --git a/core/embed/sec/optiga/optiga_config.c b/core/embed/sec/optiga/optiga_config.c
new file mode 100644
index 0000000000..09de70202b
--- /dev/null
+++ b/core/embed/sec/optiga/optiga_config.c
@@ -0,0 +1,76 @@
+/*
+ * This file is part of the Trezor project, https://trezor.io/
+ *
+ * Copyright (c) SatoshiLabs
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <trezor_rtl.h>
+
+#include <sec/optiga.h>
+#include <sec/optiga_commands.h>
+#include <sec/optiga_transport.h>
+#include <sec/secret.h>
+#include <sys/systick.h>
+
+#include "memzero.h"
+
+#ifdef KERNEL_MODE
+
+#ifdef USE_OPTIGA_LOGGING
+#include <inttypes.h>
+#if 1  // color log
+#define OPTIGA_LOG_FORMAT \
+  "%" PRIu32 " \x1b[35moptiga\x1b[0m \x1b[32mDEBUG\x1b[0m %s: "
+#else
+#define OPTIGA_LOG_FORMAT "%" PRIu32 " optiga DEBUG %s: "
+#endif
+static void optiga_log_hex(const char *prefix, const uint8_t *data,
+                           size_t data_size) {
+  printf(OPTIGA_LOG_FORMAT, hal_ticks_ms() * 1000, prefix);
+  for (size_t i = 0; i < data_size; i++) {
+    printf("%02x", data[i]);
+  }
+  printf("\n");
+}
+#endif
+
+void optiga_init_and_configure(void) {
+#ifdef USE_OPTIGA_LOGGING
+  // command log is relatively quiet so we enable it in debug builds
+  optiga_command_set_log_hex(optiga_log_hex);
+  // transport log can be spammy, uncomment if you want it:
+  // optiga_transport_set_log_hex(optiga_log_hex);
+#endif
+
+  optiga_init();
+
+  uint8_t secret[SECRET_OPTIGA_KEY_LEN] = {0};
+  secbool secret_ok = secret_optiga_get(secret);
+
+  if (sectrue == secret_ok) {
+    // If the shielded connection cannot be established, reset Optiga and
+    // continue without it. In this case, OID_KEY_FIDO and OID_KEY_DEV cannot be
+    // used, which means device and FIDO attestation will not work.
+    if (optiga_sec_chan_handshake(secret, sizeof(secret)) != OPTIGA_SUCCESS) {
+      optiga_soft_reset();
+    }
+  }
+  memzero(secret, sizeof(secret));
+  ensure(sectrue * (optiga_open_application() == OPTIGA_SUCCESS),
+         "Cannot initialize optiga.");
+}
+
+#endif  // KERNEL_MODE
diff --git a/core/embed/sec/optiga/optiga_transport.c b/core/embed/sec/optiga/optiga_transport.c
index 4b3011e38c..aaa7416a95 100644
--- a/core/embed/sec/optiga/optiga_transport.c
+++ b/core/embed/sec/optiga/optiga_transport.c
@@ -200,6 +200,25 @@ optiga_result optiga_init(void) {
   return optiga_set_data_reg_len(OPTIGA_DATA_REG_LEN);
 }
 
+void optiga_deinit(void) {
+  i2c_bus_close(i2c_bus);
+  i2c_bus = NULL;
+
+  frame_num_out = 0xff;
+  frame_num_in = 0xff;
+  memzero(frame_buffer, sizeof(frame_buffer));
+
+  sec_chan_established = false;
+  memzero(&sec_chan_encr_ctx, sizeof(sec_chan_encr_ctx));
+  memzero(&sec_chan_decr_ctx, sizeof(sec_chan_decr_ctx));
+  memzero(sec_chan_encr_nonce, sizeof(sec_chan_encr_nonce));
+  memzero(sec_chan_decr_nonce, sizeof(sec_chan_decr_nonce));
+  memzero(sec_chan_buffer, sizeof(sec_chan_buffer));
+  sec_chan_size = 0;
+
+  optiga_hal_deinit();
+}
+
 static optiga_result optiga_i2c_write(const uint8_t *data, uint16_t data_size) {
   OPTIGA_LOG(">>>", data, data_size)
 
diff --git a/core/embed/sec/optiga/stm32/optiga_hal.c b/core/embed/sec/optiga/stm32/optiga_hal.c
index 7cc5919d16..607c312fbf 100644
--- a/core/embed/sec/optiga/stm32/optiga_hal.c
+++ b/core/embed/sec/optiga/stm32/optiga_hal.c
@@ -38,6 +38,24 @@ void optiga_hal_init(void) {
   hal_delay(20);
 }
 
+void optiga_hal_deinit(void) {
+  GPIO_InitTypeDef GPIO_InitStructure = {0};
+
+  GPIO_InitStructure.Mode = GPIO_MODE_ANALOG;
+  GPIO_InitStructure.Pull = GPIO_NOPULL;
+  GPIO_InitStructure.Speed = GPIO_SPEED_FREQ_LOW;
+  GPIO_InitStructure.Pin = OPTIGA_RST_PIN;
+  HAL_GPIO_Init(OPTIGA_RST_PORT, &GPIO_InitStructure);
+
+#ifdef OPTIGA_PWR_PIN
+  GPIO_InitStructure.Mode = GPIO_MODE_ANALOG;
+  GPIO_InitStructure.Pull = GPIO_NOPULL;
+  GPIO_InitStructure.Speed = GPIO_SPEED_FREQ_LOW;
+  GPIO_InitStructure.Pin = OPTIGA_PWR_PIN;
+  HAL_GPIO_Init(OPTIGA_PWR_PORT, &GPIO_InitStructure);
+#endif
+}
+
 void optiga_reset(void) {
   HAL_GPIO_WritePin(OPTIGA_RST_PORT, OPTIGA_RST_PIN, GPIO_PIN_RESET);
   hal_delay(10);
diff --git a/core/embed/sec/optiga/unix/optiga_hal.c b/core/embed/sec/optiga/unix/optiga_hal.c
index 9bf346f028..6a817db42e 100644
--- a/core/embed/sec/optiga/unix/optiga_hal.c
+++ b/core/embed/sec/optiga/unix/optiga_hal.c
@@ -21,6 +21,10 @@ void optiga_hal_init(void) {
   // nothing to do
 }
 
+void optiga_hal_deinit(void) {
+  // nothing to do
+}
+
 void optiga_reset(void) {
   // nothing to do
 }
diff --git a/core/embed/sys/powerctl/stm32u5/powerctl_suspend.c b/core/embed/sys/powerctl/stm32u5/powerctl_suspend.c
index 72188d94f6..b5ed21cef4 100644
--- a/core/embed/sys/powerctl/stm32u5/powerctl_suspend.c
+++ b/core/embed/sys/powerctl/stm32u5/powerctl_suspend.c
@@ -25,6 +25,11 @@
 #include <sys/irq.h>
 #include <sys/wakeup_flags.h>
 
+#ifdef USE_OPTIGA
+#include <sec/optiga_config.h>
+#include <sec/optiga_transport.h>
+#endif
+
 #ifdef USE_TOUCH
 #include <io/touch.h>
 #endif
@@ -54,6 +59,9 @@ void powerctl_suspend(void) {
 
   // Deinitialize all drivers that are not required in low-power mode
   // (e.g., USB, display, touch, haptic, etc.).
+#ifdef USE_OPTIGA
+  optiga_deinit();
+#endif
 #ifdef USE_USB
   usb_stop();
 #endif
@@ -130,6 +138,9 @@ void powerctl_suspend(void) {
 #ifdef USE_USB
   usb_start();
 #endif
+#ifdef USE_OPTIGA
+  optiga_init_and_configure();
+#endif
 }
 
 #endif  // KERNEL_MODE
diff --git a/core/site_scons/models/T2B1/trezor_r_v10.py b/core/site_scons/models/T2B1/trezor_r_v10.py
index e4031c3975..98eb84a501 100644
--- a/core/site_scons/models/T2B1/trezor_r_v10.py
+++ b/core/site_scons/models/T2B1/trezor_r_v10.py
@@ -89,6 +89,7 @@ def configure(
         sources += ["embed/sec/optiga/stm32/optiga_hal.c"]
         sources += ["embed/sec/optiga/optiga.c"]
         sources += ["embed/sec/optiga/optiga_commands.c"]
+        sources += ["embed/sec/optiga/optiga_config.c"]
         sources += ["embed/sec/optiga/optiga_transport.c"]
         sources += ["vendor/trezor-crypto/hash_to_curve.c"]
         paths += ["embed/io/i2c_bus/inc"]
diff --git a/core/site_scons/models/T3B1/trezor_t3b1_revB.py b/core/site_scons/models/T3B1/trezor_t3b1_revB.py
index a734ae63fe..15c54182cb 100644
--- a/core/site_scons/models/T3B1/trezor_t3b1_revB.py
+++ b/core/site_scons/models/T3B1/trezor_t3b1_revB.py
@@ -80,6 +80,7 @@ def configure(
         sources += ["embed/sec/optiga/stm32/optiga_hal.c"]
         sources += ["embed/sec/optiga/optiga.c"]
         sources += ["embed/sec/optiga/optiga_commands.c"]
+        sources += ["embed/sec/optiga/optiga_config.c"]
         sources += ["embed/sec/optiga/optiga_transport.c"]
         sources += ["vendor/trezor-crypto/hash_to_curve.c"]
         paths += ["embed/io/i2c_bus/inc"]
diff --git a/core/site_scons/models/T3T1/trezor_t3t1_revE.py b/core/site_scons/models/T3T1/trezor_t3t1_revE.py
index 9aa2b9ea8d..709606b9e6 100644
--- a/core/site_scons/models/T3T1/trezor_t3t1_revE.py
+++ b/core/site_scons/models/T3T1/trezor_t3t1_revE.py
@@ -121,6 +121,7 @@ def configure(
         sources += ["embed/sec/optiga/stm32/optiga_hal.c"]
         sources += ["embed/sec/optiga/optiga.c"]
         sources += ["embed/sec/optiga/optiga_commands.c"]
+        sources += ["embed/sec/optiga/optiga_config.c"]
         sources += ["embed/sec/optiga/optiga_transport.c"]
         sources += ["vendor/trezor-crypto/hash_to_curve.c"]
         paths += ["embed/sec/optiga/inc"]
diff --git a/core/site_scons/models/T3W1/trezor_t3w1_revA.py b/core/site_scons/models/T3W1/trezor_t3w1_revA.py
index 2eb7b9d8f2..43348ec0b7 100644
--- a/core/site_scons/models/T3W1/trezor_t3w1_revA.py
+++ b/core/site_scons/models/T3W1/trezor_t3w1_revA.py
@@ -98,6 +98,7 @@ def configure(
         sources += ["embed/sec/optiga/stm32/optiga_hal.c"]
         sources += ["embed/sec/optiga/optiga.c"]
         sources += ["embed/sec/optiga/optiga_commands.c"]
+        sources += ["embed/sec/optiga/optiga_config.c"]
         sources += ["embed/sec/optiga/optiga_transport.c"]
         sources += ["vendor/trezor-crypto/hash_to_curve.c"]
         paths += ["embed/sec/optiga/inc"]
diff --git a/core/site_scons/models/T3W1/trezor_t3w1_revA0.py b/core/site_scons/models/T3W1/trezor_t3w1_revA0.py
index b247b6bafe..3af1f067ca 100644
--- a/core/site_scons/models/T3W1/trezor_t3w1_revA0.py
+++ b/core/site_scons/models/T3W1/trezor_t3w1_revA0.py
@@ -97,6 +97,7 @@ def configure(
         sources += ["embed/sec/optiga/stm32/optiga_hal.c"]
         sources += ["embed/sec/optiga/optiga.c"]
         sources += ["embed/sec/optiga/optiga_commands.c"]
+        sources += ["embed/sec/optiga/optiga_config.c"]
         sources += ["embed/sec/optiga/optiga_transport.c"]
         sources += ["vendor/trezor-crypto/hash_to_curve.c"]
         paths += ["embed/sec/optiga/inc"]