From bb0e580be46b8c7ca97b8c34d96fd718119a21b1 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Martin=20J=C3=A4ger?= <martin@libre.solar>
Date: Tue, 29 Apr 2025 22:39:12 +0200
Subject: [PATCH] soc: stm32g0x: add poweroff implementation
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Same implementation as stm32c0x and stm32l4x. This is required
for wake-up from sleep.

Signed-off-by: Martin Jäger <martin@libre.solar>
---
 soc/st/stm32/stm32g0x/CMakeLists.txt |  5 ++---
 soc/st/stm32/stm32g0x/Kconfig        |  1 +
 soc/st/stm32/stm32g0x/poweroff.c     | 33 ++++++++++++++++++++++++++++
 3 files changed, 36 insertions(+), 3 deletions(-)
 create mode 100644 soc/st/stm32/stm32g0x/poweroff.c

diff --git a/soc/st/stm32/stm32g0x/CMakeLists.txt b/soc/st/stm32/stm32g0x/CMakeLists.txt
index 65706e73bfa..492cb808f8e 100644
--- a/soc/st/stm32/stm32g0x/CMakeLists.txt
+++ b/soc/st/stm32/stm32g0x/CMakeLists.txt
@@ -6,9 +6,8 @@ zephyr_sources(
   soc.c
   )
 
-zephyr_sources_ifdef(CONFIG_PM
-  power.c
-  )
+zephyr_sources_ifdef(CONFIG_PM power.c)
+zephyr_sources_ifdef(CONFIG_POWEROFF poweroff.c)
 
 zephyr_include_directories(.)
 
diff --git a/soc/st/stm32/stm32g0x/Kconfig b/soc/st/stm32/stm32g0x/Kconfig
index 7361bef642c..0a551904f60 100644
--- a/soc/st/stm32/stm32g0x/Kconfig
+++ b/soc/st/stm32/stm32g0x/Kconfig
@@ -12,4 +12,5 @@ config SOC_SERIES_STM32G0X
 	select HAS_STM32CUBE
 	select CPU_CORTEX_M_HAS_SYSTICK
 	select HAS_PM
+	select HAS_POWEROFF
 	select SOC_EARLY_INIT_HOOK
diff --git a/soc/st/stm32/stm32g0x/poweroff.c b/soc/st/stm32/stm32g0x/poweroff.c
new file mode 100644
index 00000000000..1e6589167ad
--- /dev/null
+++ b/soc/st/stm32/stm32g0x/poweroff.c
@@ -0,0 +1,33 @@
+/*
+ * Copyright (c) 2023 Nordic Semiconductor ASA
+ * Copyright (c) 2024 STMicroelectronics
+ * Copyright (c) 2025 A Labs GmbH
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <zephyr/kernel.h>
+#include <zephyr/sys/poweroff.h>
+#include <zephyr/toolchain.h>
+#include <zephyr/drivers/misc/stm32_wkup_pins/stm32_wkup_pins.h>
+
+#include <stm32_ll_cortex.h>
+#include <stm32_ll_pwr.h>
+#include <stm32_ll_system.h>
+
+void z_sys_poweroff(void)
+{
+#ifdef CONFIG_STM32_WKUP_PINS
+	stm32_pwr_wkup_pin_cfg_pupd();
+
+	LL_PWR_ClearFlag_WU();
+#endif /* CONFIG_STM32_WKUP_PINS */
+
+	LL_PWR_SetPowerMode(LL_PWR_MODE_SHUTDOWN);
+	LL_LPM_EnableDeepSleep();
+	LL_DBGMCU_DisableDBGStandbyMode();
+
+	k_cpu_idle();
+
+	CODE_UNREACHABLE;
+}