soc: arm: nxp_imx: rt5xx: add support for power off

Implement support for sys_poweroff(). Code re-used from the PM SOFT_OFF implementation. Signed-off-by: Gerard Marull-Paretas <gerard@teslabs.com>
pengxy · Aug 4, 2023 · b5d05e9 · b5d05e9
1 parent 96b3827
commit b5d05e9
Show file tree

Hide file tree

Showing 3 changed files with 26 additions and 0 deletions.
diff --git a/soc/arm/nxp_imx/rt5xx/CMakeLists.txt b/soc/arm/nxp_imx/rt5xx/CMakeLists.txt
@@ -15,6 +15,8 @@ zephyr_sources(
 
 zephyr_sources_ifdef(CONFIG_PM power.c)
 
+zephyr_sources_ifdef(CONFIG_POWEROFF poweroff.c)
+
 zephyr_library_include_directories(
   ${ZEPHYR_BASE}/kernel/include
   ${ZEPHYR_BASE}/arch/${ARCH}/include

diff --git a/soc/arm/nxp_imx/rt5xx/Kconfig.series b/soc/arm/nxp_imx/rt5xx/Kconfig.series
@@ -11,5 +11,6 @@ config SOC_SERIES_IMX_RT5XX
 	select SOC_FAMILY_IMX
 	select CLOCK_CONTROL
 	select HAS_PM
+	select HAS_POWEROFF
 	help
 	  Enable support for i.MX RT5XX Series MCU series
diff --git a/soc/arm/nxp_imx/rt5xx/poweroff.c b/soc/arm/nxp_imx/rt5xx/poweroff.c
@@ -0,0 +1,23 @@
+/*
+ * Copyright (c) 2023 Nordic Semiconductor ASA
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <zephyr/sys/poweroff.h>
+#include <zephyr/toolchain.h>
+
+#include <fsl_power.h>
+
+static const uint32_t exclude_from_pd[] = {0, 0, 0, 0};
+
+void z_sys_poweroff(void)
+{
+	/* Disable ISP Pin pull-ups and input buffers to avoid current leakage */
+	IOPCTL->PIO[1][15] = 0;
+	IOPCTL->PIO[3][28] = 0;
+	IOPCTL->PIO[3][29] = 0;
+
+	POWER_EnterDeepPowerDown(exclude_from_pd);
+
+	CODE_UNREACHABLE;
+}