imx: imx8qx: add system off support
Add system power off support for i.MX8QX,
when Linux kernel issues "poweroff" command,
TF-A will send command to inform system
controller to power off whole board according
to board design, tested on i.MX8QX MEK board.
Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
diff --git a/plat/imx/common/imx8_psci.c b/plat/imx/common/imx8_psci.c
new file mode 100644
index 0000000..0b0dcb5
--- /dev/null
+++ b/plat/imx/common/imx8_psci.c
@@ -0,0 +1,22 @@
+/*
+ * Copyright (c) 2018, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <arch.h>
+#include <arch_helpers.h>
+#include <debug.h>
+#include <plat_imx8.h>
+#include <sci/sci.h>
+#include <stdbool.h>
+
+void __dead2 imx_system_off(void)
+{
+ sc_pm_set_sys_power_mode(ipc_handle, SC_PM_PW_MODE_OFF);
+ wfi();
+ ERROR("power off failed.\n");
+ panic();
+}
+
+