feat(imx8mq): add the dram retention support for imx8mq
Add the dram retention support for i.MX8MQ. As there is
no enough ocram space available before entering TF-A,
so the timing info need to be copied from dram into ocram.
Signed-off-by: Jacky Bai <ping.bai@nxp.com>
Change-Id: Id8264c342fd62e297b1969cba5ed505450c78a25
diff --git a/plat/imx/imx8m/imx8mq/imx8mq_psci.c b/plat/imx/imx8m/imx8mq/imx8mq_psci.c
index 01582af..6209fea 100644
--- a/plat/imx/imx8m/imx8mq/imx8mq_psci.c
+++ b/plat/imx/imx8m/imx8mq/imx8mq_psci.c
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2018, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2018-2023, ARM Limited and Contributors. All rights reserved.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
@@ -12,6 +12,7 @@
#include <lib/mmio.h>
#include <lib/psci/psci.h>
+#include <dram.h>
#include <gpc.h>
#include <imx8m_psci.h>
#include <plat_imx8.h>
@@ -63,6 +64,7 @@
if (is_local_state_retn(SYSTEM_PWR_STATE(target_state))) {
imx_set_sys_lpm(core_id, true);
+ dram_enter_retention();
}
}
@@ -73,6 +75,7 @@
/* check the system level status */
if (is_local_state_retn(SYSTEM_PWR_STATE(target_state))) {
+ dram_exit_retention();
imx_set_sys_lpm(core_id, false);
imx_clear_rbc_count();
}