From 081f3a19912174018f55c854c7b258cb2d511ce1 Mon Sep 17 00:00:00 2001
From: Lukas Funke <lukas.funke@weidmueller.com>
Date: Fri, 7 Jun 2024 11:26:08 +0200
Subject: [PATCH] xilinx: zynqmp: Enable reset_cpu() in SPL
This commit enables SPL to reset the CPU via PMU-firmware. The usual
reset mechanism requires bl31 to be loaded which may not be the case in
SPL.
Signed-off-by: Lukas Funke <lukas.funke@weidmueller.com>
Link: https://lore.kernel.org/r/20240607092608.712996-2-lukas.funke-oss@weidmueller.com
Signed-off-by: Michal Simek <michal.simek@amd.com>
---
board/xilinx/zynqmp/zynqmp.c | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/board/xilinx/zynqmp/zynqmp.c b/board/xilinx/zynqmp/zynqmp.c
index 63cc6b862e..b4c15b041c 100644
--- a/board/xilinx/zynqmp/zynqmp.c
+++ b/board/xilinx/zynqmp/zynqmp.c
@@ -285,6 +285,18 @@ int dram_init(void)
#if !CONFIG_IS_ENABLED(SYSRESET)
void reset_cpu(void)
{
+ if (!IS_ENABLED(CONFIG_ZYNQMP_FIRMWARE)) {
+ log_warning("reset failed: ZYNQMP_FIRMWARE disabled");
+ return;
+ }
+
+ /* In case of !CONFIG_ZYNQMP_FIRMWARE the call to 'xilinx_pm_request()'
+ * will be removed by the compiler due to the early return.
+ * If CONFIG_ZYNQMP_FIRMWARE is defined in SPL 'xilinx_pm_request()'
+ * will send command over IPI and requires pmufw to be present.
+ */
+ xilinx_pm_request(PM_RESET_ASSERT, ZYNQMP_PM_RESET_SOFT,
+ PM_RESET_ACTION_ASSERT, 0, 0, NULL);
}
#endif
--
2.39.5