From: Lukas Funke <lukas.fu...@weidmueller.com>
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.fu...@weidmueller.com>
---
Changes in v3:
- Use 'ZYNQMP_PM_RESET_SOFT' directly
- Add comment on what happens if CONFIG_ZYNQMP_FIRMWARE is not enabled
Changes in v2:
- Drop 2/2 since reworking ZYNQMP_FIRMWARE dependency is out-of-scope
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 f370fb7347a..c37c198ec55 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
--
2.30.2
