zynqmp: Make MMIO write FW call synchronous
We must guarantee that writes have become effective before returning to
the caller. Hence, wait for PMUFW signaling completion of the FW call
before returning to the rich OS.
Signed-off-by: Soren Brinkmann <soren.brinkmann@xilinx.com>
diff --git a/plat/xilinx/zynqmp/pm_service/pm_api_sys.c b/plat/xilinx/zynqmp/pm_service/pm_api_sys.c
index efadbd2..e859ee3 100644
--- a/plat/xilinx/zynqmp/pm_service/pm_api_sys.c
+++ b/plat/xilinx/zynqmp/pm_service/pm_api_sys.c
@@ -476,7 +476,7 @@
/* Send request to the PMU */
PM_PACK_PAYLOAD4(payload, PM_MMIO_WRITE, address, mask, value);
- return pm_ipi_send(primary_proc, payload);
+ return pm_ipi_send_sync(primary_proc, payload, NULL);
}
/**