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 <[email protected]>

diff --git a/plat/xilinx/zynqmp/pm_service/pm_api_sys.c b/plat/xilinx/zynqmp/pm_service/pm_api_sys.c
index efadbd200ee19346b0337ab2227ae41ea21df027..e859ee39ee18afe9ea7c4fe06e332187be656809 100644 (file)
--- a/plat/xilinx/zynqmp/pm_service/pm_api_sys.c
+++ b/plat/xilinx/zynqmp/pm_service/pm_api_sys.c
@@ -476,7 +476,7 @@ enum pm_ret_status pm_mmio_write(uintptr_t address,
 
        /* 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);
 }
 
 /**