[U-Boot] [PATCH] armv8/fsl-layerscape: add IFC fixup for LS1043A with QSPI enabled

[Gong Qianyu]

QSPI and IFC are pin-multiplexed on LS1043A. So if QSPI is enabled,
IFC should be disabled.
But just disable IFC driver in LS1043A Linux is not enough because
mdio-mux will access IFC address space -- actually it accesses FPGA
which is connected to IFC CS3. So disable the whole IFC node in
Linux device tree.

Signed-off-by: Gong Qianyu <Qianyu.Gong at nxp.com>

diff --git a/arch/arm/cpu/armv8/fsl-layerscape/fdt.c b/arch/arm/cpu/armv8/fsl-layerscape/fdt.c
index 4e4861d..5bb3048 100644
--- a/arch/arm/cpu/armv8/fsl-layerscape/fdt.c
+++ b/arch/arm/cpu/armv8/fsl-layerscape/fdt.c
@@ -204,4 +204,11 @@ void ft_cpu_setup(void *blob, bd_t *bd)
 #ifdef CONFIG_FSL_LSCH3
 	fdt_fixup_smmu(blob);
 #endif
+
+#ifdef CONFIG_LS1043A
+#ifdef CONFIG_FSL_QSPI
+	do_fixup_by_compat(blob, "fsl,ifc",
+			   "status", "disabled", 8 + 1, 1);
+#endif
+#endif
 }
-- 
2.1.0.27.g96db324