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@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 }