armv8: fsl-layerscape: rework the dwc3 snooping enable code

Instead of looking at all USB (host) devices, just search all DWC3
device tree nodes. This will (1) fix a panic if of_match is zero and (2)
also apply the fixup if the controller is in peripheral mode. Both
happen when the DWC3 USB controller driver is used.

Signed-off-by: Michael Walle <michael@walle.cc>
Reviewed-by: Priyanka Jain <priyanka.jain@nxp.com>

diff --git a/arch/arm/cpu/armv8/fsl-layerscape/soc.c b/arch/arm/cpu/armv8/fsl-layerscape/soc.c
index a08ed3f..d3a5cfa 100644 (file)
--- a/arch/arm/cpu/armv8/fsl-layerscape/soc.c
+++ b/arch/arm/cpu/armv8/fsl-layerscape/soc.c
@@ -929,25 +929,23 @@ __weak int fsl_board_late_init(void)
 #define DWC3_GSBUSCFG0_CACHETYPE(n)        (((n) & 0xffff)            \
        << DWC3_GSBUSCFG0_CACHETYPE_SHIFT)
 
-void enable_dwc3_snooping(void)
+static void enable_dwc3_snooping(void)
 {
-       int ret;
-       u32 val;
-       struct udevice *bus;
-       struct uclass *uc;
+       static const char * const compatibles[] = {
+           "fsl,layerscape-dwc3",
+           "fsl,ls1028a-dwc3",
+       };
        fdt_addr_t dwc3_base;
+       ofnode node;
+       u32 val;
+       int i;
 
-       ret = uclass_get(UCLASS_USB, &uc);
-       if (ret)
-               return;
-
-       uclass_foreach_dev(bus, uc) {
-               if (!strcmp(bus->driver->of_match->compatible, "fsl,layerscape-dwc3")) {
-                       dwc3_base = devfdt_get_addr(bus);
-                       if (dwc3_base == FDT_ADDR_T_NONE) {
-                               dev_err(bus, "dwc3 regs missing\n");
+       for (i = 0; i < ARRAY_SIZE(compatibles); i++) {
+               ofnode_for_each_compatible_node(node, compatibles[i]) {
+                       dwc3_base = ofnode_get_addr(node);
+                       if (dwc3_base == FDT_ADDR_T_NONE)
                                continue;
-                       }
+
                        val = in_le32(dwc3_base + DWC3_GSBUSCFG0);
                        val &= ~DWC3_GSBUSCFG0_CACHETYPE(~0);
                        val |= DWC3_GSBUSCFG0_CACHETYPE(0x2222);