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

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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>
This commit is contained in:
Michael Walle 2021-10-15 15:15:19 +02:00 • committed by Priyanka Jain
parent bce039acf2
commit f53e102e12
1 changed files with 13 additions and 15 deletions
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28
arch/arm/cpu/armv8/fsl-layerscape/soc.c
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@ -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);