PCI: mvebu: Use for_each_of_range() iterator for parsing "ranges"

The mvebu "ranges" is a bit unusual with its own encoding of addresses,
but it's still just normal "ranges" as far as parsing is concerned.
Convert mvebu_get_tgt_attr() to use the for_each_of_range() iterator
instead of open coding the parsing.

Signed-off-by: Rob Herring (Arm) <[email protected]>
Signed-off-by: Manivannan Sadhasivam <[email protected]>
Reviewed-by: Manivannan Sadhasivam <[email protected]>
Link: https://patch.msgid.link/[email protected]

Author: robherring

drivers/pci/controller/pci-mvebu.c

@@ -1179,37 +1179,29 @@ static int mvebu_get_tgt_attr(struct device_node *np, int devfn,
 			      unsigned int *tgt,
 			      unsigned int *attr)
 {
-	const int na = 3, ns = 2;
-	const __be32 *range;
-	int rlen, nranges, rangesz, pna, i;
+	struct of_range range;
+	struct of_range_parser parser;
 
 	*tgt = -1;
 	*attr = -1;
 
-	range = of_get_property(np, "ranges", &rlen);
-	if (!range)
+	if (of_pci_range_parser_init(&parser, np))
 		return -EINVAL;
 
-	pna = of_n_addr_cells(np);
-	rangesz = pna + na + ns;
-	nranges = rlen / sizeof(__be32) / rangesz;
-
-	for (i = 0; i < nranges; i++, range += rangesz) {
-		u32 flags = of_read_number(range, 1);
-		u32 slot = of_read_number(range + 1, 1);
-		u64 cpuaddr = of_read_number(range + na, pna);
+	for_each_of_range(&parser, &range) {
 		unsigned long rtype;
+		u32 slot = upper_32_bits(range.bus_addr);
 
-		if (DT_FLAGS_TO_TYPE(flags) == DT_TYPE_IO)
+		if (DT_FLAGS_TO_TYPE(range.flags) == DT_TYPE_IO)
 			rtype = IORESOURCE_IO;
-		else if (DT_FLAGS_TO_TYPE(flags) == DT_TYPE_MEM32)
+		else if (DT_FLAGS_TO_TYPE(range.flags) == DT_TYPE_MEM32)
 			rtype = IORESOURCE_MEM;
 		else
 			continue;
 
 		if (slot == PCI_SLOT(devfn) && type == rtype) {
-			*tgt = DT_CPUADDR_TO_TARGET(cpuaddr);
-			*attr = DT_CPUADDR_TO_ATTR(cpuaddr);
+			*tgt = DT_CPUADDR_TO_TARGET(range.cpu_addr);
+			*attr = DT_CPUADDR_TO_ATTR(range.cpu_addr);
 			return 0;
 		}
 	}