powerpc/44x: Use for_each_of_range() iterator

Simplify the ppc44x PCI dma-ranges parsing to use the
for_each_of_range() iterator.

Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://patch.msgid.link/20241106212640.341677-1-robh@kernel.org

diff --git a/arch/powerpc/platforms/44x/pci.c b/arch/powerpc/platforms/44x/pci.c
index db6d33c..364aeb8 100644 (file)
--- a/arch/powerpc/platforms/44x/pci.c
+++ b/arch/powerpc/platforms/44x/pci.c
@@ -94,10 +94,8 @@ static int __init ppc4xx_parse_dma_ranges(struct pci_controller *hose,
                                          struct resource *res)
 {
        u64 size;
-       const u32 *ranges;
-       int rlen;
-       int pna = of_n_addr_cells(hose->dn);
-       int np = pna + 5;
+       struct of_range_parser parser;
+       struct of_range range;
 
        /* Default */
        res->start = 0;
@@ -105,18 +103,15 @@ static int __init ppc4xx_parse_dma_ranges(struct pci_controller *hose,
        res->end = size - 1;
        res->flags = IORESOURCE_MEM | IORESOURCE_PREFETCH;
 
-       /* Get dma-ranges property */
-       ranges = of_get_property(hose->dn, "dma-ranges", &rlen);
-       if (ranges == NULL)
+       if (of_pci_dma_range_parser_init(&parser, hose->dn))
                goto out;
 
-       /* Walk it */
-       while ((rlen -= np * 4) >= 0) {
-               u32 pci_space = ranges[0];
-               u64 pci_addr = of_read_number(ranges + 1, 2);
-               u64 cpu_addr = of_translate_dma_address(hose->dn, ranges + 3);
-               size = of_read_number(ranges + pna + 3, 2);
-               ranges += np;
+       for_each_of_range(&parser, &range) {
+               u32 pci_space = range.flags;
+               u64 pci_addr = range.bus_addr;
+               u64 cpu_addr = range.cpu_addr;
+               size = range.size;
+
                if (cpu_addr == OF_BAD_ADDR || size == 0)
                        continue;