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

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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) <robh@kernel.org>
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Link: https://patch.msgid.link/20241107153255.2740610-1-robh@kernel.org
This commit is contained in:
Rob Herring (Arm) 2024-11-07 09:32:55 -06:00 committed by Manivannan Sadhasivam
parent 0af2f6be1b
commit 5da3d94a23
1 changed files with 9 additions and 17 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

26
drivers/pci/controller/pci-mvebu.c
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@ -1179,37 +1179,29 @@ static int mvebu_get_tgt_attr(struct device_node *np, int devfn,
unsigned int *tgt, unsigned int *tgt,
unsigned int *attr) unsigned int *attr)
{ {
const int na = 3, ns = 2; struct of_range range;
const __be32 *range; struct of_range_parser parser;
int rlen, nranges, rangesz, pna, i;
*tgt = -1; *tgt = -1;
*attr = -1; *attr = -1;
range = of_get_property(np, "ranges", &rlen); if (of_pci_range_parser_init(&parser, np))
if (!range)
return -EINVAL; return -EINVAL;
pna = of_n_addr_cells(np); for_each_of_range(&parser, &range) {
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);
unsigned long rtype; 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; 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; rtype = IORESOURCE_MEM;
else else
continue; continue;
if (slot == PCI_SLOT(devfn) && type == rtype) { if (slot == PCI_SLOT(devfn) && type == rtype) {
*tgt = DT_CPUADDR_TO_TARGET(cpuaddr); *tgt = DT_CPUADDR_TO_TARGET(range.cpu_addr);
*attr = DT_CPUADDR_TO_ATTR(cpuaddr); *attr = DT_CPUADDR_TO_ATTR(range.cpu_addr);
return 0; return 0;
} }
} }