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authorRob Herring <robh@kernel.org>2020-02-06 14:01:05 +0000
committerRob Herring <robh@kernel.org>2020-02-14 14:25:26 -0600
commitbc5e522ec47174770a75df0a76d90f9ebb20132e (patch)
tree95d68604be1cbe3cc965f8ba62a2c906f55c4f8d /drivers/of/address.c
parentc67f3df88ffca45531a12214e8faffbdab1fa422 (diff)
downloadlinux-bc5e522ec47174770a75df0a76d90f9ebb20132e.tar.bz2
of/address: Rework of_pci_range parsing for non-PCI buses
The only PCI specific part of of_pci_range_parser_one() is the handling of the 3rd address cell. Rework it to work on regular 1 and 2 cell addresses. Use defines and a union to avoid a treewide renaming of the parsing helpers and struct. Signed-off-by: Rob Herring <robh@kernel.org>
Diffstat (limited to 'drivers/of/address.c')
-rw-r--r--drivers/of/address.c33
1 files changed, 21 insertions, 12 deletions
diff --git a/drivers/of/address.c b/drivers/of/address.c
index 5d608d7c10d6..6d33f849f114 100644
--- a/drivers/of/address.c
+++ b/drivers/of/address.c
@@ -694,12 +694,12 @@ EXPORT_SYMBOL(of_get_address);
static int parser_init(struct of_pci_range_parser *parser,
struct device_node *node, const char *name)
{
- const int na = 3, ns = 2;
int rlen;
parser->node = node;
parser->pna = of_n_addr_cells(node);
- parser->np = parser->pna + na + ns;
+ parser->na = of_bus_n_addr_cells(node);
+ parser->ns = of_bus_n_size_cells(node);
parser->dma = !strcmp(name, "dma-ranges");
parser->range = of_get_property(node, name, &rlen);
@@ -724,20 +724,28 @@ int of_pci_dma_range_parser_init(struct of_pci_range_parser *parser,
return parser_init(parser, node, "dma-ranges");
}
EXPORT_SYMBOL_GPL(of_pci_dma_range_parser_init);
+#define of_dma_range_parser_init of_pci_dma_range_parser_init
struct of_pci_range *of_pci_range_parser_one(struct of_pci_range_parser *parser,
struct of_pci_range *range)
{
- const int na = 3, ns = 2;
+ int na = parser->na;
+ int ns = parser->ns;
+ int np = parser->pna + na + ns;
if (!range)
return NULL;
- if (!parser->range || parser->range + parser->np > parser->end)
+ if (!parser->range || parser->range + np > parser->end)
return NULL;
- range->flags = of_bus_pci_get_flags(parser->range);
- range->pci_addr = of_read_number(parser->range + 1, ns);
+ if (parser->na == 3)
+ range->flags = of_bus_pci_get_flags(parser->range);
+ else
+ range->flags = 0;
+
+ range->pci_addr = of_read_number(parser->range, na);
+
if (parser->dma)
range->cpu_addr = of_translate_dma_address(parser->node,
parser->range + na);
@@ -746,15 +754,16 @@ struct of_pci_range *of_pci_range_parser_one(struct of_pci_range_parser *parser,
parser->range + na);
range->size = of_read_number(parser->range + parser->pna + na, ns);
- parser->range += parser->np;
+ parser->range += np;
/* Now consume following elements while they are contiguous */
- while (parser->range + parser->np <= parser->end) {
- u32 flags;
+ while (parser->range + np <= parser->end) {
+ u32 flags = 0;
u64 pci_addr, cpu_addr, size;
- flags = of_bus_pci_get_flags(parser->range);
- pci_addr = of_read_number(parser->range + 1, ns);
+ if (parser->na == 3)
+ flags = of_bus_pci_get_flags(parser->range);
+ pci_addr = of_read_number(parser->range, na);
if (parser->dma)
cpu_addr = of_translate_dma_address(parser->node,
parser->range + na);
@@ -770,7 +779,7 @@ struct of_pci_range *of_pci_range_parser_one(struct of_pci_range_parser *parser,
break;
range->size += size;
- parser->range += parser->np;
+ parser->range += np;
}
return range;