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authorJiaxun Yang <jiaxun.yang@flygoat.com>2020-07-28 17:36:55 +0200
committerThomas Bogendoerfer <tsbogend@alpha.franken.de>2020-07-28 22:49:52 +0200
commit2f96593ecc37e98bf99525f0629128080533867f (patch)
treed99017087283702c58da0c75b24c5839ca8bed4c /drivers/of
parentmemory: jz4780-nemc: Do not build by default (diff)
downloadlinux-2f96593ecc37e98bf99525f0629128080533867f.tar.xz
linux-2f96593ecc37e98bf99525f0629128080533867f.zip
of_address: Add bus type match for pci ranges parser
So the parser can be used to parse range property of ISA bus. As they're all using PCI-like method of range property, there is no need start a new parser. Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com> Reviewed-by: Rob Herring <robh@kernel.org> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Diffstat (limited to 'drivers/of')
-rw-r--r--drivers/of/address.c29
1 files changed, 17 insertions, 12 deletions
diff --git a/drivers/of/address.c b/drivers/of/address.c
index 8eea3f6e29a4..813936d419ad 100644
--- a/drivers/of/address.c
+++ b/drivers/of/address.c
@@ -49,6 +49,7 @@ struct of_bus {
u64 (*map)(__be32 *addr, const __be32 *range,
int na, int ns, int pna);
int (*translate)(__be32 *addr, u64 offset, int na);
+ bool has_flags;
unsigned int (*get_flags)(const __be32 *addr);
};
@@ -364,6 +365,7 @@ static struct of_bus of_busses[] = {
.count_cells = of_bus_pci_count_cells,
.map = of_bus_pci_map,
.translate = of_bus_pci_translate,
+ .has_flags = true,
.get_flags = of_bus_pci_get_flags,
},
#endif /* CONFIG_PCI */
@@ -375,6 +377,7 @@ static struct of_bus of_busses[] = {
.count_cells = of_bus_isa_count_cells,
.map = of_bus_isa_map,
.translate = of_bus_isa_translate,
+ .has_flags = true,
.get_flags = of_bus_isa_get_flags,
},
/* Default */
@@ -698,9 +701,10 @@ static int parser_init(struct of_pci_range_parser *parser,
parser->node = node;
parser->pna = of_n_addr_cells(node);
- parser->na = of_bus_n_addr_cells(node);
- parser->ns = of_bus_n_size_cells(node);
parser->dma = !strcmp(name, "dma-ranges");
+ parser->bus = of_match_bus(node);
+
+ parser->bus->count_cells(parser->node, &parser->na, &parser->ns);
parser->range = of_get_property(node, name, &rlen);
if (parser->range == NULL)
@@ -732,6 +736,7 @@ struct of_pci_range *of_pci_range_parser_one(struct of_pci_range_parser *parser,
int na = parser->na;
int ns = parser->ns;
int np = parser->pna + na + ns;
+ int busflag_na = 0;
if (!range)
return NULL;
@@ -739,12 +744,13 @@ struct of_pci_range *of_pci_range_parser_one(struct of_pci_range_parser *parser,
if (!parser->range || parser->range + np > parser->end)
return NULL;
- if (parser->na == 3)
- range->flags = of_bus_pci_get_flags(parser->range);
- else
- range->flags = 0;
+ range->flags = parser->bus->get_flags(parser->range);
+
+ /* A extra cell for resource flags */
+ if (parser->bus->has_flags)
+ busflag_na = 1;
- range->pci_addr = of_read_number(parser->range, na);
+ range->bus_addr = of_read_number(parser->range + busflag_na, na - busflag_na);
if (parser->dma)
range->cpu_addr = of_translate_dma_address(parser->node,
@@ -759,11 +765,10 @@ struct of_pci_range *of_pci_range_parser_one(struct of_pci_range_parser *parser,
/* Now consume following elements while they are contiguous */
while (parser->range + np <= parser->end) {
u32 flags = 0;
- u64 pci_addr, cpu_addr, size;
+ u64 bus_addr, cpu_addr, size;
- if (parser->na == 3)
- flags = of_bus_pci_get_flags(parser->range);
- pci_addr = of_read_number(parser->range, na);
+ flags = parser->bus->get_flags(parser->range);
+ bus_addr = of_read_number(parser->range + busflag_na, na - busflag_na);
if (parser->dma)
cpu_addr = of_translate_dma_address(parser->node,
parser->range + na);
@@ -774,7 +779,7 @@ struct of_pci_range *of_pci_range_parser_one(struct of_pci_range_parser *parser,
if (flags != range->flags)
break;
- if (pci_addr != range->pci_addr + range->size ||
+ if (bus_addr != range->bus_addr + range->size ||
cpu_addr != range->cpu_addr + range->size)
break;