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| author | Rob Herring <robh@kernel.org> | 2023-03-28 23:15:58 +0300 |
|---|---|---|
| committer | Rob Herring <robh@kernel.org> | 2023-04-14 01:46:35 +0300 |
| commit | 3d5089c4263d3594dc055e0f9c5cb990505cdd64 (patch) | |
| tree | 99361f102a9855e01b31001be05216f1f8b5da21 /drivers/of/address.c | |
| parent | c75a79491835c50ca61938ae1ebd3ba5598f7410 (diff) | |
| download | linux-3d5089c4263d3594dc055e0f9c5cb990505cdd64.tar.xz | |
of/address: Add support for 3 address cell bus
There's a few custom bus bindings (e.g. fsl,qoriq-mc) which use a
3 cell format with custom flags in the high cell. We can match these
buses as a fallback if we didn't match on PCI bus which is the only
standard bus binding with 3 address cells.
Link: https://lore.kernel.org/r/20230328-dt-address-helpers-v1-3-e2456c3e77ab@kernel.org
Signed-off-by: Rob Herring <robh@kernel.org>
Diffstat (limited to 'drivers/of/address.c')
| -rw-r--r-- | drivers/of/address.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/of/address.c b/drivers/of/address.c index b79f005834fc..8cfae24148e0 100644 --- a/drivers/of/address.c +++ b/drivers/of/address.c @@ -95,11 +95,17 @@ static int of_bus_default_translate(__be32 *addr, u64 offset, int na) return 0; } +static unsigned int of_bus_default_flags_get_flags(const __be32 *addr) +{ + return of_read_number(addr, 1); +} + static unsigned int of_bus_default_get_flags(const __be32 *addr) { return IORESOURCE_MEM; } + #ifdef CONFIG_PCI static unsigned int of_bus_pci_get_flags(const __be32 *addr) { @@ -344,6 +350,11 @@ static unsigned int of_bus_isa_get_flags(const __be32 *addr) return flags; } +static int of_bus_default_flags_match(struct device_node *np) +{ + return of_bus_n_addr_cells(np) == 3; +} + /* * Array of bus specific translators */ @@ -373,6 +384,17 @@ static struct of_bus of_busses[] = { .has_flags = true, .get_flags = of_bus_isa_get_flags, }, + /* Default with flags cell */ + { + .name = "default-flags", + .addresses = "reg", + .match = of_bus_default_flags_match, + .count_cells = of_bus_default_count_cells, + .map = of_bus_default_map, + .translate = of_bus_default_translate, + .has_flags = true, + .get_flags = of_bus_default_flags_get_flags, + }, /* Default */ { .name = "default", |