diff options
| author | Robin Murphy <robin.murphy@arm.com> | 2019-07-02 19:42:39 +0200 |
|---|---|---|
| committer | Rob Herring <robh@kernel.org> | 2019-10-08 20:50:22 +0200 |
| commit | b68ac8dc22ebbf003e26e44bf4dd3030c076df5a (patch) | |
| tree | d26b5be8ad883c6ca06698aa186bd11523df94ae /drivers/of/of_private.h | |
| parent | of: address: Follow DMA parent for "dma-coherent" (diff) | |
| download | linux-b68ac8dc22ebbf003e26e44bf4dd3030c076df5a.tar.xz linux-b68ac8dc22ebbf003e26e44bf4dd3030c076df5a.zip | |
of: Factor out #{addr,size}-cells parsing
In some cases such as PCI host controllers, we may have a "parent bus"
which is an OF leaf node, but still need to correctly parse ranges from
the point of view of that bus. For that, factor out variants of the
"#addr-cells" and "#size-cells" parsers which do not assume they have a
device node and thus immediately traverse upwards before reading the
relevant property.
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
[robh: don't make of_bus_n_{addr,size}_cells() public]
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Tested-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Reviewed-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Signed-off-by: Rob Herring <robh@kernel.org>
Diffstat (limited to 'drivers/of/of_private.h')
| -rw-r--r-- | drivers/of/of_private.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/of/of_private.h b/drivers/of/of_private.h index f8c58615c393..66294d29942a 100644 --- a/drivers/of/of_private.h +++ b/drivers/of/of_private.h @@ -158,6 +158,9 @@ extern void __of_sysfs_remove_bin_file(struct device_node *np, #define for_each_transaction_entry_reverse(_oft, _te) \ list_for_each_entry_reverse(_te, &(_oft)->te_list, node) +extern int of_bus_n_addr_cells(struct device_node *np); +extern int of_bus_n_size_cells(struct device_node *np); + #ifdef CONFIG_OF_ADDRESS extern int of_dma_get_range(struct device_node *np, u64 *dma_addr, u64 *paddr, u64 *size); |