diff options
| -rw-r--r-- | drivers/of/address.c | 2 | ||||
| -rw-r--r-- | drivers/of/base.c | 32 | ||||
| -rw-r--r-- | drivers/of/of_private.h | 3 |
3 files changed, 27 insertions, 10 deletions
diff --git a/drivers/of/address.c b/drivers/of/address.c index 3fd34f7ad772..887c0413f648 100644 --- a/drivers/of/address.c +++ b/drivers/of/address.c @@ -14,6 +14,8 @@ #include <linux/slab.h> #include <linux/string.h> +#include "of_private.h" + /* Max address size we deal with */ #define OF_MAX_ADDR_CELLS 4 #define OF_CHECK_ADDR_COUNT(na) ((na) > 0 && (na) <= OF_MAX_ADDR_CELLS) diff --git a/drivers/of/base.c b/drivers/of/base.c index 1d667eb730e1..db7fbc0c0893 100644 --- a/drivers/of/base.c +++ b/drivers/of/base.c @@ -86,34 +86,46 @@ static bool __of_node_is_type(const struct device_node *np, const char *type) return np && match && type && !strcmp(match, type); } -int of_n_addr_cells(struct device_node *np) +int of_bus_n_addr_cells(struct device_node *np) { u32 cells; - do { - if (np->parent) - np = np->parent; + for (; np; np = np->parent) if (!of_property_read_u32(np, "#address-cells", &cells)) return cells; - } while (np->parent); + /* No #address-cells property for the root node */ return OF_ROOT_NODE_ADDR_CELLS_DEFAULT; } + +int of_n_addr_cells(struct device_node *np) +{ + if (np->parent) + np = np->parent; + + return of_bus_n_addr_cells(np); +} EXPORT_SYMBOL(of_n_addr_cells); -int of_n_size_cells(struct device_node *np) +int of_bus_n_size_cells(struct device_node *np) { u32 cells; - do { - if (np->parent) - np = np->parent; + for (; np; np = np->parent) if (!of_property_read_u32(np, "#size-cells", &cells)) return cells; - } while (np->parent); + /* No #size-cells property for the root node */ return OF_ROOT_NODE_SIZE_CELLS_DEFAULT; } + +int of_n_size_cells(struct device_node *np) +{ + if (np->parent) + np = np->parent; + + return of_bus_n_size_cells(np); +} EXPORT_SYMBOL(of_n_size_cells); #ifdef CONFIG_NUMA 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); |