In device nodes with more than one entry in the reg property, it is sometimes useful to regmap only of the entries. Add an API regmap_init_mem_index() to facilitate this.
Signed-off-by: Faiz Abbas faiz_abbas@ti.com Reviewed-by: Tom Rini trini@konsulko.com --- drivers/core/regmap.c | 42 ++++++++++++++++++++++++++++++++++++++++++ include/regmap.h | 2 ++ 2 files changed, 44 insertions(+)
diff --git a/drivers/core/regmap.c b/drivers/core/regmap.c index 5ef0f71c8b..d1d12eef38 100644 --- a/drivers/core/regmap.c +++ b/drivers/core/regmap.c @@ -108,6 +108,48 @@ static int init_range(ofnode node, struct regmap_range *range, int addr_len, return 0; }
+int regmap_init_mem_index(ofnode node, struct regmap **mapp, int index) +{ + struct regmap *map; + int addr_len, size_len; + int ret; + + addr_len = ofnode_read_simple_addr_cells(ofnode_get_parent(node)); + if (addr_len < 0) { + debug("%s: Error while reading the addr length (ret = %d)\n", + ofnode_get_name(node), addr_len); + return addr_len; + } + + size_len = ofnode_read_simple_size_cells(ofnode_get_parent(node)); + if (size_len < 0) { + debug("%s: Error while reading the size length: (ret = %d)\n", + ofnode_get_name(node), size_len); + return size_len; + } + + map = regmap_alloc(1); + if (!map) + return -ENOMEM; + + ret = init_range(node, map->ranges, addr_len, size_len, index); + if (ret) + return ret; + + if (ofnode_read_bool(node, "little-endian")) + map->endianness = REGMAP_LITTLE_ENDIAN; + else if (ofnode_read_bool(node, "big-endian")) + map->endianness = REGMAP_BIG_ENDIAN; + else if (ofnode_read_bool(node, "native-endian")) + map->endianness = REGMAP_NATIVE_ENDIAN; + else /* Default: native endianness */ + map->endianness = REGMAP_NATIVE_ENDIAN; + + *mapp = map; + + return ret; +} + int regmap_init_mem(ofnode node, struct regmap **mapp) { struct regmap_range *range; diff --git a/include/regmap.h b/include/regmap.h index 3cd7a66cea..0854200a9c 100644 --- a/include/regmap.h +++ b/include/regmap.h @@ -330,6 +330,8 @@ int regmap_init_mem(ofnode node, struct regmap **mapp); int regmap_init_mem_platdata(struct udevice *dev, fdt_val_t *reg, int count, struct regmap **mapp);
+int regmap_init_mem_index(ofnode node, struct regmap **mapp, int index); + /** * regmap_get_range() - Obtain the base memory address of a regmap range *