diff options
Diffstat (limited to 'drivers/mmc/core/core.c')
| -rw-r--r-- | drivers/mmc/core/core.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/drivers/mmc/core/core.c b/drivers/mmc/core/core.c index 9584bffa8b22..d3bfbdfab052 100644 --- a/drivers/mmc/core/core.c +++ b/drivers/mmc/core/core.c @@ -1232,6 +1232,34 @@ EXPORT_SYMBOL(mmc_of_parse_voltage); #endif /* CONFIG_OF */ +static int mmc_of_get_func_num(struct device_node *node) +{ + u32 reg; + int ret; + + ret = of_property_read_u32(node, "reg", ®); + if (ret < 0) + return ret; + + return reg; +} + +struct device_node *mmc_of_find_child_device(struct mmc_host *host, + unsigned func_num) +{ + struct device_node *node; + + if (!host->parent || !host->parent->of_node) + return NULL; + + for_each_child_of_node(host->parent->of_node, node) { + if (mmc_of_get_func_num(node) == func_num) + return node; + } + + return NULL; +} + #ifdef CONFIG_REGULATOR /** |