diff options
Diffstat (limited to 'drivers/clk/clk.c')
| -rw-r--r-- | drivers/clk/clk.c | 46 |
1 files changed, 41 insertions, 5 deletions
diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c index d46e8b9b9c9f..04288063847b 100644 --- a/drivers/clk/clk.c +++ b/drivers/clk/clk.c @@ -4065,6 +4065,42 @@ void devm_of_clk_del_provider(struct device *dev) } EXPORT_SYMBOL(devm_of_clk_del_provider); +int of_parse_clkspec(const struct device_node *np, int index, const char *name, + struct of_phandle_args *out_args) +{ + int ret = -ENOENT; + + /* Walk up the tree of devices looking for a clock property that matches */ + while (np) { + /* + * For named clocks, first look up the name in the + * "clock-names" property. If it cannot be found, then index + * will be an error code and of_parse_phandle_with_args() will + * return -EINVAL. + */ + if (name) + index = of_property_match_string(np, "clock-names", name); + ret = of_parse_phandle_with_args(np, "clocks", "#clock-cells", + index, out_args); + if (!ret) + break; + if (name && index >= 0) + break; + + /* + * No matching clock found on this node. If the parent node + * has a "clock-ranges" property, then we can try one of its + * clocks. + */ + np = np->parent; + if (np && !of_get_property(np, "clock-ranges", NULL)) + break; + index = 0; + } + + return ret; +} + static struct clk_hw * __of_clk_get_hw_from_provider(struct of_clk_provider *provider, struct of_phandle_args *clkspec) @@ -4080,8 +4116,7 @@ __of_clk_get_hw_from_provider(struct of_clk_provider *provider, return __clk_get_hw(clk); } -struct clk *__of_clk_get_from_provider(struct of_phandle_args *clkspec, - const char *dev_id, const char *con_id) +struct clk_hw *of_clk_get_hw_from_clkspec(struct of_phandle_args *clkspec) { struct of_clk_provider *provider; struct clk_hw *hw = ERR_PTR(-EPROBE_DEFER); @@ -4089,7 +4124,6 @@ struct clk *__of_clk_get_from_provider(struct of_phandle_args *clkspec, if (!clkspec) return ERR_PTR(-EINVAL); - /* Check if we have such a provider in our array */ mutex_lock(&of_clk_mutex); list_for_each_entry(provider, &of_clk_providers, link) { if (provider->node == clkspec->np) { @@ -4100,7 +4134,7 @@ struct clk *__of_clk_get_from_provider(struct of_phandle_args *clkspec, } mutex_unlock(&of_clk_mutex); - return clk_hw_create_clk(hw, dev_id, con_id); + return hw; } /** @@ -4113,7 +4147,9 @@ struct clk *__of_clk_get_from_provider(struct of_phandle_args *clkspec, */ struct clk *of_clk_get_from_provider(struct of_phandle_args *clkspec) { - return __of_clk_get_from_provider(clkspec, NULL, __func__); + struct clk_hw *hw = of_clk_get_hw_from_clkspec(clkspec); + + return clk_hw_create_clk(hw, NULL, __func__); } EXPORT_SYMBOL_GPL(of_clk_get_from_provider); |