Hi Stephen, again
I've seen bindings that have the 'clocks' property at the top level and the appropriate 'clock-names' property to relate the clocks to a subnode.
sound_soc { clocks = <&xxx>, <&xxx>; clock-names = "cpu", "codec"; ... cpu { ... }; codec { ... }; };
Then the subnodes call clk_get() with the top level device and the name of their node and things match up. I suppose this binding is finalized though, so we can't really do that?
I see that the gpio framework has a similar design called devm_get_gpiod_from_child(), so how about we add a devm_get_clk_from_child() API? That would more closely match the intent here, which is to restrict the clk_get() operation to child nodes of the device passed as the first argument.
struct clk *devm_get_clk_from_child(struct device *dev, const char *con_id, struct device_node *child);
Thanks, but, my point is that Linux already have "of_clk_get()", but we don't have its devm_ version. The point is that of_clk_get() can get clock from "device_node". Why having devm_ version become so problem ?
Best regards --- Kuninori Morimoto