[alsa-devel] Question about devm_get_clk_from_child()

Hi Stephen

I noticed that this commit breaks my ALSA Sound playback

4472287a3b2f52f4aa53f294ccb74392dde4e07d ("clk: Introduce of_clk_get_hw_from_clkspec()")

I debuged this issue, and noticed that devm_get_clk_from_child() can't get clk my pseudo DT code is like this

deviceA: devA { ... device = <&devB> };

deviceB: devB { clocks = <xxxx> };

I could get clock on deviceB driver

// dev = deviceB clk = clk_get(dev, NULL);

clk is "clocks = <xxx>"

But, I couldn't get clock from deviceA driver

// node = device = devB node = ...

// dev = deviceA clk = devm_get_clk_from_child(dev, node, NULL);

My understanding is these can get same clock. But, am I wrong ??

Best regards --- Kuninori Morimoto