On 25.03.2024 3:10 PM, Dmitry Baryshkov wrote: > On Mon, 25 Mar 2024 at 16:01, Mark Brown <broonie@xxxxxxxxxx> wrote: >> >> On Mon, Mar 25, 2024 at 09:19:57AM +0100, Johan Hovold wrote: >>> Since commit deebc79b28d6 ("clk: qcom: gpucc-sc8280xp: Add external >>> supply for GX gdsc") the GDSC supply must be treated as optional to >>> avoid warnings like: >>> >>> gpu_cc-sc8280xp 3d90000.clock-controller: supply vdd-gfx not found, using dummy regulator >>> >>> on SC8280XP. >> >> Can this device actually run with the supply physically disconnected? > > On SC8280XP this is supplied via power-domain instead of the supply. I think Dmitry is asking about this bit: if (ret != -ENODEV) return ret; which is basically repeating the difference that _optional makes Konrad