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.
Fortunately, the driver is already prepared to handle this by checking
that the regulator pointer is non-NULL before use.
This also avoids triggering a potential deadlock on SC8280XP even if the
underlying issue still remains for the derivative platforms like SA8295P
that actually use the supply.
Fixes: deebc79b28d6 ("clk: qcom: gpucc-sc8280xp: Add external supply for GX gdsc")
Link: https://lore.kernel.org/lkml/Zf25Sv2x9WaCFuIH@xxxxxxxxxxxxxxxxxxxx/
Signed-off-by: Johan Hovold <johan+linaro@xxxxxxxxxx>
---
drivers/clk/qcom/gdsc.c | 11 ++++++++---
1 file changed, 8 insertions(+), 3 deletions(-)
diff --git a/drivers/clk/qcom/gdsc.c b/drivers/clk/qcom/gdsc.c
index e7a4068b9f39..df9618ab7eea 100644
--- a/drivers/clk/qcom/gdsc.c
+++ b/drivers/clk/qcom/gdsc.c
@@ -487,9 +487,14 @@ int gdsc_register(struct gdsc_desc *desc,
if (!scs[i] || !scs[i]->supply)
continue;
- scs[i]->rsupply = devm_regulator_get(dev, scs[i]->supply);
- if (IS_ERR(scs[i]->rsupply))
- return PTR_ERR(scs[i]->rsupply);
+ scs[i]->rsupply = devm_regulator_get_optional(dev, scs[i]->supply);
+ if (IS_ERR(scs[i]->rsupply)) {
+ ret = PTR_ERR(scs[i]->rsupply);
+ if (ret != -ENODEV)
+ return ret;
+
+ scs[i]->rsupply = NULL;
+ }
}
data->num_domains = num;
--
2.43.2
