[PATCH] cpufreq: mediatek-hw: Don't error out if supply is not found
From: Nícolas F. R. A. Prado
Date: Wed Jan 24 2024 - 15:34:48 EST
devm_regulator_get_optional() returns -ENODEV if no supply can be found.
By introducing its usage, commit 788715b5f21c ("cpufreq: mediatek-hw:
Wait for CPU supplies before probing") caused the driver to fail probe
if no supply was present in any of the CPU DT nodes.
Use devm_regulator_get() instead since the CPUs do require supplies
even if not described in the DT. It will gracefully return a dummy
regulator if none is found in the DT node, allowing probe to succeed.
Fixes: 788715b5f21c ("cpufreq: mediatek-hw: Wait for CPU supplies before probing")
Reported-by: kernelci.org bot <bot@xxxxxxxxxxxx>
Closes: https://linux.kernelci.org/test/case/id/65b0b169710edea22852a3fa/
Signed-off-by: Nícolas F. R. A. Prado <nfraprado@xxxxxxxxxxxxx>
---
drivers/cpufreq/mediatek-cpufreq-hw.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/cpufreq/mediatek-cpufreq-hw.c b/drivers/cpufreq/mediatek-cpufreq-hw.c
index a1aa9385980a..8d097dcddda4 100644
--- a/drivers/cpufreq/mediatek-cpufreq-hw.c
+++ b/drivers/cpufreq/mediatek-cpufreq-hw.c
@@ -312,7 +312,7 @@ static int mtk_cpufreq_hw_driver_probe(struct platform_device *pdev)
return dev_err_probe(&pdev->dev, -EPROBE_DEFER,
"Failed to get cpu%d device\n", cpu);
- cpu_reg = devm_regulator_get_optional(cpu_dev, "cpu");
+ cpu_reg = devm_regulator_get(cpu_dev, "cpu");
if (IS_ERR(cpu_reg))
return dev_err_probe(&pdev->dev, PTR_ERR(cpu_reg),
"CPU%d regulator get failed\n", cpu);
---
base-commit: 9ac3ebaef3cc43ecd136911c44f1427286ee5a05
change-id: 20240124-mtk-cpufreq-hw-regulator-enodev-fix-f614019689d0
Best regards,
--
Nícolas F. R. A. Prado <nfraprado@xxxxxxxxxxxxx>