pwm-regulator can be a bit noisy during boot. One example are the 32-bit Amlogic SoCs when using multi_v7_defconfig (which has CONFIG_REGULATOR_PWM=y and CONFIG_PWM_MESON=m). During boot the pwm-regulator is probed multiple times - the first five tries end with EPROBE_DEFER. This is expected because the pwm-meson driver is only loaded once rootfs is ready (as it's compiled as kernel module).
Other drivers typically suppress an error message for EPROBE_DEFER cases, so let's do the same for the pwm-regulator driver. Example boot log where multiple "pwm-regulator regulator-vcck: Failed to get PWM: -517" messages are logged (Odroid-C1, v5.0-rc3): [0] [0] https://storage.kernelci.org/mainline/master/v5.0-rc3/arm/multi_v7_defconfig/lab-baylibre/boot-meson8b-odroidc1.html Martin Blumenstingl (1): regulator: pwm: suppress EPROBE_DEFER error message drivers/regulator/pwm-regulator.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) -- 2.20.1
