From: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
To: lgirdwood@gmail.com, broonie@kernel.org
Cc: Martin Blumenstingl <martin.blumenstingl@googlemail.com>,
linux-amlogic@lists.infradead.org, thierry.reding@gmail.com,
linux-kernel@vger.kernel.org, boris.brezillon@free-electrons.com
Subject: [PATCH 1/1] regulator: pwm: suppress EPROBE_DEFER error message
Date: Mon, 21 Jan 2019 19:37:23 +0100 [thread overview]
Message-ID: <20190121183723.25231-2-martin.blumenstingl@googlemail.com> (raw)
In-Reply-To: <20190121183723.25231-1-martin.blumenstingl@googlemail.com>
Suppress the "Failed to get PWM" error output if the actual error code
is EPROBE_DEFER. This makes the behavior of the pwm-regulator driver
consistent with what most other drivers do (which is: print all errors
except EPROBE_DEFER).
An example where this cleans up the kernel log are the 32-bit Amlogic
Meson boards:
multi_v7_defconfig has CONFIG_REGULATOR_PWM=y and CONFIG_PWM_MESON=m.
When booting such a board (for example the Meson8b Odroid-C1) the
following message is printed five times during boot:
pwm-regulator regulator-vcck: Failed to get PWM: -517
On the sixth call the pwm-meson driver is finally loaded (as rootfs
becomes ready) and the "VCCK" pwm-regulator comes up fine.
Fixes: aa66cc6630a408 ("regulator: pwm-regulator: get voltage and duty table from dts")
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
---
drivers/regulator/pwm-regulator.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/regulator/pwm-regulator.c b/drivers/regulator/pwm-regulator.c
index 3f53f9134b32..7789d181ae67 100644
--- a/drivers/regulator/pwm-regulator.c
+++ b/drivers/regulator/pwm-regulator.c
@@ -357,7 +357,9 @@ static int pwm_regulator_probe(struct platform_device *pdev)
drvdata->pwm = devm_pwm_get(&pdev->dev, NULL);
if (IS_ERR(drvdata->pwm)) {
ret = PTR_ERR(drvdata->pwm);
- dev_err(&pdev->dev, "Failed to get PWM: %d\n", ret);
+ if (ret != -EPROBE_DEFER)
+ dev_err(&pdev->dev, "Failed to get PWM: %d\n", ret);
+
return ret;
}
--
2.20.1
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next prev parent reply other threads:[~2019-01-21 18:37 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-01-21 18:37 [PATCH 0/1] pwm-regulator: reduce noise on EPROBE_DEFER Martin Blumenstingl
2019-01-21 18:37 ` Martin Blumenstingl [this message]
2019-01-23 15:27 ` [PATCH 1/1] regulator: pwm: suppress EPROBE_DEFER error message Anand Moon
2019-01-23 16:04 ` Mark Brown
2019-01-23 16:14 ` Ben Dooks
2019-01-23 17:29 ` Mark Brown
2019-01-21 19:18 ` [PATCH 0/1] pwm-regulator: reduce noise on EPROBE_DEFER Mark Brown
2019-01-21 20:55 ` Martin Blumenstingl
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