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[2003:dc:d73a:8100:428d:5cff:feb9:9db8]) by smtp.googlemail.com with ESMTPSA id 199sm55700630wmh.21.2019.01.21.10.37.33 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 21 Jan 2019 10:37:33 -0800 (PST) From: Martin Blumenstingl To: lgirdwood@gmail.com, broonie@kernel.org Subject: [PATCH 0/1] pwm-regulator: reduce noise on EPROBE_DEFER Date: Mon, 21 Jan 2019 19:37:22 +0100 Message-Id: <20190121183723.25231-1-martin.blumenstingl@googlemail.com> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190121_103736_545725_B433A290 X-CRM114-Status: UNSURE ( 9.64 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-amlogic@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Martin Blumenstingl , linux-amlogic@lists.infradead.org, thierry.reding@gmail.com, linux-kernel@vger.kernel.org, boris.brezillon@free-electrons.com Sender: "linux-amlogic" Errors-To: linux-amlogic-bounces+patchwork-linux-amlogic=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP 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(-)