From mboxrd@z Thu Jan 1 00:00:00 1970 From: javier@osg.samsung.com (Javier Martinez Canillas) Date: Thu, 18 Feb 2016 15:19:10 -0300 Subject: [PATCH 2/3] thermal: exynos: Use devm_regulator_get_optional() for vtmu In-Reply-To: <1455819551-4666-1-git-send-email-javier@osg.samsung.com> References: <1455819551-4666-1-git-send-email-javier@osg.samsung.com> Message-ID: <1455819551-4666-3-git-send-email-javier@osg.samsung.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org The Exynos TMU DT binding says that the vtmu-supply is optional but the driver uses devm_regulator_get() that creates a dummy regulator if it's not defined in the DT. For example the following message is in the log: 10060000.tmu supply vtmu not found, using dummy regulator Use the optional version of regulator_get() that doesn't create a dummy regulator and instead returns a -ENODEV errno code. Since it's expected that a regulator may not be defined and the driver will inform about it: exynos-tmu 10060000.tmu: Regulator node (vtmu) not found Signed-off-by: Javier Martinez Canillas --- drivers/thermal/samsung/exynos_tmu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/thermal/samsung/exynos_tmu.c b/drivers/thermal/samsung/exynos_tmu.c index 6c6f59ba7423..f4f36bba7be9 100644 --- a/drivers/thermal/samsung/exynos_tmu.c +++ b/drivers/thermal/samsung/exynos_tmu.c @@ -1310,7 +1310,7 @@ static int exynos_tmu_probe(struct platform_device *pdev) * TODO: Add regulator as an SOC feature, so that regulator enable * is a compulsory call. */ - data->regulator = devm_regulator_get(&pdev->dev, "vtmu"); + data->regulator = devm_regulator_get_optional(&pdev->dev, "vtmu"); if (!IS_ERR(data->regulator)) { ret = regulator_enable(data->regulator); if (ret) { -- 2.5.0