From mboxrd@z Thu Jan 1 00:00:00 1970 From: jh80.chung@samsung.com (Jaehoon Chung) Date: Thu, 24 Mar 2016 18:33:20 +0900 Subject: [PATCH] ARM: dts: exynos: Fix invalid maximum voltage for buck9 supplying SD card In-Reply-To: <1458807125-13580-1-git-send-email-k.kozlowski@samsung.com> References: <1458807125-13580-1-git-send-email-k.kozlowski@samsung.com> Message-ID: <56F3B460.9040306@samsung.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On 03/24/2016 05:12 PM, Krzysztof Kozlowski wrote: > The buck9 regulator of S2MPS11 PMIC had incorrect maximum voltage - > lower by 5 mV than specified by datasheet. This buck9 provides power to > other regulators, including LDO13 and LDO19 which supply the MMC2 (SD > card). > > When constraints were applied, the depending regulators were not > providing enough power, leading to SD card detection errors: > mmc1: card never left busy state > mmc1: error -110 whilst initialising SD card > > Fixes: 86a2d2ac5e5d ("ARM: dts: Add dts file for Odroid XU3 board") > Signed-off-by: Krzysztof Kozlowski Tested-by: Jaehoon Chung Best Regards, Jaehoon Chung > > --- > > The issue can be reproduced on next-20160324 with > bae4fdc88d7f7dda1 (regulator: core: Ensure we are at least in bounds for our constraints). > --- > arch/arm/boot/dts/exynos5422-odroidxu3-common.dtsi | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/arch/arm/boot/dts/exynos5422-odroidxu3-common.dtsi b/arch/arm/boot/dts/exynos5422-odroidxu3-common.dtsi > index 1bd507bfa750..82b2ba632cf6 100644 > --- a/arch/arm/boot/dts/exynos5422-odroidxu3-common.dtsi > +++ b/arch/arm/boot/dts/exynos5422-odroidxu3-common.dtsi > @@ -299,7 +299,7 @@ > buck9_reg: BUCK9 { > regulator-name = "vdd_2.8v_ldo"; > regulator-min-microvolt = <3000000>; > - regulator-max-microvolt = <3750000>; > + regulator-max-microvolt = <3755000>; > regulator-always-on; > regulator-boot-on; > }; >