From mboxrd@z Thu Jan 1 00:00:00 1970 From: Anand Moon Subject: [PATCHv5 5/6] ARM: dts: exynos: update maximum frequency for emmc to 200MHz Date: Thu, 27 Sep 2018 14:07:37 +0000 Message-ID: <20180927140738.1006-6-linux.amoon@gmail.com> References: <20180927140738.1006-1-linux.amoon@gmail.com> Return-path: In-Reply-To: <20180927140738.1006-1-linux.amoon@gmail.com> Sender: linux-kernel-owner@vger.kernel.org To: Rob Herring , Mark Rutland , Kukjin Kim , Krzysztof Kozlowski , Jaehoon Chung , Ulf Hansson , Marek Szyprowski Cc: devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mmc@vger.kernel.org List-Id: devicetree@vger.kernel.org Set the max-frequency to 200MHz for optimal performace of eMMC. Signed-off-by: Anand Moon --- eMMC root@odroid:~# sudo cat /sys/kernel/debug/mmc0/ios clock: 200000000 Hz actual clock: 200000000 Hz vdd: 7 (1.65 - 1.95 V) bus mode: 2 (push-pull) chip select: 0 (don't care) power mode: 2 (on) bus width: 3 (8 bits) timing spec: 10 (mmc HS400) signal voltage: 1 (1.80 V) driver type: 0 (driver type B) --- arch/arm/boot/dts/exynos5422-odroidxu3-common.dtsi | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm/boot/dts/exynos5422-odroidxu3-common.dtsi b/arch/arm/boot/dts/exynos5422-odroidxu3-common.dtsi index e522edb2bb82..1f2d3987dde1 100644 --- a/arch/arm/boot/dts/exynos5422-odroidxu3-common.dtsi +++ b/arch/arm/boot/dts/exynos5422-odroidxu3-common.dtsi @@ -392,6 +392,7 @@ cap-mmc-highspeed; mmc-hs200-1_8v; mmc-hs400-1_8v; + max-frequency = <200000000>; vmmc-supply = <&ldo18_reg>; vqmmc-supply = <&ldo3_reg>; }; -- 2.17.1