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[82.243.161.21]) by smtp.googlemail.com with ESMTPSA id r2sm5381219edm.82.2018.03.02.05.44.39 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Fri, 02 Mar 2018 05:44:40 -0800 (PST) From: Jerome Brunet To: Kevin Hilman , Carlo Caione Subject: [PATCH] ARM64: dts: meson: reduce odroid-c2 eMMC maximum rate Date: Fri, 2 Mar 2018 14:44:36 +0100 Message-Id: <20180302134436.18844-1-jbrunet@baylibre.com> X-Mailer: git-send-email 2.14.3 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20180302_054453_734394_F5ED9F27 X-CRM114-Status: GOOD ( 10.93 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, ellierevves@gmail.com, linux-kernel@vger.kernel.org, linux-amlogic@lists.infradead.org, linux-arm-kernel@lists.infradead.org, Jerome Brunet MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP Different modules maybe installed by the user on the eMMC connector of the odroid-c2. While the red modules are working without an issue, it seems some black modules (apparently Samsung based) are having issue at 200MHz While the tuning algorithm introduced in v4.14 enables high speed modes on every other tested designs, it seems a problem remains for this particular combination of board and eMMC module. Lowering the maximum frequency of the eMMC on this board until we can figure out a better solution. Fixes: d341ca88eead ("mmc: meson-gx: rework tuning function") Suggested-by: Ellie Reeves Signed-off-by: Jerome Brunet --- arch/arm64/boot/dts/amlogic/meson-gxbb-odroidc2.dts | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm64/boot/dts/amlogic/meson-gxbb-odroidc2.dts b/arch/arm64/boot/dts/amlogic/meson-gxbb-odroidc2.dts index 73a030a5ecf3..43475139576c 100644 --- a/arch/arm64/boot/dts/amlogic/meson-gxbb-odroidc2.dts +++ b/arch/arm64/boot/dts/amlogic/meson-gxbb-odroidc2.dts @@ -311,7 +311,7 @@ pinctrl-names = "default", "clk-gate"; bus-width = <8>; - max-frequency = <200000000>; + max-frequency = <100000000>; non-removable; disable-wp; cap-mmc-highspeed;