linux-kernel - [PATCH] ARM: dts: stm32: lxa-mc1: enable DDR50 mode on eMMC

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Message-Id: <20200828130002.1701-1-h.assmann@pengutronix.de>
Date:   Fri, 28 Aug 2020 15:00:02 +0200
From:   Holger Assmann <h.assmann@...gutronix.de>
To:     Rob Herring <robh+dt@...nel.org>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Alexandre Torgue <alexandre.torgue@...com>
Cc:     Ahmad Fatoum <a.fatoum@...gutronix.de>,
        Holger Assmann <h.assmann@...gutronix.de>,
        devicetree@...r.kernel.org,
        linux-stm32@...md-mailman.stormreply.com,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH] ARM: dts: stm32: lxa-mc1: enable DDR50 mode on eMMC

From: Ahmad Fatoum <a.fatoum@...gutronix.de>

The "eMMC high-speed DDR mode (3.3V I/O)" at 50MHz is supported on
the eMMC-interface of the lxa-mc1. Set it in the device tree to
benefit from the speed improvement.

Signed-off-by: Ahmad Fatoum <a.fatoum@...gutronix.de>
Signed-off-by: Holger Assmann <h.assmann@...gutronix.de>
---
 arch/arm/boot/dts/stm32mp157c-lxa-mc1.dts | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm/boot/dts/stm32mp157c-lxa-mc1.dts b/arch/arm/boot/dts/stm32mp157c-lxa-mc1.dts
index b85025d00943..1e5333fd437f 100644
--- a/arch/arm/boot/dts/stm32mp157c-lxa-mc1.dts
+++ b/arch/arm/boot/dts/stm32mp157c-lxa-mc1.dts
@@ -212,6 +212,7 @@
 	pinctrl-1 = <&sdmmc2_b4_od_pins_a &sdmmc2_d47_pins_b>;
 	pinctrl-2 = <&sdmmc2_b4_sleep_pins_a &sdmmc2_d47_sleep_pins_b>;
 	bus-width = <8>;
+	mmc-ddr-3_3v;
 	no-1-8-v;
 	no-sd;
 	no-sdio;
-- 
2.20.1