From mboxrd@z Thu Jan 1 00:00:00 1970 From: Marcel Ziswiler Subject: [PATCH 17/26] ARM: tegra: colibri_t30: enable emmc ddr52 mode Date: Mon, 23 Jul 2018 14:36:48 +0200 Message-ID: <20180723123658.980-18-marcel@ziswiler.com> References: <20180723123658.980-1-marcel@ziswiler.com> Return-path: In-Reply-To: <20180723123658.980-1-marcel@ziswiler.com> Sender: linux-kernel-owner@vger.kernel.org To: devicetree@vger.kernel.org, linux-tegra@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Marcel Ziswiler , Thierry Reding , Jonathan Hunter , Rob Herring , Mark Rutland List-Id: linux-tegra@vger.kernel.org From: Marcel Ziswiler Add mmc-ddr-1_8v property enabling eMMC DDR52 mode. root@colibri-t30:~# cat /sys/kernel/debug/mmc1/ios clock: 52000000 Hz actual clock: 52000000 Hz vdd: 21 (3.3 ~ 3.4 V) bus mode: 2 (push-pull) chip select: 0 (don't care) power mode: 2 (on) bus width: 3 (8 bits) timing spec: 8 (mmc DDR52) signal voltage: 1 (1.80 V) driver type: 0 (driver type B) root@colibri-t30:~# hdparm -t /dev/mmcblk1 /dev/mmcblk1: Timing buffered disk reads: 222 MB in 3.00 seconds = 73.92 MB/sec Signed-off-by: Marcel Ziswiler --- arch/arm/boot/dts/tegra30-colibri.dtsi | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm/boot/dts/tegra30-colibri.dtsi b/arch/arm/boot/dts/tegra30-colibri.dtsi index 0a2115f59e41..14ce77ebf4a5 100644 --- a/arch/arm/boot/dts/tegra30-colibri.dtsi +++ b/arch/arm/boot/dts/tegra30-colibri.dtsi @@ -927,6 +927,7 @@ non-removable; vmmc-supply = <®_module_3v3>; /* VCC */ vqmmc-supply = <®_1v8_vio>; /* VCCQ */ + mmc-ddr-1_8v; emmc: emmc@0 { reg = <0>; -- 2.14.4