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Subject[PATCH v2 23/34] ARM: tegra: apalis_t30: enable emmc ddr52 mode
Date
From: Marcel Ziswiler <marcel.ziswiler@toradex.com>

Add mmc-ddr-1_8v property enabling eMMC DDR52 mode.

root@apalis-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@apalis-t30:~# hdparm -t /dev/mmcblk1

/dev/mmcblk1:
Timing buffered disk reads: 232 MB in 3.01 seconds = 77.10 MB/sec

Signed-off-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>

---

Changes in v2: None

arch/arm/boot/dts/tegra30-apalis.dtsi | 1 +
1 file changed, 1 insertion(+)

diff --git a/arch/arm/boot/dts/tegra30-apalis.dtsi b/arch/arm/boot/dts/tegra30-apalis.dtsi
index 2e2cdd454fe3..6d6f17422478 100644
--- a/arch/arm/boot/dts/tegra30-apalis.dtsi
+++ b/arch/arm/boot/dts/tegra30-apalis.dtsi
@@ -1094,6 +1094,7 @@
non-removable;
vmmc-supply = <&reg_module_3v3>; /* VCC */
vqmmc-supply = <&reg_1v8_vio>; /* VCCQ */
+ mmc-ddr-1_8v;
};

clocks {
--
2.14.4
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