korg/linux
0
0
Fork 0
mirror of https://mirrors.bfsu.edu.cn/git/linux.git synced 2024-12-28 05:24:47 +08:00
Code Issues Packages Projects Releases Wiki Activity

ARM: dts: sun8i: Add eMMC dt node on Orangepi Plus boards

Browse Source 
The Orangepi Plus has a 16GB eMMC, the vcc, the lack of pull-ups and
the use of the hw-reset pin have all been verified with the board
schematic.

With this dts node for mmc2, the eMMC runs at the following ios settings:
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: 0 (3.30 V)
driver type:    0 (driver type B)

Note the mmcblk1boot0/boot1 partitions are unused as the BROM will load
the SPL from 8k from the start of the main blockdev, just as with a
regular sdcard in mmc0.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
This commit is contained in:
Hans de Goede 2016-03-20 17:00:36 +01:00 committed by Maxime Ripard
parent 4bf89c1dc6
commit 1bfbcfd147
1 changed files with 17 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
arch/arm/boot/dts/sun8i-h3-orangepi-plus.dts
View File

@ -186,6 +186,23 @@
status = "okay";
};
&mmc2 {
pinctrl-names = "default";
pinctrl-0 = <&mmc2_8bit_pins>;
vmmc-supply = <&reg_vcc3v3>;
bus-width = <8>;
non-removable;
cap-mmc-hw-reset;
status = "okay";
};
&mmc2_8bit_pins {
/* Increase drive strength for DDR modes */
allwinner,drive = <SUN4I_PINCTRL_40_MA>;
/* eMMC is missing pull-ups */
allwinner,pull = <SUN4I_PINCTRL_PULL_UP>;
};
&reg_usb1_vbus {
gpio = <&pio 6 13 GPIO_ACTIVE_HIGH>;
status = "okay";