openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

arm64: dts: allwinner: a64: bananapi-m64: Add LED device node 

The Bananapi-M64 has 3 LEDS in red, green, and blue. These are toggled
via GPIO lines, which drive transistors that control current across the
LEDS. The red LED is by default on, via an additional pull-up on the
control line. We consider this means that it is a power indicator.
So we set the "default-on" property for it.

The pingroups the GPIO lines belong to require external regulators be
enabled to be able to drive the GPIO high. These regulators also have
other purposes. However the pin controller does not have bindings for
regulators. Here we just set them to always-on.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
This commit is contained in:
Chen-Yu Tsai 2017-12-02 00:27:33 +08:00 committed by Maxime Ripard
parent 916b68cfe4
commit 36252668c1
1 changed files with 36 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

36
arch/arm64/boot/dts/allwinner/sun50i-a64-bananapi-m64.dts
View File

@ -60,6 +60,26 @@ chosen {
stdout-path = "serial0:115200n8";
};
leds {
compatible = "gpio-leds";
pwr-led {
label = "bananapi-m64:red:pwr";
gpios = <&pio 3 24 GPIO_ACTIVE_HIGH>; /* PD24 */
default-state = "on";
};
green {
label = "bananapi-m64:green:user";
gpios = <&pio 4 14 GPIO_ACTIVE_HIGH>; /* PE14 */
};
blue {
label = "bananapi-m64:blue:user";
gpios = <&pio 4 15 GPIO_ACTIVE_HIGH>; /* PE15 */
};
};
wifi_pwrseq: wifi_pwrseq {
compatible = "mmc-pwrseq-simple";
reset-gpios = <&r_pio 0 2 GPIO_ACTIVE_LOW>; /* PL2 */
@ -152,6 +172,17 @@ axp803: pmic@3a3 {
#include "axp803.dtsi"
&reg_aldo1 {
/*
* This regulator also drives the PE pingroup GPIOs,
* which also controls two LEDs.
*/
regulator-always-on;
regulator-min-microvolt = <2800000>;
regulator-max-microvolt = <2800000>;
regulator-name = "afvcc-csi";
};
&reg_aldo2 {
regulator-always-on;
regulator-min-microvolt = <1800000>;
@ -167,6 +198,11 @@ &reg_aldo3 {
};
&reg_dc1sw {
/*
* This regulator also indirectly drives the PD pingroup GPIOs,
* which also controls the power LED.
*/
regulator-always-on;
regulator-name = "vcc-phy";
};