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使用如下设备树配置，启动到寻找sd卡分区之后就无法启动。
屏蔽pinctrl部分可以启动，能够加载event，但是无法操作，会报错：root@luckfox:/# echo 44 > /sys/class/gpio/export
bash: echo: write error: Device or resource busy
查看gpio信息如下：
root@luckfox:/# cat /sys/kernel/debug/gpio
gpiochip0: GPIOs 0-31, parent: platform/ff940000.gpio, gpio0:
gpio-0 ( |sysfs ) in hi
gpio-10 ( |GPIO_Key_Screenlock ) in lo IRQ ACTIVE LOW
gpio-14 ( |pwr ) out hi ACTIVE LOW
gpio-15 ( |BTN-A ) in lo IRQ ACTIVE LOW
gpio-21 ( |vdd-cpux ) out lo
gpiochip1: GPIOs 32-63, parent: platform/ff870000.gpio, gpio1:
gpio-42 ( |reset ) out hi ACTIVE LOW
gpio-43 ( |KEY-VOLUMEDOWN ) in lo IRQ ACTIVE LOW
gpio-44 ( |KEY-VOLUMEUP ) in lo IRQ ACTIVE LOW
gpio-45 ( |BTN-X ) in lo IRQ ACTIVE LOW
gpio-46 ( |BTN-Y ) in lo IRQ ACTIVE LOW
gpio-47 ( |BTN-B ) in lo IRQ ACTIVE LOW
gpio-51 ( |sysfs ) in lo
gpio-58 ( |work-led ) out lo
gpiochip2: GPIOs 64-95, parent: platform/ff1c0000.gpio, gpio2:
gpio-73 ( |DPAD-UP ) in lo IRQ ACTIVE LOW
gpio-74 ( |DPAD-LEFT ) in lo IRQ ACTIVE LOW
gpio-75 ( |DPAD-RIGHT ) in lo IRQ ACTIVE LOW
gpio-76 ( |DPAD-DOWN ) in lo IRQ ACTIVE LOW
gpio-77 ( |BTN-SELECT ) in lo IRQ ACTIVE LOW
gpio-78 ( |BTN-MODE ) in lo IRQ ACTIVE LOW
gpio-79 ( |BTN-START ) in lo IRQ ACTIVE LOW
gpiochip3: GPIOs 96-127, parent: platform/ff1d0000.gpio, gpio3:
gpio-104 ( |sysfs ) in lo
gpiochip4: GPIOs 128-159, parent: platform/ff1e0000.gpio, gpio4:
root@luckfox:/# piochip0: GPIOs 0-31, parent: platform/ff940000.gpio, gpio0:
o-0 ( |sysfs ) in hi
bash: piochip0:: command not found
gpio-10 ( |GPIO_Key_Sroot@luckfox:/# gpio-0 ( |sysfs ) in hi
bash: syntax error near unexpected token `|'
root@luckfox:/# gpio-10 ( |GPIO_Key_Screenlock ) in lo IRQ ACTIVE LOW
Lbash: syntax error near unexpected token `|'
OW
root@luckfox:/# gpio-14 ( |pwr ) out hi ACTIVE LOW
bash: syntax error near unexpected token `|'
) root@luckfox:/# gpio-15 ( |BTN-A ) in lo IRQ ACTIVE LOW
bash: syntax error near unexpected token `|'
|vdd-cpux root@luckfox:/# gpio-21 ( |vdd-cpux ) out lo
bash: syntax error near unexpected token `|'
贴出有问题的gpio-keys部分：
gpio_power: gpio-power {
status = "okay";
compatible = "gpio-keys";
pinctrl-names = "default";
pinctrl-0 = <&pwrbtn>;
key_screenlock:key-screenlock {
label = "GPIO_Key_Screenlock";
linux,code = <KEY_SCREENLOCK>;
linux,input-type = <1>;
gpios = <&gpio0 RK_PB2 GPIO_ACTIVE_LOW>;
wakeup-source;
debounce-interval = <100>;
};
pwr: pwr {
gpios = <&gpio0 RK_PB6 GPIO_ACTIVE_LOW>;
label = "Core Power Off";
};
};
gpioPad: gpioPad {
status = "okay";
compatible = "gpio-keys";
pinctrl-names = "default";
pinctrl-0 = <&gpio_pad>;
button_a:button-a {
label = "BTN-A";
linux,code = <BTN_SOUTH>;
gpios = <&gpio0 RK_PB7 GPIO_ACTIVE_LOW>;
debounce-interval = <100>;
};
button_b:button-b {
label = "BTN-B";
linux,code = <BTN_EAST>;
gpios = <&gpio1 RK_PB7 GPIO_ACTIVE_LOW>;
debounce-interval = <100>;
};
button_x:button-x {
label = "BTN-X";
linux,code = <BTN_NORTH>;
gpios = <&gpio1 RK_PB5 GPIO_ACTIVE_LOW>;
autorepeat;
debounce-interval = <100>;
};
button_y:button-y {
label = "BTN-Y";
linux,code = <BTN_WEST>;
gpios = <&gpio1 RK_PB6 GPIO_ACTIVE_LOW>;
autorepeat;
debounce-interval = <100>;
};
button_up:button-up {
label = "DPAD-UP";
linux,code = <BTN_DPAD_UP>;
gpios = <&gpio2 RK_PB1 GPIO_ACTIVE_LOW>;
debounce-interval = <100>;
};
button_down:button-down {
label = "DPAD-DOWN";
linux,code = <BTN_DPAD_DOWN>;
gpios = <&gpio2 RK_PB4 GPIO_ACTIVE_LOW>;
debounce-interval = <100>;
};
button_left:button-left {
label = "DPAD-LEFT";
linux,code = <BTN_DPAD_LEFT>;
gpios = <&gpio2 RK_PB2 GPIO_ACTIVE_LOW>;
debounce-interval = <100>;
};
button_right:button-right {
label = "DPAD-RIGHT";
linux,code = <BTN_DPAD_RIGHT>;
gpios = <&gpio2 RK_PB3 GPIO_ACTIVE_LOW>;
debounce-interval = <100>;
};
button_select:button-select {
label = "BTN-SELECT";
linux,code = <BTN_SELECT>;
gpios = <&gpio2 RK_PB5 GPIO_ACTIVE_LOW>;
debounce-interval = <100>;
};
button_start:button-start {
label = "BTN-START";
linux,code = <BTN_START>;
gpios = <&gpio2 RK_PB7 GPIO_ACTIVE_LOW>;
debounce-interval = <100>;
};
button_memu:button-memu {
label = "BTN-MODE";
linux,code = <BTN_MODE>;
gpios = <&gpio2 RK_PB6 GPIO_ACTIVE_LOW>;
debounce-interval = <100>;
};
};
gpioVolume:gpioVolume{
status = "okay";
compatible = "gpio-keys";
autorepeat;
pinctrl-names = "default";
pinctrl-0 = <&gpio_volume>;
button_volumeup:button-volumeup {
label = "KEY-VOLUMEUP";
linux,code = <KEY_VOLUMEUP>;
gpios = <&gpio1 RK_PB4 GPIO_ACTIVE_LOW>;
debounce-interval = <100>;
};
button_volumedown:button-volumedown {
label = "KEY-VOLUMEDOWN";
linux,code = <KEY_VOLUMEDOWN>;
gpios = <&gpio1 RK_PB3 GPIO_ACTIVE_LOW>;
debounce-interval = <100>;
};
};
&gpio0 {
gpio-controller;
//gpio-cells = <2>;
interrupt-controller;
//interrupt-cells = <2>;
};
&gpio1 {
gpio-controller;
//gpio-cells = <2>;
interrupt-controller;
//interrupt-cells = <2>;
};
&gpio2 {
gpio-controller;
//gpio-cells = <2>;
interrupt-controller;
//interrupt-cells = <2>;
};
&pinctrl {
powerBtn {
pwrbtn: pwrbtn {
rockchip,pin =
<0 RK_PB2 RK_FUNC_GPIO &pcfg_pull_up>,
<0 RK_PB6 RK_FUNC_GPIO &pcfg_output_high>;
};
};
gpioPad {
gpio_pad: gpio-pad {
rockchip,pin =
<0 RK_PB7 RK_FUNC_GPIO &pcfg_pull_up>,
<1 RK_PB7 RK_FUNC_GPIO &pcfg_pull_up>,
<1 RK_PB5 RK_FUNC_GPIO &pcfg_pull_up>,
<1 RK_PB6 RK_FUNC_GPIO &pcfg_pull_up>,
<2 RK_PB1 RK_FUNC_GPIO &pcfg_pull_up>,
<2 RK_PB4 RK_FUNC_GPIO &pcfg_pull_up>,
<2 RK_PB2 RK_FUNC_GPIO &pcfg_pull_up>,
<2 RK_PB3 RK_FUNC_GPIO &pcfg_pull_up>,
<2 RK_PB5 RK_FUNC_GPIO &pcfg_pull_up>,
<2 RK_PB7 RK_FUNC_GPIO &pcfg_pull_up>,
<2 RK_PB6 RK_FUNC_GPIO &pcfg_pull_up>;
};
};
gpioVolume{
gpio_volume: gpio-volume {
rockchip,pin =
<1 RK_PB4 RK_FUNC_GPIO &pcfg_pull_up>,
<1 RK_PB3 RK_FUNC_GPIO &pcfg_pull_up>;
};
};
};
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