WhyCan Forum(哇酷开发者社区)
#1 2019-04-26 23:50:07
- 晕哥
- 管理员
- 注册时间： 2017-09-06
- 累计积分： 9,190
V3s/S3 Linux 测试 轮询/中断 GPIO 按钮驱动程序 / 旋转编码器 等
GPIO KEY 按键驱动(轮询)测试:
参考: https://github.com/ARM-software/u-boot/blob/master/arch/arm/dts/sun4i-a10-inet9f-rev03.dts
1. Linux驱动配置 gpio keys poll 驱动:
CONFIG_KEYBOARD_GPIO_POLLED=y
2. arch/arm/boot/dts/sun8i-v3s.dtsi 添加引脚定义:
key_pins: key_pins@0 {
pins = "PB0", "PB1";
function = "gpio_in";
bias-pull-up;
};
3. arch/arm/boot/dts/sun8i-v3s-licheepi-zero.dts 添加:
#include <dt-bindings/input/input.h>
gpio_keys {
compatible = "gpio-keys-polled";
pinctrl-names = "default";
pinctrl-0 = <&key_pins>;
#address-cells = <1>;
#size-cells = <0>;
poll-interval = <20>;
button@0 {
label = "Left Joystick Left";
linux,code = <ABS_X>;
linux,input-type = <EV_ABS>;
linux,input-value = <0xffffffff>; /* -1 */
gpios = <&pio 1 0 GPIO_ACTIVE_LOW>; /* PB0 */
};
button@1 {
label = "Left Joystick Right";
linux,code = <ABS_Z>;
linux,input-type = <EV_ABS>;
linux,input-value = <1>;
gpios = <&pio 1 1 GPIO_ACTIVE_LOW>; /* PB1 */
};
};4. 编译烧录运行测试:
# evtest /dev/input/event0
Input driver version is 1.0.1
Input device ID: bus 0x19 vendor 0x1 product 0x1 version 0x100
Input device name: "gpio_keys"
Supported events:
Event type 0 (EV_SYN)
Event type 1 (EV_KEY)
Event type 3 (EV_ABS)
Event code 0 (ABS_X)
Value 0
Min -1
Max 0
Event code 2 (ABS_Z)
Value 0
Min 0
Max 1
Properties:
Testing ... (interrupt to exit)
Event: time 80.855039, type 3 (EV_ABS), code 2 (ABS_Z), value 1
Event: time 80.855039, -------------- SYN_REPORT ------------
Event: time 80.915049, type 3 (EV_ABS), code 2 (ABS_Z), value 0
Event: time 80.915049, -------------- SYN_REPORT ------------
Event: time 84.545066, type 3 (EV_ABS), code 2 (ABS_Z), value 1
Event: time 84.545066, -------------- SYN_REPORT ------------
Event: time 84.605043, type 3 (EV_ABS), code 2 (ABS_Z), value 0
Event: time 84.605043, -------------- SYN_REPORT ------------
Event: time 90.845038, type 3 (EV_ABS), code 2 (ABS_Z), value 1
Event: time 90.845038, -------------- SYN_REPORT ------------
Event: time 90.995036, type 3 (EV_ABS), code 2 (ABS_Z), value 0
Event: time 90.995036, -------------- SYN_REPORT ------------
Event: time 91.145036, type 3 (EV_ABS), code 2 (ABS_Z), value 1
Event: time 91.145036, -------------- SYN_REPORT ------------
Event: time 91.355035, type 3 (EV_ABS), code 2 (ABS_Z), value 0
Event: time 91.355035, -------------- SYN_REPORT ------------
Event: time 91.445037, type 3 (EV_ABS), code 2 (ABS_Z), value 1
Event: time 91.445037, -------------- SYN_REPORT ------------
Event: time 91.625037, type 3 (EV_ABS), code 2 (ABS_Z), value 0
Event: time 91.625037, -------------- SYN_REPORT ------------
Event: time 101.375037, type 3 (EV_ABS), code 0 (ABS_X), value -1
Event: time 101.375037, -------------- SYN_REPORT ------------
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#2 2019-04-27 09:23:07
- 晕哥
- 管理员
- 注册时间： 2017-09-06
- 累计积分： 9,190
Re: V3s/S3 Linux 测试 轮询/中断 GPIO 按钮驱动程序 / 旋转编码器 等
--------------------------------------------------------------------------------
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#3 2019-04-27 09:28:27
- 晕哥
- 管理员
- 注册时间： 2017-09-06
- 累计积分： 9,190
Re: V3s/S3 Linux 测试 轮询/中断 GPIO 按钮驱动程序 / 旋转编码器 等
GPIO KEY 按键驱动(中断)测试:
参考: https://gitlab.labs.nic.cz/turris/u-boot-turris/commit/643ad899f545fd101aa7a67771e74d582a1829b2
1. Linux驱动配置 gpio keys 驱动:
CONFIG_KEYBOARD_GPIO=y
2. arch/arm/boot/dts/sun8i-v3s.dtsi 添加引脚定义:
key_pins: key_pins@0 {
pins = "PB0", "PB1";
function = "gpio_in";
allwinner,drive = <0>;
allwinner,pull = <1>;
};
3. arch/arm/boot/dts/sun8i-v3s-licheepi-zero.dts 添加:
#include <dt-bindings/input/input.h>
gpio_keys {
compatible = "gpio-keys";
pinctrl-names = "default";
pinctrl-0 = <&key_pins>;
#address-cells = <1>;
#size-cells = <0>;
autorepeat;
button@0 {
label = "Key back";
linux,code = <KEY_BACK>;
gpios = <&pio 1 0 GPIO_ACTIVE_LOW>; /* PB0 */
};
button@1 {
label = "Key home";
linux,code = <KEY_HOME>;
gpios = <&pio 1 1 GPIO_ACTIVE_LOW>; /* PB1 */
};
};4. 编译烧录运行测试, 支持长按:
# evtest /dev/input/event2
Input driver version is 1.0.1
Input device ID: bus 0x19 vendor 0x1 product 0x1 version 0x100
Input device name: "gpio_keys"
Supported events:
Event type 0 (EV_SYN)
Event type 1 (EV_KEY)
Event code 102 (KEY_HOME)
Event code 158 (KEY_BACK)
Key repeat handling:
Repeat type 20 (EV_REP)
Repeat code 0 (REP_DELAY)
Value 250
Repeat code 1 (REP_PERIOD)
Value 33
Properties:
Testing ... (interrupt to exit)
Event: time 3606.960158, type 1 (EV_KEY), code 102 (KEY_HOME), value 1
Event: time 3606.960158, -------------- SYN_REPORT ------------
Event: time 3607.220140, type 1 (EV_KEY), code 102 (KEY_HOME), value 2
Event: time 3607.220140, -------------- SYN_REPORT ------------
Event: time 3607.270142, type 1 (EV_KEY), code 102 (KEY_HOME), value 2
Event: time 3607.270142, -------------- SYN_REPORT ------------
Event: time 3607.320136, type 1 (EV_KEY), code 102 (KEY_HOME), value 2
Event: time 3607.320136, -------------- SYN_REPORT ------------
Event: time 3607.370136, type 1 (EV_KEY), code 102 (KEY_HOME), value 2
Event: time 3607.370136, -------------- SYN_REPORT ------------
Event: time 3607.370277, type 1 (EV_KEY), code 102 (KEY_HOME), value 0
Event: time 3607.370277, -------------- SYN_REPORT ------------
Event: time 3616.220150, type 1 (EV_KEY), code 158 (KEY_BACK), value 1
Event: time 3616.220150, -------------- SYN_REPORT ------------
Event: time 3616.480130, type 1 (EV_KEY), code 158 (KEY_BACK), value 2
Event: time 3616.480130, -------------- SYN_REPORT ------------
Event: time 3616.530130, type 1 (EV_KEY), code 158 (KEY_BACK), value 2
Event: time 3616.530130, -------------- SYN_REPORT ------------
Event: time 3616.580139, type 1 (EV_KEY), code 158 (KEY_BACK), value 2
Event: time 3616.580139, -------------- SYN_REPORT ------------
Event: time 3616.630136, type 1 (EV_KEY), code 158 (KEY_BACK), value 2
Event: time 3616.630136, -------------- SYN_REPORT ------------
Event: time 3616.680132, type 1 (EV_KEY), code 158 (KEY_BACK), value 2
Event: time 3616.680132, -------------- SYN_REPORT ------------
Event: time 3616.730131, type 1 (EV_KEY), code 158 (KEY_BACK), value 2
Event: time 3616.730131, -------------- SYN_REPORT ------------
Event: time 3616.780134, type 1 (EV_KEY), code 158 (KEY_BACK), value 2
Event: time 3616.780134, -------------- SYN_REPORT ------------
Event: time 3616.830131, type 1 (EV_KEY), code 158 (KEY_BACK), value 2
Event: time 3616.830131, -------------- SYN_REPORT ------------
Event: time 3616.850155, type 1 (EV_KEY), code 158 (KEY_BACK), value 0
Event: time 3616.850155, -------------- SYN_REPORT ------------
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#4 2019-04-27 09:55:11
- 晕哥
- 管理员
- 注册时间： 2017-09-06
- 累计积分： 9,190
Re: V3s/S3 Linux 测试 轮询/中断 GPIO 按钮驱动程序 / 旋转编码器 等
参考: https://www.kernel.org/doc/Documentation/devicetree/bindings/input/gpio-keys.txt
接上帖， GPIO 也可以换作 interrupts, Linux 官方文档提示 二选一
gpio_keys {
compatible = "gpio-keys";
pinctrl-names = "default";
pinctrl-0 = <&key_pins>;
#address-cells = <1>;
#size-cells = <0>;
autorepeat;
button@0 {
label = "Key back";
linux,code = <KEY_BACK>;
interrupt-parent = <&pio>;
interrupts = <1 0 IRQ_TYPE_EDGE_FALLING>;//PB0
};button@1 {
label = "Key home";
linux,code = <KEY_HOME>;
interrupt-parent = <&pio>;
interrupts = <1 1 IRQ_TYPE_EDGE_FALLING>; //PB1
};};
查看中断:
# cat /proc/interrupts
CPU0
17: 0 GIC-0 29 Level arch_timer
18: 3375 GIC-0 30 Level arch_timer
21: 0 GIC-0 50 Level /soc/timer@01c20c00
22: 0 GIC-0 82 Level 1c02000.dma-controller
23: 9025 GIC-0 92 Level sunxi-mmc
24: 479 GIC-0 93 Level sunxi-mmc
25: 21 GIC-0 103 Level musb-hdrc.1.auto
26: 0 GIC-0 104 Level ehci_hcd:usb1
27: 0 GIC-0 105 Level ohci_hcd:usb2
28: 0 GIC-0 72 Level 1c20400.rtc
34: 0 GIC-0 62 Level sun4i-a10-lradc-keys
36: 226 GIC-0 32 Level ttyS0
37: 0 GIC-0 38 Level mv64xxx_i2c
39: 1 sunxi_pio_edge 0 Edge Key back
40: 68 sunxi_pio_edge 1 Edge Key home
IPI0: 0 CPU wakeup interrupts
IPI1: 0 Timer broadcast interrupts
IPI2: 0 Rescheduling interrupts
IPI3: 0 Function call interrupts
IPI4: 0 CPU stop interrupts
IPI5: 0 IRQ work interrupts
IPI6: 0 completion interrupts
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#5 2019-04-27 14:07:17
- 晕哥
- 管理员
- 注册时间： 2017-09-06
- 累计积分： 9,190
Re: V3s/S3 Linux 测试 轮询/中断 GPIO 按钮驱动程序 / 旋转编码器 等
旋转编码器(中断)测试:
参考: https://github.com/teknoid/dac/blob/master/misc/gpio-rotary.dts
接线方法:
PB0 - CLK
PB1 - DT
3V3
GND
1. Linux驱动配置 gpio keys 驱动:
CONFIG_INPUT_GPIO_ROTARY_ENCODER=y
2. arch/arm/boot/dts/sun8i-v3s.dtsi 添加引脚定义:
key_pins: key_pins@0 {
pins = "PB0", "PB1";
function = "gpio_in";
allwinner,drive = <0>;
allwinner,pull = <1>;
};
3. arch/arm/boot/dts/sun8i-v3s-licheepi-zero.dts 添加:
#include <dt-bindings/input/input.h>
rotary@0 {
compatible = "rotary-encoder";
pinctrl-names = "default";
pinctrl-0 = <&key_pins>;
gpios = <&pio 1 0 GPIO_ACTIVE_LOW>, <&pio 1 1 GPIO_ACTIVE_LOW>; /* PB0, PB1 */
linux,axis = <0>; /* REL_X */
rotary-encoder,encoding = "gray";
rotary-encoder,relative-axis;
};4. 编译烧录运行测试, 支持长按:
# evtest /dev/input/event1
Input driver version is 1.0.1
Input device ID: bus 0x19 vendor 0x0 product 0x0 version 0x0
Input device name: "rotary@0"
Supported events:
Event type 0 (EV_SYN)
Event type 2 (EV_REL)
Event code 0 (REL_X)
Properties:
Testing ... (interrupt to exit)
Event: time 2474.959560, type 2 (EV_REL), code 0 (REL_X), value 1
Event: time 2474.959560, -------------- SYN_REPORT ------------
Event: time 2476.204760, type 2 (EV_REL), code 0 (REL_X), value 1
Event: time 2476.204760, -------------- SYN_REPORT ------------
Event: time 2476.907228, type 2 (EV_REL), code 0 (REL_X), value 1
Event: time 2476.907228, -------------- SYN_REPORT ------------
Event: time 2477.565278, type 2 (EV_REL), code 0 (REL_X), value 1
Event: time 2477.565278, -------------- SYN_REPORT ------------
Event: time 2478.140605, type 2 (EV_REL), code 0 (REL_X), value 1
Event: time 2478.140605, -------------- SYN_REPORT ------------
Event: time 2478.548095, type 2 (EV_REL), code 0 (REL_X), value -1
Event: time 2478.548095, -------------- SYN_REPORT ------------
Event: time 2479.051748, type 2 (EV_REL), code 0 (REL_X), value -1
Event: time 2479.051748, -------------- SYN_REPORT ------------
Event: time 2479.541767, type 2 (EV_REL), code 0 (REL_X), value -1
Event: time 2479.541767, -------------- SYN_REPORT ------------
Event: time 2479.924168, type 2 (EV_REL), code 0 (REL_X), value -1
Event: time 2479.924168, -------------- SYN_REPORT ------------
Event: time 2480.279108, type 2 (EV_REL), code 0 (REL_X), value -1
Event: time 2480.279108, -------------- SYN_REPORT ------------
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#6 2019-04-27 19:57:18
- 晕哥
- 管理员
- 注册时间： 2017-09-06
- 累计积分： 9,190
Re: V3s/S3 Linux 测试 轮询/中断 GPIO 按钮驱动程序 / 旋转编码器 等
荔枝派zero 旋转编码器演示视频
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#7 2020-01-29 15:58:55
- smartcar
- 会员
- 注册时间： 2018-02-19
- 累计积分： 683
Re: V3s/S3 Linux 测试 轮询/中断 GPIO 按钮驱动程序 / 旋转编码器 等
牛叉，学习了。
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#8 2020-04-06 10:11:11
- ubuntu
- 会员
- 注册时间： 2020-03-30
- 累计积分： 60
Re: V3s/S3 Linux 测试 轮询/中断 GPIO 按钮驱动程序 / 旋转编码器 等
牛叉，学习了, 正需要这个demo到A33测试, 晚点过来报告。
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#9 2020-04-06 16:34:58
- ubuntu
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- 注册时间： 2020-03-30
- 累计积分： 60
Re: V3s/S3 Linux 测试 轮询/中断 GPIO 按钮驱动程序 / 旋转编码器 等
我的A33 linux5.x 按 4# 的操作步奏，中断申请到了, 但是根本不触发。
arch/arm/boot/dts/sun8i-a23-a33.dtsi
pio: pinctrl@1c20800 {
/* compatible gets set in SoC specific dtsi file */
reg = <0x01c20800 0x400>;
....
key_pins: key_pins@0 {
pins = "PB5";
function = "gpio_in";
allwinner,drive = <0>;
allwinner,pull = <1>;
};arch/arm/boot/dts/sun8i-a33.dtsi
keys{
compatible = "gpio-keys";
pinctrl-names = "default";
pinctrl-0 = <&key_pins>;
#address-cells = <1>;
#size-cells = <0>;
autorepeat;
g-keys_up {
label = "GPIO KEY_UP";
linux,code = <103>; /* KEY_UP, see /usr/include/linux/input-event-codes.h */
// gpios = <&pio 1 5 1>; /* PA7 GPIO_ACTIVE_LOW */
interrupt-parent = <&pio>;
interrupts = <1 5 IRQ_TYPE_EDGE_FALLING>;//PB0
};
/*status = "okay";*/
};
iio-hwmon {
compatible = "iio-hwmon";
io-channels = <&ths>;
};根本不触发:
# cat /proc/interrupts
CPU0 CPU1 CPU2 CPU3
18: 0 0 0 0 GICv2 29 Level arch_timer
19: 401 1735 205 225 GICv2 30 Level arch_timer
22: 0 0 0 0 GICv2 50 Level timer@1c20c00
23: 0 0 0 0 GICv2 82 Level 1c02000.dma-controller
25: 4072 0 0 0 GICv2 92 Level sunxi-mmc
26: 0 0 0 0 GICv2 103 Level musb-hdrc.1.auto
27: 0 0 0 0 GICv2 104 Level ehci_hcd:usb1
28: 0 0 0 0 GICv2 105 Level ohci_hcd:usb2
34: 1705 0 0 0 GICv2 32 Level ttyS0
56: 0 0 0 0 sunxi_pio_edge 5 Edge GPIO KEY_UP
60: 0 0 0 0 sunxi_pio_edge 9 Edge 1c0f000.mmc cd
IPI0: 0 0 0 0 CPU wakeup interrupts
IPI1: 0 0 0 0 Timer broadcast interrupts
IPI2: 749 723 125 1223 Rescheduling interrupts
IPI3: 1 12 22 43 Function call interrupts
IPI4: 0 0 0 0 CPU stop interrupts
IPI5: 0 0 0 0 IRQ work interrupts
IPI6: 0 0 0 0 completion interrupts
Err: 0离线
#10 2020-04-06 16:43:34
- ubuntu
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- 注册时间： 2020-03-30
- 累计积分： 60
Re: V3s/S3 Linux 测试 轮询/中断 GPIO 按钮驱动程序 / 旋转编码器 等
https://github.com/torvalds/linux/blob/master/drivers/pinctrl/sunxi/pinctrl-sun8i-a33.c
https://patchwork.kernel.org/patch/8572141/
diff --git a/drivers/pinctrl/sunxi/pinctrl-sun8i-a33.c b/drivers/pinctrl/sunxi/pinctrl-sun8i-a33.c
index 00265f0..8b381d6 100644
--- a/drivers/pinctrl/sunxi/pinctrl-sun8i-a33.c
+++ b/drivers/pinctrl/sunxi/pinctrl-sun8i-a33.c
@@ -485,6 +485,7 @@ static const struct sunxi_pinctrl_desc sun8i_a33_pinctrl_data = {
.pins = sun8i_a33_pins,
.npins = ARRAY_SIZE(sun8i_a33_pins),
.irq_banks = 2,
+ .irq_bank_base = 1,
};2016 的bug patch 也没有并入？
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#11 2020-04-06 16:49:42
- ubuntu
- 会员
- 注册时间： 2020-03-30
- 累计积分： 60
Re: V3s/S3 Linux 测试 轮询/中断 GPIO 按钮驱动程序 / 旋转编码器 等
https://lore.kernel.org/patchwork/patch/934382/
这里貌似有icenowy 关于 A33/V3s 外部IO中断的 patch
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#12 2020-04-06 20:03:27
- qiushan
- 会员
- 注册时间： 2020-01-16
- 累计积分： 26
Re: V3s/S3 Linux 测试 轮询/中断 GPIO 按钮驱动程序 / 旋转编码器 等
mark
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#13 2020-05-26 14:09:03
- CAT.1
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- 注册时间： 2020-05-22
- 累计积分： 18
Re: V3s/S3 Linux 测试 轮询/中断 GPIO 按钮驱动程序 / 旋转编码器 等
我的设备树:
gpio_keys {
compatible = "gpio-keys-polled";
pinctrl-names = "default";
/* pinctrl-0 = <&key_pins>;*/
#address-cells = <1>;
#size-cells = <0>;
poll-interval = <20>;
button@0 {
label = "GPIO Key Up";
linux,code = <KEY_UP>;
gpios = <&pio 7 1 GPIO_ACTIVE_LOW>; /* PH1 */
};
button@1 {
label = "GPIO Key Enter";
linux,code = <KEY_ENTER>;
gpios = <&pio 7 8 GPIO_ACTIVE_LOW>; /* PH8 */
};
button@2 {
label = "GPIO Key Down";
linux = <KEY_DOWN>;
gpios = <&pio 7 7 GPIO_ACTIVE_LOW>; /* PH7 */
};
};安装驱动, 并不能生成 event 设备:
# modprobe gpio_keys_polled
[ 567.156253] gpio-keys-polled gpio_keys: button without keycode
[ 567.162193] gpio-keys-polled: probe of gpio_keys failed with error -22
老铁们帮我瞅瞅。
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#14 2020-05-26 15:54:40
- CAT.1
- 会员
- 注册时间： 2020-05-22
- 累计积分： 18
Re: V3s/S3 Linux 测试 轮询/中断 GPIO 按钮驱动程序 / 旋转编码器 等
晕， 搞错了
linux = <KEY_DOWN>;
应该是
linux,code = <KEY_DOWN>;
现在可以了。 奇怪了， 居然还能通过编译。
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#15 2020-09-05 10:31:06
- 夜空中最亮的灯
- 会员
- 注册时间： 2020-05-14
- 累计积分： 11
Re: V3s/S3 Linux 测试 轮询/中断 GPIO 按钮驱动程序 / 旋转编码器 等
晕哥，我的v3s和你的中断代码一模一样，cat/proc/interrupt也一样，就是我的是event1，但是信息和你的event2一样，但是死活进不了中断。试了下你的那个轮训key可以触发，io口都一样的。请问有什么解决办法可以尝试吗？会不会是内核原因？
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#16 2020-09-05 10:42:49
- 哇酷小二
- 管理员
- 注册时间： 2020-04-22
- 累计积分： 1,807
Re: V3s/S3 Linux 测试 轮询/中断 GPIO 按钮驱动程序 / 旋转编码器 等
晕哥，我的v3s和你的中断代码一模一样，cat/proc/interrupt也一样，就是我的是event1，但是信息和你的event2一样，但是死活进不了中断。试了下你的那个轮训key可以触发，io口都一样的。请问有什么解决办法可以尝试吗？会不会是内核原因？
写一个简单的V3s@linux4.13-y 中断驱动
http://whycan.cn/t_1261.html
(出处:哇酷开发者社区【全志 V3S/F1C100s/X3】)
先用这个简单的驱动程序测试一下中断.
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#17 2020-09-08 16:52:49
- 1501257472
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- 注册时间： 2020-09-08
- 累计积分： 2
Re: V3s/S3 Linux 测试 轮询/中断 GPIO 按钮驱动程序 / 旋转编码器 等
您好，V3s linux的系统如何裁剪出来的？V3s 不是自带的camdroid系统么，我用的我在lichee下build.sh pack编译出来的sun8iw8p1_linux_tiger-cdr_uart0.img镜像使用PhoenixUSBPRO无法烧写，但是编译成camdroid就可以烧写，介质时nand，能告诉如何编译linux可烧写的系统镜像么
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#18 2020-09-09 21:33:08
- 逸俊晨晖
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Re: V3s/S3 Linux 测试 轮询/中断 GPIO 按钮驱动程序 / 旋转编码器 等
我在用f1c100s的测按键轮询 在对应的设备树文件添加内容
key_pins: key_pins@0 {
pins = "PE4";
function = "gpio_in";
bias-pull-up;
};
gpio_keys {
compatible = "gpio-keys-polled";
pinctrl-names = "default";
pinctrl-0 = <&key_pins>;
#address-cells = <1>;
#size-cells = <0>;
poll-interval = <20>;
button@0 {
label = "Left Joystick Right";
linux,code = <ABS_Z>;
linux,input-type = <EV_ABS>;
linux,input-value = <1>;
gpios = <&pio 4 4 GPIO_ACTIVE_LOW>; /* PE4 */
};
};然后编译打包烧录 开机提示io被占用 没有相应的/dev/evenX
[ 0.944905] suniv-f1c100s-pinctrl 1c20800.pinctrl: pin PE4 already requested by gpio_keys; cannot claim for 1c20800.pinctrl:132
[ 0.956462] suniv-f1c100s-pinctrl 1c20800.pinctrl: pin-132 (1c20800.pinctrl:132) status -22
[ 0.964843] gpio-keys-polled gpio_keys: failed to get gpio: -22
[ 0.970843] gpio-keys-polled: probe of gpio_keys failed with error -22
[ 0.978318] input: 1c23400.lradc as /devices/platform/soc/1c23400.lradc/input/input1 我查了设备树 发现根本没占用 换了几个IO都是这样
然后我把这句屏蔽掉了 pinctrl-0 = <&key_pins>;
发现就可以了 有相应的/dev/evenX 测试也有效 只是没有pinctrl-0 = <&key_pins>;里的上拉作用
不知道为什么会这样
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