- compatible : should be "gpio-leds". 翻译:LED设备树节点的 “compatible ”属性,必须是 "gpio-leds" Each LED is represented as a sub-node of the gpio-leds device. Each node's name represents the name of the corresponding LED. 翻译:每个LED均为gpio-leds的子节点,这些子节点的name就代表了LED...
Cloud Studio代码运行 test-leds{compatible="test,leds";led1-work=<&gpio123GPIO_ACTIVE_LOW>;led2-work=<&gpio124GPIO_ACTIVE_LOW>;status="okay";}; 2) 驱动文件(kernel/drivers/gpio/gpio-testled.c) 代码语言:javascript 代码运行次数:0 复制 Cloud Studio代码运行 #include<linux/errno.h>#include<l...
* (1) amlled-gpios 是使用新版GPIO子系统API的固定写法,必须以 -gpios 结尾 * (2) “&gpio” : 引用的GPIO控制器的名称 * (3) “GPIOZ_X ” :是一个宏定义,可转换成具体的gpio index * (4) 最后的GPIO_ACTIVE_HIGH,代表此PIN脚物理上是高电平有效 */ amlled-gpios = <&gpio GPIOZ_6 GPIO...
AI代码解释 test-leds{compatible="test,leds";led1-work=<&gpio123GPIO_ACTIVE_LOW>;led2-work=<&gpio124GPIO_ACTIVE_LOW>;status="okay";}; 2) 驱动文件(kernel/drivers/gpio/gpio-testled.c) 代码语言:javascript 代码运行次数:0 运行 AI代码解释 #include<linux/errno.h>#include<linux/kernel.h>#in...
label = "GPIO Key sw1";+ linux,code = <KEY_F1>;//键值+ // wakeup-source;+ gpio-key,wakeup;+ };}&pinctrl {+ gpio-keys {+ leds_keys_gpio: leds_keys-gpio {+ rockchip,pins = <4 RK_PA4 RK_FUNC_GPIO &pcfg_pull_up>;//默认上拉+ }; };};键值对应的...
+ gpio-keys { + leds_keys_gpio: leds_keys-gpio { + rockchip,pins = <4 RK_PA4 RK_FUNC_GPIO &pcfg_pull_up>;//默认上拉 + }; }; }; 键值对应的文件位于以下目录,可按需求修改: include/dt-bindings/input/rk-input.h 修改完成后,进入内核目录单独编译内核 ...
int gpio; char *name; }; static struct led_desc[] = { {EXYNOS4212_GPM(0),"led4"}, {EXYNOS4212_GPM(1),"led4"}, {EXYNOS4212_GPM(2),"led4"}, {EXYNOS4212_GPM(3),"led4"}, }; //构造一个结构体用来保存led_classdec与之对应的led灯 ...
ssize_t GPIO_VIB_read(structfile * file,char* buf,size_t count,loff_t * f_ops) {charsdas[5]={1,3,8,1,6}; ssize_t status = 5;unsignedlongmissing; missing = copy_to_user(buf, sdas, status);if(missing == status) status = -EFAULT;elsestatus = status - missing; ...
#define BLUE_LED_PATH "sys/class/leds/blue/brightness" Led驱动对应的dts代码如下: leds:gpio-leds{compatible="gpio-leds";led-green{┊label="green";gpios=<&gpio78GPIO_ACTIVE_HIGH>;inux,default-trigger="timer";default-state="off";};led-blue{┊label="blue";gpios=<&gpio714GPIO_ACTIVE_HIGH...
通过Linux Driver 来实现从应用层到底层的控制,这里主要实现对 LED 灯的 ON/OFF 控制及 GPIO 引脚电平 HIGH/LOW 的上报。 在vendor/nxp-opensource/kernel_imx/drivers/leds 目录下创建 myled.c #include< linux/module.h >#include< linux/kernel.h >#include< linux/fs.h >#include< linux/init.h >#...