} Gadget Device 准备好了 Endpoint 资源链表以后,通过 usb_add_gadget_udc() 注册。这样就可以 Function Layer 就可以通过调用 Gadget Api 来动态分配 Endpoint 了。例如: static int acm_bind(struct usb_configuration *c, struct usb_function *f) { /* allocate instance-specific endpoints */ /* (1) ...
;/* (2.2) 初始化 endpoint 的结构体成员 */hs_ep->parent = hsotg;hs_ep->ep.name = hs_ep->name;if (hsotg->params.speed == DWC2_SPEED_PARAM_LOW)usb_ep_set_maxpacket_limit(&hs_ep->ep, 8);elseusb_ep_set_maxpacket_limit(&hs_ep->ep,epnum ? 1024 : EP0_MPS_LIMIT);/* (2...
devices_init()函数是在设备驱动模型初始化时调用的部分初始函数,它实现的功能是建立sysfs中的devices目录和dev目录,然后在dev目录下建立block和char两个子目录,block和char目录用来存放设备号文件。 #defineto_dev_attr(_attr) container_of(_attr, struct device_attribute, attr)staticssize_t dev_attr_show(struc...
因此在device node创建之前需要先从device tree中解析出memory信息,故内核通过early_init_dt_scan接口实现了early的设备树信息扫描接口,以解析memory以及bootargs等一些启动早期需要使用的信息。 在memory节点解析完成并被加入memblock之后,即可通过memblock为device node分配内存,从而可将完整的device tree信息解析到device node...
由于内存配置信息是由device tree传入的,而将device tree解析为device node的流程中需要为node和property分配内存。因此在device node创建之前需要先从device tree中解析出memory信息,故内核通过early_init_dt_scan接口实现了early的设备树信息扫描接口,以解析memory以及bootargs等一些启动早期需要使用的信息。
Description:The compatible property value consists of one or more strings that define the specific programming model for the device. This list of strings should be used by a client program for device driver selection. The property value consists of a concatenated list of null terminated strings, ...
Supported Countries/Regions (by the Data Donation Capability) Drive Kit About the Service Version Change History Android Getting Started Preparations Configuring App Information in AppGallery Connect Accessing Drive Kit App Development Function Description Obtaining Authentication Information Obt...
device.h>#define DRIVER_NAME "imx6ul,dts-tree"staticintdevtree_probe(structplatform_device*pdev){structfwnode_handle*child;constchar*p1,*p2[3];u32p3[2],value;u8testmac[6];inti=0;printk(KERN_INFO"\n***devtree_probe***\n");device_property_read_string(&pdev->dev,"test-string",&p1...
If the stdin-path property is not specified, stdout-path should be assumed to define the input device. stdin-path O <string> A string that specifies the full path to the node representing the device to be used for boot console input. If the character “:” is present in the value it...
RK_FUNC_1,RK_FUNC_GPIO 的定义在 kernel/include/dt-bindings/pinctrl/rk.h 中: #define RK_FUNC_GPIO 0 #define RK_FUNC_1 1 #define RK_FUNC_2 2 #define RK_FUNC_3 3 #define RK_FUNC_4 4 #define RK_FUNC_5 5 #define RK_FUNC_6 6 #define RK_FUNC_7 7 另外,像”1 11”,”1 12...