int of_get_named_gpio_flags(struct device_node *np, const char *name, int index); 参数说明: 1、np:设备树节点的指针,通常使用 of_node_get() 函数获取。 2、Name:GPIO 设备的名称。 3、index:GPIO 设备的索引值。 返回值: 1、如果成功获取 GPIO 设备的标志位,则返回标志位的整数值。 2、如果获...
gpio =of_get_named_gpio_flags(np,"lcd_bl_gpio",0, &flags);if(gpio_is_valid(gpio)) { ret = gpio_request_one(gpio, GPIOF_OUT_INIT_HIGH,"exynos4-fb");if(ret <0) {returnret; } } gpio_set_value(gpio,1);if(!of_find_property(np,"lcd_en_gpio", &value)) { dev_err(dev,"...
linux of_get_named_gpio gpio编号 -下面给出一个使用`of_get_named_gpio`函数获取Linux GPIO编号的示例代码: ```c #include <linux/gpio/consumer.h> int get_gpio_number(struct device_node *node, const char *propname) { int ret; struct gpio_desc *desc; desc = of_get_named_gpio(node, ...
你这能提取到第一个节点?很奇怪啊,你这提取函数明明要提取“green-gpios” 这个名字的gpio,结果你...
of_get_named_gpio函数of_get_named_gpio函数 查阅linux内核文档,发现of_get_named_gpio函数是属于Device Tree设备树,其属于操作系统(.OS)的的函数,其实际功能为:通过Device Tree设备树获取一个指定的GPIO接口号。 DeviceTree是一套Linux系统的设备管理机制,其主要思想是把设备描述数据以及控制程序从内核分离出去,由...
Elixir Cross Referencer - identifier references search for Linux (version v6.11.3). Searched identifier: of_get_named_gpio
but when probe function is executed it calls "of_get_named_gpio_flags" which return with -2. The same value is passed to "gpio_is_valid" function further which in turn return error. Any help would be appreciated. ラベル: Graphics & Display ...
* the GPIO. */intof_get_named_gpio_flags(struct device_node *np,constchar*propname,intindex,enumof_gpio_flags *flags){structof_phandle_argsout_args;structdevice_d*dev;intret; ret = of_parse_phandle_with_args(np, propname,"#gpio-cells", ...
of_get_named_gpio_flags获取dts中gpio编号,并且会找到device_node,找到of_gpio_flags。 gpio_request申请gpio gpio_direction_output设置成output且set gpio val intof_get_named_gpio_flags(structdevice_node *np,constchar*list_name,intindex,enumof_gpio_flags *flags);intgpio_request(unsignedgpio,constchar...
*/ int of_get_named_gpio_flags(struct device_node *np, const char *propname, int index, enum of_gpio_flags *flags) { struct of_phandle_args out_args; struct device_d *dev; int ret; ret = of_parse_phandle_with_args(np, propname, "#gpio-cells", index, &out_args); if ...