6.1使用设备树给DM9000网卡_触摸屏指定中断

流程

修改方法:

   根据设备节点的compatible属性, 
   在驱动程序中构造/注册 platform_driver,
   在 platform_driver 的 probe 函数中获得中断资源

1.给dm9000网卡指定中断

/*bank4*/
srom-cs4@20000000 {
		compatible = "simple-bus";
		#address-cells = <1>;
		#size-cells = <1>;
		reg = <0x20000000 0x8000000>;//起始地址  128M
		ranges;

		ethernet@20000000 {
			compatible = "davicom,dm9000";
			reg = <0x20000000 0x2 0x20000004 0x2>;
			interrupt-parent = <&gpf>;
			interrupts = <7 IRQ_TYPE_EDGE_RISING>;
			local-mac-address = [00 00 de ad be ef];
			davicom,no-eeprom;
		};
	};

仿照设备树–按键中断程序，在原驱动程序中添加

#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/of_platform.h>



static int dm9000drv_probe(struct platform_device *pdev)
{
	struct device *dev = &pdev->dev;		
	struct device_node *dp_node = dev->of_node;
	struct r