ACPI 规范中 _HID _CID _UID 分别是什么意思呢,区别是什么呢,特别一直搞不清楚三者之间的关系与联系.
在我自己的板子上,有4个LED 灯两个LED灯指示 状态,两个LED灯指示充电,有两种方式在ACPI 中表示它们:
HID 是一样,然后用UID 去区别?
HID 去区分 不同类型LED,然后在用UID 索引
最好是用哪种呢?或者还有其它方法没
比如 (HID号只是在这里举例子)
只用UID 去索引:
充电的LED:
LED1 HID = LED0001 UID = 1
LED2 HID =LED0001 UID = 2
状态的LED:
LED1 HID = LED0001 UID = 3
LED2 HID =LED0001 UID = 4
用HID和UID 去索引: 但是这种会注册很多 HID,因为HID 是唯一的在公司内部,浪费资源
充电的LED:
LED1 HID = LED0001 UID = 1
LED2 HID =LED0001 UID = 2
状态的LED:
LED1 HID = LED0002 UID = 1
LED2 HID =LED0002 UID = 2