I/O驅動相關__raw_readl和__raw_writel
1.S3C2410_GPB5是端口編號，定義在regs-gpio.h中， #define S3C2410_GPIO_BANKB (32*1) #define S3C2410_GPIONO(ban ...
原文：what is the difference between writel(), writel_relaxed, _raw_writel() in linux kernel
what is the difference between writel , writel relaxed, raw writel writel write to thelittle endianhardware register withcompiler memory barrier, writel relaxed as above,withoutbarrier, raw writel as ...
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