011_Linux驱动之_s3c2410_gpio_getpin

功能：获取引脚状态 函数原型： unsigned int s3c2410_gpio_getpin(unsigned int pin) { void __iomem *base = S3C24XX_GPIO_BASE(pin); unsigned long offs = S3C2410_GPIO_OFFSET(pin); return __raw_readl(base + 0x04) & (1<<

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