摘要： updating unsigned tmp; //gpe1 pull up,置位3:2=10b，其余不变 tmp = readl(S3C64XX_GPEPUD); tmp &= ~(2<<2); tmp |= 2<<2; writel(tmp,S3C64XX_GPEPUD); //gpe1 output mode，置位7:6:5:4=0001b,其余不变 tmp =readl(S3C64XX_GPECON); tmp &= ~(F<<4); tmp |= 1<<4; writel(tmp,S3C64XX_GPECON); //gp 阅读全文