S3C_PCM_CTL
ctl = readl(regs + S3C_PCM_CTL);
writel(ctl, regs + S3C_PCM_CTL);
ctl = readl(regs + S3C_PCM_CTL);
writel(ctl, regs + S3C_PCM_CTL);
ctl = readl(regs + S3C_PCM_CTL);
writel(ctl, regs + S3C_PCM_CTL);