CISR
camera_status = __raw_readl(pcdev->base + CISR);
__raw_readl(pcdev->base + CISR));
status = __raw_readl(pcdev->base + CISR);
__raw_writel(status, pcdev->base + CISR);
__raw_writel(__raw_readl(pcdev->base + CISR), pcdev->base + CISR);