# RE: \[PATCH 1/2\] video: Add i.MX23/28 framebuffer driver

- From: Li Frank-B20596 \<hidden\>
- Date: 2011-02-10 09:23:34 
- List: linux-fbdev
- Page: https://ratatoskr.run/linux-fbdev/2011/02/8568197
- Thread: https://ratatoskr.run/linux-arm-kernel/2011/02/8568114/t.md

```text
> +
> +	/* if it was disabled, re-enable the mode again */
> +	reg = readl(host->base + CTRL);
> +	reg |= CTRL_DOTCLK_MODE;
> +	writel(reg, host->base + CTRL);

writel(CTRL_DOTCLK_MODE, host->base + CTRL_SET)
CTRL_SET is CTRL+0x4
SET and CLR register is easier than Read and write back.



```