> + > + /* 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.