SCB_CONTROL_REG
img_i2c_writel(i2c, SCB_CONTROL_REG, 0);
img_i2c_writel(i2c, SCB_CONTROL_REG,
val = img_i2c_readl(i2c, SCB_CONTROL_REG);
img_i2c_writel(i2c, SCB_CONTROL_REG, val);