SSP_FIFO_CTRL
writel(val, drv_data->base + SSP_FIFO_CTRL);
val = readl(drv_data->base + SSP_FIFO_CTRL);
writel(val, drv_data->base + SSP_FIFO_CTRL);
val = readl(drv_data->base + SSP_FIFO_CTRL);
writel(val, drv_data->base + SSP_FIFO_CTRL);