ETB_RAM_READ_POINTER
writel_relaxed(0x0, drvdata->base + ETB_RAM_READ_POINTER);
read_ptr = readl_relaxed(drvdata->base + ETB_RAM_READ_POINTER);
writel_relaxed(0x0, drvdata->base + ETB_RAM_READ_POINTER);
writel_relaxed(write_ptr, drvdata->base + ETB_RAM_READ_POINTER);
writel_relaxed(read_ptr, drvdata->base + ETB_RAM_READ_POINTER);
read_ptr = readl_relaxed(drvdata->base + ETB_RAM_READ_POINTER);
writel_relaxed(read_ptr, drvdata->base + ETB_RAM_READ_POINTER);
writel_relaxed(0x0, drvdata->base + ETB_RAM_READ_POINTER);
coresight_simple_reg32(rrp, ETB_RAM_READ_POINTER),