ETB_RAM_WRITE_POINTER
writel_relaxed(0x0, drvdata->base + ETB_RAM_WRITE_POINTER);
writel_relaxed(0x0, drvdata->base + ETB_RAM_WRITE_POINTER);
write_ptr = readl_relaxed(drvdata->base + ETB_RAM_WRITE_POINTER);
write_ptr = readl_relaxed(drvdata->base + ETB_RAM_WRITE_POINTER);
writel_relaxed(0x0, drvdata->base + ETB_RAM_WRITE_POINTER);
coresight_simple_reg32(rwp, ETB_RAM_WRITE_POINTER),