INTEL_IDLELTR
writel(ltr, host->priv + INTEL_IDLELTR);
host->idle_ltr = readl(host->priv + INTEL_IDLELTR);
intel_host->idle_ltr = readl(host->ioaddr + INTEL_IDLELTR);
writel(ltr, host->ioaddr + INTEL_IDLELTR);
host->idle_ltr = readl(hba->mmio_base + INTEL_IDLELTR);
writel(ltr, hba->mmio_base + INTEL_IDLELTR);