REG_TSC_FLOW_CONTROL
start = readl(tsc->tsc_regs + REG_TSC_FLOW_CONTROL);
writel(start, tsc->tsc_regs + REG_TSC_FLOW_CONTROL);
tsc_flow = readl(tsc->tsc_regs + REG_TSC_FLOW_CONTROL);
writel(tsc_flow, tsc->tsc_regs + REG_TSC_FLOW_CONTROL);
start = readl(tsc->tsc_regs + REG_TSC_FLOW_CONTROL);
writel(start, tsc->tsc_regs + REG_TSC_FLOW_CONTROL);