TPM_C0SC
writel(TPM_C0SC_CHF_MASK, timer_base + TPM_C0SC);
val = readl(timer_base + TPM_C0SC);
writel(val, timer_base + TPM_C0SC);
val = readl(timer_base + TPM_C0SC);
writel(val, timer_base + TPM_C0SC);