CLKSRC
writew(CTRL_PRESCALER256, gpt_base + CR(CLKSRC));
writew(0xFFFF, gpt_base + LOAD(CLKSRC));
val = readw(gpt_base + CR(CLKSRC));
writew(val, gpt_base + CR(CLKSRC));
clocksource_mmio_init(gpt_base + COUNT(CLKSRC), "tmr1", tick_rate,
mci_writel(host, CLKSRC, 0);
mci_writel(host, CLKSRC, 0);
mci_writel(host, CLKSRC, 0);