WDT_RATE_1MHZ
aspeed_wdt_enable(wdt, wdd->timeout * WDT_RATE_1MHZ);
writel(actual * WDT_RATE_1MHZ, wdt->base + WDT_RELOAD_VALUE);
u32 actual = pretimeout * WDT_RATE_1MHZ;
aspeed_wdt_enable(wdt, 128 * WDT_RATE_1MHZ / 1000);