OG01A1B_MCLK
unsigned long delay = DIV_ROUND_UP(512 * USEC_PER_SEC, OG01A1B_MCLK);
if (freq != OG01A1B_MCLK)
unsigned long delay = DIV_ROUND_UP(8192UL * USEC_PER_SEC, OG01A1B_MCLK);