GLK_DLY
dly = FIELD_PREP(GLK_DLY, FIELD_GET(GLK_PATH_PLL, glk_rx_ctrl1) +
if (dly == FIELD_GET(GLK_DLY, glk_rx_ctrl1))
glk_rx_ctrl1 = (glk_rx_ctrl1 & ~GLK_DLY) | dly;