IMX_MU_TSR
[IMX_MU_TSR] = 0x20,
[IMX_MU_TSR] = 0x60,
[IMX_MU_TSR] = 0x124,
status = imx_mu_read(priv, priv->dcfg->xSR[IMX_MU_TSR]);
ret = readl_poll_timeout(priv->base + priv->dcfg->xSR[IMX_MU_TSR],
val = imx_mu_read(priv, priv->dcfg->xSR[IMX_MU_TSR]);