SSIFCR_SSIRST
rz_ssi_reg_mask_setl(ssi, SSIFCR, 0, SSIFCR_SSIRST);
rz_ssi_reg_mask_setl(ssi, SSIFCR, SSIFCR_SSIRST, 0);
return readl_poll_timeout_atomic(ssi->base + SSIFCR, tmp, !(tmp & SSIFCR_SSIRST), 1, 5);