hw/top_earlgrey/cdc/cdc_waivers.spi_device.tcl

# Copyright lowRISC contributors.
# Licensed under the Apache License, Version 2.0, see LICENSE for details.
# SPDX-License-Identifier: Apache-2.0
#
# Verix CDC waiver file
# Expression:
#  ControlSignal==""
#  ReconSignal==""
#  MultiClockDomains=="IO_DIV2_CLK::IO_DIV4_CLK"

set_rule_status -rule {W_RECON_GROUPS} -status {Waived}         \
   -expression {(ControlSignal=~"*u_status_23_to_1_sync.*") &&       \
                (ReconSignal=~"*u_spid_status.outclk_p2s_byte_*")} \
   -comment {status bits are converged into SPI line. But transmit bit-by-bit. OK to send old and new status bits in a transaction}

set_rule_status -rule {W_CNTL} -status {Waived}   \
   -expression {(Signal=~"*u_spi_device.rxf_full_q*") && \
    (ReceivingFlop=~"*u_spi_device.u_sync_rxf*")} \
   -comment {2FF synchronizer covers the clock domain crossing. RECONV is not waived.}

# TODO: Create more specific Flop instance inside prim_flop_2sync to waive broadly.
set_rule_status -rule {W_CNTL} -status {Waived} \
   -expression {(Signal=~"*u_spi_device*_*ptr_gray_q*") && \
    (ReceivingFlop=~"*u_spi_device*u_sync_1.*")} \
   -comment {2FF sync for gray code.}