diff --git a/artiq/gateware/targets/kasli.py b/artiq/gateware/targets/kasli.py
index 7ed52052b..f080b4fd0 100755
--- a/artiq/gateware/targets/kasli.py
+++ b/artiq/gateware/targets/kasli.py
@@ -27,59 +27,6 @@ from artiq.gateware.drtio import *
 from artiq.build_soc import *
 
 
-class _RTIOCRG(Module, AutoCSR):
-    def __init__(self, platform):
-        self.pll_reset = CSRStorage(reset=1)
-        self.pll_locked = CSRStatus()
-        self.clock_domains.cd_rtio = ClockDomain()
-        self.clock_domains.cd_rtiox4 = ClockDomain(reset_less=True)
-
-        if platform.hw_rev == "v2.0":
-            clk_synth = platform.request("cdr_clk_clean_fabric")
-        else:
-            clk_synth = platform.request("si5324_clkout_fabric")
-        clk_synth_se = Signal()
-        platform.add_period_constraint(clk_synth.p, 8.0)
-        self.specials += [
-            Instance("IBUFGDS",
-                p_DIFF_TERM="TRUE", p_IBUF_LOW_PWR="FALSE",
-                i_I=clk_synth.p, i_IB=clk_synth.n, o_O=clk_synth_se),
-        ]
-
-        pll_locked = Signal()
-        rtio_clk = Signal()
-        rtiox4_clk = Signal()
-        fb_clk = Signal()
-        self.specials += [
-            Instance("PLLE2_ADV",
-                     p_STARTUP_WAIT="FALSE", o_LOCKED=pll_locked,
-                     p_BANDWIDTH="HIGH",
-                     p_REF_JITTER1=0.001,
-                     p_CLKIN1_PERIOD=8.0, p_CLKIN2_PERIOD=8.0,
-                     i_CLKIN2=clk_synth_se,
-                     # Warning: CLKINSEL=0 means CLKIN2 is selected
-                     i_CLKINSEL=0,
-
-                     # VCO @ 1.5GHz when using 125MHz input
-                     p_CLKFBOUT_MULT=12, p_DIVCLK_DIVIDE=1,
-                     i_CLKFBIN=fb_clk,
-                     i_RST=self.pll_reset.storage,
-
-                     o_CLKFBOUT=fb_clk,
-
-                     p_CLKOUT0_DIVIDE=3, p_CLKOUT0_PHASE=0.0,
-                     o_CLKOUT0=rtiox4_clk,
-
-                     p_CLKOUT1_DIVIDE=12, p_CLKOUT1_PHASE=0.0,
-                     o_CLKOUT1=rtio_clk),
-            Instance("BUFG", i_I=rtio_clk, o_O=self.cd_rtio.clk),
-            Instance("BUFG", i_I=rtiox4_clk, o_O=self.cd_rtiox4.clk),
-
-            AsyncResetSynchronizer(self.cd_rtio, ~pll_locked),
-            MultiReg(pll_locked, self.pll_locked.status)
-        ]
-
-
 class SMAClkinForward(Module):
     def __init__(self, platform):
         sma_clkin = platform.request("sma_clkin")
@@ -118,6 +65,8 @@ class StandaloneBase(MiniSoC, AMPSoC):
                          integrated_sram_size=8192,
                          ethmac_nrxslots=4,
                          ethmac_ntxslots=4,
+                         clk_freq=kwargs.get("rtio_frequency", 125.0e6),
+                         rtio_sys_merge=True,
                          **kwargs)
         AMPSoC.__init__(self)
         add_identifier(self, gateware_identifier_str=gateware_identifier_str)
@@ -136,8 +85,6 @@ class StandaloneBase(MiniSoC, AMPSoC):
         self.config["SI5324_SOFT_RESET"] = None
 
     def add_rtio(self, rtio_channels, sed_lanes=8):
-        self.submodules.rtio_crg = _RTIOCRG(self.platform)
-        self.csr_devices.append("rtio_crg")
         fix_serdes_timing_path(self.platform)
         self.submodules.rtio_tsc = rtio.TSC("async", glbl_fine_ts_width=3)
         self.submodules.rtio_core = rtio.Core(self.rtio_tsc, rtio_channels, lane_count=sed_lanes)
@@ -157,10 +104,6 @@ class StandaloneBase(MiniSoC, AMPSoC):
             self.submodules.rtio_moninj = rtio.MonInj(rtio_channels)
             self.csr_devices.append("rtio_moninj")
 
-        self.platform.add_false_path_constraints(
-            self.crg.cd_sys.clk,
-            self.rtio_crg.cd_rtio.clk)
-
         self.submodules.rtio_analyzer = rtio.Analyzer(self.rtio_tsc, self.rtio_core.cri,
                                                       self.get_native_sdram_if(), cpu_dw=self.cpu_dw)
         self.csr_devices.append("rtio_analyzer")
@@ -247,8 +190,6 @@ class SUServo(StandaloneBase):
         self.add_rtio(self.rtio_channels)
 
         pads = self.platform.lookup_request("sampler3_adc_data_p")
-        self.platform.add_false_path_constraints(
-            pads.clkout, self.rtio_crg.cd_rtio.clk)
         self.platform.add_false_path_constraints(
             pads.clkout, self.crg.cd_sys.clk)