diff --git a/artiq/firmware/runtime/lib.rs b/artiq/firmware/runtime/lib.rs
index 805c52a22..d7c4a8154 100644
--- a/artiq/firmware/runtime/lib.rs
+++ b/artiq/firmware/runtime/lib.rs
@@ -82,8 +82,6 @@ fn startup() {
     #[cfg(has_ad9154)]
     board::ad9154::init().expect("cannot initialize AD9154");
 
-    #[cfg(rgmii_clock_rerouted)]
-    setup_rgmii_si5324();
     #[cfg(has_ethmac)]
     startup_ethernet();
     #[cfg(not(has_ethmac))]
@@ -93,27 +91,6 @@ fn startup() {
     }
 }
 
-#[cfg(rgmii_clock_rerouted)]
-fn setup_rgmii_si5324()
-{
-    const SI5324_SETTINGS: board::si5324::FrequencySettings
-            = board::si5324::FrequencySettings {
-        n1_hs  : 5,
-        nc1_ls : 8,
-        n2_hs  : 7,
-        n2_ls  : 360,
-        n31    : 63,
-        n32    : 63,
-        bwsel  : 4
-    };
-    info!("rerouting RGMII clock through Si5324");
-    unsafe { board::csr::ethphy::crg_reset_write(1); }
-    board::i2c::init();
-    board::si5324::setup(&SI5324_SETTINGS).expect("cannot initialize Si5324");
-    board::si5324::select_ext_input(true).expect("failed to select Si5324 input");
-    unsafe { board::csr::ethphy::crg_reset_write(0); }
-}
-
 #[cfg(has_ethmac)]
 fn startup_ethernet() {
     let hardware_addr;
diff --git a/artiq/gateware/targets/sayma_amc_standalone.py b/artiq/gateware/targets/sayma_amc_standalone.py
index e91a8317e..d4a985a92 100755
--- a/artiq/gateware/targets/sayma_amc_standalone.py
+++ b/artiq/gateware/targets/sayma_amc_standalone.py
@@ -140,15 +140,6 @@ class SaymaAMCStandalone(MiniSoC, AMPSoC):
             serial_rtm.tx.eq(serial_1.rx)
         ]
 
-        # Si5324 used to work around RGMII clock routing issue on first PCB revision
-        self.submodules.si5324_rst_n = gpio.GPIOOut(platform.request("si5324").rst_n)
-        self.csr_devices.append("si5324_rst_n")
-        i2c = self.platform.request("i2c")
-        self.submodules.i2c = gpio.GPIOTristate([i2c.scl, i2c.sda])
-        self.csr_devices.append("i2c")
-        self.config["I2C_BUS_COUNT"] = 1
-        self.config["HAS_SI5324"] = None
-
         # AMC/RTM serwb
         serwb_pll = serwb.phy.SERWBPLL(125e6, 1.25e9, vco_div=2)
         self.comb += serwb_pll.refclk.eq(self.crg.cd_sys.clk)