diff --git a/artiq/firmware/libboard_artiq/si5324.rs b/artiq/firmware/libboard_artiq/si5324.rs
index 574e1ba53..147cb2302 100644
--- a/artiq/firmware/libboard_artiq/si5324.rs
+++ b/artiq/firmware/libboard_artiq/si5324.rs
@@ -1,5 +1,7 @@
 use core::result;
-use board::{csr, clock};
+use board::clock;
+#[cfg(not(si5324_soft_reset))]
+use board::csr;
 use i2c;
 
 type Result<T> = result::Result<T, &'static str>;
@@ -7,23 +9,27 @@ type Result<T> = result::Result<T, &'static str>;
 const BUSNO: u8 = 0;
 const ADDRESS: u8 = 0x68;
 
-#[cfg(any(soc_platform = "sayma_amc", soc_platform = "kc705"))]
-fn pca9548_select(address: u8, channel: u8) -> Result<()> {
+#[cfg(any(soc_platform = "kasli",
+          soc_platform = "sayma_amc",
+          soc_platform = "kc705"))]
+fn pca9548_select(address: u8, channels: u8) -> Result<()> {
     i2c::start(BUSNO).unwrap();
     if !i2c::write(BUSNO, (address << 1)).unwrap() {
         return Err("PCA9548 failed to ack write address")
     }
-    if !i2c::write(BUSNO, 1 << channel).unwrap() {
+    if !i2c::write(BUSNO, channels).unwrap() {
         return Err("PCA9548 failed to ack control word")
     }
     i2c::stop(BUSNO).unwrap();
     Ok(())
 }
 
-fn reset(en: bool) {
-    unsafe {
-        csr::si5324_rst_n::out_write(if en { 0 } else { 1 })
-    }
+#[cfg(not(si5324_soft_reset))]
+fn hard_reset() {
+    unsafe { csr::si5324_rst_n::out_write(0); }
+    clock::spin_us(1_000);
+    unsafe { csr::si5324_rst_n::out_write(1); }
+    clock::spin_us(10_000);
 }
 
 // NOTE: the logical parameters DO NOT MAP to physical values written
@@ -127,6 +133,13 @@ fn ident() -> Result<u16> {
     Ok(((read(134)? as u16) << 8) | (read(135)? as u16))
 }
 
+#[cfg(si5324_soft_reset)]
+fn soft_reset() -> Result<()> {
+    write(136, read(136)? | 0x80)?;
+    clock::spin_us(10_000);
+    Ok(())
+}
+
 fn has_xtal() -> Result<bool> {
     Ok((read(129)? & 0x01) == 0)  // LOSX_INT=0
 }
@@ -154,20 +167,26 @@ fn monitor_lock() -> Result<()> {
 pub fn setup(settings: &FrequencySettings) -> Result<()> {
     let s = map_frequency_settings(settings)?;
 
-    reset(true);
-    clock::spin_us(1_000);
-    reset(false);
-    clock::spin_us(10_000);
+    #[cfg(not(si5324_soft_reset))]
+    hard_reset();
 
-    #[cfg(soc_platform = "kc705")]
-    pca9548_select(0x74, 7)?;
+    #[cfg(soc_platform = "kasli")]
+    {
+        pca9548_select(0x70, 0)?;
+        pca9548_select(0x71, 1 << 3)?;
+    }
     #[cfg(soc_platform = "sayma_amc")]
-    pca9548_select(0x70, 4)?;
+    pca9548_select(0x70, 1 << 4)?;
+    #[cfg(soc_platform = "kc705")]
+    pca9548_select(0x74, 1 << 7)?;
 
     if ident()? != 0x0182 {
         return Err("Si5324 does not have expected product number");
     }
 
+    #[cfg(si5324_soft_reset)]
+    soft_reset()?;
+
     write(0,   read(0)? | 0x40)?;                         // FREE_RUN=1
     write(2,   (read(2)? & 0x0f) | (s.bwsel << 4))?;
     write(21,  read(21)? & 0xfe)?;                        // CKSEL_PIN=0