diff --git a/linux-user/ioctls.h b/linux-user/ioctls.h
index e4c1fbf52b..789764d113 100644
--- a/linux-user/ioctls.h
+++ b/linux-user/ioctls.h
@@ -87,6 +87,8 @@
      IOCTL(RTC_EPOCH_SET, IOC_W, TYPE_ULONG)
      IOCTL(RTC_WKALM_RD, IOC_R, MK_PTR(MK_STRUCT(STRUCT_rtc_wkalrm)))
      IOCTL(RTC_WKALM_SET, IOC_W, MK_PTR(MK_STRUCT(STRUCT_rtc_wkalrm)))
+     IOCTL(RTC_PLL_GET, IOC_R, MK_PTR(MK_STRUCT(STRUCT_rtc_pll_info)))
+     IOCTL(RTC_PLL_SET, IOC_W, MK_PTR(MK_STRUCT(STRUCT_rtc_pll_info)))
 
      IOCTL(BLKROSET, IOC_W, MK_PTR(TYPE_INT))
      IOCTL(BLKROGET, IOC_R, MK_PTR(TYPE_INT))
diff --git a/linux-user/syscall_defs.h b/linux-user/syscall_defs.h
index c33432a374..9f7aad49c6 100644
--- a/linux-user/syscall_defs.h
+++ b/linux-user/syscall_defs.h
@@ -763,6 +763,16 @@ struct target_pollfd {
 #define TARGET_KDSETLED        0x4B32	/* set led state [lights, not flags] */
 #define TARGET_KDSIGACCEPT     0x4B4E
 
+struct target_rtc_pll_info {
+    int pll_ctrl;
+    int pll_value;
+    int pll_max;
+    int pll_min;
+    int pll_posmult;
+    int pll_negmult;
+    abi_long pll_clock;
+};
+
 /* real time clock ioctls */
 #define TARGET_RTC_AIE_ON           TARGET_IO('p', 0x01)
 #define TARGET_RTC_AIE_OFF          TARGET_IO('p', 0x02)
@@ -782,6 +792,10 @@ struct target_pollfd {
 #define TARGET_RTC_EPOCH_SET        TARGET_IOW('p', 0x0e, abi_ulong)
 #define TARGET_RTC_WKALM_RD         TARGET_IOR('p', 0x10, struct rtc_wkalrm)
 #define TARGET_RTC_WKALM_SET        TARGET_IOW('p', 0x0f, struct rtc_wkalrm)
+#define TARGET_RTC_PLL_GET          TARGET_IOR('p', 0x11,                      \
+                                               struct target_rtc_pll_info)
+#define TARGET_RTC_PLL_SET          TARGET_IOW('p', 0x12,                      \
+                                               struct target_rtc_pll_info)
 
 #if defined(TARGET_ALPHA) || defined(TARGET_MIPS) || defined(TARGET_SH4) ||    \
        defined(TARGET_XTENSA)
diff --git a/linux-user/syscall_types.h b/linux-user/syscall_types.h
index 3efa9536cc..5ba4155047 100644
--- a/linux-user/syscall_types.h
+++ b/linux-user/syscall_types.h
@@ -271,6 +271,15 @@ STRUCT(rtc_wkalrm,
        TYPE_CHAR, /* pending */
        MK_STRUCT(STRUCT_rtc_time)) /* time */
 
+STRUCT(rtc_pll_info,
+       TYPE_INT, /* pll_ctrl */
+       TYPE_INT, /* pll_value */
+       TYPE_INT, /* pll_max */
+       TYPE_INT, /* pll_min */
+       TYPE_INT, /* pll_posmult */
+       TYPE_INT, /* pll_negmult */
+       TYPE_LONG) /* pll_clock */
+
 STRUCT(blkpg_ioctl_arg,
        TYPE_INT, /* op */
        TYPE_INT, /* flags */