diff --git a/hw/arm/aspeed_ast27x0-fc.c b/hw/arm/aspeed_ast27x0-fc.c
index ba43a46207..99af87dbd7 100644
--- a/hw/arm/aspeed_ast27x0-fc.c
+++ b/hw/arm/aspeed_ast27x0-fc.c
@@ -93,6 +93,10 @@ static bool ast2700fc_ca35_init(MachineState *machine, Error **errp)
                             AST2700FC_HW_STRAP2, &error_abort);
     aspeed_soc_uart_set_chr(soc->uart, ASPEED_DEV_UART12, sc->uarts_base,
                             sc->uarts_num, serial_hd(0));
+    aspeed_soc_uart_set_chr(soc->uart, ASPEED_DEV_UART4, sc->uarts_base,
+                            sc->uarts_num, serial_hd(1));
+    aspeed_soc_uart_set_chr(soc->uart, ASPEED_DEV_UART7, sc->uarts_base,
+                            sc->uarts_num, serial_hd(2));
     if (!qdev_realize(DEVICE(&s->ca35), NULL, errp)) {
         return false;
     }
@@ -115,8 +119,6 @@ static bool ast2700fc_ca35_init(MachineState *machine, Error **errp)
 
 static bool ast2700fc_ssp_init(MachineState *machine, Error **errp)
 {
-    AspeedCoprocessorState *soc;
-    AspeedCoprocessorClass *sc;
     Ast2700FCState *s = AST2700A1FC(machine);
     AspeedSoCState *psp = ASPEED_SOC(&s->ca35);
 
@@ -132,10 +134,10 @@ static bool ast2700fc_ssp_init(MachineState *machine, Error **errp)
     object_property_set_link(OBJECT(&s->ssp), "memory",
                              OBJECT(&s->ssp_memory), &error_abort);
 
-    soc = ASPEED_COPROCESSOR(&s->ssp);
-    sc = ASPEED_COPROCESSOR_GET_CLASS(soc);
-    aspeed_soc_uart_set_chr(soc->uart, ASPEED_DEV_UART4, sc->uarts_base,
-                            sc->uarts_num, serial_hd(1));
+    object_property_set_link(OBJECT(&s->ssp), "uart",
+                             OBJECT(&psp->uart[4]), &error_abort);
+    object_property_set_int(OBJECT(&s->ssp), "uart-dev", ASPEED_DEV_UART4,
+                            &error_abort);
     object_property_set_link(OBJECT(&s->ssp), "sram",
                              OBJECT(&psp->sram), &error_abort);
     object_property_set_link(OBJECT(&s->ssp), "scu",
@@ -149,8 +151,6 @@ static bool ast2700fc_ssp_init(MachineState *machine, Error **errp)
 
 static bool ast2700fc_tsp_init(MachineState *machine, Error **errp)
 {
-    AspeedCoprocessorState *soc;
-    AspeedCoprocessorClass *sc;
     Ast2700FCState *s = AST2700A1FC(machine);
     AspeedSoCState *psp = ASPEED_SOC(&s->ca35);
 
@@ -166,10 +166,10 @@ static bool ast2700fc_tsp_init(MachineState *machine, Error **errp)
     object_property_set_link(OBJECT(&s->tsp), "memory",
                              OBJECT(&s->tsp_memory), &error_abort);
 
-    soc = ASPEED_COPROCESSOR(&s->tsp);
-    sc = ASPEED_COPROCESSOR_GET_CLASS(soc);
-    aspeed_soc_uart_set_chr(soc->uart, ASPEED_DEV_UART7, sc->uarts_base,
-                            sc->uarts_num, serial_hd(2));
+    object_property_set_link(OBJECT(&s->tsp), "uart",
+                             OBJECT(&psp->uart[7]), &error_abort);
+    object_property_set_int(OBJECT(&s->tsp), "uart-dev", ASPEED_DEV_UART7,
+                            &error_abort);
     object_property_set_link(OBJECT(&s->tsp), "sram",
                              OBJECT(&psp->sram), &error_abort);
     object_property_set_link(OBJECT(&s->tsp), "scu",
diff --git a/hw/arm/aspeed_ast27x0-ssp.c b/hw/arm/aspeed_ast27x0-ssp.c
index 577a3379c6..d12a9b8459 100644
--- a/hw/arm/aspeed_ast27x0-ssp.c
+++ b/hw/arm/aspeed_ast27x0-ssp.c
@@ -133,16 +133,10 @@ static void aspeed_soc_ast27x0ssp_init(Object *obj)
 {
     Aspeed27x0CoprocessorState *a = ASPEED27X0SSP_COPROCESSOR(obj);
     AspeedCoprocessorState *s = ASPEED_COPROCESSOR(obj);
-    AspeedCoprocessorClass *sc = ASPEED_COPROCESSOR_GET_CLASS(s);
-    int i;
 
     object_initialize_child(obj, "armv7m", &a->armv7m, TYPE_ARMV7M);
     s->sysclk = qdev_init_clock_in(DEVICE(s), "sysclk", NULL, NULL, 0);
 
-    for (i = 0; i < sc->uarts_num; i++) {
-        object_initialize_child(obj, "uart[*]", &s->uart[i], TYPE_SERIAL_MM);
-    }
-
     object_initialize_child(obj, "intc0", &a->intc[0],
                             TYPE_ASPEED_2700SSP_INTC);
     object_initialize_child(obj, "intc1", &a->intc[1],
@@ -165,7 +159,6 @@ static void aspeed_soc_ast27x0ssp_realize(DeviceState *dev_soc, Error **errp)
     AspeedCoprocessorClass *sc = ASPEED_COPROCESSOR_GET_CLASS(s);
     DeviceState *armv7m;
     g_autofree char *sdram_name = NULL;
-    int uart;
     int i;
 
     if (!clock_has_source(s->sysclk)) {
@@ -244,15 +237,19 @@ static void aspeed_soc_ast27x0ssp_realize(DeviceState *dev_soc, Error **errp)
         sysbus_connect_irq(SYS_BUS_DEVICE(&a->intc[1]), i,
                         qdev_get_gpio_in(DEVICE(&a->intc[0].orgates[0]), i));
     }
+
     /* UART */
-    for (i = 0, uart = sc->uarts_base; i < sc->uarts_num; i++, uart++) {
-        if (!aspeed_soc_uart_realize(s->memory, &s->uart[i],
-                                     sc->memmap[uart], errp)) {
-            return;
-        }
-        sysbus_connect_irq(SYS_BUS_DEVICE(&s->uart[i]), 0,
-                           aspeed_soc_ast27x0ssp_get_irq(s, uart));
-    }
+    memory_region_init_alias(&s->uart_alias, OBJECT(s), "uart.alias",
+                             &s->uart->serial.io, 0,
+                             memory_region_size(&s->uart->serial.io));
+    memory_region_add_subregion(s->memory, sc->memmap[s->uart_dev],
+                                &s->uart_alias);
+    /*
+     * Redirect the UART interrupt to the NVIC, replacing the default routing
+     * to the PSP's GIC.
+     */
+    sysbus_connect_irq(SYS_BUS_DEVICE(s->uart), 0,
+                       aspeed_soc_ast27x0ssp_get_irq(s, s->uart_dev));
 
     aspeed_mmio_map_unimplemented(s->memory, SYS_BUS_DEVICE(&s->timerctrl),
                                   "aspeed.timerctrl",
@@ -283,8 +280,6 @@ static void aspeed_soc_ast27x0ssp_class_init(ObjectClass *klass,
     dc->realize = aspeed_soc_ast27x0ssp_realize;
 
     sc->valid_cpu_types = valid_cpu_types;
-    sc->uarts_num = 13;
-    sc->uarts_base = ASPEED_DEV_UART0;
     sc->irqmap = aspeed_soc_ast27x0ssp_irqmap;
     sc->memmap = aspeed_soc_ast27x0ssp_memmap;
 }
diff --git a/hw/arm/aspeed_ast27x0-tsp.c b/hw/arm/aspeed_ast27x0-tsp.c
index a7c141678f..5b75e14206 100644
--- a/hw/arm/aspeed_ast27x0-tsp.c
+++ b/hw/arm/aspeed_ast27x0-tsp.c
@@ -133,16 +133,10 @@ static void aspeed_soc_ast27x0tsp_init(Object *obj)
 {
     Aspeed27x0CoprocessorState *a = ASPEED27X0TSP_COPROCESSOR(obj);
     AspeedCoprocessorState *s = ASPEED_COPROCESSOR(obj);
-    AspeedCoprocessorClass *sc = ASPEED_COPROCESSOR_GET_CLASS(s);
-    int i;
 
     object_initialize_child(obj, "armv7m", &a->armv7m, TYPE_ARMV7M);
     s->sysclk = qdev_init_clock_in(DEVICE(s), "sysclk", NULL, NULL, 0);
 
-    for (i = 0; i < sc->uarts_num; i++) {
-        object_initialize_child(obj, "uart[*]", &s->uart[i], TYPE_SERIAL_MM);
-    }
-
     object_initialize_child(obj, "intc0", &a->intc[0],
                             TYPE_ASPEED_2700TSP_INTC);
     object_initialize_child(obj, "intc1", &a->intc[1],
@@ -165,7 +159,6 @@ static void aspeed_soc_ast27x0tsp_realize(DeviceState *dev_soc, Error **errp)
     AspeedCoprocessorClass *sc = ASPEED_COPROCESSOR_GET_CLASS(s);
     DeviceState *armv7m;
     g_autofree char *sdram_name = NULL;
-    int uart;
     int i;
 
     if (!clock_has_source(s->sysclk)) {
@@ -244,15 +237,19 @@ static void aspeed_soc_ast27x0tsp_realize(DeviceState *dev_soc, Error **errp)
         sysbus_connect_irq(SYS_BUS_DEVICE(&a->intc[1]), i,
                         qdev_get_gpio_in(DEVICE(&a->intc[0].orgates[0]), i));
     }
+
     /* UART */
-    for (i = 0, uart = sc->uarts_base; i < sc->uarts_num; i++, uart++) {
-        if (!aspeed_soc_uart_realize(s->memory, &s->uart[i],
-                                     sc->memmap[uart], errp)) {
-            return;
-        }
-        sysbus_connect_irq(SYS_BUS_DEVICE(&s->uart[i]), 0,
-                           aspeed_soc_ast27x0tsp_get_irq(s, uart));
-    }
+    memory_region_init_alias(&s->uart_alias, OBJECT(s), "uart.alias",
+                             &s->uart->serial.io, 0,
+                             memory_region_size(&s->uart->serial.io));
+    memory_region_add_subregion(s->memory, sc->memmap[s->uart_dev],
+                                &s->uart_alias);
+    /*
+     * Redirect the UART interrupt to the NVIC, replacing the default routing
+     * to the PSP's GIC.
+     */
+    sysbus_connect_irq(SYS_BUS_DEVICE(s->uart), 0,
+                       aspeed_soc_ast27x0tsp_get_irq(s, s->uart_dev));
 
     aspeed_mmio_map_unimplemented(s->memory, SYS_BUS_DEVICE(&s->timerctrl),
                                   "aspeed.timerctrl",
@@ -283,8 +280,6 @@ static void aspeed_soc_ast27x0tsp_class_init(ObjectClass *klass,
     dc->realize = aspeed_soc_ast27x0tsp_realize;
 
     sc->valid_cpu_types = valid_cpu_types;
-    sc->uarts_num = 13;
-    sc->uarts_base = ASPEED_DEV_UART0;
     sc->irqmap = aspeed_soc_ast27x0tsp_irqmap;
     sc->memmap = aspeed_soc_ast27x0tsp_memmap;
 }
diff --git a/hw/arm/aspeed_coprocessor_common.c b/hw/arm/aspeed_coprocessor_common.c
index 14e26bbe23..f037d5b573 100644
--- a/hw/arm/aspeed_coprocessor_common.c
+++ b/hw/arm/aspeed_coprocessor_common.c
@@ -29,6 +29,9 @@ static const Property aspeed_coprocessor_properties[] = {
                      MemoryRegion *),
     DEFINE_PROP_LINK("scu", AspeedCoprocessorState, scu, TYPE_ASPEED_SCU,
                      AspeedSCUState *),
+    DEFINE_PROP_LINK("uart", AspeedCoprocessorState, uart, TYPE_SERIAL_MM,
+                     SerialMM *),
+    DEFINE_PROP_INT32("uart-dev", AspeedCoprocessorState, uart_dev, 0),
 };
 
 static void aspeed_coprocessor_class_init(ObjectClass *oc, const void *data)
diff --git a/include/hw/arm/aspeed_coprocessor.h b/include/hw/arm/aspeed_coprocessor.h
index c1f2c549c3..4a50f688ec 100644
--- a/include/hw/arm/aspeed_coprocessor.h
+++ b/include/hw/arm/aspeed_coprocessor.h
@@ -19,13 +19,15 @@ struct AspeedCoprocessorState {
     MemoryRegion sdram;
     MemoryRegion *sram;
     MemoryRegion sram_alias;
+    MemoryRegion uart_alias;
     MemoryRegion scu_alias;
     Clock *sysclk;
 
     AspeedSCUState *scu;
     AspeedSCUState scuio;
     AspeedTimerCtrlState timerctrl;
-    SerialMM uart[ASPEED_UARTS_NUM];
+    SerialMM *uart;
+    int uart_dev;
 };
 
 #define TYPE_ASPEED_COPROCESSOR "aspeed-coprocessor"
@@ -39,8 +41,6 @@ struct AspeedCoprocessorClass {
     const char * const *valid_cpu_types;
     const hwaddr *memmap;
     const int *irqmap;
-    int uarts_base;
-    int uarts_num;
 };
 
 struct Aspeed27x0CoprocessorState {