@@ -25,6 +25,7 @@ The Banana Pi M2U machine supports the following devices:
* SATA
* TWI (I2C)
* USB 2.0
+ * Hardware Watchdog
Limitations
"""""""""""
@@ -33,7 +34,6 @@ Currently, Banana Pi M2U does *not* support the following features:
- Graphical output via HDMI, GPU and/or the Display Engine
- Audio output
-- Hardware Watchdog
- Real Time Clock
Also see the 'unimplemented' array in the Allwinner R40 SoC module
@@ -411,6 +411,7 @@ config ALLWINNER_R40
select AHCI
select ALLWINNER_SRAMC
select ALLWINNER_A10_PIT
+ select ALLWINNER_WDT
select AXP2XX_PMU
select SERIAL
select ARM_TIMER
@@ -53,6 +53,7 @@ const hwaddr allwinner_r40_memmap[] = {
[AW_R40_DEV_OHCI2] = 0x01c1c400,
[AW_R40_DEV_CCU] = 0x01c20000,
[AW_R40_DEV_PIT] = 0x01c20c00,
+ [AW_R40_DEV_WDT] = 0x01c20c90,
[AW_R40_DEV_UART0] = 0x01c28000,
[AW_R40_DEV_UART1] = 0x01c28400,
[AW_R40_DEV_UART2] = 0x01c28800,
@@ -279,6 +280,8 @@ static void allwinner_r40_init(Object *obj)
object_property_add_alias(obj, "clk1-freq", OBJECT(&s->timer),
"clk1-freq");
+ object_initialize_child(obj, "wdt", &s->wdt, TYPE_AW_WDT_SUN4I);
+
object_initialize_child(obj, "ccu", &s->ccu, TYPE_AW_R40_CCU);
for (int i = 0; i < AW_R40_NUM_MMCS; i++) {
@@ -553,6 +556,11 @@ static void allwinner_r40_realize(DeviceState *dev, Error **errp)
sysbus_connect_irq(SYS_BUS_DEVICE(&s->emac), 0,
qdev_get_gpio_in(DEVICE(&s->gic), AW_R40_GIC_SPI_EMAC));
+ /* WDT */
+ sysbus_realize(SYS_BUS_DEVICE(&s->wdt), &error_fatal);
+ sysbus_mmio_map_overlap(SYS_BUS_DEVICE(&s->wdt), 0,
+ allwinner_r40_memmap[AW_R40_DEV_WDT], 1);
+
/* Unimplemented devices */
for (unsigned i = 0; i < ARRAY_SIZE(r40_unimplemented); i++) {
create_unimplemented_device(r40_unimplemented[i].device_name,
@@ -33,6 +33,7 @@
#include "hw/net/allwinner-sun8i-emac.h"
#include "hw/usb/hcd-ohci.h"
#include "hw/usb/hcd-ehci.h"
+#include "hw/watchdog/allwinner-wdt.h"
#include "target/arm/cpu.h"
#include "sysemu/block-backend.h"
@@ -54,6 +55,7 @@ enum {
AW_R40_DEV_OHCI2,
AW_R40_DEV_CCU,
AW_R40_DEV_PIT,
+ AW_R40_DEV_WDT,
AW_R40_DEV_UART0,
AW_R40_DEV_UART1,
AW_R40_DEV_UART2,
@@ -114,6 +116,7 @@ struct AwR40State {
const hwaddr *memmap;
AwSRAMCState sramc;
AwA10PITState timer;
+ AwWdtState wdt;
AllwinnerAHCIState sata;
AwSdHostState mmc[AW_R40_NUM_MMCS];
EHCISysBusState ehci[AW_R40_NUM_USB];
Add watchdog timer support to Allwinner-H40 and Bananapi. The watchdog timer is added as an overlay to the Timer module memory map. Signed-off-by: Guenter Roeck <linux@roeck-us.net> --- docs/system/arm/bananapi_m2u.rst | 2 +- hw/arm/Kconfig | 1 + hw/arm/allwinner-r40.c | 8 ++++++++ include/hw/arm/allwinner-r40.h | 3 +++ 4 files changed, 13 insertions(+), 1 deletion(-)