Re: [PATCH 3/4] hw/arm: Add WDT to Allwinner-H3 and Orangepi-PC

[Niek Linnenbank <nieklinnenbank@gmail.com>]

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On Sat, Mar 11, 2023 at 3:42 PM Strahinja Jankovic <
strahinjapjankovic@gmail.com> wrote:

> This patch adds WDT to Allwinner-H3 and Orangepi-PC.
> WDT is added as an overlay to the Timer module memory area.
>
> Signed-off-by: Strahinja Jankovic <strahinja.p.jankovic@gmail.com>
>

Reviewed-by: Niek Linnenbank <nieklinnenbank@gmail.com>


> ---
>  docs/system/arm/orangepi.rst  | 1 +
>  hw/arm/Kconfig                | 1 +
>  hw/arm/allwinner-h3.c         | 8 ++++++++
>  include/hw/arm/allwinner-h3.h | 5 ++++-
>  4 files changed, 14 insertions(+), 1 deletion(-)
>
> diff --git a/docs/system/arm/orangepi.rst b/docs/system/arm/orangepi.rst
> index e5973600a1..9afa54213b 100644
> --- a/docs/system/arm/orangepi.rst
> +++ b/docs/system/arm/orangepi.rst
> @@ -26,6 +26,7 @@ The Orange Pi PC machine supports the following devices:
>   * System Control module
>   * Security Identifier device
>   * TWI (I2C)
> + * Watchdog timer
>
>  Limitations
>  """""""""""
> diff --git a/hw/arm/Kconfig b/hw/arm/Kconfig
> index ec15248536..7d916f5450 100644
> --- a/hw/arm/Kconfig
> +++ b/hw/arm/Kconfig
> @@ -337,6 +337,7 @@ config ALLWINNER_H3
>      select ALLWINNER_A10_PIT
>      select ALLWINNER_SUN8I_EMAC
>      select ALLWINNER_I2C
> +    select ALLWINNER_WDT
>      select SERIAL
>      select ARM_TIMER
>      select ARM_GIC
> diff --git a/hw/arm/allwinner-h3.c b/hw/arm/allwinner-h3.c
> index 69d0ad6f50..f05afddf7e 100644
> --- a/hw/arm/allwinner-h3.c
> +++ b/hw/arm/allwinner-h3.c
> @@ -49,6 +49,7 @@ const hwaddr allwinner_h3_memmap[] = {
>      [AW_H3_DEV_OHCI3]      = 0x01c1d400,
>      [AW_H3_DEV_CCU]        = 0x01c20000,
>      [AW_H3_DEV_PIT]        = 0x01c20c00,
> +    [AW_H3_DEV_WDT]        = 0x01c20ca0,
>      [AW_H3_DEV_UART0]      = 0x01c28000,
>      [AW_H3_DEV_UART1]      = 0x01c28400,
>      [AW_H3_DEV_UART2]      = 0x01c28800,
> @@ -234,6 +235,8 @@ static void allwinner_h3_init(Object *obj)
>      object_initialize_child(obj, "twi1",  &s->i2c1,  TYPE_AW_I2C_SUN6I);
>      object_initialize_child(obj, "twi2",  &s->i2c2,  TYPE_AW_I2C_SUN6I);
>      object_initialize_child(obj, "r_twi", &s->r_twi, TYPE_AW_I2C_SUN6I);
> +
> +    object_initialize_child(obj, "wdt", &s->wdt, TYPE_AW_WDT_SUN6I);
>  }
>
>  static void allwinner_h3_realize(DeviceState *dev, Error **errp)
> @@ -453,6 +456,11 @@ static void allwinner_h3_realize(DeviceState *dev,
> Error **errp)
>      sysbus_connect_irq(SYS_BUS_DEVICE(&s->r_twi), 0,
>                         qdev_get_gpio_in(DEVICE(&s->gic),
> AW_H3_GIC_SPI_R_TWI));
>
> +    /* WDT */
> +    sysbus_realize(SYS_BUS_DEVICE(&s->wdt), &error_fatal);
> +    sysbus_mmio_map_overlap(SYS_BUS_DEVICE(&s->wdt), 0,
> +                            s->memmap[AW_H3_DEV_WDT], 1);
> +
>      /* Unimplemented devices */
>      for (i = 0; i < ARRAY_SIZE(unimplemented); i++) {
>          create_unimplemented_device(unimplemented[i].device_name,
> diff --git a/include/hw/arm/allwinner-h3.h b/include/hw/arm/allwinner-h3.h
> index 59e0f822d2..f15d6d7cc7 100644
> --- a/include/hw/arm/allwinner-h3.h
> +++ b/include/hw/arm/allwinner-h3.h
> @@ -48,6 +48,7 @@
>  #include "hw/net/allwinner-sun8i-emac.h"
>  #include "hw/rtc/allwinner-rtc.h"
>  #include "hw/i2c/allwinner-i2c.h"
> +#include "hw/watchdog/allwinner-wdt.h"
>  #include "target/arm/cpu.h"
>  #include "sysemu/block-backend.h"
>
> @@ -96,7 +97,8 @@ enum {
>      AW_H3_DEV_RTC,
>      AW_H3_DEV_CPUCFG,
>      AW_H3_DEV_R_TWI,
> -    AW_H3_DEV_SDRAM
> +    AW_H3_DEV_SDRAM,
> +    AW_H3_DEV_WDT
>  };
>
>  /** Total number of CPU cores in the H3 SoC */
> @@ -141,6 +143,7 @@ struct AwH3State {
>      AWI2CState r_twi;
>      AwSun8iEmacState emac;
>      AwRtcState rtc;
> +    AwWdtState wdt;
>      GICState gic;
>      MemoryRegion sram_a1;
>      MemoryRegion sram_a2;
> --
> 2.30.2
>
>

-- 
Niek Linnenbank

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