Re: [Qemu-devel] [PATCH v2 1/1] char: cadence_uart: Convert to realize()

[Andreas Färber]

Am 26.02.2015 um 06:07 schrieb Alistair Francis:
> Use the DeviceClass realize() and init() instead of
> the deprecated SysBusDevice init().
> 
> Signed-off-by: Alistair Francis <address@hidden>
> ---
> V2:
>  - Simplify commit message
>  - Fix function typo
> 
>  hw/char/cadence_uart.c | 29 ++++++++++++++++-------------
>  1 file changed, 16 insertions(+), 13 deletions(-)
> 
> diff --git a/hw/char/cadence_uart.c b/hw/char/cadence_uart.c
> index 7044b35..b6ccd72 100644
> --- a/hw/char/cadence_uart.c
> +++ b/hw/char/cadence_uart.c
> @@ -476,27 +476,30 @@ static void cadence_uart_reset(DeviceState *dev)
>      uart_update_status(s);
>  }
>  
> -static int cadence_uart_init(SysBusDevice *dev)
> +static void cadence_uart_realize(DeviceState *dev, Error **errp)
>  {
>      UartState *s = CADENCE_UART(dev);
>  
> -    memory_region_init_io(&s->iomem, OBJECT(s), &uart_ops, s, "uart", 
> 0x1000);
> -    sysbus_init_mmio(dev, &s->iomem);
> -    sysbus_init_irq(dev, &s->irq);
> -
> -    s->fifo_trigger_handle = timer_new_ns(QEMU_CLOCK_VIRTUAL,
> -            (QEMUTimerCB *)fifo_trigger_update, s);
> -
> -    s->char_tx_time = (get_ticks_per_sec() / 9600) * 10;
> -
>      s->chr = qemu_char_get_next_serial();
>  
>      if (s->chr) {
>          qemu_chr_add_handlers(s->chr, uart_can_receive, uart_receive,
>                                uart_event, s);
>      }
> +}
>  
> -    return 0;
> +static void cadence_uart_init(Object *obj)
> +{
> +    UartState *s = CADENCE_UART(obj);
> +
> +    memory_region_init_io(&s->iomem, obj, &uart_ops, s, "uart", 0x1000);
> +    sysbus_init_mmio(SYS_BUS_DEVICE(obj), &s->iomem);
> +    sysbus_init_irq(SYS_BUS_DEVICE(obj), &s->irq);
> +
> +    s->fifo_trigger_handle = timer_new_ns(QEMU_CLOCK_VIRTUAL,
> +            (QEMUTimerCB *)fifo_trigger_update, s);

Is the timer created in a non-running state? Otherwise it should
probably remain in realize.

Also, why is the cast necessary?

Otherwise looks good. Via qom-next tree or ARM tree?

Regards,
Andreas

> +
> +    s->char_tx_time = (get_ticks_per_sec() / 9600) * 10;
>  }
>  
>  static int cadence_uart_post_load(void *opaque, int version_id)
> @@ -528,9 +531,8 @@ static const VMStateDescription vmstate_cadence_uart = {
>  static void cadence_uart_class_init(ObjectClass *klass, void *data)
>  {
>      DeviceClass *dc = DEVICE_CLASS(klass);
> -    SysBusDeviceClass *sdc = SYS_BUS_DEVICE_CLASS(klass);
>  
> -    sdc->init = cadence_uart_init;
> +    dc->realize = cadence_uart_realize;
>      dc->vmsd = &vmstate_cadence_uart;
>      dc->reset = cadence_uart_reset;
>  }
> @@ -539,6 +541,7 @@ static const TypeInfo cadence_uart_info = {
>      .name          = TYPE_CADENCE_UART,
>      .parent        = TYPE_SYS_BUS_DEVICE,
>      .instance_size = sizeof(UartState),
> +    .instance_init = cadence_uart_init,
>      .class_init    = cadence_uart_class_init,
>  };
>  
> 


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