Re: [PATCH v4 4/8] hw/misc/pca9552: Add a 'description' property for debugging purpose

["Cédric Le Goater" <clg@kaod.org>]

On 6/21/20 12:58 AM, Philippe Mathieu-Daudé wrote:
> Add a description field to distinguish between multiple devices.

Reviewed-by: Cédric Le Goater <clg@kaod.org>

Could it be a QOM attribute ? 

C.

> Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
> ---
>  include/hw/misc/pca9552.h |  1 +
>  hw/misc/pca9552.c         | 10 ++++++++++
>  2 files changed, 11 insertions(+)
> 
> diff --git a/include/hw/misc/pca9552.h b/include/hw/misc/pca9552.h
> index ef6da4988f..c5be7f1c5e 100644
> --- a/include/hw/misc/pca9552.h
> +++ b/include/hw/misc/pca9552.h
> @@ -27,6 +27,7 @@ typedef struct PCA9552State {
>  
>      uint8_t regs[PCA9552_NR_REGS];
>      uint8_t max_reg;
> +    char *description; /* For debugging purpose only */
>      uint8_t nr_leds;
>  } PCA9552State;
>  
> diff --git a/hw/misc/pca9552.c b/hw/misc/pca9552.c
> index b97fc2893c..54ccdcf6d4 100644
> --- a/hw/misc/pca9552.c
> +++ b/hw/misc/pca9552.c
> @@ -12,6 +12,7 @@
>  #include "qemu/osdep.h"
>  #include "qemu/log.h"
>  #include "qemu/module.h"
> +#include "hw/qdev-properties.h"
>  #include "hw/misc/pca9552.h"
>  #include "hw/misc/pca9552_regs.h"
>  #include "migration/vmstate.h"
> @@ -312,8 +313,16 @@ static void pca9552_realize(DeviceState *dev, Error **errp)
>                     __func__, s->nr_leds, PCA9552_PIN_COUNT);
>          return;
>      }
> +    if (!s->description) {
> +        s->description = g_strdup("pca-unspecified");
> +    }
>  }
>  
> +static Property pca9552_properties[] = {
> +    DEFINE_PROP_STRING("description", PCA9552State, description),
> +    DEFINE_PROP_END_OF_LIST(),
> +};
> +
>  static void pca9552_class_init(ObjectClass *klass, void *data)
>  {
>      DeviceClass *dc = DEVICE_CLASS(klass);
> @@ -325,6 +334,7 @@ static void pca9552_class_init(ObjectClass *klass, void *data)
>      dc->realize = pca9552_realize;
>      dc->reset = pca9552_reset;
>      dc->vmsd = &pca9552_vmstate;
> +    device_class_set_props(dc, pca9552_properties);
>  }
>  
>  static const TypeInfo pca9552_info = {
>