Re: [Qemu-arm] [PATCH for-2.9 30/30] wdt: aspeed: use scu to get clock freq

[Cédric Le Goater]

This is a duplicate also.

Sorry for the noise.

C. 

11/29/2016 05:07 PM, Cédric Le Goater wrote:
> Add a link to the object model and a helper routine to retrieve the
> value instead of using a constant value.
> 
> Signed-off-by: Cédric Le Goater <address@hidden>
> Reviewed-by: Joel Stanley <address@hidden>
> ---
>  hw/arm/aspeed_soc.c              |  2 ++
>  hw/watchdog/wdt_aspeed.c         | 19 +++++++++++++++----
>  include/hw/watchdog/wdt_aspeed.h |  2 ++
>  3 files changed, 19 insertions(+), 4 deletions(-)
> 
> diff --git a/hw/arm/aspeed_soc.c b/hw/arm/aspeed_soc.c
> index 6df76382f007..712ae9d6c54d 100644
> --- a/hw/arm/aspeed_soc.c
> +++ b/hw/arm/aspeed_soc.c
> @@ -175,6 +175,8 @@ static void aspeed_soc_init(Object *obj)
>      object_initialize(&s->wdt, sizeof(s->wdt), TYPE_ASPEED_WDT);
>      object_property_add_child(obj, "wdt", OBJECT(&s->wdt), NULL);
>      qdev_set_parent_bus(DEVICE(&s->wdt), sysbus_get_default());
> +    object_property_add_const_link(OBJECT(&s->wdt), "scu", OBJECT(&s->scu),
> +                                   NULL);
>  }
>  
>  static void aspeed_soc_realize(DeviceState *dev, Error **errp)
> diff --git a/hw/watchdog/wdt_aspeed.c b/hw/watchdog/wdt_aspeed.c
> index cdba3983b7af..01266fb1b76b 100644
> --- a/hw/watchdog/wdt_aspeed.c
> +++ b/hw/watchdog/wdt_aspeed.c
> @@ -7,10 +7,12 @@
>  
>  #include "qemu/osdep.h"
>  #include "qemu/log.h"
> +#include "qapi/error.h"
>  #include "sysemu/watchdog.h"
>  #include "hw/sysbus.h"
>  #include "qemu/timer.h"
>  #include "hw/watchdog/wdt_aspeed.h"
> +#include "hw/misc/aspeed_scu.h"
>  
>  #define WDT_IO_REGION_SIZE      0x20
>  
> @@ -56,8 +58,6 @@ static uint64_t aspeed_wdt_read(void *opaque, hwaddr 
> offset, unsigned size)
>  
>  }
>  
> -#define PCLK_HZ 24000000
> -
>  static void aspeed_wdt_write(void *opaque, hwaddr offset, uint64_t data,
>                               unsigned size)
>  {
> @@ -82,7 +82,7 @@ static void aspeed_wdt_write(void *opaque, hwaddr offset, 
> uint64_t data,
>  
>              if (pclk) {
>                  reload = muldiv64(s->reg_reload_value, 
> NANOSECONDS_PER_SECOND,
> -                                  PCLK_HZ) ;
> +                                  s->pclk_freq);
>              } else {
>                  reload = s->reg_reload_value * 1000;
>              }
> @@ -99,7 +99,7 @@ static void aspeed_wdt_write(void *opaque, hwaddr offset, 
> uint64_t data,
>  
>              if (pclk) {
>                  reload = muldiv64(s->reg_reload_value, 
> NANOSECONDS_PER_SECOND,
> -                                  PCLK_HZ);
> +                                  s->pclk_freq);
>              } else {
>                  reload = s->reg_reload_value * 1000;
>              }
> @@ -177,10 +177,21 @@ static void aspeed_wdt_realize(DeviceState *dev, Error 
> **errp)
>  {
>      SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
>      AspeedWDTState *s = ASPEED_WDT(dev);
> +    Object *obj;
> +    Error *err = NULL;
>  
>      s->timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, aspeed_wdt_timer_expired,
>                              dev);
>  
> +    obj = object_property_get_link(OBJECT(dev), "scu", &err);
> +    if (!obj) {
> +        error_setg(errp, "%s: required link 'scu' not found: %s",
> +                   __func__, error_get_pretty(err));
> +        return;
> +    }
> +
> +    s->pclk_freq = aspeed_scu_get_clk(ASPEED_SCU(obj));
> +
>      memory_region_init_io(&s->iomem, OBJECT(s), &aspeed_wdt_ops, s,
>                            TYPE_ASPEED_WDT, WDT_IO_REGION_SIZE);
>      sysbus_init_mmio(sbd, &s->iomem);
> diff --git a/include/hw/watchdog/wdt_aspeed.h 
> b/include/hw/watchdog/wdt_aspeed.h
> index dbf45ae968db..0483335ecee5 100644
> --- a/include/hw/watchdog/wdt_aspeed.h
> +++ b/include/hw/watchdog/wdt_aspeed.h
> @@ -36,6 +36,8 @@ typedef struct AspeedWDTState {
>      uint32_t reg_reload_value;
>      uint32_t reg_restart;
>      uint32_t reg_ctrl;
> +
> +    uint32_t pclk_freq;
>  } AspeedWDTState;
>  
>  #endif  /* ASPEED_WDT_H */
>