Re: [PATCH 05/12] linux-user: Add support for getting/setting RTC PLL correction using ioctls

[Laurent Vivier <laurent@vivier.eu>]

Le 09/01/2020 à 13:59, Filip Bozuta a écrit :
> This patch implements functionalities of following ioctls:
> 
> RTC_PLL_GET - Getting PLL correction
> 
>     Read the PLL correction for RTCs that support PLL. The PLL correction
>     is returned in the following structure:
> 
>         struct rtc_pll_info {
>             int pll_ctrl;        /* placeholder for fancier control */
>             int pll_value;       /* get/set correction value */
>             int pll_max;         /* max +ve (faster) adjustment value */
>             int pll_min;         /* max -ve (slower) adjustment value */
>             int pll_posmult;     /* factor for +ve correction */
>             int pll_negmult;     /* factor for -ve correction */
>             long pll_clock;      /* base PLL frequency */
>         };
> 
>     A pointer to this structure should be passed as the third
>     ioctl's argument.
> 
> RTC_PLL_SET - Setting PLL correction
> 
>     Sets the PLL correction for RTCs that support PLL. The PLL correction
>     that is set is specified by the rtc_pll_info structure pointed to by
>     the third ioctl's' argument.
> 
> Implementation notes:
> 
>     All ioctls in this patch have a pointer to a structure rtc_pll_info
>     as their third argument. All elements of this structure are of
>     type 'int', except the last one that is of type 'long'. That is
>     the reason why a separate target structure (target_rtc_pll_info)
>     is defined in linux-user/syscall_defs. The rest of the
>     implementation is straightforward.
> 
> Signed-off-by: Filip Bozuta <Filip.Bozuta@rt-rk.com>
> ---
>  linux-user/ioctls.h        |  2 ++
>  linux-user/syscall_defs.h  | 14 ++++++++++++++
>  linux-user/syscall_types.h |  9 +++++++++
>  3 files changed, 25 insertions(+)
> 
> diff --git a/linux-user/ioctls.h b/linux-user/ioctls.h
> index b09396e..0a4e3f1 100644
> --- a/linux-user/ioctls.h
> +++ b/linux-user/ioctls.h
> @@ -87,6 +87,8 @@
>       IOCTL(RTC_EPOCH_SET, IOC_W, TYPE_ULONG)
>       IOCTL(RTC_WKALM_RD, IOC_R, MK_PTR(MK_STRUCT(STRUCT_rtc_wkalrm)))
>       IOCTL(RTC_WKALM_SET, IOC_W, MK_PTR(MK_STRUCT(STRUCT_rtc_wkalrm)))
> +     IOCTL(RTC_PLL_GET, IOC_R, MK_PTR(MK_STRUCT(STRUCT_rtc_pll_info)))
> +     IOCTL(RTC_PLL_SET, IOC_W, MK_PTR(MK_STRUCT(STRUCT_rtc_pll_info)))
>  
>       IOCTL(BLKROSET, IOC_W, MK_PTR(TYPE_INT))
>       IOCTL(BLKROGET, IOC_R, MK_PTR(TYPE_INT))
> diff --git a/linux-user/syscall_defs.h b/linux-user/syscall_defs.h
> index 37504a2..8370f41 100644
> --- a/linux-user/syscall_defs.h
> +++ b/linux-user/syscall_defs.h
> @@ -763,6 +763,16 @@ struct target_pollfd {
>  #define TARGET_KDSETLED        0x4B32	/* set led state [lights, not flags] */
>  #define TARGET_KDSIGACCEPT     0x4B4E
>  
> +struct target_rtc_pll_info {
> +    int pll_ctrl;
> +    int pll_value;
> +    int pll_max;
> +    int pll_min;
> +    int pll_posmult;
> +    int pll_negmult;
> +    abi_long pll_clock;
> +};
> +
>  /* real time clock ioctls */
>  #define TARGET_RTC_AIE_ON           TARGET_IO('p', 0x01)
>  #define TARGET_RTC_AIE_OFF          TARGET_IO('p', 0x02)
> @@ -782,6 +792,10 @@ struct target_pollfd {
>  #define TARGET_RTC_EPOCH_SET        TARGET_IOW('p', 0x0e, abi_ulong)
>  #define TARGET_RTC_WKALM_RD         TARGET_IOR('p', 0x10, struct rtc_wkalrm)
>  #define TARGET_RTC_WKALM_SET        TARGET_IOW('p', 0x0f, struct rtc_wkalrm)
> +#define TARGET_RTC_PLL_GET          TARGET_IOR('p', 0x11,                      \
> +                                               struct target_rtc_pll_info)
> +#define TARGET_RTC_PLL_SET          TARGET_IOW('p', 0x12,                      \
> +                                               struct target_rtc_pll_info)
>  
>  #if defined(TARGET_ALPHA) || defined(TARGET_MIPS) || defined(TARGET_SH4) ||    \
>         defined(TARGET_XTENSA)
> diff --git a/linux-user/syscall_types.h b/linux-user/syscall_types.h
> index 820bc8e..4027272 100644
> --- a/linux-user/syscall_types.h
> +++ b/linux-user/syscall_types.h
> @@ -271,6 +271,15 @@ STRUCT(rtc_wkalrm,
>         TYPE_CHAR, /* pending */
>         MK_STRUCT(STRUCT_rtc_time)) /* time */
>  
> +STRUCT(rtc_pll_info,
> +       TYPE_INT, /* pll_ctrl */
> +       TYPE_INT, /* pll_value */
> +       TYPE_INT, /* pll_max */
> +       TYPE_INT, /* pll_min */
> +       TYPE_INT, /* pll_posmult */
> +       TYPE_INT, /* pll_negmult */
> +       TYPE_LONG) /* pll_clock */
> +
>  STRUCT(blkpg_ioctl_arg,
>         TYPE_INT, /* op */
>         TYPE_INT, /* flags */
> 

Reviewed-by: Laurent Vivier <laurent@vivier.eu>