[PATCH 3/3] Mailbox : Adding functionality to get clock rate

[Mudit Jain]

Kindly ignore this.  I have rebased and pushed all the changes in one
patch.

Thanks
Mudit

On Sat, Aug 20, 2016 at 6:55 PM, Mudit Jain <muditjain18011995 at gmail.com>
wrote:

> From: Mudit Jain <muditj at nvidia.com>
>
> ---
>  c/src/lib/libbsp/arm/raspberrypi/include/vc.h      |  8 +++++++
>  c/src/lib/libbsp/arm/raspberrypi/misc/vc.c         | 26
> ++++++++++++++++++++++
>  c/src/lib/libbsp/arm/raspberrypi/misc/vc_defines.h | 12 ++++++++++
>  3 files changed, 46 insertions(+)
>
> diff --git a/c/src/lib/libbsp/arm/raspberrypi/include/vc.h
> b/c/src/lib/libbsp/arm/raspberrypi/include/vc.h
> index 74f7557..e863732 100644
> --- a/c/src/lib/libbsp/arm/raspberrypi/include/vc.h
> +++ b/c/src/lib/libbsp/arm/raspberrypi/include/vc.h
> @@ -144,6 +144,14 @@ typedef struct {
>
>  int bcm2835_mailbox_get_board_serial(
>    bcm2835_get_board_serial_entries *_entries );
> +
> +typedef struct {
> +  uint32_t clock_id;
> +  uint32_t clock_rate;
> +} bcm2835_get_clock_rate_entries;
> +
> +int bcm2835_mailbox_get_clock_rate(
> +  bcm2835_get_clock_rate_entries *_entries );
>  /** @} */
>
>  #endif /* LIBBSP_ARM_RASPBERRYPI_VC_H */
> diff --git a/c/src/lib/libbsp/arm/raspberrypi/misc/vc.c
> b/c/src/lib/libbsp/arm/raspberrypi/misc/vc.c
> index c089b36..df92649 100644
> --- a/c/src/lib/libbsp/arm/raspberrypi/misc/vc.c
> +++ b/c/src/lib/libbsp/arm/raspberrypi/misc/vc.c
> @@ -447,3 +447,29 @@ int bcm2835_mailbox_get_board_serial(
>
>    return 0;
>  }
> +
> +int bcm2835_mailbox_get_clock_rate(
> +  bcm2835_get_clock_rate_entries *_entries )
> +{
> +  struct {
> +    bcm2835_mbox_buf_hdr hdr;
> +    bcm2835_mbox_tag_get_clock_rate get_clock_rate;
> +    uint32_t end_tag;
> +  } buffer BCM2835_MBOX_BUF_ALIGN_ATTRIBUTE;
> +  BCM2835_MBOX_INIT_BUF( &buffer );
> +  BCM2835_MBOX_INIT_TAG_NO_REQ( &buffer.get_clock_rate,
> +    BCM2835_MAILBOX_TAG_GET_CLOCK_RATE );
> +  buffer.get_clock_rate.body.req.clock_id = _entries->clock_id;
> +  bcm2835_mailbox_buffer_flush_and_invalidate( &buffer, sizeof( &buffer
> ) );
> +
> +  if ( bcm2835_mailbox_send_read_buffer( &buffer ) )
> +    return -1;
> +
> +  _entries->clock_id = buffer.get_clock_rate.body.resp.clock_id;
> +  _entries->clock_rate = buffer.get_clock_rate.body.resp.clock_rate;
> +
> +  if ( !bcm2835_mailbox_buffer_suceeded( &buffer.hdr ) )
> +    return -2;
> +
> +  return 0;
> +}
> diff --git a/c/src/lib/libbsp/arm/raspberrypi/misc/vc_defines.h
> b/c/src/lib/libbsp/arm/raspberrypi/misc/vc_defines.h
> index e1a5a5b..48d1658 100644
> --- a/c/src/lib/libbsp/arm/raspberrypi/misc/vc_defines.h
> +++ b/c/src/lib/libbsp/arm/raspberrypi/misc/vc_defines.h
> @@ -217,6 +217,18 @@ typedef struct {
>  } bcm2835_mbox_tag_get_vc_memory;
>
>  #define BCM2835_MAILBOX_TAG_GET_CLOCKS          0x00010007
> +typedef struct {
> +  bcm2835_mbox_tag_hdr tag_hdr;
> +  union {
> +    struct {
> +      uint32_t clock_id;
> +    } req;
> +    struct {
> +      uint32_t clock_id;
> +      uint32_t clock_rate;
> +    } resp;
> +  } body;
> +} bcm2835_mbox_tag_get_clock_rate;
>
>  /* Config */
>  #define BCM2835_MAILBOX_TAG_GET_CMD_LINE        0x00050001
> --
> 1.9.1
>
>
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