[PATCH v4 06/12] arm: mvebu: clearfog: Add option for 2.5 Gbps SFP

[Baruch Siach]

Hi Joel,

On Mon, Jan 27 2020, Joel Johnson wrote:
> While newer Linux kernels provide autoconfiguration of SFP, provide
> an option for setting in U-Boot Kconfig for use prior to booting.
>
> Signed-off-by: Joel Johnson <mrjoel at lixil.net>
>
> ---
>
> v2 changes:
>   - fixed help indentation
> v3 changes:
>   - none
> v4 changes:
>   - adjust static SerDes configuration at runtime instead of #ifdef
>
> ---
>  board/solidrun/clearfog/Kconfig    | 7 +++++++
>  board/solidrun/clearfog/clearfog.c | 3 +++
>  2 files changed, 10 insertions(+)
>
> diff --git a/board/solidrun/clearfog/Kconfig b/board/solidrun/clearfog/Kconfig
> index 936d5918f8..c910e17093 100644
> --- a/board/solidrun/clearfog/Kconfig
> +++ b/board/solidrun/clearfog/Kconfig
> @@ -15,4 +15,11 @@ config TARGET_CLEARFOG_BASE
>  	  detection via additional EEPROM hardware. This option enables selecting
>  	  the Base variant for older hardware revisions.
>
> +config CLEARFOG_SFP_25GB
> +	bool "Enable 2.5 Gbps mode for SFP"
> +	help
> +	  Set the SFP module connection to support 2.5 Gbps transfer speed for the
> +	  SGMII connection (requires a supporting SFP). By default, transfer speed
> +	  of 1.25 Gbps is used, suitable for a more common 1 Gbps SFP module.
> +
>  endmenu
> diff --git a/board/solidrun/clearfog/clearfog.c b/board/solidrun/clearfog/clearfog.c
> index 4019e37016..6c5b9a784f 100644
> --- a/board/solidrun/clearfog/clearfog.c
> +++ b/board/solidrun/clearfog/clearfog.c
> @@ -59,6 +59,9 @@ void config_static_serdes_map(void)
>  		board_serdes_map[4].serdes_speed = SERDES_SPEED_5_GBPS;
>  		board_serdes_map[4].serdes_mode = SERDES_DEFAULT_MODE;
>  	}
> +
> +	if (IS_ENABLED(CONFIG_CLEARFOG_SFP_25GB))
> +		board_serdes_map[5].serdes_speed = SERDES_SPEED_3_125_GBPS;

config_static_serdes_map() is not called only when TLV EEPROM is
present. So CONFIG_CLEARFOG_SFP_25GB has no effect in that case. This
code should move to hws_board_topology_load() to avoid that.

baruch

>  }
>
>  int hws_board_topology_load(struct serdes_map **serdes_map_array, u8 *count)


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