[U-Boot] [PATCH V2] imx: Define common routines to set cpu and board environment variables

[Marek Vasut <marex@denx.de>]

Dear Eric Nelson,

+Albert, Tom

> These can be used in bootcmd to produce DTB file names.
> 
> set_board_env() allows over-ride for use when a developing custom
> DTB files.
> 
> Signed-off-by: Eric Nelson <eric.nelson@boundarydevices.com>
> ---
> V2 adds void to the function declarations and definitions and adds
> a blank to keep checkpatch clean.
> 
> I'm feeling like I missed something here. Routines in imx-common/cpu.c
> are shared between various i.MX processors, but there doesn't appear
> to be a common header file.
> 
> It seems that arch/arm/include/asm/imx-common.h should be present
> but isn't. Am I missing something?
> 
> I also think there should be a way we could pull this into multiple
> boards without adding a full-up board_late_init() function into
> each board file, but tracing the init sequence, I'm not seeing an
> architecture-specific spot after env_init.
> 
>  arch/arm/imx-common/cpu.c                 | 15 +++++++++++++--
>  arch/arm/include/asm/arch-mx6/sys_proto.h |  9 +++++++++
>  2 files changed, 22 insertions(+), 2 deletions(-)
> 
> diff --git a/arch/arm/imx-common/cpu.c b/arch/arm/imx-common/cpu.c
> index 0cd2538..4214946 100644
> --- a/arch/arm/imx-common/cpu.c
> +++ b/arch/arm/imx-common/cpu.c
> @@ -99,8 +99,6 @@ unsigned imx_ddr_size(void)
>  }
>  #endif
> 
> -#if defined(CONFIG_DISPLAY_CPUINFO)
> -
>  const char *get_imx_type(u32 imxtype)
>  {
>  	switch (imxtype) {
> @@ -121,6 +119,19 @@ const char *get_imx_type(u32 imxtype)
>  	}
>  }
> 
> +void __weak set_cpu_env(void)
> +{
> +	setenv("cpu", get_imx_type(cpu_type(get_cpu_rev())));
> +}

I'd say we should have a U-Boot wide thing here + CPU-specific overrides where 
applicable.

> +void __weak set_board_env(void)
> +{
> +	char *old = getenv("board");
> +	if (!old)
> +		setenv("board", CONFIG_SYS_BOARD);
> +}

This might go into arch/FOO/lib/board.c ?
[...]