[PATCH] common: Add Kconfig option for FDT mem alignment

[Simon Glass]

On Mon, 13 Apr 2020 at 02:03, Michal Simek <michal.simek at xilinx.com> wrote:
>
> From: Ashok Reddy Soma <ashok.reddy.soma at xilinx.com>
>
> FDT memory is aligned by 4KB. This is hardcoded in common/board_f.c.
> Add Kconfig option, assign default value of 0x1000 and enable option to
> change this value.
>
> Signed-off-by: Ashok Reddy Soma <ashok.reddy.soma at xilinx.com>
> Signed-off-by: Michal Simek <michal.simek at xilinx.com>
> ---
>
>  common/board_f.c | 3 ++-
>  dts/Kconfig      | 7 +++++++
>  2 files changed, 9 insertions(+), 1 deletion(-)

+Marek since he is doing a similar thing



>
> diff --git a/common/board_f.c b/common/board_f.c
> index 82a164752aa3..928874e03555 100644
> --- a/common/board_f.c
> +++ b/common/board_f.c
> @@ -546,7 +546,8 @@ static int reserve_fdt(void)
>          * will be relocated with other data.
>          */
>         if (gd->fdt_blob) {
> -               gd->fdt_size = ALIGN(fdt_totalsize(gd->fdt_blob) + 0x1000, 32);
> +               gd->fdt_size = ALIGN(fdt_totalsize(gd->fdt_blob) +
> +                                    CONFIG_FDT_MEM_ALIGN_SIZE, 32);
>
>                 gd->start_addr_sp -= gd->fdt_size;
>                 gd->new_fdt = map_sysmem(gd->start_addr_sp, gd->fdt_size);
> diff --git a/dts/Kconfig b/dts/Kconfig
> index 046a54a17366..696c0b71afaf 100644
> --- a/dts/Kconfig
> +++ b/dts/Kconfig
> @@ -121,6 +121,13 @@ config DEFAULT_DEVICE_TREE
>           It can be overridden from the command line:
>           $ make DEVICE_TREE=<device-tree-name>
>
> +config FDT_MEM_ALIGN_SIZE
> +       hex "FDT memory alignment size"
> +       default 0x1000
> +       help
> +         This option is used to set the default alignment when reserving memory
> +         for fdt.
> +
>  config OF_LIST
>         string "List of device tree files to include for DT control"
>         depends on SPL_LOAD_FIT || MULTI_DTB_FIT
> --
> 2.26.0
>