[Buildroot] [PATCH v2] uboot: support -r option for mkenvimage
Thomas Petazzoni
thomas.petazzoni at free-electrons.com
Sat Oct 12 10:23:13 UTC 2013
Simon,
On Sat, 12 Oct 2013 11:05:39 +0100, spdawson at gmail.com wrote:
> From: Simon Dawson <spdawson at gmail.com>
>
> Some boards are configured in u-boot to store multiple redundant copies of
> the environment image in flash. For these boards, it is required to pass the -r
> flag, when generating a boot environment image using mkenvimage.
>
> Signed-off-by: Simon Dawson <spdawson at gmail.com>
> ---
> v2: Change configuration menu text and help text, in response to feedback
> from Arnout Vandecappelle and Thomas Petazzoni
>
> boot/uboot/Config.in | 8 ++++++++
> boot/uboot/uboot.mk | 1 +
> 2 files changed, 9 insertions(+)
>
> diff --git a/boot/uboot/Config.in b/boot/uboot/Config.in
> index 998cda2..b750c77 100644
> --- a/boot/uboot/Config.in
> +++ b/boot/uboot/Config.in
> @@ -242,6 +242,14 @@ config BR2_TARGET_UBOOT_ENVIMAGE_SIZE
> Size of envronment, can be prefixed with 0x for hexadecimal
> values.
>
> +config BR2_TARGET_UBOOT_ENVIMAGE_REDUNDANT
> + bool "Environment has two copies"
> + help
> + There are two copies of the environment in flash.
> +
> + Check your u-boot configuration for the CONFIG_ENV_ADDR_REDUND and
> + CONFIG_ENV_SIZE_REDUND settings.
I'm sorry but I'm still unhappy with the help text, especially since
your commit log is in fact better :-)
Some platforms define in their U-Boot configuration that the
U-Boot environment should be duplicated in two locations (for
extra safety). Check your U-Boot configuration for the
CONFIG_ENV_ADDR_REDUND and CONFIG_ENV_SIZE_REDUND settings to
see if it is the case for your platform.
If it is the case, then you should enable this option to
ensure that the U-Boot environment image generated by
Buildroot is compatible with this "redundant environment"
mechanism of U-Boot.
Or something along those lines (don't hesitate to fix the broken
english if needed).
Best regards,
Thomas
--
Thomas Petazzoni, CTO, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com
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