[U-Boot] [PATCH v1 1/1] fastboot: Update getvar command to get 'userdata' partition size

[Boris Brezillon <boris.brezillon@free-electrons.com>]

Hi Rob,

On Fri, 20 Feb 2015 08:54:56 -0600
Rob Herring <rob.herring@linaro.org> wrote:

> On Wed, Feb 18, 2015 at 1:52 PM, Dileep Katta <dileep.katta@linaro.org> wrote:
> > This patch adds functionality to getvar command to get the userdata partition
> > size.
> 
> This is non-standard and doesn't scale to other partitions. There is
> already a standard var "partition-size:<part name>". There is also
> "partition-type:<part name>" which probably needs to be supported as
> well. It would probably be good to have generic code to retrieve
> fastboot variables from a u-boot environment variables. Something like
> this:
> 
>     fastboot: allow retrieving fastboot variables from env
> 
>     Signed-off-by: Rob Herring <robh@kernel.org>
> 
> diff --git a/drivers/usb/gadget/f_fastboot.c b/drivers/usb/gadget/f_fastboot.c
> index 310175a..31e1063 100644
> --- a/drivers/usb/gadget/f_fastboot.c
> +++ b/drivers/usb/gadget/f_fastboot.c
> @@ -364,8 +364,15 @@ static void cb_getvar(struct usb_ep *ep, struct
> usb_request *req)
>                 else
>                         strcpy(response, "FAILValue not set");
>         } else {
> -               error("unknown variable: %s\n", cmd);
> -               strcpy(response, "FAILVariable not implemented");
> +               char envstr[32];
> +               snprintf(envstr, sizeof(envstr) - 1, "fastboot.%s", cmd);
> +               s = getenv(envstr);
> +               if (s) {
> +                       strncat(response, s, chars_left);
> +               } else {
> +                       error("unknown variable: %s\n", cmd);
> +                       strcpy(response, "FAILVariable not implemented");
> +               }
>         }
>         fastboot_tx_write_str(response);
>  }
> 

I need this feature to expose some uboot variable through 'fastboot
getvar', would you mind if I resend this patch for you?

Best Regards,

Boris

-- 
Boris Brezillon, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com