[PATCH 1/1] cmd/button: return button status

[Tom Rini]

On Wed, Sep 02, 2020 at 10:08:26PM +0200, Heinrich Schuchardt wrote:

> To make the button command useful in a shell script it should return the
> status of the button:
> 
> * 0 (true) - pressed, on
> * 1 (false) - not pressed, off
> 
> The button command takes only one argument. Correct maxargs.
> 
> Signed-off-by: Heinrich Schuchardt <xypron.glpk at gmx.de>
> Reviewed-by: Philippe Reynes <philippe.reynes at softathome.com>
> ---
>  cmd/button.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> --
> 2.28.0
> 
> diff --git a/cmd/button.c b/cmd/button.c
> index 84ad1653c7..64c5a8fa04 100644
> --- a/cmd/button.c
> +++ b/cmd/button.c
> @@ -75,11 +75,11 @@ int do_button(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
> 
>  	ret = show_button_state(dev);
> 
> -	return 0;
> +	return !ret;
>  }
> 
>  U_BOOT_CMD(
> -	button, 4, 1, do_button,
> +	button, 2, 1, do_button,
>  	"manage buttons",
>  	"<button_label> \tGet button state\n"
>  	"button list\t\tShow a list of buttons"

This in turn breaks the current button test, which I believe needs to be
updated to match.  Thanks.

-- 
Tom
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