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

[Heinrich Schuchardt]

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>
---
 cmd/button.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

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"
--
2.28.0