[PATCH RESEND v2 1/2] cmd: bind: Try to improve the (un)bind help

[Miquel Raynal]

While it may sound totally obvious for the regular U-Boot developer to
get the parameters of the bind/unbind commands from the output of 'dm
tree', it did not felt straightforward to me until I was explicitly
told to look there. And even when I knew the command, I did not make a
direct link between the arguments of this command and the columns
returned by 'dm tree'.

Several of us lost a lot of time because of that, I would like to kindly
help other users by slightly improving this textual line. Unfortunately,
because of how this string is used (like within the 'help' command) I
cannot detail much more, but at least the pointer is there.

Signed-off-by: Miquel Raynal <miquel.raynal at bootlin.com>
---
Resend: no change.

Changes in v2:
* Moved the details in the long text section as suggested by Heinrich.
* Rephrased the help text as well, not fully following Heinrich
  suggestion, but taking inspiration from it.
---
 cmd/bind.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/cmd/bind.c b/cmd/bind.c
index 4d1b7885e60..be0d4d2a711 100644
--- a/cmd/bind.c
+++ b/cmd/bind.c
@@ -246,6 +246,8 @@ U_BOOT_CMD(
 	"Bind a device to a driver",
 	"<node path> <driver>\n"
 	"bind <class> <index> <driver>\n"
+	"Use 'dm tree' to list all devices registered in the driver model,\n"
+	"their path, class, index and current driver.\n"
 );
 
 U_BOOT_CMD(
@@ -254,4 +256,6 @@ U_BOOT_CMD(
 	"<node path>\n"
 	"unbind <class> <index>\n"
 	"unbind <class> <index> <driver>\n"
+	"Use 'dm tree' to list all devices registered in the driver model,\n"
+	"their path, class, index and current driver.\n"
 );
-- 
2.34.1