cmd: pinmux: update result of do_status

Update the result of do_status and always returns a CMD_RET_ value
(-ENOSYS was a possible result of show_pinmux).

This patch also adds pincontrol name in error messages (dev->name)
and treats correctly the status sub command when pin-controller device is
not selected.
Signed-off-by: NPatrick Delaunay <patrick.delaunay@foss.st.com>
Reviewed-by: NSimon Glass <sjg@chromium.org>

cmd/pinmux.c

@@ -52,20 +52,21 @@ static int show_pinmux(struct udevice *dev)
 	pins_count = pinctrl_get_pins_count(dev);
 
 	if (pins_count == -ENOSYS) {
-		printf("Ops get_pins_count not supported\n");
+		printf("Ops get_pins_count not supported by %s\n", dev->name);
 		return pins_count;
 	}
 
 	for (i = 0; i < pins_count; i++) {
 		ret = pinctrl_get_pin_name(dev, i, pin_name, PINNAME_SIZE);
-		if (ret == -ENOSYS) {
-			printf("Ops get_pin_name not supported\n");
+		if (ret) {
+			printf("Ops get_pin_name error (%d) by %s\n", ret, dev->name);
 			return ret;
 		}
 
 		ret = pinctrl_get_pin_muxing(dev, i, pin_mux, PINMUX_SIZE);
 		if (ret) {
-			printf("Ops get_pin_muxing error (%d)\n", ret);
+			printf("Ops get_pin_muxing error (%d) by %s in %s\n",
+			       ret, pin_name, dev->name);
 			return ret;
 		}
 
@@ -80,25 +81,27 @@ static int do_status(struct cmd_tbl *cmdtp, int flag, int argc,
 		     char *const argv[])
 {
 	struct udevice *dev;
-	int ret = CMD_RET_USAGE;
 
-	if (currdev && (argc < 2 || strcmp(argv[1], "-a")))
-		return show_pinmux(currdev);
+	if (argc < 2) {
+		if (!currdev) {
+			printf("pin-controller device not selected\n");
+			return CMD_RET_FAILURE;
+		}
+		show_pinmux(currdev);
+		return CMD_RET_SUCCESS;
+	}
 
-	if (argc < 2 || strcmp(argv[1], "-a"))
-		return ret;
+	if (strcmp(argv[1], "-a"))
+		return CMD_RET_USAGE;
 
 	uclass_foreach_dev_probe(UCLASS_PINCTRL, dev) {
 		/* insert a separator between each pin-controller display */
 		printf("--------------------------\n");
 		printf("%s:\n", dev->name);
-		ret = show_pinmux(dev);
-		if (ret < 0)
-			printf("Can't display pin muxing for %s\n",
-			       dev->name);
+		show_pinmux(dev);
 	}
 
-	return ret;
+	return CMD_RET_SUCCESS;
 }
 
 static int do_list(struct cmd_tbl *cmdtp, int flag, int argc,

include/dm/pinctrl.h

@@ -587,7 +587,7 @@ int pinctrl_get_pin_muxing(struct udevice *dev, int selector, char *buf,
  *
  * This allows to know the number of pins owned by a given pin-controller
  *
- * Return: Number of pins if OK, or negative error code on failure
+ * Return: Number of pins if OK, or -ENOSYS when not supported
  */
 int pinctrl_get_pins_count(struct udevice *dev);
 

test/py/tests/test_pinmux.py

@@ -13,9 +13,9 @@ def test_pinmux_usage_1(u_boot_console):
 @pytest.mark.buildconfigspec('cmd_pinmux')
 def test_pinmux_usage_2(u_boot_console):
     """Test that 'pinmux status' executed without previous "pinmux dev"
-    command displays pinmux usage."""
+    command displays error message."""
     output = u_boot_console.run_command('pinmux status')
-    assert 'Usage:' in output
+    assert 'pin-controller device not selected' in output
 
 @pytest.mark.buildconfigspec('cmd_pinmux')
 @pytest.mark.boardspec('sandbox')