[U-Boot] [PATCH 6/6] cmd: led: add command led list

[techping.chan at gmail.com <techping.chan@gmail.com>]

From: Ziping Chen <techping.chan@gmail.com>

Add command "led list" to list all led(s) can be operated.

Signed-off-by: Ziping Chen <techping.chan@gmail.com>
---
 cmd/led.c | 27 ++++++++++++++++++++++++++-
 1 file changed, 26 insertions(+), 1 deletion(-)

diff --git a/cmd/led.c b/cmd/led.c
index 3849a79..3f70666 100644
--- a/cmd/led.c
+++ b/cmd/led.c
@@ -230,6 +230,30 @@ int do_led (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 		}
 		if (error_count != 0)
 			return CMD_RET_FAILURE;
+	} else if (strcmp("list", argv[1]) == 0) {
+		int node, len;
+		match = 1;
+		node = fdt_path_offset(gd->fdt_blob, "/leds");
+		if (node < 0) {
+			printf("led: null led found\n");
+			return CMD_RET_FAILURE;
+		}
+		node = fdt_first_subnode(gd->fdt_blob, node);
+		if (node < 0) {
+			printf("led: null led found\n");
+			return CMD_RET_FAILURE;
+		}
+		printf(" led_name\n");
+		printf("----------------------------------------\n");
+		printf(" %s\n", fdt_getprop(gd->fdt_blob, node,
+					    "label", &len));
+		while (1) {
+			node = fdt_next_subnode(gd->fdt_blob, node);
+			if (node < 0)
+				break;
+			printf(" %s\n", fdt_getprop(gd->fdt_blob, node,
+						    "label", &len));
+		}
 	} else if (argc > 2) {
 		match = 1;
 		if (dm_led_set(argv[1], cmd) < 0)
@@ -287,6 +311,7 @@ U_BOOT_CMD(
 U_BOOT_CMD(
 	led, 4, 1, do_led,
 	"operate led(s)",
-	"[all|led_name] [on|off|toggle] - sets or clears led(s)"
+	"[all|led_name] [on|off|toggle] - sets or clears led(s)\n"
+	"led list - list all led(s) can be operated"
 );
 #endif
-- 
2.7.4