cmd: adc: Report return value on error

Reporting the return value should always be done on error conditions,
this way the developer can start debugging issues with more knowledge
in-hand.

Signed-off-by: Samuel Dionne-Riel <samuel@dionne-riel.com>

diff --git a/cmd/adc.c b/cmd/adc.c
index 16f914a..75739bc 100644 (file)
--- a/cmd/adc.c
+++ b/cmd/adc.c
@@ -81,8 +81,8 @@ static int do_adc_single(struct cmd_tbl *cmdtp, int flag, int argc,
        ret = adc_channel_single_shot(argv[1], simple_strtol(argv[2], NULL, 0),
                                      &data);
        if (ret) {
-               printf("Error getting single shot for device %s channel %s\n",
-                      argv[1], argv[2]);
+               printf("Error getting single shot for device %s channel %s (ret=%d)\n",
+                      argv[1], argv[2], ret);
                return CMD_RET_FAILURE;
        }