diff options
Diffstat (limited to 'cmd/gpio.c')
| -rw-r--r-- | cmd/gpio.c | 22 |
1 files changed, 17 insertions, 5 deletions
diff --git a/cmd/gpio.c b/cmd/gpio.c index eff36ab2af..67eef83c95 100644 --- a/cmd/gpio.c +++ b/cmd/gpio.c @@ -223,23 +223,35 @@ static int do_gpio(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) gpio_direction_output(gpio, value); } printf("gpio: pin %s (gpio %u) value is ", str_gpio, gpio); - if (IS_ERR_VALUE(value)) + + if (IS_ERR_VALUE(value)) { printf("unknown (ret=%d)\n", value); - else + goto err; + } else { printf("%d\n", value); + } + if (sub_cmd != GPIOC_INPUT && !IS_ERR_VALUE(value)) { int nval = gpio_get_value(gpio); - if (IS_ERR_VALUE(nval)) + if (IS_ERR_VALUE(nval)) { printf(" Warning: no access to GPIO output value\n"); - else if (nval != value) + goto err; + } else if (nval != value) { printf(" Warning: value of pin is still %d\n", nval); + goto err; + } } if (ret != -EBUSY) gpio_free(gpio); - return value; + return CMD_RET_SUCCESS; + +err: + if (ret != -EBUSY) + gpio_free(gpio); + return CMD_RET_FAILURE; } U_BOOT_CMD(gpio, 4, 0, do_gpio, |