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Blackfin: cmd_gpio: document/extend input sub-option

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The input sub command was missing from the help text, and it didn't show
the actual value currently read on the GPIO.  This allows people to read
the value of input pins.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
This commit is contained in:
Mike Frysinger 2010-08-13 15:48:09 -04:00
parent 821ad16fa9
commit 1729615875
1 changed files with 13 additions and 14 deletions
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27
arch/blackfin/cpu/cmd_gpio.c
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@ -90,20 +90,19 @@ int do_gpio(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
gpio_request(gpio, "cmd_gpio");
/* finally, let's do it: set direction and exec command */
ulong value;
if (sub_cmd == GPIO_INPUT) {
gpio_direction_input(gpio);
printf("gpio: pin %lu on port %c set to input\n", pin, *str_pin);
return 0;
value = gpio_get_value(gpio);
} else {
switch (sub_cmd) {
case GPIO_SET: value = 1; break;
case GPIO_CLEAR: value = 0; break;
case GPIO_TOGGLE: value = !gpio_get_value(gpio); break;
default: goto show_usage;
}
gpio_direction_output(gpio, value);
}
ulong value;
switch (sub_cmd) {
case GPIO_SET: value = 1; break;
case GPIO_CLEAR: value = 0; break;
case GPIO_TOGGLE: value = !gpio_get_value(gpio); break;
default: goto show_usage;
}
gpio_direction_output(gpio, value);
printf("gpio: pin %lu on port %c (gpio %lu) value is %lu\n",
pin, *str_pin, gpio, value);
@ -113,6 +112,6 @@ int do_gpio(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
}
U_BOOT_CMD(gpio, 3, 0, do_gpio,
"set/clear/toggle gpio output pins",
"<set|clear|toggle> <port><pin>\n"
" - set/clear/toggle the specified pin (e.g. PF10)");
"input/set/clear/toggle gpio output pins",
"<input|set|clear|toggle> <port><pin>\n"
" - input/set/clear/toggle the specified pin (e.g. PF10)");