commands/gpio.c

   1 /*
   2  * This program is free software; you can redistribute it and/or
   3  * modify it under the terms of the GNU General Public License as
   4  * published by the Free Software Foundation; either version 2 of
   5  * the License, or (at your option) any later version.
   6  *
   7  * This program is distributed in the hope that it will be useful,
   8  * but WITHOUT ANY WARRANTY; without even the implied warranty of
   9  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  10  * GNU General Public License for more details.
  11  *
  12  * You should have received a copy of the GNU General Public License
  13  * along with this program; if not, write to the Free Software
  14  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  15  * MA 02111-1307 USA
  16  */
  17
  18 #include <common.h>
  19 #include <command.h>
  20 #include <errno.h>
  21 #include <gpio.h>
  22
  23 static int do_gpio_get_value(struct command *cmdtp, int argc, char *argv[])
  24 {
  25         int gpio, value;
  26
  27         if (argc < 2)
  28                 return COMMAND_ERROR_USAGE;
  29
  30         gpio = simple_strtoul(argv[1], NULL, 0);
  31
  32         value = gpio_get_value(gpio);
  33         if (value < 0)
  34                 return 1;
  35
  36         return value;
  37 }
  38
  39 static const __maybe_unused char cmd_gpio_get_value_help[] =
  40 "Usage: gpio_set_value <gpio>\n";
  41
  42 BAREBOX_CMD_START(gpio_get_value)
  43         .cmd            = do_gpio_get_value,
  44         .usage          = "return a gpio's value",
  45         BAREBOX_CMD_HELP(cmd_gpio_get_value_help)
  46 BAREBOX_CMD_END
  47
  48 static int do_gpio_set_value(struct command *cmdtp, int argc, char *argv[])
  49 {
  50         int gpio, value;
  51
  52         if (argc < 3)
  53                 return COMMAND_ERROR_USAGE;
  54
  55         gpio = simple_strtoul(argv[1], NULL, 0);
  56         value = simple_strtoul(argv[2], NULL, 0);
  57
  58         gpio_set_value(gpio, value);
  59
  60         return 0;
  61 }
  62
  63 static const __maybe_unused char cmd_gpio_set_value_help[] =
  64 "Usage: gpio_set_value <gpio> <value>\n";
  65
  66 BAREBOX_CMD_START(gpio_set_value)
  67         .cmd            = do_gpio_set_value,
  68         .usage          = "set a gpio's output value",
  69         BAREBOX_CMD_HELP(cmd_gpio_set_value_help)
  70 BAREBOX_CMD_END
  71
  72 static int do_gpio_direction_input(struct command *cmdtp, int argc, char *argv[])
  73 {
  74         int gpio, ret;
  75
  76         if (argc < 2)
  77                 return COMMAND_ERROR_USAGE;
  78
  79         gpio = simple_strtoul(argv[1], NULL, 0);
  80
  81         ret = gpio_direction_input(gpio);
  82         if (ret)
  83                 return 1;
  84
  85         return 0;
  86 }
  87
  88 static const __maybe_unused char cmd_do_gpio_direction_input_help[] =
  89 "Usage: gpio_direction_input <gpio>\n";
  90
  91 BAREBOX_CMD_START(gpio_direction_input)
  92         .cmd            = do_gpio_direction_input,
  93         .usage          = "set a gpio as output",
  94         BAREBOX_CMD_HELP(cmd_do_gpio_direction_input_help)
  95 BAREBOX_CMD_END
  96
  97 static int do_gpio_direction_output(struct command *cmdtp, int argc, char *argv[])
  98 {
  99         int gpio, value, ret;
 100
 101         if (argc < 3)
 102                 return COMMAND_ERROR_USAGE;
 103
 104         gpio = simple_strtoul(argv[1], NULL, 0);
 105         value = simple_strtoul(argv[2], NULL, 0);
 106
 107         ret = gpio_direction_output(gpio, value);
 108         if (ret)
 109                 return 1;
 110
 111         return 0;
 112 }
 113
 114 static const __maybe_unused char cmd_gpio_direction_output_help[] =
 115 "Usage: gpio_direction_output <gpio> <value>\n";
 116
 117 BAREBOX_CMD_START(gpio_direction_output)
 118         .cmd            = do_gpio_direction_output,
 119         .usage          = "set a gpio as output",
 120         BAREBOX_CMD_HELP(cmd_gpio_direction_output_help)
 121 BAREBOX_CMD_END
 122