diff --git a/commands/Kconfig b/commands/Kconfig index 3b11c34..28896cb 100644 --- a/commands/Kconfig +++ b/commands/Kconfig @@ -284,4 +284,12 @@ help show bmp files on framebuffer devices +config CMD_GPIO + bool + depends on GENERIC_GPIO + prompt "gpio commands" + help + include gpio_set_value, gpio_get_value, gpio_direction_input and + gpio_direction_output commands to control gpios. + endmenu diff --git a/commands/Makefile b/commands/Makefile index 066baf0..a08837e 100644 --- a/commands/Makefile +++ b/commands/Makefile @@ -46,3 +46,4 @@ obj-$(CONFIG_CMD_INSMOD) += insmod.o obj-$(CONFIG_CMD_BMP) += bmp.o obj-$(CONFIG_USB_GADGET_DFU) += dfu.o +obj-$(CONFIG_CMD_GPIO) += gpio.o diff --git a/commands/gpio.c b/commands/gpio.c new file mode 100644 index 0000000..ec6b288 --- /dev/null +++ b/commands/gpio.c @@ -0,0 +1,122 @@ +/* + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#include +#include +#include +#include + +static int do_gpio_get_value(cmd_tbl_t *cmdtp, int argc, char *argv[]) +{ + int gpio, value; + + if (argc < 2) + return COMMAND_ERROR_USAGE; + + gpio = simple_strtoul(argv[1], NULL, 0); + + value = gpio_get_value(gpio); + if (value < 0) + return 1; + + return value; +} + +static const __maybe_unused char cmd_gpio_get_value_help[] = +"Usage: gpio_set_value \n"; + +U_BOOT_CMD_START(gpio_get_value) + .cmd = do_gpio_get_value, + .usage = "return a gpio's value", + U_BOOT_CMD_HELP(cmd_gpio_get_value_help) +U_BOOT_CMD_END + +static int do_gpio_set_value(cmd_tbl_t *cmdtp, int argc, char *argv[]) +{ + int gpio, value; + + if (argc < 3) + return COMMAND_ERROR_USAGE; + + gpio = simple_strtoul(argv[1], NULL, 0); + value = simple_strtoul(argv[2], NULL, 0); + + gpio_set_value(gpio, value); + + return 0; +} + +static const __maybe_unused char cmd_gpio_set_value_help[] = +"Usage: gpio_set_value \n"; + +U_BOOT_CMD_START(gpio_set_value) + .cmd = do_gpio_set_value, + .usage = "set a gpio's output value", + U_BOOT_CMD_HELP(cmd_gpio_set_value_help) +U_BOOT_CMD_END + +static int do_gpio_direction_input(cmd_tbl_t *cmdtp, int argc, char *argv[]) +{ + int gpio, ret; + + if (argc < 2) + return COMMAND_ERROR_USAGE; + + gpio = simple_strtoul(argv[1], NULL, 0); + + ret = gpio_direction_input(gpio); + if (ret) + return 1; + + return 0; +} + +static const __maybe_unused char cmd_do_gpio_direction_input_help[] = +"Usage: gpio_direction_input \n"; + +U_BOOT_CMD_START(gpio_direction_input) + .cmd = do_gpio_direction_input, + .usage = "set a gpio as output", + U_BOOT_CMD_HELP(cmd_do_gpio_direction_input_help) +U_BOOT_CMD_END + +static int do_gpio_direction_output(cmd_tbl_t *cmdtp, int argc, char *argv[]) +{ + int gpio, value, ret; + + if (argc < 3) + return COMMAND_ERROR_USAGE; + + gpio = simple_strtoul(argv[1], NULL, 0); + value = simple_strtoul(argv[2], NULL, 0); + + ret = gpio_direction_output(gpio, value); + if (ret) + return 1; + + return 0; +} + +static const __maybe_unused char cmd_gpio_direction_output_help[] = +"Usage: gpio_direction_output \n"; + +U_BOOT_CMD_START(gpio_direction_output) + .cmd = do_gpio_direction_output, + .usage = "set a gpio as output", + U_BOOT_CMD_HELP(cmd_gpio_direction_output_help) +U_BOOT_CMD_END +