command line gpio support

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

3 files changed, 131 insertions, 0 deletions

diff --git a/commands/Kconfig b/commands/Kconfig
index 3b11c34279..28896cb937 100644
--- a/commands/Kconfig
+++ b/commands/Kconfig
@@ -284,4 +284,12 @@ config CMD_BMP
 	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 066baf02bf..a08837e282 100644
--- a/commands/Makefile
+++ b/commands/Makefile
@@ -46,3 +46,4 @@ obj-$(CONFIG_CMD_LSMOD)		+= lsmod.o
 obj-$(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 0000000000..ec6b28813e
--- /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 <common.h>
+#include <command.h>
+#include <errno.h>
+#include <gpio.h>
+
+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 <gpio>\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 <gpio> <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 <gpio>\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 <gpio> <value>\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
+