baylibre-acme: Add Linux-specific GPIO helpers.

[libsigrok.git] / src / hardware / baylibre-acme / gpio.h

diff --git a/src/hardware/baylibre-acme/gpio.h b/src/hardware/baylibre-acme/gpio.h
new file mode 100644 (file)
index 0000000..8a6fde1
--- /dev/null
+++ b/src/hardware/baylibre-acme/gpio.h
@@ -0,0 +1,41 @@
+/*
+ * This file is part of the libsigrok project.
+ *
+ * Copyright (C) 2015 Bartosz Golaszewski <bgolaszewski@baylibre.com>
+ *
+ * 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 3 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, see <http://www.gnu.org/licenses/>.
+ */
+
+/*
+ * Linux-specific GPIO interface helpers. These functions could be moved out
+ * of this directory if any other driver would happen to want to use them.
+ */
+
+#ifndef LIBSIGROK_GPIO_H
+#define LIBSIGROK_GPIO_H
+
+enum {
+       GPIO_DIR_IN,
+       GPIO_DIR_OUT,
+};
+
+SR_PRIV int sr_gpio_export(unsigned gpio);
+SR_PRIV int sr_gpio_set_direction(unsigned gpio, unsigned direction);
+SR_PRIV int sr_gpio_set_value(unsigned gpio, unsigned value);
+SR_PRIV int sr_gpio_get_value(int gpio);
+/* These functions export given gpio if it's not already exported. */
+SR_PRIV int sr_gpio_setval_export(int gpio, int value);
+SR_PRIV int sr_gpio_getval_export(int gpio);
+
+#endif /* LIBSIGROK_GPIO_H */