summaryrefslogtreecommitdiff
path: root/drivers/gpio/gpiolib.h
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/gpio/gpiolib.h')
-rw-r--r--drivers/gpio/gpiolib.h46
1 files changed, 46 insertions, 0 deletions
diff --git a/drivers/gpio/gpiolib.h b/drivers/gpio/gpiolib.h
new file mode 100644
index 000000000000..82be586c1f90
--- /dev/null
+++ b/drivers/gpio/gpiolib.h
@@ -0,0 +1,46 @@
+/*
+ * Internal GPIO functions.
+ *
+ * Copyright (C) 2013, Intel Corporation
+ * Author: Mika Westerberg <mika.westerberg@linux.intel.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef GPIOLIB_H
+#define GPIOLIB_H
+
+#include <linux/err.h>
+#include <linux/device.h>
+
+/**
+ * struct acpi_gpio_info - ACPI GPIO specific information
+ * @gpioint: if %true this GPIO is of type GpioInt otherwise type is GpioIo
+ * @active_low: in case of @gpioint, the pin is active low
+ */
+struct acpi_gpio_info {
+ bool gpioint;
+ bool active_low;
+};
+
+#ifdef CONFIG_ACPI
+void acpi_gpiochip_add(struct gpio_chip *chip);
+void acpi_gpiochip_remove(struct gpio_chip *chip);
+
+struct gpio_desc *acpi_get_gpiod_by_index(struct device *dev, int index,
+ struct acpi_gpio_info *info);
+#else
+static inline void acpi_gpiochip_add(struct gpio_chip *chip) { }
+static inline void acpi_gpiochip_remove(struct gpio_chip *chip) { }
+
+static inline struct gpio_desc *
+acpi_get_gpiod_by_index(struct device *dev, int index,
+ struct acpi_gpio_info *info)
+{
+ return ERR_PTR(-ENOSYS);
+}
+#endif
+
+#endif /* GPIOLIB_H */