Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / include / linux / gpio / machine.h

diff --git a/kernel/include/linux/gpio/machine.h b/kernel/include/linux/gpio/machine.h
new file mode 100644 (file)
index 0000000..e270614
--- /dev/null
+++ b/kernel/include/linux/gpio/machine.h
@@ -0,0 +1,61 @@
+#ifndef __LINUX_GPIO_MACHINE_H
+#define __LINUX_GPIO_MACHINE_H
+
+#include <linux/types.h>
+#include <linux/list.h>
+
+enum gpio_lookup_flags {
+       GPIO_ACTIVE_HIGH = (0 << 0),
+       GPIO_ACTIVE_LOW = (1 << 0),
+       GPIO_OPEN_DRAIN = (1 << 1),
+       GPIO_OPEN_SOURCE = (1 << 2),
+};
+
+/**
+ * struct gpiod_lookup - lookup table
+ * @chip_label: name of the chip the GPIO belongs to
+ * @chip_hwnum: hardware number (i.e. relative to the chip) of the GPIO
+ * @con_id: name of the GPIO from the device's point of view
+ * @idx: index of the GPIO in case several GPIOs share the same name
+ * @flags: mask of GPIO_* values
+ *
+ * gpiod_lookup is a lookup table for associating GPIOs to specific devices and
+ * functions using platform data.
+ */
+struct gpiod_lookup {
+       const char *chip_label;
+       u16 chip_hwnum;
+       const char *con_id;
+       unsigned int idx;
+       enum gpio_lookup_flags flags;
+};
+
+struct gpiod_lookup_table {
+       struct list_head list;
+       const char *dev_id;
+       struct gpiod_lookup table[];
+};
+
+/*
+ * Simple definition of a single GPIO under a con_id
+ */
+#define GPIO_LOOKUP(_chip_label, _chip_hwnum, _con_id, _flags) \
+       GPIO_LOOKUP_IDX(_chip_label, _chip_hwnum, _con_id, 0, _flags)
+
+/*
+ * Use this macro if you need to have several GPIOs under the same con_id.
+ * Each GPIO needs to use a different index and can be accessed using
+ * gpiod_get_index()
+ */
+#define GPIO_LOOKUP_IDX(_chip_label, _chip_hwnum, _con_id, _idx, _flags)  \
+{                                                                         \
+       .chip_label = _chip_label,                                        \
+       .chip_hwnum = _chip_hwnum,                                        \
+       .con_id = _con_id,                                                \
+       .idx = _idx,                                                      \
+       .flags = _flags,                                                  \
+}
+
+void gpiod_add_lookup_table(struct gpiod_lookup_table *table);
+
+#endif /* __LINUX_GPIO_MACHINE_H */