Initial import

1 files changed, 190 insertions, 0 deletions

diff --git a/include/linux/pinctrl/pinctrl.h b/include/linux/pinctrl/pinctrl.h
new file mode 100644
index 000000000..66e469751
--- /dev/null
+++ b/include/linux/pinctrl/pinctrl.h
@@ -0,0 +1,190 @@
+/*
+ * Interface the pinctrl subsystem
+ *
+ * Copyright (C) 2011 ST-Ericsson SA
+ * Written on behalf of Linaro for ST-Ericsson
+ * This interface is used in the core to keep track of pins.
+ *
+ * Author: Linus Walleij <linus.walleij@linaro.org>
+ *
+ * License terms: GNU General Public License (GPL) version 2
+ */
+#ifndef __LINUX_PINCTRL_PINCTRL_H
+#define __LINUX_PINCTRL_PINCTRL_H
+
+#ifdef CONFIG_PINCTRL
+
+#include <linux/radix-tree.h>
+#include <linux/list.h>
+#include <linux/seq_file.h>
+#include <linux/pinctrl/pinctrl-state.h>
+
+struct device;
+struct pinctrl_dev;
+struct pinctrl_map;
+struct pinmux_ops;
+struct pinconf_ops;
+struct pin_config_item;
+struct gpio_chip;
+struct device_node;
+
+/**
+ * struct pinctrl_pin_desc - boards/machines provide information on their
+ * pins, pads or other muxable units in this struct
+ * @number: unique pin number from the global pin number space
+ * @name: a name for this pin
+ * @drv_data: driver-defined per-pin data. pinctrl core does not touch this
+ */
+struct pinctrl_pin_desc {
+	unsigned number;
+	const char *name;
+	void *drv_data;
+};
+
+/* Convenience macro to define a single named or anonymous pin descriptor */
+#define PINCTRL_PIN(a, b) { .number = a, .name = b }
+#define PINCTRL_PIN_ANON(a) { .number = a }
+
+/**
+ * struct pinctrl_gpio_range - each pin controller can provide subranges of
+ * the GPIO number space to be handled by the controller
+ * @node: list node for internal use
+ * @name: a name for the chip in this range
+ * @id: an ID number for the chip in this range
+ * @base: base offset of the GPIO range
+ * @pin_base: base pin number of the GPIO range if pins == NULL
+ * @pins: enumeration of pins in GPIO range or NULL
+ * @npins: number of pins in the GPIO range, including the base number
+ * @gc: an optional pointer to a gpio_chip
+ */
+struct pinctrl_gpio_range {
+	struct list_head node;
+	const char *name;
+	unsigned int id;
+	unsigned int base;
+	unsigned int pin_base;
+	unsigned const *pins;
+	unsigned int npins;
+	struct gpio_chip *gc;
+};
+
+/**
+ * struct pinctrl_ops - global pin control operations, to be implemented by
+ * pin controller drivers.
+ * @get_groups_count: Returns the count of total number of groups registered.
+ * @get_group_name: return the group name of the pin group
+ * @get_group_pins: return an array of pins corresponding to a certain
+ *	group selector @pins, and the size of the array in @num_pins
+ * @pin_dbg_show: optional debugfs display hook that will provide per-device
+ *	info for a certain pin in debugfs
+ * @dt_node_to_map: parse a device tree "pin configuration node", and create
+ *	mapping table entries for it. These are returned through the @map and
+ *	@num_maps output parameters. This function is optional, and may be
+ *	omitted for pinctrl drivers that do not support device tree.
+ * @dt_free_map: free mapping table entries created via @dt_node_to_map. The
+ *	top-level @map pointer must be freed, along with any dynamically
+ *	allocated members of the mapping table entries themselves. This
+ *	function is optional, and may be omitted for pinctrl drivers that do
+ *	not support device tree.
+ */
+struct pinctrl_ops {
+	int (*get_groups_count) (struct pinctrl_dev *pctldev);
+	const char *(*get_group_name) (struct pinctrl_dev *pctldev,
+				       unsigned selector);
+	int (*get_group_pins) (struct pinctrl_dev *pctldev,
+			       unsigned selector,
+			       const unsigned **pins,
+			       unsigned *num_pins);
+	void (*pin_dbg_show) (struct pinctrl_dev *pctldev, struct seq_file *s,
+			  unsigned offset);
+	int (*dt_node_to_map) (struct pinctrl_dev *pctldev,
+			       struct device_node *np_config,
+			       struct pinctrl_map **map, unsigned *num_maps);
+	void (*dt_free_map) (struct pinctrl_dev *pctldev,
+			     struct pinctrl_map *map, unsigned num_maps);
+};
+
+/**
+ * struct pinctrl_desc - pin controller descriptor, register this to pin
+ * control subsystem
+ * @name: name for the pin controller
+ * @pins: an array of pin descriptors describing all the pins handled by
+ *	this pin controller
+ * @npins: number of descriptors in the array, usually just ARRAY_SIZE()
+ *	of the pins field above
+ * @pctlops: pin control operation vtable, to support global concepts like
+ *	grouping of pins, this is optional.
+ * @pmxops: pinmux operations vtable, if you support pinmuxing in your driver
+ * @confops: pin config operations vtable, if you support pin configuration in
+ *	your driver
+ * @owner: module providing the pin controller, used for refcounting
+ * @num_custom_params: Number of driver-specific custom parameters to be parsed
+ *	from the hardware description
+ * @custom_params: List of driver_specific custom parameters to be parsed from
+ *	the hardware description
+ * @custom_conf_items: Information how to print @params in debugfs, must be
+ *	the same size as the @custom_params, i.e. @num_custom_params
+ */
+struct pinctrl_desc {
+	const char *name;
+	struct pinctrl_pin_desc const *pins;
+	unsigned int npins;
+	const struct pinctrl_ops *pctlops;
+	const struct pinmux_ops *pmxops;
+	const struct pinconf_ops *confops;
+	struct module *owner;
+#ifdef CONFIG_GENERIC_PINCONF
+	unsigned int num_custom_params;
+	const struct pinconf_generic_params *custom_params;
+	const struct pin_config_item *custom_conf_items;
+#endif
+};
+
+/* External interface to pin controller */
+extern struct pinctrl_dev *pinctrl_register(struct pinctrl_desc *pctldesc,
+				struct device *dev, void *driver_data);
+extern void pinctrl_unregister(struct pinctrl_dev *pctldev);
+extern bool pin_is_valid(struct pinctrl_dev *pctldev, int pin);
+extern void pinctrl_add_gpio_range(struct pinctrl_dev *pctldev,
+				struct pinctrl_gpio_range *range);
+extern void pinctrl_add_gpio_ranges(struct pinctrl_dev *pctldev,
+				struct pinctrl_gpio_range *ranges,
+				unsigned nranges);
+extern void pinctrl_remove_gpio_range(struct pinctrl_dev *pctldev,
+				struct pinctrl_gpio_range *range);
+
+extern struct pinctrl_dev *pinctrl_find_and_add_gpio_range(const char *devname,
+		struct pinctrl_gpio_range *range);
+extern struct pinctrl_gpio_range *
+pinctrl_find_gpio_range_from_pin(struct pinctrl_dev *pctldev,
+				 unsigned int pin);
+extern int pinctrl_get_group_pins(struct pinctrl_dev *pctldev,
+				const char *pin_group, const unsigned **pins,
+				unsigned *num_pins);
+
+#ifdef CONFIG_OF
+extern struct pinctrl_dev *of_pinctrl_get(struct device_node *np);
+#else
+static inline
+struct pinctrl_dev *of_pinctrl_get(struct device_node *np)
+{
+	return NULL;
+}
+#endif /* CONFIG_OF */
+
+extern const char *pinctrl_dev_get_name(struct pinctrl_dev *pctldev);
+extern const char *pinctrl_dev_get_devname(struct pinctrl_dev *pctldev);
+extern void *pinctrl_dev_get_drvdata(struct pinctrl_dev *pctldev);
+#else
+
+struct pinctrl_dev;
+
+/* Sufficiently stupid default functions when pinctrl is not in use */
+static inline bool pin_is_valid(struct pinctrl_dev *pctldev, int pin)
+{
+	return pin >= 0;
+}
+
+#endif /* !CONFIG_PINCTRL */
+
+#endif /* __LINUX_PINCTRL_PINCTRL_H */