Initial import

1 files changed, 199 insertions, 0 deletions

diff --git a/drivers/pinctrl/core.h b/drivers/pinctrl/core.h
new file mode 100644
index 000000000..b24ea846c
--- /dev/null
+++ b/drivers/pinctrl/core.h
@@ -0,0 +1,199 @@
+/*
+ * Core private header for the pin control subsystem
+ *
+ * Copyright (C) 2011 ST-Ericsson SA
+ * Written on behalf of Linaro for ST-Ericsson
+ *
+ * Author: Linus Walleij <linus.walleij@linaro.org>
+ *
+ * License terms: GNU General Public License (GPL) version 2
+ */
+
+#include <linux/kref.h>
+#include <linux/mutex.h>
+#include <linux/radix-tree.h>
+#include <linux/pinctrl/pinconf.h>
+#include <linux/pinctrl/machine.h>
+
+struct pinctrl_gpio_range;
+
+/**
+ * struct pinctrl_dev - pin control class device
+ * @node: node to include this pin controller in the global pin controller list
+ * @desc: the pin controller descriptor supplied when initializing this pin
+ *	controller
+ * @pin_desc_tree: each pin descriptor for this pin controller is stored in
+ *	this radix tree
+ * @gpio_ranges: a list of GPIO ranges that is handled by this pin controller,
+ *	ranges are added to this list at runtime
+ * @dev: the device entry for this pin controller
+ * @owner: module providing the pin controller, used for refcounting
+ * @driver_data: driver data for drivers registering to the pin controller
+ *	subsystem
+ * @p: result of pinctrl_get() for this device
+ * @hog_default: default state for pins hogged by this device
+ * @hog_sleep: sleep state for pins hogged by this device
+ * @mutex: mutex taken on each pin controller specific action
+ * @device_root: debugfs root for this device
+ */
+struct pinctrl_dev {
+	struct list_head node;
+	struct pinctrl_desc *desc;
+	struct radix_tree_root pin_desc_tree;
+	struct list_head gpio_ranges;
+	struct device *dev;
+	struct module *owner;
+	void *driver_data;
+	struct pinctrl *p;
+	struct pinctrl_state *hog_default;
+	struct pinctrl_state *hog_sleep;
+	struct mutex mutex;
+#ifdef CONFIG_DEBUG_FS
+	struct dentry *device_root;
+#endif
+};
+
+/**
+ * struct pinctrl - per-device pin control state holder
+ * @node: global list node
+ * @dev: the device using this pin control handle
+ * @states: a list of states for this device
+ * @state: the current state
+ * @dt_maps: the mapping table chunks dynamically parsed from device tree for
+ *	this device, if any
+ * @users: reference count
+ */
+struct pinctrl {
+	struct list_head node;
+	struct device *dev;
+	struct list_head states;
+	struct pinctrl_state *state;
+	struct list_head dt_maps;
+	struct kref users;
+};
+
+/**
+ * struct pinctrl_state - a pinctrl state for a device
+ * @node: list node for struct pinctrl's @states field
+ * @name: the name of this state
+ * @settings: a list of settings for this state
+ */
+struct pinctrl_state {
+	struct list_head node;
+	const char *name;
+	struct list_head settings;
+};
+
+/**
+ * struct pinctrl_setting_mux - setting data for MAP_TYPE_MUX_GROUP
+ * @group: the group selector to program
+ * @func: the function selector to program
+ */
+struct pinctrl_setting_mux {
+	unsigned group;
+	unsigned func;
+};
+
+/**
+ * struct pinctrl_setting_configs - setting data for MAP_TYPE_CONFIGS_*
+ * @group_or_pin: the group selector or pin ID to program
+ * @configs: a pointer to an array of config parameters/values to program into
+ *	hardware. Each individual pin controller defines the format and meaning
+ *	of config parameters.
+ * @num_configs: the number of entries in array @configs
+ */
+struct pinctrl_setting_configs {
+	unsigned group_or_pin;
+	unsigned long *configs;
+	unsigned num_configs;
+};
+
+/**
+ * struct pinctrl_setting - an individual mux or config setting
+ * @node: list node for struct pinctrl_settings's @settings field
+ * @type: the type of setting
+ * @pctldev: pin control device handling to be programmed. Not used for
+ *   PIN_MAP_TYPE_DUMMY_STATE.
+ * @dev_name: the name of the device using this state
+ * @data: Data specific to the setting type
+ */
+struct pinctrl_setting {
+	struct list_head node;
+	enum pinctrl_map_type type;
+	struct pinctrl_dev *pctldev;
+	const char *dev_name;
+	union {
+		struct pinctrl_setting_mux mux;
+		struct pinctrl_setting_configs configs;
+	} data;
+};
+
+/**
+ * struct pin_desc - pin descriptor for each physical pin in the arch
+ * @pctldev: corresponding pin control device
+ * @name: a name for the pin, e.g. the name of the pin/pad/finger on a
+ *	datasheet or such
+ * @dynamic_name: if the name of this pin was dynamically allocated
+ * @mux_usecount: If zero, the pin is not claimed, and @owner should be NULL.
+ *	If non-zero, this pin is claimed by @owner. This field is an integer
+ *	rather than a boolean, since pinctrl_get() might process multiple
+ *	mapping table entries that refer to, and hence claim, the same group
+ *	or pin, and each of these will increment the @usecount.
+ * @mux_owner: The name of device that called pinctrl_get().
+ * @mux_setting: The most recent selected mux setting for this pin, if any.
+ * @gpio_owner: If pinctrl_request_gpio() was called for this pin, this is
+ *	the name of the GPIO that "owns" this pin.
+ */
+struct pin_desc {
+	struct pinctrl_dev *pctldev;
+	const char *name;
+	bool dynamic_name;
+	/* These fields only added when supporting pinmux drivers */
+#ifdef CONFIG_PINMUX
+	unsigned mux_usecount;
+	const char *mux_owner;
+	const struct pinctrl_setting_mux *mux_setting;
+	const char *gpio_owner;
+#endif
+};
+
+/**
+ * struct pinctrl_maps - a list item containing part of the mapping table
+ * @node: mapping table list node
+ * @maps: array of mapping table entries
+ * @num_maps: the number of entries in @maps
+ */
+struct pinctrl_maps {
+	struct list_head node;
+	struct pinctrl_map const *maps;
+	unsigned num_maps;
+};
+
+struct pinctrl_dev *get_pinctrl_dev_from_devname(const char *dev_name);
+struct pinctrl_dev *get_pinctrl_dev_from_of_node(struct device_node *np);
+int pin_get_from_name(struct pinctrl_dev *pctldev, const char *name);
+const char *pin_get_name(struct pinctrl_dev *pctldev, const unsigned pin);
+int pinctrl_get_group_selector(struct pinctrl_dev *pctldev,
+			       const char *pin_group);
+
+static inline struct pin_desc *pin_desc_get(struct pinctrl_dev *pctldev,
+					    unsigned int pin)
+{
+	return radix_tree_lookup(&pctldev->pin_desc_tree, pin);
+}
+
+int pinctrl_register_map(struct pinctrl_map const *maps, unsigned num_maps,
+			 bool dup);
+void pinctrl_unregister_map(struct pinctrl_map const *map);
+
+extern int pinctrl_force_sleep(struct pinctrl_dev *pctldev);
+extern int pinctrl_force_default(struct pinctrl_dev *pctldev);
+
+extern struct mutex pinctrl_maps_mutex;
+extern struct list_head pinctrl_maps;
+
+#define for_each_maps(_maps_node_, _i_, _map_) \
+	list_for_each_entry(_maps_node_, &pinctrl_maps, node) \
+		for (_i_ = 0, _map_ = &_maps_node_->maps[_i_]; \
+			_i_ < _maps_node_->num_maps; \
+			_i_++, _map_ = &_maps_node_->maps[_i_])