1 files changed, 71 insertions, 0 deletions

diff --git a/drivers/pinctrl/core.h b/drivers/pinctrl/core.h
new file mode 100644
index 000000000000..472fa1341cc0
--- /dev/null
+++ b/drivers/pinctrl/core.h
@@ -0,0 +1,71 @@
+/*
+ * 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
+ */
+
+/**
+ * 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
+ * @pin_desc_tree_lock: lock for the descriptor tree
+ * @gpio_ranges: a list of GPIO ranges that is handled by this pin controller,
+ *      ranges are added to this list at runtime
+ * @gpio_ranges_lock: lock for the GPIO ranges list
+ * @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
+ * @pinmux_hogs_lock: lock for the pinmux hog list
+ * @pinmux_hogs: list of pinmux maps hogged by this device
+ */
+struct pinctrl_dev {
+        struct list_head node;
+        struct pinctrl_desc *desc;
+        struct radix_tree_root pin_desc_tree;
+        spinlock_t pin_desc_tree_lock;
+        struct list_head gpio_ranges;
+        struct mutex gpio_ranges_lock;
+        struct device dev;
+        struct module *owner;
+        void *driver_data;
+#ifdef CONFIG_PINMUX
+        struct mutex pinmux_hogs_lock;
+        struct list_head pinmux_hogs;
+#endif
+};
+
+/**
+ * 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
+ * @lock: a lock to protect the descriptor structure
+ * @mux_requested: whether the pin is already requested by pinmux or not
+ * @mux_function: a named muxing function for the pin that will be passed to
+ *      subdrivers and shown in debugfs etc
+ */
+struct pin_desc {
+        struct pinctrl_dev *pctldev;
+        const char *name;
+        spinlock_t lock;
+        /* These fields only added when supporting pinmux drivers */
+#ifdef CONFIG_PINMUX
+        const char *mux_function;
+#endif
+};
+
+struct pinctrl_dev *get_pinctrl_dev_from_dev(struct device *dev,
+                                             const char *dev_name);
+struct pin_desc *pin_desc_get(struct pinctrl_dev *pctldev, int pin);
+int pinctrl_get_device_gpio_range(unsigned gpio,
+                                  struct pinctrl_dev **outdev,
+                                  struct pinctrl_gpio_range **outrange);