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-rw-r--r--drivers/pinctrl/core.h71
1 files changed, 71 insertions, 0 deletions
diff --git a/drivers/pinctrl/core.h b/drivers/pinctrl/core.h
new file mode 100644
index 00000000000..472fa1341cc
--- /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);