Merge branch 'for-next' of git://git.linaro.org/people/triad/linux-pinctrl
* 'for-next' of git://git.linaro.org/people/triad/linux-pinctrl: pinctrl/sirf: fix sirfsoc_get_group_pins prototype pinctrl: Don't copy function name when requesting a pin pinctrl: Don't copy pin names when registering them pinctrl: Remove unsafe __refdata pinctrl: get_group_pins() const fixes pinctrl: add a driver for the CSR SiRFprimaII pinmux pinctrl: add a driver for the U300 pinmux drivers: create a pin control subsystem
This commit is contained in:
Linus Torvalds
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/*
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* Machine interface for the pinctrl subsystem.
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*
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* Copyright (C) 2011 ST-Ericsson SA
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* Written on behalf of Linaro for ST-Ericsson
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* Based on bits of regulator core, gpio core and clk core
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*
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* Author: Linus Walleij <linus.walleij@linaro.org>
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*
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* License terms: GNU General Public License (GPL) version 2
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*/
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#ifndef __LINUX_PINMUX_MACHINE_H
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#define __LINUX_PINMUX_MACHINE_H
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/**
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* struct pinmux_map - boards/machines shall provide this map for devices
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* @name: the name of this specific map entry for the particular machine.
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* This is the second parameter passed to pinmux_get() when you want
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* to have several mappings to the same device
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* @ctrl_dev: the pin control device to be used by this mapping, may be NULL
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* if you provide .ctrl_dev_name instead (this is more common)
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* @ctrl_dev_name: the name of the device controlling this specific mapping,
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* the name must be the same as in your struct device*, may be NULL if
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* you provide .ctrl_dev instead
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* @function: a function in the driver to use for this mapping, the driver
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* will lookup the function referenced by this ID on the specified
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* pin control device
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* @group: sometimes a function can map to different pin groups, so this
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* selects a certain specific pin group to activate for the function, if
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* left as NULL, the first applicable group will be used
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* @dev: the device using this specific mapping, may be NULL if you provide
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* .dev_name instead (this is more common)
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* @dev_name: the name of the device using this specific mapping, the name
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* must be the same as in your struct device*, may be NULL if you
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* provide .dev instead
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* @hog_on_boot: if this is set to true, the pin control subsystem will itself
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* hog the mappings as the pinmux device drivers are attached, so this is
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* typically used with system maps (mux mappings without an assigned
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* device) that you want to get hogged and enabled by default as soon as
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* a pinmux device supporting it is registered. These maps will not be
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* disabled and put until the system shuts down.
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*/
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struct pinmux_map {
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const char *name;
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struct device *ctrl_dev;
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const char *ctrl_dev_name;
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const char *function;
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const char *group;
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struct device *dev;
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const char *dev_name;
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const bool hog_on_boot;
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};
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/*
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* Convenience macro to set a simple map from a certain pin controller and a
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* certain function to a named device
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*/
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#define PINMUX_MAP(a, b, c, d) \
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{ .name = a, .ctrl_dev_name = b, .function = c, .dev_name = d }
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/*
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* Convenience macro to map a system function onto a certain pinctrl device.
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* System functions are not assigned to a particular device.
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*/
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#define PINMUX_MAP_SYS(a, b, c) \
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{ .name = a, .ctrl_dev_name = b, .function = c }
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/*
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* Convenience macro to map a function onto the primary device pinctrl device
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* this is especially helpful on systems that have only one pin controller
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* or need to set up a lot of mappings on the primary controller.
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*/
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#define PINMUX_MAP_PRIMARY(a, b, c) \
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{ .name = a, .ctrl_dev_name = "pinctrl.0", .function = b, \
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.dev_name = c }
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/*
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* Convenience macro to map a system function onto the primary pinctrl device.
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* System functions are not assigned to a particular device.
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*/
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#define PINMUX_MAP_PRIMARY_SYS(a, b) \
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{ .name = a, .ctrl_dev_name = "pinctrl.0", .function = b }
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/*
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* Convenience macro to map a system function onto the primary pinctrl device,
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* to be hogged by the pinmux core until the system shuts down.
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*/
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#define PINMUX_MAP_PRIMARY_SYS_HOG(a, b) \
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{ .name = a, .ctrl_dev_name = "pinctrl.0", .function = b, \
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.hog_on_boot = true }
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#ifdef CONFIG_PINMUX
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extern int pinmux_register_mappings(struct pinmux_map const *map,
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unsigned num_maps);
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#else
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static inline int pinmux_register_mappings(struct pinmux_map const *map,
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unsigned num_maps)
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{
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return 0;
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}
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#endif /* !CONFIG_PINMUX */
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#endif
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@@ -0,0 +1,133 @@
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/*
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* Interface the pinctrl subsystem
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*
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* Copyright (C) 2011 ST-Ericsson SA
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* Written on behalf of Linaro for ST-Ericsson
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* This interface is used in the core to keep track of pins.
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*
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* Author: Linus Walleij <linus.walleij@linaro.org>
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*
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* License terms: GNU General Public License (GPL) version 2
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*/
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#ifndef __LINUX_PINCTRL_PINCTRL_H
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#define __LINUX_PINCTRL_PINCTRL_H
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#ifdef CONFIG_PINCTRL
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#include <linux/radix-tree.h>
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#include <linux/spinlock.h>
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#include <linux/list.h>
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#include <linux/seq_file.h>
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struct pinctrl_dev;
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struct pinmux_ops;
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struct gpio_chip;
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/**
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* struct pinctrl_pin_desc - boards/machines provide information on their
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* pins, pads or other muxable units in this struct
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* @number: unique pin number from the global pin number space
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* @name: a name for this pin
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*/
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struct pinctrl_pin_desc {
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unsigned number;
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const char *name;
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};
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/* Convenience macro to define a single named or anonymous pin descriptor */
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#define PINCTRL_PIN(a, b) { .number = a, .name = b }
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#define PINCTRL_PIN_ANON(a) { .number = a }
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/**
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* struct pinctrl_gpio_range - each pin controller can provide subranges of
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* the GPIO number space to be handled by the controller
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* @node: list node for internal use
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* @name: a name for the chip in this range
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* @id: an ID number for the chip in this range
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* @base: base offset of the GPIO range
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* @npins: number of pins in the GPIO range, including the base number
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* @gc: an optional pointer to a gpio_chip
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*/
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struct pinctrl_gpio_range {
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struct list_head node;
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const char *name;
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unsigned int id;
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unsigned int base;
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unsigned int npins;
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struct gpio_chip *gc;
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};
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/**
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* struct pinctrl_ops - global pin control operations, to be implemented by
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* pin controller drivers.
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* @list_groups: list the number of selectable named groups available
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* in this pinmux driver, the core will begin on 0 and call this
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* repeatedly as long as it returns >= 0 to enumerate the groups
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* @get_group_name: return the group name of the pin group
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* @get_group_pins: return an array of pins corresponding to a certain
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* group selector @pins, and the size of the array in @num_pins
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* @pin_dbg_show: optional debugfs display hook that will provide per-device
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* info for a certain pin in debugfs
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*/
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struct pinctrl_ops {
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int (*list_groups) (struct pinctrl_dev *pctldev, unsigned selector);
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const char *(*get_group_name) (struct pinctrl_dev *pctldev,
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unsigned selector);
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int (*get_group_pins) (struct pinctrl_dev *pctldev,
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unsigned selector,
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const unsigned **pins,
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unsigned *num_pins);
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void (*pin_dbg_show) (struct pinctrl_dev *pctldev, struct seq_file *s,
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unsigned offset);
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};
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/**
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* struct pinctrl_desc - pin controller descriptor, register this to pin
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* control subsystem
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* @name: name for the pin controller
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* @pins: an array of pin descriptors describing all the pins handled by
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* this pin controller
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* @npins: number of descriptors in the array, usually just ARRAY_SIZE()
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* of the pins field above
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* @maxpin: since pin spaces may be sparse, there can he "holes" in the
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* pin range, this attribute gives the maximum pin number in the
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* total range. This should not be lower than npins for example,
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* but may be equal to npins if you have no holes in the pin range.
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* @pctlops: pin control operation vtable, to support global concepts like
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* grouping of pins, this is optional.
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* @pmxops: pinmux operation vtable, if you support pinmuxing in your driver
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* @owner: module providing the pin controller, used for refcounting
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*/
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struct pinctrl_desc {
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const char *name;
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struct pinctrl_pin_desc const *pins;
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unsigned int npins;
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unsigned int maxpin;
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struct pinctrl_ops *pctlops;
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struct pinmux_ops *pmxops;
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struct module *owner;
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};
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/* External interface to pin controller */
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extern struct pinctrl_dev *pinctrl_register(struct pinctrl_desc *pctldesc,
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struct device *dev, void *driver_data);
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extern void pinctrl_unregister(struct pinctrl_dev *pctldev);
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extern bool pin_is_valid(struct pinctrl_dev *pctldev, int pin);
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extern void pinctrl_add_gpio_range(struct pinctrl_dev *pctldev,
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struct pinctrl_gpio_range *range);
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extern void pinctrl_remove_gpio_range(struct pinctrl_dev *pctldev,
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struct pinctrl_gpio_range *range);
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extern const char *pinctrl_dev_get_name(struct pinctrl_dev *pctldev);
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extern void *pinctrl_dev_get_drvdata(struct pinctrl_dev *pctldev);
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#else
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/* Sufficiently stupid default function when pinctrl is not in use */
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static inline bool pin_is_valid(struct pinctrl_dev *pctldev, int pin)
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{
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return pin >= 0;
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}
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#endif /* !CONFIG_PINCTRL */
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#endif /* __LINUX_PINCTRL_PINCTRL_H */
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@@ -0,0 +1,117 @@
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/*
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* Interface the pinmux subsystem
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*
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* Copyright (C) 2011 ST-Ericsson SA
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* Written on behalf of Linaro for ST-Ericsson
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* Based on bits of regulator core, gpio core and clk core
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*
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* Author: Linus Walleij <linus.walleij@linaro.org>
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*
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* License terms: GNU General Public License (GPL) version 2
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*/
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#ifndef __LINUX_PINCTRL_PINMUX_H
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#define __LINUX_PINCTRL_PINMUX_H
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#include <linux/list.h>
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#include <linux/seq_file.h>
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#include "pinctrl.h"
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/* This struct is private to the core and should be regarded as a cookie */
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struct pinmux;
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#ifdef CONFIG_PINMUX
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struct pinctrl_dev;
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/**
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* struct pinmux_ops - pinmux operations, to be implemented by pin controller
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* drivers that support pinmuxing
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* @request: called by the core to see if a certain pin can be made available
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* available for muxing. This is called by the core to acquire the pins
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* before selecting any actual mux setting across a function. The driver
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* is allowed to answer "no" by returning a negative error code
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* @free: the reverse function of the request() callback, frees a pin after
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* being requested
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* @list_functions: list the number of selectable named functions available
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* in this pinmux driver, the core will begin on 0 and call this
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* repeatedly as long as it returns >= 0 to enumerate mux settings
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* @get_function_name: return the function name of the muxing selector,
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* called by the core to figure out which mux setting it shall map a
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* certain device to
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* @get_function_groups: return an array of groups names (in turn
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* referencing pins) connected to a certain function selector. The group
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* name can be used with the generic @pinctrl_ops to retrieve the
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* actual pins affected. The applicable groups will be returned in
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* @groups and the number of groups in @num_groups
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* @enable: enable a certain muxing function with a certain pin group. The
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* driver does not need to figure out whether enabling this function
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* conflicts some other use of the pins in that group, such collisions
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* are handled by the pinmux subsystem. The @func_selector selects a
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* certain function whereas @group_selector selects a certain set of pins
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* to be used. On simple controllers the latter argument may be ignored
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* @disable: disable a certain muxing selector with a certain pin group
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* @gpio_request_enable: requests and enables GPIO on a certain pin.
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* Implement this only if you can mux every pin individually as GPIO. The
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* affected GPIO range is passed along with an offset into that
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* specific GPIO range - function selectors and pin groups are orthogonal
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* to this, the core will however make sure the pins do not collide
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*/
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struct pinmux_ops {
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int (*request) (struct pinctrl_dev *pctldev, unsigned offset);
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int (*free) (struct pinctrl_dev *pctldev, unsigned offset);
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int (*list_functions) (struct pinctrl_dev *pctldev, unsigned selector);
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const char *(*get_function_name) (struct pinctrl_dev *pctldev,
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unsigned selector);
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int (*get_function_groups) (struct pinctrl_dev *pctldev,
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unsigned selector,
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const char * const **groups,
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unsigned * const num_groups);
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int (*enable) (struct pinctrl_dev *pctldev, unsigned func_selector,
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unsigned group_selector);
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void (*disable) (struct pinctrl_dev *pctldev, unsigned func_selector,
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unsigned group_selector);
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int (*gpio_request_enable) (struct pinctrl_dev *pctldev,
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struct pinctrl_gpio_range *range,
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unsigned offset);
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};
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/* External interface to pinmux */
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extern int pinmux_request_gpio(unsigned gpio);
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extern void pinmux_free_gpio(unsigned gpio);
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extern struct pinmux * __must_check pinmux_get(struct device *dev, const char *name);
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extern void pinmux_put(struct pinmux *pmx);
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extern int pinmux_enable(struct pinmux *pmx);
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extern void pinmux_disable(struct pinmux *pmx);
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#else /* !CONFIG_PINMUX */
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static inline int pinmux_request_gpio(unsigned gpio)
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{
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return 0;
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}
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static inline void pinmux_free_gpio(unsigned gpio)
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{
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}
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static inline struct pinmux * __must_check pinmux_get(struct device *dev, const char *name)
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{
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return NULL;
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}
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static inline void pinmux_put(struct pinmux *pmx)
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{
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}
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static inline int pinmux_enable(struct pinmux *pmx)
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{
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return 0;
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}
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static inline void pinmux_disable(struct pinmux *pmx)
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{
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}
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#endif /* CONFIG_PINMUX */
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#endif /* __LINUX_PINCTRL_PINMUX_H */
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