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/*
* Machine interface for the pinctrl subsystem.
*
* Copyright (C) 2011 ST-Ericsson SA
* Written on behalf of Linaro for ST-Ericsson
* Based on bits of regulator core, gpio core and clk core
*
* Author: Linus Walleij <linus.walleij@linaro.org>
*
* License terms: GNU General Public License (GPL) version 2
*/
#ifndef __LINUX_PINMUX_MACHINE_H
#define __LINUX_PINMUX_MACHINE_H
/**
* struct pinmux_map - boards/machines shall provide this map for devices
* @name: the name of this specific map entry for the particular machine.
* This is the second parameter passed to pinmux_get() when you want
* to have several mappings to the same device
* @ctrl_dev: the pin control device to be used by this mapping, may be NULL
* if you provide .ctrl_dev_name instead (this is more common)
* @ctrl_dev_name: the name of the device controlling this specific mapping,
* the name must be the same as in your struct device*, may be NULL if
* you provide .ctrl_dev instead
* @function: a function in the driver to use for this mapping, the driver
* will lookup the function referenced by this ID on the specified
* pin control device
* @group: sometimes a function can map to different pin groups, so this
* selects a certain specific pin group to activate for the function, if
* left as NULL, the first applicable group will be used
* @dev: the device using this specific mapping, may be NULL if you provide
* .dev_name instead (this is more common)
* @dev_name: the name of the device using this specific mapping, the name
* must be the same as in your struct device*, may be NULL if you
* provide .dev instead
* @hog_on_boot: if this is set to true, the pin control subsystem will itself
* hog the mappings as the pinmux device drivers are attached, so this is
* typically used with system maps (mux mappings without an assigned
* device) that you want to get hogged and enabled by default as soon as
* a pinmux device supporting it is registered. These maps will not be
* disabled and put until the system shuts down.
*/
struct pinmux_map {
const char *name;
struct device *ctrl_dev;
const char *ctrl_dev_name;
const char *function;
const char *group;
struct device *dev;
const char *dev_name;
bool hog_on_boot;
};
/*
* Convenience macro to set a simple map from a certain pin controller and a
* certain function to a named device
*/
#define PINMUX_MAP(a, b, c, d) \
{ .name = a, .ctrl_dev_name = b, .function = c, .dev_name = d }
/*
* Convenience macro to map a system function onto a certain pinctrl device.
* System functions are not assigned to a particular device.
*/
#define PINMUX_MAP_SYS(a, b, c) \
{ .name = a, .ctrl_dev_name = b, .function = c }
/*
* Convenience macro to map a system function onto a certain pinctrl device,
* to be hogged by the pinmux core until the system shuts down.
*/
#define PINMUX_MAP_SYS_HOG(a, b, c) \
{ .name = a, .ctrl_dev_name = b, .function = c, \
.hog_on_boot = true }
/*
* Convenience macro to map a system function onto a certain pinctrl device
* using a specified group, to be hogged by the pinmux core until the system
* shuts down.
*/
#define PINMUX_MAP_SYS_HOG_GROUP(a, b, c, d) \
{ .name = a, .ctrl_dev_name = b, .function = c, .group = d, \
.hog_on_boot = true }
#ifdef CONFIG_PINMUX
extern int pinmux_register_mappings(struct pinmux_map const *map,
unsigned num_maps);
#else
static inline int pinmux_register_mappings(struct pinmux_map const *map,
unsigned num_maps)
{
return 0;
}
#endif /* !CONFIG_PINMUX */
#endif
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