91 lines
3.2 KiB
C
91 lines
3.2 KiB
C
/*
|
|
* 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 }
|
|
|
|
#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
|