pinconf-generic.h

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/*
 * Interface the generic pinconfig portions of the pinctrl subsystem
 *
 * Copyright (C) 2011 ST-Ericsson SA
 * Written on behalf of Linaro for ST-Ericsson
 * This interface is used in the core to keep track of pins.
 *
 * Author: Linus Walleij <[email protected]>
 *
 * License terms: GNU General Public License (GPL) version 2
 */
#ifndef __LINUX_PINCTRL_PINCONF_GENERIC_H
#define __LINUX_PINCTRL_PINCONF_GENERIC_H

/*
 * You shouldn't even be able to compile with these enums etc unless you're
 * using generic pin config. That is why this is defined out.
 */
#ifdef CONFIG_GENERIC_PINCONF

enum pin_config_param {
    PIN_CONFIG_BIAS_DISABLE,
    PIN_CONFIG_BIAS_HIGH_IMPEDANCE,
    PIN_CONFIG_BIAS_PULL_UP,
    PIN_CONFIG_BIAS_PULL_DOWN,
    PIN_CONFIG_DRIVE_PUSH_PULL,
    PIN_CONFIG_DRIVE_OPEN_DRAIN,
    PIN_CONFIG_DRIVE_OPEN_SOURCE,
    PIN_CONFIG_INPUT_SCHMITT,
    PIN_CONFIG_INPUT_DEBOUNCE,
    PIN_CONFIG_POWER_SOURCE,
    PIN_CONFIG_LOW_POWER_MODE,
    PIN_CONFIG_END = 0x7FFF,
};

/*
 * Helpful configuration macro to be used in tables etc.
 */
#define PIN_CONF_PACKED(p, a) ((a << 16) | ((unsigned long) p & 0xffffUL))

/*
 * The following inlines stuffs a configuration parameter and data value
 * into and out of an unsigned long argument, as used by the generic pin config
 * system. We put the parameter in the lower 16 bits and the argument in the
 * upper 16 bits.
 */

static inline enum pin_config_param pinconf_to_config_param(unsigned long config)
{
    return (enum pin_config_param) (config & 0xffffUL);
}

static inline u16 pinconf_to_config_argument(unsigned long config)
{
    return (enum pin_config_param) ((config >> 16) & 0xffffUL);
}

static inline unsigned long pinconf_to_config_packed(enum pin_config_param param,
                             u16 argument)
{
    return PIN_CONF_PACKED(param, argument);
}

#endif /* CONFIG_GENERIC_PINCONF */

#endif /* __LINUX_PINCTRL_PINCONF_GENERIC_H */