Viewing file:  gpio-cfg-helpers.h (5.44 KB) -rw-r--r--
Select action/file-type:
 (+) |  (+) |  (+) | Code (+) | Session (+) |  (+) | SDB (+) |  (+) |  (+) |  (+) |  (+) |  (+) |
/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright 2008 Openmoko, Inc.
* Copyright 2008 Simtec Electronics
* http://armlinux.simtec.co.uk/
* Ben Dooks <ben@simtec.co.uk>
*
* Samsung Platform - GPIO pin configuration helper definitions
*/
/* This is meant for core cpu support, machine or other driver files
* should not be including this header.
*/
#ifndef __PLAT_GPIO_CFG_HELPERS_H
#define __PLAT_GPIO_CFG_HELPERS_H __FILE__
/* As a note, all gpio configuration functions are entered exclusively, either
* with the relevant lock held or the system prevented from doing anything else
* by disabling interrupts.
*/
static inline int samsung_gpio_do_setcfg(struct samsung_gpio_chip *chip,
unsigned int off, unsigned int config)
{
return (chip->config->set_config)(chip, off, config);
}
static inline unsigned samsung_gpio_do_getcfg(struct samsung_gpio_chip *chip,
unsigned int off)
{
return (chip->config->get_config)(chip, off);
}
static inline int samsung_gpio_do_setpull(struct samsung_gpio_chip *chip,
unsigned int off, samsung_gpio_pull_t pull)
{
return (chip->config->set_pull)(chip, off, pull);
}
static inline samsung_gpio_pull_t samsung_gpio_do_getpull(struct samsung_gpio_chip *chip,
unsigned int off)
{
return chip->config->get_pull(chip, off);
}
/* Pull-{up,down} resistor controls.
*
* S3C2410,S3C2440 = Pull-UP,
* S3C2412,S3C2413 = Pull-Down
* S3C6400,S3C6410 = Pull-Both [None,Down,Up,Undef]
* S3C2443 = Pull-Both [not same as S3C6400]
*/
/**
* s3c24xx_gpio_setpull_1up() - Pull configuration for choice of up or none.
* @chip: The gpio chip that is being configured.
* @off: The offset for the GPIO being configured.
* @param: pull: The pull mode being requested.
*
* This is a helper function for the case where we have GPIOs with one
* bit configuring the presence of a pull-up resistor.
*/
extern int s3c24xx_gpio_setpull_1up(struct samsung_gpio_chip *chip,
unsigned int off, samsung_gpio_pull_t pull);
/**
* s3c24xx_gpio_setpull_1down() - Pull configuration for choice of down or none
* @chip: The gpio chip that is being configured
* @off: The offset for the GPIO being configured
* @param: pull: The pull mode being requested
*
* This is a helper function for the case where we have GPIOs with one
* bit configuring the presence of a pull-down resistor.
*/
extern int s3c24xx_gpio_setpull_1down(struct samsung_gpio_chip *chip,
unsigned int off, samsung_gpio_pull_t pull);
/**
* samsung_gpio_setpull_upown() - Pull configuration for choice of up,
* down or none
*
* @chip: The gpio chip that is being configured.
* @off: The offset for the GPIO being configured.
* @param: pull: The pull mode being requested.
*
* This is a helper function for the case where we have GPIOs with two
* bits configuring the presence of a pull resistor, in the following
* order:
* 00 = No pull resistor connected
* 01 = Pull-up resistor connected
* 10 = Pull-down resistor connected
*/
extern int samsung_gpio_setpull_updown(struct samsung_gpio_chip *chip,
unsigned int off, samsung_gpio_pull_t pull);
/**
* samsung_gpio_getpull_updown() - Get configuration for choice of up,
* down or none
*
* @chip: The gpio chip that the GPIO pin belongs to
* @off: The offset to the pin to get the configuration of.
*
* This helper function reads the state of the pull-{up,down} resistor
* for the given GPIO in the same case as samsung_gpio_setpull_upown.
*/
extern samsung_gpio_pull_t samsung_gpio_getpull_updown(struct samsung_gpio_chip *chip,
unsigned int off);
/**
* s3c24xx_gpio_getpull_1up() - Get configuration for choice of up or none
* @chip: The gpio chip that the GPIO pin belongs to
* @off: The offset to the pin to get the configuration of.
*
* This helper function reads the state of the pull-up resistor for the
* given GPIO in the same case as s3c24xx_gpio_setpull_1up.
*/
extern samsung_gpio_pull_t s3c24xx_gpio_getpull_1up(struct samsung_gpio_chip *chip,
unsigned int off);
/**
* s3c24xx_gpio_getpull_1down() - Get configuration for choice of down or none
* @chip: The gpio chip that the GPIO pin belongs to
* @off: The offset to the pin to get the configuration of.
*
* This helper function reads the state of the pull-down resistor for the
* given GPIO in the same case as s3c24xx_gpio_setpull_1down.
*/
extern samsung_gpio_pull_t s3c24xx_gpio_getpull_1down(struct samsung_gpio_chip *chip,
unsigned int off);
/**
* s3c2443_gpio_setpull() - Pull configuration for s3c2443.
* @chip: The gpio chip that is being configured.
* @off: The offset for the GPIO being configured.
* @param: pull: The pull mode being requested.
*
* This is a helper function for the case where we have GPIOs with two
* bits configuring the presence of a pull resistor, in the following
* order:
* 00 = Pull-up resistor connected
* 10 = Pull-down resistor connected
* x1 = No pull up resistor
*/
extern int s3c2443_gpio_setpull(struct samsung_gpio_chip *chip,
unsigned int off, samsung_gpio_pull_t pull);
/**
* s3c2443_gpio_getpull() - Get configuration for s3c2443 pull resistors
* @chip: The gpio chip that the GPIO pin belongs to.
* @off: The offset to the pin to get the configuration of.
*
* This helper function reads the state of the pull-{up,down} resistor for the
* given GPIO in the same case as samsung_gpio_setpull_upown.
*/
extern samsung_gpio_pull_t s3c2443_gpio_getpull(struct samsung_gpio_chip *chip,
unsigned int off);
#endif /* __PLAT_GPIO_CFG_HELPERS_H */
|