164 lines
5.6 KiB
C
164 lines
5.6 KiB
C
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/* linux/arch/arm/plat-samsung/include/plat/gpio-cfg-helper.h
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*
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* Copyright 2008 Openmoko, Inc.
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* Copyright 2008 Simtec Electronics
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* http://armlinux.simtec.co.uk/
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* Ben Dooks <ben@simtec.co.uk>
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*
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* Samsung Platform - GPIO pin configuration helper definitions
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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/* This is meant for core cpu support, machine or other driver files
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* should not be including this header.
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*/
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#ifndef __PLAT_GPIO_CFG_HELPERS_H
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#define __PLAT_GPIO_CFG_HELPERS_H __FILE__
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/* As a note, all gpio configuration functions are entered exclusively, either
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* with the relevant lock held or the system prevented from doing anything else
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* by disabling interrupts.
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*/
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static inline int samsung_gpio_do_setcfg(struct samsung_gpio_chip *chip,
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unsigned int off, unsigned int config)
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{
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return (chip->config->set_config)(chip, off, config);
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}
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static inline unsigned samsung_gpio_do_getcfg(struct samsung_gpio_chip *chip,
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unsigned int off)
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{
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return (chip->config->get_config)(chip, off);
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}
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static inline int samsung_gpio_do_setpull(struct samsung_gpio_chip *chip,
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unsigned int off, samsung_gpio_pull_t pull)
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{
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return (chip->config->set_pull)(chip, off, pull);
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}
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static inline samsung_gpio_pull_t samsung_gpio_do_getpull(struct samsung_gpio_chip *chip,
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unsigned int off)
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{
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return chip->config->get_pull(chip, off);
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}
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/* Pull-{up,down} resistor controls.
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*
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* S3C2410,S3C2440 = Pull-UP,
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* S3C2412,S3C2413 = Pull-Down
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* S3C6400,S3C6410 = Pull-Both [None,Down,Up,Undef]
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* S3C2443 = Pull-Both [not same as S3C6400]
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*/
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/**
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* s3c24xx_gpio_setpull_1up() - Pull configuration for choice of up or none.
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* @chip: The gpio chip that is being configured.
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* @off: The offset for the GPIO being configured.
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* @param: pull: The pull mode being requested.
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*
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* This is a helper function for the case where we have GPIOs with one
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* bit configuring the presence of a pull-up resistor.
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*/
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extern int s3c24xx_gpio_setpull_1up(struct samsung_gpio_chip *chip,
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unsigned int off, samsung_gpio_pull_t pull);
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/**
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* s3c24xx_gpio_setpull_1down() - Pull configuration for choice of down or none
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* @chip: The gpio chip that is being configured
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* @off: The offset for the GPIO being configured
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* @param: pull: The pull mode being requested
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*
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* This is a helper function for the case where we have GPIOs with one
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* bit configuring the presence of a pull-down resistor.
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*/
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extern int s3c24xx_gpio_setpull_1down(struct samsung_gpio_chip *chip,
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unsigned int off, samsung_gpio_pull_t pull);
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/**
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* samsung_gpio_setpull_upown() - Pull configuration for choice of up,
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* down or none
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*
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* @chip: The gpio chip that is being configured.
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* @off: The offset for the GPIO being configured.
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* @param: pull: The pull mode being requested.
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*
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* This is a helper function for the case where we have GPIOs with two
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* bits configuring the presence of a pull resistor, in the following
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* order:
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* 00 = No pull resistor connected
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* 01 = Pull-up resistor connected
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* 10 = Pull-down resistor connected
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*/
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extern int samsung_gpio_setpull_updown(struct samsung_gpio_chip *chip,
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unsigned int off, samsung_gpio_pull_t pull);
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/**
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* samsung_gpio_getpull_updown() - Get configuration for choice of up,
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* down or none
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*
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* @chip: The gpio chip that the GPIO pin belongs to
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* @off: The offset to the pin to get the configuration of.
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*
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* This helper function reads the state of the pull-{up,down} resistor
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* for the given GPIO in the same case as samsung_gpio_setpull_upown.
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*/
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extern samsung_gpio_pull_t samsung_gpio_getpull_updown(struct samsung_gpio_chip *chip,
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unsigned int off);
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/**
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* s3c24xx_gpio_getpull_1up() - Get configuration for choice of up or none
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* @chip: The gpio chip that the GPIO pin belongs to
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* @off: The offset to the pin to get the configuration of.
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*
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* This helper function reads the state of the pull-up resistor for the
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* given GPIO in the same case as s3c24xx_gpio_setpull_1up.
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*/
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extern samsung_gpio_pull_t s3c24xx_gpio_getpull_1up(struct samsung_gpio_chip *chip,
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unsigned int off);
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/**
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* s3c24xx_gpio_getpull_1down() - Get configuration for choice of down or none
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* @chip: The gpio chip that the GPIO pin belongs to
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* @off: The offset to the pin to get the configuration of.
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*
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* This helper function reads the state of the pull-down resistor for the
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* given GPIO in the same case as s3c24xx_gpio_setpull_1down.
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*/
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extern samsung_gpio_pull_t s3c24xx_gpio_getpull_1down(struct samsung_gpio_chip *chip,
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unsigned int off);
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/**
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* s3c2443_gpio_setpull() - Pull configuration for s3c2443.
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* @chip: The gpio chip that is being configured.
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* @off: The offset for the GPIO being configured.
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* @param: pull: The pull mode being requested.
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*
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* This is a helper function for the case where we have GPIOs with two
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* bits configuring the presence of a pull resistor, in the following
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* order:
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* 00 = Pull-up resistor connected
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* 10 = Pull-down resistor connected
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* x1 = No pull up resistor
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*/
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extern int s3c2443_gpio_setpull(struct samsung_gpio_chip *chip,
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unsigned int off, samsung_gpio_pull_t pull);
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/**
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* s3c2443_gpio_getpull() - Get configuration for s3c2443 pull resistors
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* @chip: The gpio chip that the GPIO pin belongs to.
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* @off: The offset to the pin to get the configuration of.
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*
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* This helper function reads the state of the pull-{up,down} resistor for the
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* given GPIO in the same case as samsung_gpio_setpull_upown.
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*/
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extern samsung_gpio_pull_t s3c2443_gpio_getpull(struct samsung_gpio_chip *chip,
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unsigned int off);
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#endif /* __PLAT_GPIO_CFG_HELPERS_H */
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