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159 lines
5.4 KiB
159 lines
5.4 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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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 <[email protected]> |
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* |
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* Samsung Platform - GPIO pin configuration helper definitions |
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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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