diff options
Diffstat (limited to 'arch/arm/mach-s3c/gpio-cfg-helpers.h')
| -rw-r--r-- | arch/arm/mach-s3c/gpio-cfg-helpers.h | 159 |
1 files changed, 159 insertions, 0 deletions
diff --git a/arch/arm/mach-s3c/gpio-cfg-helpers.h b/arch/arm/mach-s3c/gpio-cfg-helpers.h new file mode 100644 index 000000000000..db0c56f5ca15 --- /dev/null +++ b/arch/arm/mach-s3c/gpio-cfg-helpers.h @@ -0,0 +1,159 @@ +/* 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 */ |