1/* linux/arch/arm/plat-samsung/include/plat/gpio-cfg-helper.h 2 * 3 * Copyright 2008 Openmoko, Inc. 4 * Copyright 2008 Simtec Electronics 5 * http://armlinux.simtec.co.uk/ 6 * Ben Dooks <ben@simtec.co.uk> 7 * 8 * Samsung Platform - GPIO pin configuration helper definitions 9 * 10 * This program is free software; you can redistribute it and/or modify 11 * it under the terms of the GNU General Public License version 2 as 12 * published by the Free Software Foundation. 13*/ 14 15/* This is meant for core cpu support, machine or other driver files 16 * should not be including this header. 17 */ 18 19#ifndef __PLAT_GPIO_CFG_HELPERS_H 20#define __PLAT_GPIO_CFG_HELPERS_H __FILE__ 21 22/* As a note, all gpio configuration functions are entered exclusively, either 23 * with the relevant lock held or the system prevented from doing anything else 24 * by disabling interrupts. 25*/ 26 27static inline int samsung_gpio_do_setcfg(struct samsung_gpio_chip *chip, 28 unsigned int off, unsigned int config) 29{ 30 return (chip->config->set_config)(chip, off, config); 31} 32 33static inline unsigned samsung_gpio_do_getcfg(struct samsung_gpio_chip *chip, 34 unsigned int off) 35{ 36 return (chip->config->get_config)(chip, off); 37} 38 39static inline int samsung_gpio_do_setpull(struct samsung_gpio_chip *chip, 40 unsigned int off, samsung_gpio_pull_t pull) 41{ 42 return (chip->config->set_pull)(chip, off, pull); 43} 44 45static inline samsung_gpio_pull_t samsung_gpio_do_getpull(struct samsung_gpio_chip *chip, 46 unsigned int off) 47{ 48 return chip->config->get_pull(chip, off); 49} 50 51/* Pull-{up,down} resistor controls. 52 * 53 * S3C2410,S3C2440 = Pull-UP, 54 * S3C2412,S3C2413 = Pull-Down 55 * S3C6400,S3C6410 = Pull-Both [None,Down,Up,Undef] 56 * S3C2443 = Pull-Both [not same as S3C6400] 57 */ 58 59/** 60 * s3c24xx_gpio_setpull_1up() - Pull configuration for choice of up or none. 61 * @chip: The gpio chip that is being configured. 62 * @off: The offset for the GPIO being configured. 63 * @param: pull: The pull mode being requested. 64 * 65 * This is a helper function for the case where we have GPIOs with one 66 * bit configuring the presence of a pull-up resistor. 67 */ 68extern int s3c24xx_gpio_setpull_1up(struct samsung_gpio_chip *chip, 69 unsigned int off, samsung_gpio_pull_t pull); 70 71/** 72 * s3c24xx_gpio_setpull_1down() - Pull configuration for choice of down or none 73 * @chip: The gpio chip that is being configured 74 * @off: The offset for the GPIO being configured 75 * @param: pull: The pull mode being requested 76 * 77 * This is a helper function for the case where we have GPIOs with one 78 * bit configuring the presence of a pull-down resistor. 79 */ 80extern int s3c24xx_gpio_setpull_1down(struct samsung_gpio_chip *chip, 81 unsigned int off, samsung_gpio_pull_t pull); 82 83/** 84 * samsung_gpio_setpull_upown() - Pull configuration for choice of up, 85 * down or none 86 * 87 * @chip: The gpio chip that is being configured. 88 * @off: The offset for the GPIO being configured. 89 * @param: pull: The pull mode being requested. 90 * 91 * This is a helper function for the case where we have GPIOs with two 92 * bits configuring the presence of a pull resistor, in the following 93 * order: 94 * 00 = No pull resistor connected 95 * 01 = Pull-up resistor connected 96 * 10 = Pull-down resistor connected 97 */ 98extern int samsung_gpio_setpull_updown(struct samsung_gpio_chip *chip, 99 unsigned int off, samsung_gpio_pull_t pull); 100 101/** 102 * samsung_gpio_getpull_updown() - Get configuration for choice of up, 103 * down or none 104 * 105 * @chip: The gpio chip that the GPIO pin belongs to 106 * @off: The offset to the pin to get the configuration of. 107 * 108 * This helper function reads the state of the pull-{up,down} resistor 109 * for the given GPIO in the same case as samsung_gpio_setpull_upown. 110*/ 111extern samsung_gpio_pull_t samsung_gpio_getpull_updown(struct samsung_gpio_chip *chip, 112 unsigned int off); 113 114/** 115 * s3c24xx_gpio_getpull_1up() - Get configuration for choice of up or none 116 * @chip: The gpio chip that the GPIO pin belongs to 117 * @off: The offset to the pin to get the configuration of. 118 * 119 * This helper function reads the state of the pull-up resistor for the 120 * given GPIO in the same case as s3c24xx_gpio_setpull_1up. 121*/ 122extern samsung_gpio_pull_t s3c24xx_gpio_getpull_1up(struct samsung_gpio_chip *chip, 123 unsigned int off); 124 125/** 126 * s3c24xx_gpio_getpull_1down() - Get configuration for choice of down or none 127 * @chip: The gpio chip that the GPIO pin belongs to 128 * @off: The offset to the pin to get the configuration of. 129 * 130 * This helper function reads the state of the pull-down resistor for the 131 * given GPIO in the same case as s3c24xx_gpio_setpull_1down. 132*/ 133extern samsung_gpio_pull_t s3c24xx_gpio_getpull_1down(struct samsung_gpio_chip *chip, 134 unsigned int off); 135 136/** 137 * s3c2443_gpio_setpull() - Pull configuration for s3c2443. 138 * @chip: The gpio chip that is being configured. 139 * @off: The offset for the GPIO being configured. 140 * @param: pull: The pull mode being requested. 141 * 142 * This is a helper function for the case where we have GPIOs with two 143 * bits configuring the presence of a pull resistor, in the following 144 * order: 145 * 00 = Pull-up resistor connected 146 * 10 = Pull-down resistor connected 147 * x1 = No pull up resistor 148 */ 149extern int s3c2443_gpio_setpull(struct samsung_gpio_chip *chip, 150 unsigned int off, samsung_gpio_pull_t pull); 151 152/** 153 * s3c2443_gpio_getpull() - Get configuration for s3c2443 pull resistors 154 * @chip: The gpio chip that the GPIO pin belongs to. 155 * @off: The offset to the pin to get the configuration of. 156 * 157 * This helper function reads the state of the pull-{up,down} resistor for the 158 * given GPIO in the same case as samsung_gpio_setpull_upown. 159*/ 160extern samsung_gpio_pull_t s3c2443_gpio_getpull(struct samsung_gpio_chip *chip, 161 unsigned int off); 162 163#endif /* __PLAT_GPIO_CFG_HELPERS_H */ 164