diff options
Diffstat (limited to 'arch/arm/plat-samsung/include/plat/gpio-cfg.h')
| -rw-r--r-- | arch/arm/plat-samsung/include/plat/gpio-cfg.h | 178 |
1 files changed, 0 insertions, 178 deletions
diff --git a/arch/arm/plat-samsung/include/plat/gpio-cfg.h b/arch/arm/plat-samsung/include/plat/gpio-cfg.h deleted file mode 100644 index 469c220e092b..000000000000 --- a/arch/arm/plat-samsung/include/plat/gpio-cfg.h +++ /dev/null @@ -1,178 +0,0 @@ -/* 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> - * - * S3C Platform - GPIO pin configuration - */ - -/* This file contains the necessary definitions to get the basic gpio - * pin configuration done such as setting a pin to input or output or - * changing the pull-{up,down} configurations. - */ - -/* Note, this interface is being added to the s3c64xx arch first and will - * be added to the s3c24xx systems later. - */ - -#ifndef __PLAT_GPIO_CFG_H -#define __PLAT_GPIO_CFG_H __FILE__ - -#include <linux/types.h> - -typedef unsigned int __bitwise samsung_gpio_pull_t; - -/* forward declaration if gpio-core.h hasn't been included */ -struct samsung_gpio_chip; - -/** - * struct samsung_gpio_cfg GPIO configuration - * @cfg_eint: Configuration setting when used for external interrupt source - * @get_pull: Read the current pull configuration for the GPIO - * @set_pull: Set the current pull configuration for the GPIO - * @set_config: Set the current configuration for the GPIO - * @get_config: Read the current configuration for the GPIO - * - * Each chip can have more than one type of GPIO bank available and some - * have different capabilites even when they have the same control register - * layouts. Provide an point to vector control routine and provide any - * per-bank configuration information that other systems such as the - * external interrupt code will need. - * - * @sa samsung_gpio_cfgpin - * @sa s3c_gpio_getcfg - * @sa s3c_gpio_setpull - * @sa s3c_gpio_getpull - */ -struct samsung_gpio_cfg { - unsigned int cfg_eint; - - samsung_gpio_pull_t (*get_pull)(struct samsung_gpio_chip *chip, unsigned offs); - int (*set_pull)(struct samsung_gpio_chip *chip, unsigned offs, - samsung_gpio_pull_t pull); - - unsigned (*get_config)(struct samsung_gpio_chip *chip, unsigned offs); - int (*set_config)(struct samsung_gpio_chip *chip, unsigned offs, - unsigned config); -}; - -#define S3C_GPIO_SPECIAL_MARK (0xfffffff0) -#define S3C_GPIO_SPECIAL(x) (S3C_GPIO_SPECIAL_MARK | (x)) - -/* Defines for generic pin configurations */ -#define S3C_GPIO_INPUT (S3C_GPIO_SPECIAL(0)) -#define S3C_GPIO_OUTPUT (S3C_GPIO_SPECIAL(1)) -#define S3C_GPIO_SFN(x) (S3C_GPIO_SPECIAL(x)) - -#define samsung_gpio_is_cfg_special(_cfg) \ - (((_cfg) & S3C_GPIO_SPECIAL_MARK) == S3C_GPIO_SPECIAL_MARK) - -/** - * s3c_gpio_cfgpin() - Change the GPIO function of a pin. - * @pin pin The pin number to configure. - * @to to The configuration for the pin's function. - * - * Configure which function is actually connected to the external - * pin, such as an gpio input, output or some form of special function - * connected to an internal peripheral block. - * - * The @to parameter can be one of the generic S3C_GPIO_INPUT, S3C_GPIO_OUTPUT - * or S3C_GPIO_SFN() to indicate one of the possible values that the helper - * will then generate the correct bit mask and shift for the configuration. - * - * If a bank of GPIOs all needs to be set to special-function 2, then - * the following code will work: - * - * for (gpio = start; gpio < end; gpio++) - * s3c_gpio_cfgpin(gpio, S3C_GPIO_SFN(2)); - * - * The @to parameter can also be a specific value already shifted to the - * correct position in the control register, although these are discouraged - * in newer kernels and are only being kept for compatibility. - */ -extern int s3c_gpio_cfgpin(unsigned int pin, unsigned int to); - -/** - * s3c_gpio_getcfg - Read the current function for a GPIO pin - * @pin: The pin to read the configuration value for. - * - * Read the configuration state of the given @pin, returning a value that - * could be passed back to s3c_gpio_cfgpin(). - * - * @sa s3c_gpio_cfgpin - */ -extern unsigned s3c_gpio_getcfg(unsigned int pin); - -/** - * s3c_gpio_cfgpin_range() - Change the GPIO function for configuring pin range - * @start: The pin number to start at - * @nr: The number of pins to configure from @start. - * @cfg: The configuration for the pin's function - * - * Call s3c_gpio_cfgpin() for the @nr pins starting at @start. - * - * @sa s3c_gpio_cfgpin. - */ -extern int s3c_gpio_cfgpin_range(unsigned int start, unsigned int nr, - unsigned int cfg); - -/* Define values for the pull-{up,down} available for each gpio pin. - * - * These values control the state of the weak pull-{up,down} resistors - * available on most pins on the S3C series. Not all chips support both - * up or down settings, and it may be dependent on the chip that is being - * used to whether the particular mode is available. - */ -#define S3C_GPIO_PULL_NONE ((__force samsung_gpio_pull_t)0x00) -#define S3C_GPIO_PULL_DOWN ((__force samsung_gpio_pull_t)0x01) -#define S3C_GPIO_PULL_UP ((__force samsung_gpio_pull_t)0x02) - -/** - * s3c_gpio_setpull() - set the state of a gpio pin pull resistor - * @pin: The pin number to configure the pull resistor. - * @pull: The configuration for the pull resistor. - * - * This function sets the state of the pull-{up,down} resistor for the - * specified pin. It will return 0 if successful, or a negative error - * code if the pin cannot support the requested pull setting. - * - * @pull is one of S3C_GPIO_PULL_NONE, S3C_GPIO_PULL_DOWN or S3C_GPIO_PULL_UP. -*/ -extern int s3c_gpio_setpull(unsigned int pin, samsung_gpio_pull_t pull); - -/** - * s3c_gpio_getpull() - get the pull resistor state of a gpio pin - * @pin: The pin number to get the settings for - * - * Read the pull resistor value for the specified pin. -*/ -extern samsung_gpio_pull_t s3c_gpio_getpull(unsigned int pin); - -/* configure `all` aspects of an gpio */ - -/** - * s3c_gpio_cfgall_range() - configure range of gpio functtion and pull. - * @start: The gpio number to start at. - * @nr: The number of gpio to configure from @start. - * @cfg: The configuration to use - * @pull: The pull setting to use. - * - * Run s3c_gpio_cfgpin() and s3c_gpio_setpull() over the gpio range starting - * @gpio and running for @size. - * - * @sa s3c_gpio_cfgpin - * @sa s3c_gpio_setpull - * @sa s3c_gpio_cfgpin_range - */ -extern int s3c_gpio_cfgall_range(unsigned int start, unsigned int nr, - unsigned int cfg, samsung_gpio_pull_t pull); - -static inline int s3c_gpio_cfgrange_nopull(unsigned int pin, unsigned int size, - unsigned int cfg) -{ - return s3c_gpio_cfgall_range(pin, size, cfg, S3C_GPIO_PULL_NONE); -} - -#endif /* __PLAT_GPIO_CFG_H */ |