| /* arch/arm/mach-s3c2410/include/mach/gpio-fns.h |
| * |
| * Copyright (c) 2003-2009 Simtec Electronics |
| * Ben Dooks <ben@simtec.co.uk> |
| * |
| * S3C2410 - hardware |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| */ |
| |
| /* These functions are in the to-be-removed category and it is strongly |
| * encouraged not to use these in new code. They will be marked deprecated |
| * very soon. |
| * |
| * Most of the functionality can be either replaced by the gpiocfg calls |
| * for the s3c platform or by the generic GPIOlib API. |
| */ |
| |
| /* external functions for GPIO support |
| * |
| * These allow various different clients to access the same GPIO |
| * registers without conflicting. If your driver only owns the entire |
| * GPIO register, then it is safe to ioremap/__raw_{read|write} to it. |
| */ |
| |
| /* s3c2410_gpio_cfgpin |
| * |
| * set the configuration of the given pin to the value passed. |
| * |
| * eg: |
| * s3c2410_gpio_cfgpin(S3C2410_GPA(0), S3C2410_GPA0_ADDR0); |
| * s3c2410_gpio_cfgpin(S3C2410_GPE(8), S3C2410_GPE8_SDDAT1); |
| */ |
| |
| extern void s3c2410_gpio_cfgpin(unsigned int pin, unsigned int function); |
| |
| extern unsigned int s3c2410_gpio_getcfg(unsigned int pin); |
| |
| /* s3c2410_gpio_getirq |
| * |
| * turn the given pin number into the corresponding IRQ number |
| * |
| * returns: |
| * < 0 = no interrupt for this pin |
| * >=0 = interrupt number for the pin |
| */ |
| |
| extern int s3c2410_gpio_getirq(unsigned int pin); |
| |
| #ifdef CONFIG_CPU_S3C2400 |
| |
| extern int s3c2400_gpio_getirq(unsigned int pin); |
| |
| #endif /* CONFIG_CPU_S3C2400 */ |
| |
| /* s3c2410_gpio_irqfilter |
| * |
| * set the irq filtering on the given pin |
| * |
| * on = 0 => disable filtering |
| * 1 => enable filtering |
| * |
| * config = S3C2410_EINTFLT_PCLK or S3C2410_EINTFLT_EXTCLK orred with |
| * width of filter (0 through 63) |
| * |
| * |
| */ |
| |
| extern int s3c2410_gpio_irqfilter(unsigned int pin, unsigned int on, |
| unsigned int config); |
| |
| /* s3c2410_gpio_pullup |
| * |
| * configure the pull-up control on the given pin |
| * |
| * to = 1 => disable the pull-up |
| * 0 => enable the pull-up |
| * |
| * eg; |
| * |
| * s3c2410_gpio_pullup(S3C2410_GPB(0), 0); |
| * s3c2410_gpio_pullup(S3C2410_GPE(8), 0); |
| */ |
| |
| extern void s3c2410_gpio_pullup(unsigned int pin, unsigned int to); |
| |
| /* s3c2410_gpio_getpull |
| * |
| * Read the state of the pull-up on a given pin |
| * |
| * return: |
| * < 0 => error code |
| * 0 => enabled |
| * 1 => disabled |
| */ |
| |
| extern int s3c2410_gpio_getpull(unsigned int pin); |
| |
| extern void s3c2410_gpio_setpin(unsigned int pin, unsigned int to); |
| |
| extern unsigned int s3c2410_gpio_getpin(unsigned int pin); |