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/* 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);
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