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[ARM] 3033/1: S3C2410 - add generic gpio_cfgpin options

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Patch from Ben Dooks

Add generic values for the parameters to the
s3c2410_gpio_cfgpin() function, so that a caller
does not need to know the exact constant for
the specified pin.

This is very useful for the case where a driver
is passed a gpio pin number and needs to reconfigure
the pin's function.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Ben Dooks 2005-10-28 15:26:41 +01:00 committed by Russell King
parent c09f98271f
commit 42d3a120fe
2 changed files with 28 additions and 0 deletions
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22
arch/arm/mach-s3c2410/gpio.c
View File

@ -30,6 +30,7 @@
* 04-Oct-2004 BJD Added irq filter controls for GPIO
* 05-Nov-2004 BJD EXPORT_SYMBOL() added for all code
* 13-Mar-2005 BJD Updates for __iomem
* 26-Oct-2005 BJD Added generic configuration types
*/
@ -58,6 +59,27 @@ void s3c2410_gpio_cfgpin(unsigned int pin, unsigned int function)
mask = 3 << S3C2410_GPIO_OFFSET(pin)*2;
}
switch (function) {
case S3C2410_GPIO_LEAVE:
mask = 0;
function = 0;
break;
case S3C2410_GPIO_INPUT:
case S3C2410_GPIO_OUTPUT:
case S3C2410_GPIO_SFN2:
case S3C2410_GPIO_SFN3:
if (pin < S3C2410_GPIO_BANKB) {
function &= 1;
function <<= S3C2410_GPIO_OFFSET(pin);
} else {
function &= 3;
function <<= S3C2410_GPIO_OFFSET(pin)*2;
}
}
/* modify the specified register wwith IRQs off */
local_irq_save(flags);
con = __raw_readl(base + 0x00);

6
include/asm-arm/arch-s3c2410/regs-gpio.h
View File

@ -20,6 +20,7 @@
* 18-11-2004 BJD Added S3C2440 AC97 controls
* 10-Mar-2005 LCVR Changed S3C2410_VA to S3C24XX_VA
* 28-Mar-2005 LCVR Fixed definition of GPB10
* 26-Oct-2005 BJD Added generic configuration types
*/
@ -43,6 +44,11 @@
/* general configuration options */
#define S3C2410_GPIO_LEAVE (0xFFFFFFFF)
#define S3C2410_GPIO_INPUT (0xFFFFFFF0)
#define S3C2410_GPIO_OUTPUT (0xFFFFFFF1)
#define S3C2410_GPIO_IRQ (0xFFFFFFF2) /* not available for all */
#define S3C2410_GPIO_SFN2 (0xFFFFFFF2) /* not available on A */
#define S3C2410_GPIO_SFN3 (0xFFFFFFF3) /* not available on A */
/* configure GPIO ports A..G */