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authorBen Dooks <ben-linux@fluff.org>2005-10-28 15:26:41 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2005-10-28 15:26:41 +0100
commit42d3a120fe9a1831b88e7037ce0b048d82433b09 (patch)
tree0fef604e20da25b1c6254ebda98d00cfce2498e2
parentc09f98271f685af349d3f0199360f1c0e85550e0 (diff)
[ARM] 3033/1: S3C2410 - add generic gpio_cfgpin options
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>
-rw-r--r--arch/arm/mach-s3c2410/gpio.c22
-rw-r--r--include/asm-arm/arch-s3c2410/regs-gpio.h6
2 files changed, 28 insertions, 0 deletions
diff --git a/arch/arm/mach-s3c2410/gpio.c b/arch/arm/mach-s3c2410/gpio.c
index 94f1776cf31..23ea3d5fa09 100644
--- a/arch/arm/mach-s3c2410/gpio.c
+++ b/arch/arm/mach-s3c2410/gpio.c
@@ -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);
diff --git a/include/asm-arm/arch-s3c2410/regs-gpio.h b/include/asm-arm/arch-s3c2410/regs-gpio.h
index 2053cbacffc..cb33d57c146 100644
--- a/include/asm-arm/arch-s3c2410/regs-gpio.h
+++ b/include/asm-arm/arch-s3c2410/regs-gpio.h
@@ -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 */