Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=c27cb681ac1598352569f75cb19850a12b7ef102
Commit: c27cb681ac1598352569f75cb19850a12b7ef102
Parent: 9b8c0088404778a1291191cf140bcfea082f027c
Author: Ben Dooks <[EMAIL PROTECTED]>
AuthorDate: Mon Jan 28 13:01:33 2008 +0100
Committer: Russell King <[EMAIL PROTECTED]>
CommitDate: Mon Jan 28 13:20:52 2008 +0000
[ARM] 4793/1: S3C24XX: Add IRQ->GPIO pin mapping function
Add the reverse of s3c2410_gpio_getirq to convert
a IRQ number into a GPIO pin number.
Signed-off-by: Ben Dooks <[EMAIL PROTECTED]>
Signed-off-by: Russell King <[EMAIL PROTECTED]>
---
arch/arm/plat-s3c24xx/gpio.c | 16 ++++++++++++++++
include/asm-arm/arch-s3c2410/hardware.h | 11 +++++++++++
2 files changed, 27 insertions(+), 0 deletions(-)
diff --git a/arch/arm/plat-s3c24xx/gpio.c b/arch/arm/plat-s3c24xx/gpio.c
index 7cc6fae..ee99dcc 100644
--- a/arch/arm/plat-s3c24xx/gpio.c
+++ b/arch/arm/plat-s3c24xx/gpio.c
@@ -199,3 +199,19 @@ int s3c2410_gpio_getirq(unsigned int pin)
}
EXPORT_SYMBOL(s3c2410_gpio_getirq);
+
+int s3c2410_gpio_irq2pin(unsigned int irq)
+{
+ if (irq >= IRQ_EINT0 && irq <= IRQ_EINT3)
+ return S3C2410_GPF0 + (irq - IRQ_EINT0);
+
+ if (irq >= IRQ_EINT4 && irq <= IRQ_EINT7)
+ return S3C2410_GPF4 + (irq - IRQ_EINT4);
+
+ if (irq >= IRQ_EINT8 && irq <= IRQ_EINT23)
+ return S3C2410_GPG0 + (irq - IRQ_EINT8);
+
+ return -EINVAL;
+}
+
+EXPORT_SYMBOL(s3c2410_gpio_irq2pin);
diff --git a/include/asm-arm/arch-s3c2410/hardware.h
b/include/asm-arm/arch-s3c2410/hardware.h
index 20509e4..29592c3 100644
--- a/include/asm-arm/arch-s3c2410/hardware.h
+++ b/include/asm-arm/arch-s3c2410/hardware.h
@@ -50,6 +50,17 @@ extern unsigned int s3c2410_gpio_getcfg(unsigned int pin);
extern int s3c2410_gpio_getirq(unsigned int pin);
+/* s3c2410_gpio_irq2pin
+ *
+ * turn the given irq number into the corresponding GPIO number
+ *
+ * returns:
+ * < 0 = no pin
+ * >=0 = gpio pin number
+*/
+
+extern int s3c2410_gpio_irq2pin(unsigned int irq);
+
#ifdef CONFIG_CPU_S3C2400
extern int s3c2400_gpio_getirq(unsigned int pin);
-
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