[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 <ben-linux@fluff.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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@ -199,3 +199,19 @@ int s3c2410_gpio_getirq(unsigned int pin)
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}
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EXPORT_SYMBOL(s3c2410_gpio_getirq);
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int s3c2410_gpio_irq2pin(unsigned int irq)
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{
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if (irq >= IRQ_EINT0 && irq <= IRQ_EINT3)
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return S3C2410_GPF0 + (irq - IRQ_EINT0);
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if (irq >= IRQ_EINT4 && irq <= IRQ_EINT7)
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return S3C2410_GPF4 + (irq - IRQ_EINT4);
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if (irq >= IRQ_EINT8 && irq <= IRQ_EINT23)
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return S3C2410_GPG0 + (irq - IRQ_EINT8);
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return -EINVAL;
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}
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EXPORT_SYMBOL(s3c2410_gpio_irq2pin);
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@ -50,6 +50,17 @@ extern unsigned int s3c2410_gpio_getcfg(unsigned int pin);
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extern int s3c2410_gpio_getirq(unsigned int pin);
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/* s3c2410_gpio_irq2pin
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*
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* turn the given irq number into the corresponding GPIO number
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*
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* returns:
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* < 0 = no pin
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* >=0 = gpio pin number
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*/
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extern int s3c2410_gpio_irq2pin(unsigned int irq);
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#ifdef CONFIG_CPU_S3C2400
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extern int s3c2400_gpio_getirq(unsigned int pin);
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