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[ARM] 4783/1: S3C24XX: Add s3c2410_gpio_getpull()
Add the call s3c2410_gpio_getpull() to return the current state of the pin's pull-up. Signed-off-by: Ben Dooks <ben-linux@fluff.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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2 changed files with 25 additions and 0 deletions
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@ -122,6 +122,19 @@ void s3c2410_gpio_pullup(unsigned int pin, unsigned int to)
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EXPORT_SYMBOL(s3c2410_gpio_pullup);
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int s3c2410_gpio_getpull(unsigned int pin)
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{
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void __iomem *base = S3C24XX_GPIO_BASE(pin);
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unsigned long offs = S3C2410_GPIO_OFFSET(pin);
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if (pin < S3C2410_GPIO_BANKB)
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return -EINVAL;
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return (__raw_readl(base + 0x08) & (1L << offs)) ? 1 : 0;
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}
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EXPORT_SYMBOL(s3c2410_gpio_getpull);
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void s3c2410_gpio_setpin(unsigned int pin, unsigned int to)
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{
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void __iomem *base = S3C24XX_GPIO_BASE(pin);
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@ -87,6 +87,18 @@ extern int s3c2410_gpio_irqfilter(unsigned int pin, unsigned int on,
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extern void s3c2410_gpio_pullup(unsigned int pin, unsigned int to);
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/* s3c2410_gpio_getpull
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*
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* Read the state of the pull-up on a given pin
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*
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* return:
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* < 0 => error code
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* 0 => enabled
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* 1 => disabled
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*/
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extern int s3c2410_gpio_getpull(unsigned int pin);
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extern void s3c2410_gpio_setpin(unsigned int pin, unsigned int to);
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extern unsigned int s3c2410_gpio_getpin(unsigned int pin);
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