Merge branch 'v4l_for_2.6.35' of git://git.kernel.org/pub/scm/linux/kernel/git/mcheha...

[pandora-kernel.git] / arch / arm / plat-s3c24xx / gpio.c

diff --git a/arch/arm/plat-s3c24xx/gpio.c b/arch/arm/plat-s3c24xx/gpio.c
index c7c0cd7..2f3d7c0 100644 (file)
--- a/arch/arm/plat-s3c24xx/gpio.c
+++ b/arch/arm/plat-s3c24xx/gpio.c
@@ -1,6 +1,6 @@
 /* linux/arch/arm/plat-s3c24xx/gpio.c
  *
- * Copyright (c) 2004-2005 Simtec Electronics
+ * Copyright (c) 2004-2010 Simtec Electronics
  *     Ben Dooks <ben@simtec.co.uk>
  *
  * S3C24XX GPIO support
@@ -25,6 +25,7 @@
 #include <linux/module.h>
 #include <linux/interrupt.h>
 #include <linux/ioport.h>
+#include <linux/gpio.h>
 #include <linux/io.h>
 
 #include <mach/hardware.h>
@@ -33,54 +34,46 @@
 
 #include <mach/regs-gpio.h>
 
+#include <plat/gpio-core.h>
+
+/* gpiolib wrappers until these are totally eliminated */
+
 void s3c2410_gpio_pullup(unsigned int pin, unsigned int to)
 {
-       void __iomem *base = S3C24XX_GPIO_BASE(pin);
-       unsigned long offs = S3C2410_GPIO_OFFSET(pin);
-       unsigned long flags;
-       unsigned long up;
+       int ret;
 
-       if (pin < S3C2410_GPIO_BANKB)
-               return;
+       WARN_ON(to);    /* should be none of these left */
 
-       local_irq_save(flags);
+       if (!to) {
+               /* if pull is enabled, try first with up, and if that
+                * fails, try using down */
 
-       up = __raw_readl(base + 0x08);
-       up &= ~(1L << offs);
-       up |= to << offs;
-       __raw_writel(up, base + 0x08);
-
-       local_irq_restore(flags);
+               ret = s3c_gpio_setpull(pin, S3C_GPIO_PULL_UP);
+               if (ret)
+                       s3c_gpio_setpull(pin, S3C_GPIO_PULL_DOWN);
+       } else {
+               s3c_gpio_setpull(pin, S3C_GPIO_PULL_NONE);
+       }
 }
-
 EXPORT_SYMBOL(s3c2410_gpio_pullup);
 
-
 void s3c2410_gpio_setpin(unsigned int pin, unsigned int to)
 {
-       void __iomem *base = S3C24XX_GPIO_BASE(pin);
-       unsigned long offs = S3C2410_GPIO_OFFSET(pin);
-       unsigned long flags;
-       unsigned long dat;
-
-       local_irq_save(flags);
-
-       dat = __raw_readl(base + 0x04);
-       dat &= ~(1 << offs);
-       dat |= to << offs;
-       __raw_writel(dat, base + 0x04);
+       /* do this via gpiolib until all users removed */
 
-       local_irq_restore(flags);
+       gpio_request(pin, "temporary");
+       gpio_set_value(pin, to);
+       gpio_free(pin);
 }
 
 EXPORT_SYMBOL(s3c2410_gpio_setpin);
 
 unsigned int s3c2410_gpio_getpin(unsigned int pin)
 {
-       void __iomem *base = S3C24XX_GPIO_BASE(pin);
-       unsigned long offs = S3C2410_GPIO_OFFSET(pin);
+       struct s3c_gpio_chip *chip = s3c_gpiolib_getchip(pin);
+       unsigned long offs = pin - chip->chip.base;
 
-       return __raw_readl(base + 0x04) & (1<< offs);
+       return __raw_readl(chip->base + 0x04) & (1<< offs);
 }
 
 EXPORT_SYMBOL(s3c2410_gpio_getpin);