ARM: SAMSUNG: Add GPIO configuration read calls

[deliverable/linux.git] / arch / arm / plat-samsung / gpio-config.c

diff --git a/arch/arm/plat-samsung/gpio-config.c b/arch/arm/plat-samsung/gpio-config.c
index 8aca88d6c4862ce72f95fc12eac1b8d8af4c9ff3..19ab89df24c1f438a8cddddf519fa007c32b47a8 100644 (file)
--- a/arch/arm/plat-samsung/gpio-config.c
+++ b/arch/arm/plat-samsung/gpio-config.c
@@ -1,7 +1,7 @@
 /* linux/arch/arm/plat-s3c/gpio-config.c
  *
  * Copyright 2008 Openmoko, Inc.
- * Copyright 2008 Simtec Electronics
+ * Copyright 2008-2010 Simtec Electronics
  *     Ben Dooks <ben@simtec.co.uk>
  *     http://armlinux.simtec.co.uk/
  *
@@ -87,6 +87,19 @@ int s3c_gpio_setcfg_s3c24xx_a(struct s3c_gpio_chip *chip,
        return 0;
 }
 
+unsigned s3c_gpio_getcfg_s3c24xx_a(struct s3c_gpio_chip *chip,
+                                  unsigned int off)
+{
+       u32 con;
+
+       con = __raw_readl(chip->base);
+       con >>= off;
+       con &= 1;
+       con++;
+
+       return S3C_GPIO_SFN(con);
+}
+
 int s3c_gpio_setcfg_s3c24xx(struct s3c_gpio_chip *chip,
                            unsigned int off, unsigned int cfg)
 {
@@ -109,6 +122,19 @@ int s3c_gpio_setcfg_s3c24xx(struct s3c_gpio_chip *chip,
 
        return 0;
 }
+
+unsigned int s3c_gpio_getcfg_s3c24xx(struct s3c_gpio_chip *chip,
+                                    unsigned int off)
+{
+       u32 con;
+
+       con = __raw_readl(chip->base);
+       con >>= off * 2;
+       con &= 3;
+
+       /* this conversion works for IN and OUT as well as special mode */
+       return S3C_GPIO_SPECIAL(con);
+}
 #endif
 
 #ifdef CONFIG_S3C_GPIO_CFG_S3C64XX
@@ -134,6 +160,25 @@ int s3c_gpio_setcfg_s3c64xx_4bit(struct s3c_gpio_chip *chip,
 
        return 0;
 }
+
+unsigned s3c_gpio_getcfg_s3c64xx_4bit(struct s3c_gpio_chip *chip,
+                                     unsigned int off)
+{
+       void __iomem *reg = chip->base;
+       unsigned int shift = (off & 7) * 4;
+       u32 con;
+
+       if (off < 8 && chip->chip.ngpio > 8)
+               reg -= 4;
+
+       con = __raw_readl(reg);
+       con >>= shift;
+       con &= 0xf;
+
+       /* this conversion works for IN and OUT as well as special mode */
+       return S3C_GPIO_SPECIAL(con);
+}
+
 #endif /* CONFIG_S3C_GPIO_CFG_S3C64XX */
 
 #ifdef CONFIG_S3C_GPIO_PULL_UPDOWN