ARM: S5PC100: Use common functions for gpiolib implementation

GPIOlib helpers from plat-samsung already have functions for accessing
4bit gpio banks. This patch removes the duplicated functions from
plat-s5pc1xx/gpiolib.c.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>

2 files changed, 10 insertions, 87 deletions

diff --git a/arch/arm/plat-s5pc1xx/Kconfig b/arch/arm/plat-s5pc1xx/Kconfig
index 79d3be721dde..98bbaf9d2219 100644
--- a/arch/arm/plat-s5pc1xx/Kconfig
+++ b/arch/arm/plat-s5pc1xx/Kconfig
@@ -19,6 +19,7 @@ config PLAT_S5PC1XX
         select S5P_GPIO_DRVSTR
         select S3C_GPIO_CFG_S3C24XX
         select S3C_GPIO_CFG_S3C64XX
+        select SAMSUNG_GPIOLIB_4BIT
         help
           Base platform code for any Samsung S5PC1XX device
 
diff --git a/arch/arm/plat-s5pc1xx/gpiolib.c b/arch/arm/plat-s5pc1xx/gpiolib.c
index 1ffc57ac293d..5a97a8f8e368 100644
--- a/arch/arm/plat-s5pc1xx/gpiolib.c
+++ b/arch/arm/plat-s5pc1xx/gpiolib.c
@@ -61,74 +61,6 @@
  * L3   8       4Bit    None
  */
 
-#define OFF_GPCON       (0x00)
-#define OFF_GPDAT       (0x04)
-
-#define con_4bit_shift(__off) ((__off) * 4)
-
-#if 1
-#define gpio_dbg(x...) do { } while (0)
-#else
-#define gpio_dbg(x...) printk(KERN_DEBUG x)
-#endif
-
-/* The s5pc1xx_gpiolib routines are to control the gpio banks where
- * the gpio configuration register (GPxCON) has 4 bits per GPIO, as the
- * following example:
- *
- * base + 0x00: Control register, 4 bits per gpio
- *              gpio n: 4 bits starting at (4*n)
- *              0000 = input, 0001 = output, others mean special-function
- * base + 0x04: Data register, 1 bit per gpio
- *              bit n: data bit n
- *
- * Note, since the data register is one bit per gpio and is at base + 0x4
- * we can use s3c_gpiolib_get and s3c_gpiolib_set to change the state of
- * the output.
- */
-
-static int s5pc1xx_gpiolib_input(struct gpio_chip *chip, unsigned offset)
-{
-        struct s3c_gpio_chip *ourchip = to_s3c_gpio(chip);
-        void __iomem *base = ourchip->base;
-        unsigned long con;
-
-        con = __raw_readl(base + OFF_GPCON);
-        con &= ~(0xf << con_4bit_shift(offset));
-        __raw_writel(con, base + OFF_GPCON);
-
-        gpio_dbg("%s: %p: CON now %08lx\n", __func__, base, con);
-
-        return 0;
-}
-
-static int s5pc1xx_gpiolib_output(struct gpio_chip *chip,
-                                       unsigned offset, int value)
-{
-        struct s3c_gpio_chip *ourchip = to_s3c_gpio(chip);
-        void __iomem *base = ourchip->base;
-        unsigned long con;
-        unsigned long dat;
-
-        con = __raw_readl(base + OFF_GPCON);
-        con &= ~(0xf << con_4bit_shift(offset));
-        con |= 0x1 << con_4bit_shift(offset);
-
-        dat = __raw_readl(base + OFF_GPDAT);
-        if (value)
-                dat |= 1 << offset;
-        else
-                dat &= ~(1 << offset);
-
-        __raw_writel(dat, base + OFF_GPDAT);
-        __raw_writel(con, base + OFF_GPCON);
-        __raw_writel(dat, base + OFF_GPDAT);
-
-        gpio_dbg("%s: %p: CON %08lx, DAT %08lx\n", __func__, base, con, dat);
-
-        return 0;
-}
-
 static int s5pc1xx_gpiolib_to_irq(struct gpio_chip *chip, unsigned int offset)
 {
         return S3C_IRQ_GPIO(chip->base + offset);
@@ -452,11 +384,8 @@ static struct s3c_gpio_chip s5pc100_gpio_chips[] = {
 extern struct irq_chip s5pc1xx_gpioint;
 extern void s5pc1xx_irq_gpioint_handler(unsigned int irq, struct irq_desc *desc);
 
-static __init void s5pc1xx_gpiolib_link(struct s3c_gpio_chip *chip)
+static __init void s5pc100_gpiolib_link(struct s3c_gpio_chip *chip)
 {
-        chip->chip.direction_input = s5pc1xx_gpiolib_input;
-        chip->chip.direction_output = s5pc1xx_gpiolib_output;
-        chip->pm = __gpio_pm(&s3c_gpio_pm_4bit);
 
         /* Interrupt */
         if (chip->config == &gpio_cfg) {
@@ -475,26 +404,19 @@ static __init void s5pc1xx_gpiolib_link(struct s3c_gpio_chip *chip)
                 chip->chip.to_irq = s5pc1xx_gpiolib_to_eint;
 }
 
-static __init void s5pc1xx_gpiolib_add(struct s3c_gpio_chip *chips,
-                                       int nr_chips,
-                                       void (*fn)(struct s3c_gpio_chip *))
-{
-        for (; nr_chips > 0; nr_chips--, chips++) {
-                if (fn)
-                        (fn)(chips);
-                s3c_gpiolib_add(chips);
-        }
-}
-
 static __init int s5pc1xx_gpiolib_init(void)
 {
-        struct s3c_gpio_chip *chips;
+        struct s3c_gpio_chip *chip;
         int nr_chips;
 
-                chips = s5pc100_gpio_chips;
-                nr_chips = ARRAY_SIZE(s5pc100_gpio_chips);
+        chip = s5pc100_gpio_chips;
+        nr_chips = ARRAY_SIZE(s5pc100_gpio_chips);
+
+        for (; nr_chips > 0; nr_chips--, chip++)
+                s5pc100_gpiolib_link(chip);
 
-        s5pc1xx_gpiolib_add(chips, nr_chips, s5pc1xx_gpiolib_link);
+        samsung_gpiolib_add_4bit_chips(s5pc100_gpio_chips,
+                                       ARRAY_SIZE(s5pc100_gpio_chips));
         /* Interrupt */
         set_irq_chained_handler(IRQ_GPIOINT, s5pc1xx_irq_gpioint_handler);