ARM: SAMSUNG: Move GPIO common functions to plat-samsung

This patch moves GPIO common functions (from plat-s3c64xx) into plat-samsung.
and adds the config option to build the plat-samsung/gpiolib for Samsung SoCs.

Signed-off-by: Adityapratap Sharma <aditya.ps@samsung.com>
Signed-off-by: Atul Dahiya <atul.dahiya@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>

1 files changed, 2 insertions, 160 deletions

diff --git a/arch/arm/plat-s3c64xx/gpiolib.c b/arch/arm/plat-s3c64xx/gpiolib.c
index 778560457277..265e23b6de8e 100644
--- a/arch/arm/plat-s3c64xx/gpiolib.c
+++ b/arch/arm/plat-s3c64xx/gpiolib.c
@@ -49,150 +49,6 @@
  * [2] BANK has two control registers, GPxCON0 and GPxCON1
  */
 
-#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 s3c64xx_gpiolib_4bit 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 s3c64xx_gpiolib_4bit_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 s3c64xx_gpiolib_4bit_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;
-}
-
-/* The next set of routines are for the case where the GPIO configuration
- * registers are 4 bits per GPIO but there is more than one register (the
- * bank has more than 8 GPIOs.
- *
- * This case is the similar to the 4 bit case, but the registers are as
- * follows:
- *
- * base + 0x00: Control register, 4 bits per gpio (lower 8 GPIOs)
- *              gpio n: 4 bits starting at (4*n)
- *              0000 = input, 0001 = output, others mean special-function
- * base + 0x04: Control register, 4 bits per gpio (up to 8 additions GPIOs)
- *              gpio n: 4 bits starting at (4*n)
- *              0000 = input, 0001 = output, others mean special-function
- * base + 0x08: Data register, 1 bit per gpio
- *              bit n: data bit n
- *
- * To allow us to use the s3c_gpiolib_get and s3c_gpiolib_set routines we
- * store the 'base + 0x4' address so that these routines see the data
- * register at ourchip->base + 0x04.
-*/
-
-static int s3c64xx_gpiolib_4bit2_input(struct gpio_chip *chip, unsigned offset)
-{
-        struct s3c_gpio_chip *ourchip = to_s3c_gpio(chip);
-        void __iomem *base = ourchip->base;
-        void __iomem *regcon = base;
-        unsigned long con;
-
-        if (offset > 7)
-                offset -= 8;
-        else
-                regcon -= 4;
-
-        con = __raw_readl(regcon);
-        con &= ~(0xf << con_4bit_shift(offset));
-        __raw_writel(con, regcon);
-
-        gpio_dbg("%s: %p: CON %08lx\n", __func__, base, con);
-
-        return 0;
-
-}
-
-static int s3c64xx_gpiolib_4bit2_output(struct gpio_chip *chip,
-                                       unsigned offset, int value)
-{
-        struct s3c_gpio_chip *ourchip = to_s3c_gpio(chip);
-        void __iomem *base = ourchip->base;
-        void __iomem *regcon = base;
-        unsigned long con;
-        unsigned long dat;
-
-        if (offset > 7)
-                offset -= 8;
-        else
-                regcon -= 4;
-
-        con = __raw_readl(regcon);
-        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, regcon);
-        __raw_writel(dat, base + OFF_GPDAT);
-
-        gpio_dbg("%s: %p: CON %08lx, DAT %08lx\n", __func__, base, con, dat);
-
-        return 0;
-}
-
 static struct s3c_gpio_cfg gpio_4bit_cfg_noint = {
         .set_config     = s3c_gpio_setcfg_s3c64xx_4bit,
         .set_pull       = s3c_gpio_setpull_updown,
@@ -399,20 +255,6 @@ static struct s3c_gpio_chip gpio_2bit[] = {
         },
 };
 
-static __init void s3c64xx_gpiolib_add_4bit(struct s3c_gpio_chip *chip)
-{
-        chip->chip.direction_input = s3c64xx_gpiolib_4bit_input;
-        chip->chip.direction_output = s3c64xx_gpiolib_4bit_output;
-        chip->pm = __gpio_pm(&s3c_gpio_pm_4bit);
-}
-
-static __init void s3c64xx_gpiolib_add_4bit2(struct s3c_gpio_chip *chip)
-{
-        chip->chip.direction_input = s3c64xx_gpiolib_4bit2_input;
-        chip->chip.direction_output = s3c64xx_gpiolib_4bit2_output;
-        chip->pm = __gpio_pm(&s3c_gpio_pm_4bit);
-}
-
 static __init void s3c64xx_gpiolib_add_2bit(struct s3c_gpio_chip *chip)
 {
         chip->pm = __gpio_pm(&s3c_gpio_pm_2bit);
@@ -432,10 +274,10 @@ static __init void s3c64xx_gpiolib_add(struct s3c_gpio_chip *chips,
 static __init int s3c64xx_gpiolib_init(void)
 {
         s3c64xx_gpiolib_add(gpio_4bit, ARRAY_SIZE(gpio_4bit),
-                            s3c64xx_gpiolib_add_4bit);
+                            samsung_gpiolib_add_4bit);
 
         s3c64xx_gpiolib_add(gpio_4bit2, ARRAY_SIZE(gpio_4bit2),
-                            s3c64xx_gpiolib_add_4bit2);
+                            samsung_gpiolib_add_4bit2);
 
         s3c64xx_gpiolib_add(gpio_2bit, ARRAY_SIZE(gpio_2bit),
                             s3c64xx_gpiolib_add_2bit);