mfd: asic3 gpiolib support

ASIC3 is, among other things, a GPIO extender. We should thus have it
supporting the current gpiolib API.

Signed-off-by: Samuel Ortiz <sameo@openedhand.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

1 files changed, 11 insertions, 13 deletions

diff --git a/include/linux/mfd/asic3.h b/include/linux/mfd/asic3.h
index 4ab2162db13b..06ef8165f406 100644
--- a/include/linux/mfd/asic3.h
+++ b/include/linux/mfd/asic3.h
@@ -16,16 +16,6 @@
 
 #include <linux/types.h>
 
-struct asic3 {
-        void __iomem *mapping;
-        unsigned int bus_shift;
-        unsigned int irq_nr;
-        unsigned int irq_base;
-        spinlock_t lock;
-        u16 irq_bothedge[4];
-        struct device *dev;
-};
-
 struct asic3_platform_data {
         struct {
                 u32 dir;
@@ -41,18 +31,19 @@ struct asic3_platform_data {
 
         unsigned int irq_base;
 
+        unsigned int gpio_base;
+
         struct platform_device **children;
         unsigned int n_children;
 };
 
-int asic3_gpio_get_value(struct asic3 *asic, unsigned gpio);
-void asic3_gpio_set_value(struct asic3 *asic, unsigned gpio, int val);
-
 #define ASIC3_NUM_GPIO_BANKS    4
 #define ASIC3_GPIOS_PER_BANK    16
 #define ASIC3_NUM_GPIOS         64
 #define ASIC3_NR_IRQS           ASIC3_NUM_GPIOS + 6
 
+#define ASIC3_TO_GPIO(gpio) (NR_BUILTIN_GPIO + (gpio))
+
 #define ASIC3_GPIO_BANK_A       0
 #define ASIC3_GPIO_BANK_B       1
 #define ASIC3_GPIO_BANK_C       2
@@ -73,6 +64,13 @@ void asic3_gpio_set_value(struct asic3 *asic, unsigned gpio, int val);
 #define ASIC3_GPIO_C_Base      0x0200
 #define ASIC3_GPIO_D_Base      0x0300
 
+#define ASIC3_GPIO_TO_BANK(gpio) ((gpio) >> 4)
+#define ASIC3_GPIO_TO_BIT(gpio)  ((gpio) - \
+                                  (ASIC3_GPIOS_PER_BANK * ((gpio) >> 4)))
+#define ASIC3_GPIO_TO_MASK(gpio) (1 << ASIC3_GPIO_TO_BIT(gpio))
+#define ASIC3_GPIO_TO_BASE(gpio) (ASIC3_GPIO_A_Base + (((gpio) >> 4) * 0x0100))
+#define ASIC3_BANK_TO_BASE(bank) (ASIC3_GPIO_A_Base + ((bank) * 0x100))
+
 #define ASIC3_GPIO_Mask          0x00    /* R/W 0:don't mask */
 #define ASIC3_GPIO_Direction     0x04    /* R/W 0:input */
 #define ASIC3_GPIO_Out           0x08    /* R/W 0:output low */