ARM: OMAP: Add 3430 gpio support

This patch adds 3430 gpio support.

It also contains a fix by Paul Walmsley <paul@pwsan.com> to use the
correct clock names for OMAP3430.

Signed-off-by: Syed Mohammed Khasim <x0khasim@ti.com>
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

2 files changed, 134 insertions, 35 deletions

diff --git a/arch/arm/plat-omap/gpio.c b/arch/arm/plat-omap/gpio.c
index b2a87b8ef673..7dd50a43fbcf 100644
--- a/arch/arm/plat-omap/gpio.c
+++ b/arch/arm/plat-omap/gpio.c
@@ -117,17 +117,29 @@
 #define OMAP24XX_GPIO_CLEARDATAOUT      0x0090
 #define OMAP24XX_GPIO_SETDATAOUT        0x0094
 
+/*
+ * omap34xx specific GPIO registers
+ */
+
+#define OMAP34XX_GPIO1_BASE             (void __iomem *)0x48310000
+#define OMAP34XX_GPIO2_BASE             (void __iomem *)0x49050000
+#define OMAP34XX_GPIO3_BASE             (void __iomem *)0x49052000
+#define OMAP34XX_GPIO4_BASE             (void __iomem *)0x49054000
+#define OMAP34XX_GPIO5_BASE             (void __iomem *)0x49056000
+#define OMAP34XX_GPIO6_BASE             (void __iomem *)0x49058000
+
+
 struct gpio_bank {
         void __iomem *base;
         u16 irq;
         u16 virtual_irq_start;
         int method;
         u32 reserved_map;
-#if defined (CONFIG_ARCH_OMAP16XX) || defined (CONFIG_ARCH_OMAP24XX)
+#if defined(CONFIG_ARCH_OMAP16XX) || defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
         u32 suspend_wakeup;
         u32 saved_wakeup;
 #endif
-#ifdef CONFIG_ARCH_OMAP24XX
+#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
         u32 non_wakeup_gpios;
         u32 enabled_non_wakeup_gpios;
 
@@ -192,6 +204,18 @@ static struct gpio_bank gpio_bank_243x[5] = {
 
 #endif
 
+#ifdef CONFIG_ARCH_OMAP34XX
+static struct gpio_bank gpio_bank_34xx[6] = {
+        { OMAP34XX_GPIO1_BASE, INT_34XX_GPIO_BANK1, IH_GPIO_BASE,       METHOD_GPIO_24XX },
+        { OMAP34XX_GPIO2_BASE, INT_34XX_GPIO_BANK2, IH_GPIO_BASE + 32,  METHOD_GPIO_24XX },
+        { OMAP34XX_GPIO3_BASE, INT_34XX_GPIO_BANK3, IH_GPIO_BASE + 64,  METHOD_GPIO_24XX },
+        { OMAP34XX_GPIO4_BASE, INT_34XX_GPIO_BANK4, IH_GPIO_BASE + 96,  METHOD_GPIO_24XX },
+        { OMAP34XX_GPIO5_BASE, INT_34XX_GPIO_BANK5, IH_GPIO_BASE + 128, METHOD_GPIO_24XX },
+        { OMAP34XX_GPIO6_BASE, INT_34XX_GPIO_BANK6, IH_GPIO_BASE + 160, METHOD_GPIO_24XX },
+};
+
+#endif
+
 static struct gpio_bank *gpio_bank;
 static int gpio_bank_count;
 
@@ -222,6 +246,10 @@ static inline struct gpio_bank *get_gpio_bank(int gpio)
         if (cpu_is_omap24xx())
                 return &gpio_bank[gpio >> 5];
 #endif
+#ifdef CONFIG_ARCH_OMAP34XX
+        if (cpu_is_omap34xx())
+                return &gpio_bank[gpio >> 5];
+#endif
 }
 
 static inline int get_gpio_index(int gpio)
@@ -234,6 +262,10 @@ static inline int get_gpio_index(int gpio)
         if (cpu_is_omap24xx())
                 return gpio & 0x1f;
 #endif
+#ifdef CONFIG_ARCH_OMAP34XX
+        if (cpu_is_omap34xx())
+                return gpio & 0x1f;
+#endif
         return gpio & 0x0f;
 }
 
@@ -264,6 +296,10 @@ static inline int gpio_valid(int gpio)
         if (cpu_is_omap24xx() && gpio < 128)
                 return 0;
 #endif
+#ifdef CONFIG_ARCH_OMAP34XX
+        if (cpu_is_omap34xx() && gpio < 160)
+                return 0;
+#endif
         return -1;
 }
 
@@ -303,7 +339,7 @@ static void _set_gpio_direction(struct gpio_bank *bank, int gpio, int is_input)
                 reg += OMAP730_GPIO_DIR_CONTROL;
                 break;
 #endif
-#ifdef CONFIG_ARCH_OMAP24XX
+#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
         case METHOD_GPIO_24XX:
                 reg += OMAP24XX_GPIO_OE;
                 break;
@@ -377,7 +413,7 @@ static void _set_gpio_dataout(struct gpio_bank *bank, int gpio, int enable)
                         l &= ~(1 << gpio);
                 break;
 #endif
-#ifdef CONFIG_ARCH_OMAP24XX
+#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
         case METHOD_GPIO_24XX:
                 if (enable)
                         reg += OMAP24XX_GPIO_SETDATAOUT;
@@ -435,7 +471,7 @@ int omap_get_gpio_datain(int gpio)
                 reg += OMAP730_GPIO_DATA_INPUT;
                 break;
 #endif
-#ifdef CONFIG_ARCH_OMAP24XX
+#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
         case METHOD_GPIO_24XX:
                 reg += OMAP24XX_GPIO_DATAIN;
                 break;
@@ -455,7 +491,7 @@ do {	\
         __raw_writel(l, base + reg); \
 } while(0)
 
-#ifdef CONFIG_ARCH_OMAP24XX
+#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
 static inline void set_24xx_gpio_triggering(struct gpio_bank *bank, int gpio, int trigger)
 {
         void __iomem *base = bank->base;
@@ -547,7 +583,7 @@ static int _set_gpio_triggering(struct gpio_bank *bank, int gpio, int trigger)
                         goto bad;
                 break;
 #endif
-#ifdef CONFIG_ARCH_OMAP24XX
+#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
         case METHOD_GPIO_24XX:
                 set_24xx_gpio_triggering(bank, gpio, trigger);
                 break;
@@ -567,7 +603,7 @@ static int gpio_irq_type(unsigned irq, unsigned type)
         unsigned gpio;
         int retval;
 
-        if (!cpu_is_omap24xx() && irq > IH_MPUIO_BASE)
+        if (!cpu_class_is_omap2() && irq > IH_MPUIO_BASE)
                 gpio = OMAP_MPUIO(irq - IH_MPUIO_BASE);
         else
                 gpio = irq - IH_GPIO_BASE;
@@ -579,7 +615,7 @@ static int gpio_irq_type(unsigned irq, unsigned type)
                 return -EINVAL;
 
         /* OMAP1 allows only only edge triggering */
-        if (!cpu_is_omap24xx()
+        if (!cpu_class_is_omap2()
                         && (type & (IRQ_TYPE_LEVEL_LOW|IRQ_TYPE_LEVEL_HIGH)))
                 return -EINVAL;
 
@@ -620,7 +656,7 @@ static void _clear_gpio_irqbank(struct gpio_bank *bank, int gpio_mask)
                 reg += OMAP730_GPIO_INT_STATUS;
                 break;
 #endif
-#ifdef CONFIG_ARCH_OMAP24XX
+#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
         case METHOD_GPIO_24XX:
                 reg += OMAP24XX_GPIO_IRQSTATUS1;
                 break;
@@ -632,8 +668,10 @@ static void _clear_gpio_irqbank(struct gpio_bank *bank, int gpio_mask)
         __raw_writel(gpio_mask, reg);
 
         /* Workaround for clearing DSP GPIO interrupts to allow retention */
-        if (cpu_is_omap2420())
+#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
+        if (cpu_is_omap24xx() || cpu_is_omap34xx())
                 __raw_writel(gpio_mask, bank->base + OMAP24XX_GPIO_IRQSTATUS2);
+#endif
 }
 
 static inline void _clear_gpio_irqstatus(struct gpio_bank *bank, int gpio)
@@ -676,7 +714,7 @@ static u32 _get_gpio_irqbank_mask(struct gpio_bank *bank)
                 inv = 1;
                 break;
 #endif
-#ifdef CONFIG_ARCH_OMAP24XX
+#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
         case METHOD_GPIO_24XX:
                 reg += OMAP24XX_GPIO_IRQENABLE1;
                 mask = 0xffffffff;
@@ -739,7 +777,7 @@ static void _enable_gpio_irqbank(struct gpio_bank *bank, int gpio_mask, int enab
                         l |= gpio_mask;
                 break;
 #endif
-#ifdef CONFIG_ARCH_OMAP24XX
+#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
         case METHOD_GPIO_24XX:
                 if (enable)
                         reg += OMAP24XX_GPIO_SETIRQENABLE1;
@@ -785,7 +823,7 @@ static int _set_gpio_wakeup(struct gpio_bank *bank, int gpio, int enable)
                 spin_unlock(&bank->lock);
                 return 0;
 #endif
-#ifdef CONFIG_ARCH_OMAP24XX
+#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
         case METHOD_GPIO_24XX:
                 if (bank->non_wakeup_gpios & (1 << gpio)) {
                         printk(KERN_ERR "Unable to modify wakeup on "
@@ -891,7 +929,7 @@ void omap_free_gpio(int gpio)
                 __raw_writel(1 << get_gpio_index(gpio), reg);
         }
 #endif
-#ifdef CONFIG_ARCH_OMAP24XX
+#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
         if (bank->method == METHOD_GPIO_24XX) {
                 /* Disable wake-up during idle for dynamic tick */
                 void __iomem *reg = bank->base + OMAP24XX_GPIO_CLEARWKUENA;
@@ -940,7 +978,7 @@ static void gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
         if (bank->method == METHOD_GPIO_730)
                 isr_reg = bank->base + OMAP730_GPIO_INT_STATUS;
 #endif
-#ifdef CONFIG_ARCH_OMAP24XX
+#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
         if (bank->method == METHOD_GPIO_24XX)
                 isr_reg = bank->base + OMAP24XX_GPIO_IRQSTATUS1;
 #endif
@@ -954,7 +992,7 @@ static void gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
                 if (cpu_is_omap15xx() && (bank->method == METHOD_MPUIO))
                         isr &= 0x0000ffff;
 
-                if (cpu_is_omap24xx()) {
+                if (cpu_class_is_omap2()) {
                         level_mask =
                                 __raw_readl(bank->base +
                                         OMAP24XX_GPIO_LEVELDETECT0) |
@@ -1023,7 +1061,7 @@ static void gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
                         }
                 }
 
-                if (cpu_is_omap24xx()) {
+                if (cpu_class_is_omap2()) {
                         /* clear level sensitive interrupts after handler(s) */
                         _enable_gpio_irqbank(bank, isr_saved & level_mask, 0);
                         _clear_gpio_irqbank(bank, isr_saved & level_mask);
@@ -1199,21 +1237,35 @@ static inline void mpuio_init(void) {}
 /*---------------------------------------------------------------------*/
 
 static int initialized;
+#if !defined(CONFIG_ARCH_OMAP3)
 static struct clk * gpio_ick;
+#endif
+
+#if defined(CONFIG_ARCH_OMAP2)
 static struct clk * gpio_fck;
+#endif
 
-#ifdef CONFIG_ARCH_OMAP2430
+#if defined(CONFIG_ARCH_OMAP2430)
 static struct clk * gpio5_ick;
 static struct clk * gpio5_fck;
 #endif
 
+#if defined(CONFIG_ARCH_OMAP3)
+static struct clk *gpio_fclks[OMAP34XX_NR_GPIOS];
+static struct clk *gpio_iclks[OMAP34XX_NR_GPIOS];
+#endif
+
 static int __init _omap_gpio_init(void)
 {
         int i;
         struct gpio_bank *bank;
+#if defined(CONFIG_ARCH_OMAP3)
+        char clk_name[11];
+#endif
 
         initialized = 1;
 
+#if defined(CONFIG_ARCH_OMAP1)
         if (cpu_is_omap15xx()) {
                 gpio_ick = clk_get(NULL, "arm_gpio_ck");
                 if (IS_ERR(gpio_ick))
@@ -1221,7 +1273,9 @@ static int __init _omap_gpio_init(void)
                 else
                         clk_enable(gpio_ick);
         }
-        if (cpu_is_omap24xx()) {
+#endif
+#if defined(CONFIG_ARCH_OMAP2)
+        if (cpu_class_is_omap2()) {
                 gpio_ick = clk_get(NULL, "gpios_ick");
                 if (IS_ERR(gpio_ick))
                         printk("Could not get gpios_ick\n");
@@ -1234,9 +1288,9 @@ static int __init _omap_gpio_init(void)
                         clk_enable(gpio_fck);
 
                 /*
-                 * On 2430 GPIO 5 uses CORE L4 ICLK
+                 * On 2430 & 3430 GPIO 5 uses CORE L4 ICLK
                  */
-#ifdef CONFIG_ARCH_OMAP2430
+#if defined(CONFIG_ARCH_OMAP2430)
                 if (cpu_is_omap2430()) {
                         gpio5_ick = clk_get(NULL, "gpio5_ick");
                         if (IS_ERR(gpio5_ick))
@@ -1250,7 +1304,28 @@ static int __init _omap_gpio_init(void)
                                 clk_enable(gpio5_fck);
                 }
 #endif
-}
+        }
+#endif
+
+#if defined(CONFIG_ARCH_OMAP3)
+        if (cpu_is_omap34xx()) {
+                for (i = 0; i < OMAP34XX_NR_GPIOS; i++) {
+                        sprintf(clk_name, "gpio%d_ick", i + 1);
+                        gpio_iclks[i] = clk_get(NULL, clk_name);
+                        if (IS_ERR(gpio_iclks[i]))
+                                printk(KERN_ERR "Could not get %s\n", clk_name);
+                        else
+                                clk_enable(gpio_iclks[i]);
+                        sprintf(clk_name, "gpio%d_fck", i + 1);
+                        gpio_fclks[i] = clk_get(NULL, clk_name);
+                        if (IS_ERR(gpio_fclks[i]))
+                                printk(KERN_ERR "Could not get %s\n", clk_name);
+                        else
+                                clk_enable(gpio_fclks[i]);
+                }
+        }
+#endif
+
 
 #ifdef CONFIG_ARCH_OMAP15XX
         if (cpu_is_omap15xx()) {
@@ -1298,6 +1373,17 @@ static int __init _omap_gpio_init(void)
                         (rev >> 4) & 0x0f, rev & 0x0f);
         }
 #endif
+#ifdef CONFIG_ARCH_OMAP34XX
+        if (cpu_is_omap34xx()) {
+                int rev;
+
+                gpio_bank_count = OMAP34XX_NR_GPIOS;
+                gpio_bank = gpio_bank_34xx;
+                rev = omap_readl(gpio_bank[0].base + OMAP24XX_GPIO_REVISION);
+                printk(KERN_INFO "OMAP34xx GPIO hardware version %d.%d\n",
+                        (rev >> 4) & 0x0f, rev & 0x0f);
+        }
+#endif
         for (i = 0; i < gpio_bank_count; i++) {
                 int j, gpio_count = 16;
 
@@ -1328,7 +1414,7 @@ static int __init _omap_gpio_init(void)
                         gpio_count = 32; /* 730 has 32-bit GPIOs */
                 }
 #endif
-#ifdef CONFIG_ARCH_OMAP24XX
+#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
                 if (bank->method == METHOD_GPIO_24XX) {
                         static const u32 non_wakeup_gpios[] = {
                                 0xe203ffc0, 0x08700040
@@ -1364,21 +1450,23 @@ static int __init _omap_gpio_init(void)
         if (cpu_is_omap16xx())
                 omap_writel(omap_readl(ULPD_CAM_CLK_CTRL) | 0x04, ULPD_CAM_CLK_CTRL);
 
-#ifdef CONFIG_ARCH_OMAP24XX
+#if defined(CONFIG_ARCH_OMAP24XX)
         /* Enable autoidle for the OCP interface */
         if (cpu_is_omap24xx())
                 omap_writel(1 << 0, 0x48019010);
+#elif defined(CONFIG_ARCH_OMAP34XX)
+        if (cpu_is_omap34xx())
+                omap_writel(1 << 0, 0x48306814);
 #endif
-
         return 0;
 }
 
-#if defined (CONFIG_ARCH_OMAP16XX) || defined (CONFIG_ARCH_OMAP24XX)
+#if defined(CONFIG_ARCH_OMAP16XX) || defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
 static int omap_gpio_suspend(struct sys_device *dev, pm_message_t mesg)
 {
         int i;
 
-        if (!cpu_is_omap24xx() && !cpu_is_omap16xx())
+        if (!cpu_class_is_omap2() && !cpu_is_omap16xx())
                 return 0;
 
         for (i = 0; i < gpio_bank_count; i++) {
@@ -1395,7 +1483,7 @@ static int omap_gpio_suspend(struct sys_device *dev, pm_message_t mesg)
                         wake_set = bank->base + OMAP1610_GPIO_SET_WAKEUPENA;
                         break;
 #endif
-#ifdef CONFIG_ARCH_OMAP24XX
+#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
                 case METHOD_GPIO_24XX:
                         wake_status = bank->base + OMAP24XX_GPIO_SETWKUENA;
                         wake_clear = bank->base + OMAP24XX_GPIO_CLEARWKUENA;
@@ -1435,7 +1523,7 @@ static int omap_gpio_resume(struct sys_device *dev)
                         wake_set = bank->base + OMAP1610_GPIO_SET_WAKEUPENA;
                         break;
 #endif
-#ifdef CONFIG_ARCH_OMAP24XX
+#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
                 case METHOD_GPIO_24XX:
                         wake_clear = bank->base + OMAP24XX_GPIO_CLEARWKUENA;
                         wake_set = bank->base + OMAP24XX_GPIO_SETWKUENA;
@@ -1467,7 +1555,7 @@ static struct sys_device omap_gpio_device = {
 
 #endif
 
-#ifdef CONFIG_ARCH_OMAP24XX
+#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
 
 static int workaround_enabled;
 
@@ -1483,15 +1571,19 @@ void omap2_gpio_prepare_for_retention(void)
 
                 if (!(bank->enabled_non_wakeup_gpios))
                         continue;
+#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
                 bank->saved_datain = __raw_readl(bank->base + OMAP24XX_GPIO_DATAIN);
                 l1 = __raw_readl(bank->base + OMAP24XX_GPIO_FALLINGDETECT);
                 l2 = __raw_readl(bank->base + OMAP24XX_GPIO_RISINGDETECT);
+#endif
                 bank->saved_fallingdetect = l1;
                 bank->saved_risingdetect = l2;
                 l1 &= ~bank->enabled_non_wakeup_gpios;
                 l2 &= ~bank->enabled_non_wakeup_gpios;
+#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
                 __raw_writel(l1, bank->base + OMAP24XX_GPIO_FALLINGDETECT);
                 __raw_writel(l2, bank->base + OMAP24XX_GPIO_RISINGDETECT);
+#endif
                 c++;
         }
         if (!c) {
@@ -1513,26 +1605,31 @@ void omap2_gpio_resume_after_retention(void)
 
                 if (!(bank->enabled_non_wakeup_gpios))
                         continue;
+#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
                 __raw_writel(bank->saved_fallingdetect,
                                  bank->base + OMAP24XX_GPIO_FALLINGDETECT);
                 __raw_writel(bank->saved_risingdetect,
                                  bank->base + OMAP24XX_GPIO_RISINGDETECT);
+#endif
                 /* Check if any of the non-wakeup interrupt GPIOs have changed
                  * state.  If so, generate an IRQ by software.  This is
                  * horribly racy, but it's the best we can do to work around
                  * this silicon bug. */
+#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
                 l = __raw_readl(bank->base + OMAP24XX_GPIO_DATAIN);
+#endif
                 l ^= bank->saved_datain;
                 l &= bank->non_wakeup_gpios;
                 if (l) {
                         u32 old0, old1;
-
+#if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
                         old0 = __raw_readl(bank->base + OMAP24XX_GPIO_LEVELDETECT0);
                         old1 = __raw_readl(bank->base + OMAP24XX_GPIO_LEVELDETECT1);
                         __raw_writel(old0 | l, bank->base + OMAP24XX_GPIO_LEVELDETECT0);
                         __raw_writel(old1 | l, bank->base + OMAP24XX_GPIO_LEVELDETECT1);
                         __raw_writel(old0, bank->base + OMAP24XX_GPIO_LEVELDETECT0);
                         __raw_writel(old1, bank->base + OMAP24XX_GPIO_LEVELDETECT1);
+#endif
                 }
         }
 
@@ -1561,8 +1658,8 @@ static int __init omap_gpio_sysinit(void)
 
         mpuio_init();
 
-#if defined(CONFIG_ARCH_OMAP16XX) || defined(CONFIG_ARCH_OMAP24XX)
-        if (cpu_is_omap16xx() || cpu_is_omap24xx()) {
+#if defined(CONFIG_ARCH_OMAP16XX) || defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
+        if (cpu_is_omap16xx() || cpu_class_is_omap2()) {
                 if (ret == 0) {
                         ret = sysdev_class_register(&omap_gpio_sysclass);
                         if (ret == 0)
@@ -1624,7 +1721,7 @@ static int dbg_gpio_show(struct seq_file *s, void *unused)
 
                 if (bank_is_mpuio(bank))
                         gpio = OMAP_MPUIO(0);
-                else if (cpu_is_omap24xx() || cpu_is_omap730())
+                else if (cpu_class_is_omap2() || cpu_is_omap730())
                         bankwidth = 32;
 
                 for (j = 0; j < bankwidth; j++, gpio++, mask <<= 1) {
diff --git a/include/asm-arm/arch-omap/gpio.h b/include/asm-arm/arch-omap/gpio.h
index 97b397dd7e87..c782ef9a2ace 100644
--- a/include/asm-arm/arch-omap/gpio.h
+++ b/include/asm-arm/arch-omap/gpio.h
@@ -62,6 +62,8 @@
 #define OMAP_MPUIO_LATCH                0x34
 #endif
 
+#define OMAP34XX_NR_GPIOS               6
+
 #define OMAP_MPUIO(nr)          (OMAP_MAX_GPIO_LINES + (nr))
 #define OMAP_GPIO_IS_MPUIO(nr)  ((nr) >= OMAP_MAX_GPIO_LINES)