omap: GPIO: Fix OMAP4 GPIO reg access issues

Access to some of the OMAP4 GPIO registers are not properly handled.
This patch fixes it.

This patch is tested on 3430SDP and 4430SDP boards

Signed-off-by: Charulatha V <charu@ti.com>
Acked-by: Kevin Hilman <khilman@deeprootsystems.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

diff --git a/arch/arm/plat-omap/gpio.c b/arch/arm/plat-omap/gpio.c
index 955597fd6d3524081b75d76e947c5c0bcc40caeb..dc2ac42d63195f0dbe6c3b7acd964eef117e9661 100644 (file)
--- a/arch/arm/plat-omap/gpio.c
+++ b/arch/arm/plat-omap/gpio.c
@@ -138,7 +138,11 @@
 #define OMAP4_GPIO_IRQSTATUSCLR1       0x0040
 #define OMAP4_GPIO_IRQWAKEN0           0x0044
 #define OMAP4_GPIO_IRQWAKEN1           0x0048
-#define OMAP4_GPIO_SYSSTATUS           0x0104
+#define OMAP4_GPIO_SYSSTATUS           0x0114
+#define OMAP4_GPIO_IRQENABLE1          0x011c
+#define OMAP4_GPIO_WAKE_EN             0x0120
+#define OMAP4_GPIO_IRQSTATUS2          0x0128
+#define OMAP4_GPIO_IRQENABLE2          0x012c
 #define OMAP4_GPIO_CTRL                        0x0130
 #define OMAP4_GPIO_OE                  0x0134
 #define OMAP4_GPIO_DATAIN              0x0138
@@ -149,6 +153,10 @@
 #define OMAP4_GPIO_FALLINGDETECT       0x014c
 #define OMAP4_GPIO_DEBOUNCENABLE       0x0150
 #define OMAP4_GPIO_DEBOUNCINGTIME      0x0154
+#define OMAP4_GPIO_CLEARIRQENABLE1     0x0160
+#define OMAP4_GPIO_SETIRQENABLE1       0x0164
+#define OMAP4_GPIO_CLEARWKUENA         0x0180
+#define OMAP4_GPIO_SETWKUENA           0x0184
 #define OMAP4_GPIO_CLEARDATAOUT                0x0190
 #define OMAP4_GPIO_SETDATAOUT          0x0194
 /*
@@ -591,11 +599,15 @@ static int _get_gpio_dataout(struct gpio_bank *bank, int gpio)
                reg += OMAP7XX_GPIO_DATA_OUTPUT;
                break;
 #endif
-#ifdef CONFIG_ARCH_OMAP2PLUS
+#if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
        case METHOD_GPIO_24XX:
-       case METHOD_GPIO_44XX:
                reg += OMAP24XX_GPIO_DATAOUT;
                break;
+#endif
+#ifdef CONFIG_ARCH_OMAP4
+       case METHOD_GPIO_44XX:
+               reg += OMAP4_GPIO_DATAOUT;
+               break;
 #endif
        default:
                return -EINVAL;
@@ -1213,11 +1225,17 @@ static int omap_gpio_request(struct gpio_chip *chip, unsigned offset)
 #endif
        if (!cpu_class_is_omap1()) {
                if (!bank->mod_usage) {
+                       void __iomem *reg = bank->base;
                        u32 ctrl;
-                       ctrl = __raw_readl(bank->base + OMAP24XX_GPIO_CTRL);
-                       ctrl &= 0xFFFFFFFE;
+
+                       if (cpu_is_omap24xx() || cpu_is_omap34xx())
+                               reg += OMAP24XX_GPIO_CTRL;
+                       else if (cpu_is_omap44xx())
+                               reg += OMAP4_GPIO_CTRL;
+                       ctrl = __raw_readl(reg);
                        /* Module is enabled, clocks are not gated */
-                       __raw_writel(ctrl, bank->base + OMAP24XX_GPIO_CTRL);
+                       ctrl &= 0xFFFFFFFE;
+                       __raw_writel(ctrl, reg);
                }
                bank->mod_usage |= 1 << offset;
        }
@@ -1239,22 +1257,34 @@ static void omap_gpio_free(struct gpio_chip *chip, unsigned offset)
                __raw_writel(1 << offset, reg);
        }
 #endif
-#ifdef CONFIG_ARCH_OMAP2PLUS
-       if ((bank->method == METHOD_GPIO_24XX) ||
-                       (bank->method == METHOD_GPIO_44XX)) {
+#if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
+       if (bank->method == METHOD_GPIO_24XX) {
                /* Disable wake-up during idle for dynamic tick */
                void __iomem *reg = bank->base + OMAP24XX_GPIO_CLEARWKUENA;
                __raw_writel(1 << offset, reg);
        }
+#endif
+#ifdef CONFIG_ARCH_OMAP4
+       if (bank->method == METHOD_GPIO_44XX) {
+               /* Disable wake-up during idle for dynamic tick */
+               void __iomem *reg = bank->base + OMAP4_GPIO_IRQWAKEN0;
+               __raw_writel(1 << offset, reg);
+       }
 #endif
        if (!cpu_class_is_omap1()) {
                bank->mod_usage &= ~(1 << offset);
                if (!bank->mod_usage) {
+                       void __iomem *reg = bank->base;
                        u32 ctrl;
-                       ctrl = __raw_readl(bank->base + OMAP24XX_GPIO_CTRL);
+
+                       if (cpu_is_omap24xx() || cpu_is_omap34xx())
+                               reg += OMAP24XX_GPIO_CTRL;
+                       else if (cpu_is_omap44xx())
+                               reg += OMAP4_GPIO_CTRL;
+                       ctrl = __raw_readl(reg);
                        /* Module is disabled, clocks are gated */
                        ctrl |= 1;
-                       __raw_writel(ctrl, bank->base + OMAP24XX_GPIO_CTRL);
+                       __raw_writel(ctrl, reg);
                }
        }
        _reset_gpio(bank, bank->chip.base + offset);
@@ -1583,9 +1613,14 @@ static int gpio_is_input(struct gpio_bank *bank, int mask)
                reg += OMAP7XX_GPIO_DIR_CONTROL;
                break;
        case METHOD_GPIO_24XX:
-       case METHOD_GPIO_44XX:
                reg += OMAP24XX_GPIO_OE;
                break;
+       case METHOD_GPIO_44XX:
+               reg += OMAP4_GPIO_OE;
+               break;
+       default:
+               WARN_ONCE(1, "gpio_is_input: incorrect OMAP GPIO method");
+               return -EINVAL;
        }
        return __raw_readl(reg) & mask;
 }