Merge git://git.marvell.com/orion into devel

arch/arm/Kconfig

@@ -387,6 +387,7 @@ config ARCH_KIRKWOOD
 	bool "Marvell Kirkwood"
 	select CPU_FEROCEON
 	select PCI
+	select GENERIC_GPIO
 	select GENERIC_TIME
 	select GENERIC_CLOCKEVENTS
 	select PLAT_ORION
@@ -429,6 +430,7 @@ config ARCH_MV78XX0
 	bool "Marvell MV78xx0"
 	select CPU_FEROCEON
 	select PCI
+	select GENERIC_GPIO
 	select GENERIC_TIME
 	select GENERIC_CLOCKEVENTS
 	select PLAT_ORION

arch/arm/mach-kirkwood/include/mach/gpio.h

+/*
+ * arch/asm-arm/mach-kirkwood/include/mach/gpio.h
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2.  This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#ifndef __ASM_ARCH_GPIO_H
+#define __ASM_ARCH_GPIO_H
+
+#include <mach/irqs.h>
+#include <plat/gpio.h>
+#include <asm-generic/gpio.h>		/* cansleep wrappers */
+
+#define GPIO_MAX		50
+#define GPIO_OFF(pin)		(((pin) >> 5) ? 0x0140 : 0x0100)
+#define GPIO_OUT(pin)		(DEV_BUS_VIRT_BASE + GPIO_OFF(pin) + 0x00)
+#define GPIO_IO_CONF(pin)	(DEV_BUS_VIRT_BASE + GPIO_OFF(pin) + 0x04)
+#define GPIO_BLINK_EN(pin)	(DEV_BUS_VIRT_BASE + GPIO_OFF(pin) + 0x08)
+#define GPIO_IN_POL(pin)	(DEV_BUS_VIRT_BASE + GPIO_OFF(pin) + 0x0c)
+#define GPIO_DATA_IN(pin)	(DEV_BUS_VIRT_BASE + GPIO_OFF(pin) + 0x10)
+#define GPIO_EDGE_CAUSE(pin)	(DEV_BUS_VIRT_BASE + GPIO_OFF(pin) + 0x14)
+#define GPIO_EDGE_MASK(pin)	(DEV_BUS_VIRT_BASE + GPIO_OFF(pin) + 0x18)
+#define GPIO_LEVEL_MASK(pin)	(DEV_BUS_VIRT_BASE + GPIO_OFF(pin) + 0x1c)
+
+static inline int gpio_to_irq(int pin)
+{
+	return pin + IRQ_KIRKWOOD_GPIO_START;
+}
+
+static inline int irq_to_gpio(int irq)
+{
+	return irq - IRQ_KIRKWOOD_GPIO_START;
+}
+
+
+#endif

arch/arm/mach-kirkwood/include/mach/irqs.h

@@ -11,8 +11,6 @@
 #ifndef __ASM_ARCH_IRQS_H
 #define __ASM_ARCH_IRQS_H
 
-#include "kirkwood.h"	/* need GPIO_MAX */
-
 /*
  * Low Interrupt Controller
  */
@@ -57,7 +55,7 @@
  * KIRKWOOD General Purpose Pins
  */
 #define IRQ_KIRKWOOD_GPIO_START	64
-#define NR_GPIO_IRQS		GPIO_MAX
+#define NR_GPIO_IRQS		50
 
 #define NR_IRQS			(IRQ_KIRKWOOD_GPIO_START + NR_GPIO_IRQS)
 

arch/arm/mach-kirkwood/include/mach/kirkwood.h

@@ -117,7 +117,4 @@
 #define SATA_PHYS_BASE		(KIRKWOOD_REGS_PHYS_BASE | 0x80000)
 
 
-#define GPIO_MAX		50
-
-
 #endif

arch/arm/mach-kirkwood/irq.c

@@ -13,10 +13,45 @@
 #include <linux/irq.h>
 #include <linux/io.h>
 #include <plat/irq.h>
+#include <asm/gpio.h>
 #include "common.h"
 
+static void gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
+{
+	BUG_ON(irq < IRQ_KIRKWOOD_GPIO_LOW_0_7);
+	BUG_ON(irq > IRQ_KIRKWOOD_GPIO_HIGH_16_23);
+
+	orion_gpio_irq_handler((irq - IRQ_KIRKWOOD_GPIO_LOW_0_7) << 3);
+}
+
 void __init kirkwood_init_irq(void)
 {
+	int i;
+
 	orion_irq_init(0, (void __iomem *)(IRQ_VIRT_BASE + IRQ_MASK_LOW_OFF));
 	orion_irq_init(32, (void __iomem *)(IRQ_VIRT_BASE + IRQ_MASK_HIGH_OFF));
+
+	/*
+	 * Mask and clear GPIO IRQ interrupts.
+	 */
+	writel(0, GPIO_LEVEL_MASK(0));
+	writel(0, GPIO_EDGE_MASK(0));
+	writel(0, GPIO_EDGE_CAUSE(0));
+	writel(0, GPIO_LEVEL_MASK(32));
+	writel(0, GPIO_EDGE_MASK(32));
+	writel(0, GPIO_EDGE_CAUSE(32));
+
+	for (i = IRQ_KIRKWOOD_GPIO_START; i < NR_IRQS; i++) {
+		set_irq_chip(i, &orion_gpio_irq_level_chip);
+		set_irq_handler(i, handle_level_irq);
+		irq_desc[i].status |= IRQ_LEVEL;
+		set_irq_flags(i, IRQF_VALID);
+	}
+	set_irq_chained_handler(IRQ_KIRKWOOD_GPIO_LOW_0_7, gpio_irq_handler);
+	set_irq_chained_handler(IRQ_KIRKWOOD_GPIO_LOW_8_15, gpio_irq_handler);
+	set_irq_chained_handler(IRQ_KIRKWOOD_GPIO_LOW_16_23, gpio_irq_handler);
+	set_irq_chained_handler(IRQ_KIRKWOOD_GPIO_LOW_24_31, gpio_irq_handler);
+	set_irq_chained_handler(IRQ_KIRKWOOD_GPIO_HIGH_0_7, gpio_irq_handler);
+	set_irq_chained_handler(IRQ_KIRKWOOD_GPIO_HIGH_8_15, gpio_irq_handler);
+	set_irq_chained_handler(IRQ_KIRKWOOD_GPIO_HIGH_16_23, gpio_irq_handler);
 }

arch/arm/mach-mv78xx0/include/mach/gpio.h

+/*
+ * arch/asm-arm/mach-mv78xx0/include/mach/gpio.h
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2.  This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#ifndef __ASM_ARCH_GPIO_H
+#define __ASM_ARCH_GPIO_H
+
+#include <mach/irqs.h>
+#include <plat/gpio.h>
+#include <asm-generic/gpio.h>		/* cansleep wrappers */
+
+extern int mv78xx0_core_index(void);
+
+#define GPIO_MAX		32
+#define GPIO_OUT(pin)		(DEV_BUS_VIRT_BASE + 0x0100)
+#define GPIO_IO_CONF(pin)	(DEV_BUS_VIRT_BASE + 0x0104)
+#define GPIO_BLINK_EN(pin)	(DEV_BUS_VIRT_BASE + 0x0108)
+#define GPIO_IN_POL(pin)	(DEV_BUS_VIRT_BASE + 0x010c)
+#define GPIO_DATA_IN(pin)	(DEV_BUS_VIRT_BASE + 0x0110)
+#define GPIO_EDGE_CAUSE(pin)	(DEV_BUS_VIRT_BASE + 0x0114)
+#define GPIO_MASK_OFF		(mv78xx0_core_index() ? 0x18 : 0)
+#define GPIO_EDGE_MASK(pin)	(DEV_BUS_VIRT_BASE + 0x0118 + GPIO_MASK_OFF)
+#define GPIO_LEVEL_MASK(pin)	(DEV_BUS_VIRT_BASE + 0x011c + GPIO_MASK_OFF)
+
+static inline int gpio_to_irq(int pin)
+{
+	return pin + IRQ_MV78XX0_GPIO_START;
+}
+
+static inline int irq_to_gpio(int irq)
+{
+	return irq - IRQ_MV78XX0_GPIO_START;
+}
+
+
+#endif

arch/arm/mach-mv78xx0/include/mach/irqs.h

@@ -11,8 +11,6 @@
 #ifndef __ASM_ARCH_IRQS_H
 #define __ASM_ARCH_IRQS_H
 
-#include "mv78xx0.h"	/* need GPIO_MAX */
-
 /*
  * MV78xx0 Low Interrupt Controller
  */
@@ -88,7 +86,7 @@
  * MV78XX0 General Purpose Pins
  */
 #define IRQ_MV78XX0_GPIO_START	96
-#define NR_GPIO_IRQS		GPIO_MAX
+#define NR_GPIO_IRQS		32
 
 #define NR_IRQS			(IRQ_MV78XX0_GPIO_START + NR_GPIO_IRQS)
 

arch/arm/mach-mv78xx0/include/mach/mv78xx0.h

@@ -122,7 +122,4 @@
 #define SATA_PHYS_BASE		(MV78XX0_REGS_PHYS_BASE | 0xa0000)
 
 
-#define GPIO_MAX		32
-
-
 #endif

arch/arm/mach-mv78xx0/irq.c

@@ -11,13 +11,42 @@
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/pci.h>
+#include <linux/irq.h>
+#include <asm/gpio.h>
 #include <mach/mv78xx0.h>
 #include <plat/irq.h>
 #include "common.h"
 
+static void gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
+{
+	BUG_ON(irq < IRQ_MV78XX0_GPIO_0_7 || irq > IRQ_MV78XX0_GPIO_24_31);
+
+	orion_gpio_irq_handler((irq - IRQ_MV78XX0_GPIO_0_7) << 3);
+}
+
 void __init mv78xx0_init_irq(void)
 {
+	int i;
+
 	orion_irq_init(0, (void __iomem *)(IRQ_VIRT_BASE + IRQ_MASK_LOW_OFF));
 	orion_irq_init(32, (void __iomem *)(IRQ_VIRT_BASE + IRQ_MASK_HIGH_OFF));
 	orion_irq_init(64, (void __iomem *)(IRQ_VIRT_BASE + IRQ_MASK_ERR_OFF));
+
+	/*
+	 * Mask and clear GPIO IRQ interrupts.
+	 */
+	writel(0, GPIO_LEVEL_MASK(0));
+	writel(0, GPIO_EDGE_MASK(0));
+	writel(0, GPIO_EDGE_CAUSE(0));
+
+	for (i = IRQ_MV78XX0_GPIO_START; i < NR_IRQS; i++) {
+		set_irq_chip(i, &orion_gpio_irq_level_chip);
+		set_irq_handler(i, handle_level_irq);
+		irq_desc[i].status |= IRQ_LEVEL;
+		set_irq_flags(i, IRQF_VALID);
+	}
+	set_irq_chained_handler(IRQ_MV78XX0_GPIO_0_7, gpio_irq_handler);
+	set_irq_chained_handler(IRQ_MV78XX0_GPIO_8_15, gpio_irq_handler);
+	set_irq_chained_handler(IRQ_MV78XX0_GPIO_16_23, gpio_irq_handler);
+	set_irq_chained_handler(IRQ_MV78XX0_GPIO_24_31, gpio_irq_handler);
 }

arch/arm/mach-orion5x/Makefile

-obj-y				+= common.o addr-map.o pci.o gpio.o irq.o mpp.o
+obj-y				+= common.o addr-map.o pci.o irq.o mpp.o
 obj-$(CONFIG_MACH_DB88F5281)	+= db88f5281-setup.o
 obj-$(CONFIG_MACH_RD88F5182)	+= rd88f5182-setup.o
 obj-$(CONFIG_MACH_KUROBOX_PRO)	+= kurobox_pro-setup.o

arch/arm/mach-orion5x/common.h

@@ -51,13 +51,6 @@ int orion5x_pci_sys_setup(int nr, struct pci_sys_data *sys);
 struct pci_bus *orion5x_pci_sys_scan_bus(int nr, struct pci_sys_data *sys);
 int orion5x_pci_map_irq(struct pci_dev *dev, u8 slot, u8 pin);
 
-/*
- * Valid GPIO pins according to MPP setup, used by machine-setup.
- * (/mach-orion/gpio.c).
- */
-void orion5x_gpio_set_valid(unsigned pin, int valid);
-void gpio_display(void);	/* debug */
-
 struct machine_desc;
 struct meminfo;
 struct tag;

arch/arm/mach-orion5x/gpio.c

-/*
- * arch/arm/mach-orion5x/gpio.c
- *
- * GPIO functions for Marvell Orion System On Chip
- *
- * Maintainer: Tzachi Perelstein <tzachi@marvell.com>
- *
- * This file is licensed under the terms of the GNU General Public
- * License version 2.  This program is licensed "as is" without any
- * warranty of any kind, whether express or implied.
- */
-
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/spinlock.h>
-#include <linux/bitops.h>
-#include <linux/io.h>
-#include <asm/gpio.h>
-#include <mach/orion5x.h>
-#include "common.h"
-
-static DEFINE_SPINLOCK(gpio_lock);
-static unsigned long gpio_valid[BITS_TO_LONGS(GPIO_MAX)];
-static const char *gpio_label[GPIO_MAX];  /* non null for allocated GPIOs */
-
-void __init orion5x_gpio_set_valid(unsigned pin, int valid)
-{
-	if (valid)
-		__set_bit(pin, gpio_valid);
-	else
-		__clear_bit(pin, gpio_valid);
-}
-
-/*
- * GENERIC_GPIO primitives
- */
-int gpio_direction_input(unsigned pin)
-{
-	unsigned long flags;
-
-	if (pin >= GPIO_MAX || !test_bit(pin, gpio_valid)) {
-		pr_debug("%s: invalid GPIO %d\n", __func__, pin);
-		return -EINVAL;
-	}
-
-	spin_lock_irqsave(&gpio_lock, flags);
-
-	/*
-	 * Some callers might have not used the gpio_request(),
-	 * so flag this pin as requested now.
-	 */
-	if (!gpio_label[pin])
-		gpio_label[pin] = "?";
-
-	orion5x_setbits(GPIO_IO_CONF, 1 << pin);
-
-	spin_unlock_irqrestore(&gpio_lock, flags);
-	return 0;
-}
-EXPORT_SYMBOL(gpio_direction_input);
-
-int gpio_direction_output(unsigned pin, int value)
-{
-	unsigned long flags;
-	int mask;
-
-	if (pin >= GPIO_MAX || !test_bit(pin, gpio_valid)) {
-		pr_debug("%s: invalid GPIO %d\n", __func__, pin);
-		return -EINVAL;
-	}
-
-	spin_lock_irqsave(&gpio_lock, flags);
-
-	/*
-	 * Some callers might have not used the gpio_request(),
-	 * so flag this pin as requested now.
-	 */
-	if (!gpio_label[pin])
-		gpio_label[pin] = "?";
-
-	mask = 1 << pin;
-	orion5x_clrbits(GPIO_BLINK_EN, mask);
-	if (value)
-		orion5x_setbits(GPIO_OUT, mask);
-	else
-		orion5x_clrbits(GPIO_OUT, mask);
-	orion5x_clrbits(GPIO_IO_CONF, mask);
-
-	spin_unlock_irqrestore(&gpio_lock, flags);
-	return 0;
-}
-EXPORT_SYMBOL(gpio_direction_output);
-
-int gpio_get_value(unsigned pin)
-{
-	int val, mask = 1 << pin;
-
-	if (readl(GPIO_IO_CONF) & mask)
-		val = readl(GPIO_DATA_IN) ^ readl(GPIO_IN_POL);
-	else
-		val = readl(GPIO_OUT);
-
-	return val & mask;
-}
-EXPORT_SYMBOL(gpio_get_value);
-
-void gpio_set_value(unsigned pin, int value)
-{
-	unsigned long flags;
-	int mask = 1 << pin;
-
-	spin_lock_irqsave(&gpio_lock, flags);
-
-	orion5x_clrbits(GPIO_BLINK_EN, mask);
-	if (value)
-		orion5x_setbits(GPIO_OUT, mask);
-	else
-		orion5x_clrbits(GPIO_OUT, mask);
-
-	spin_unlock_irqrestore(&gpio_lock, flags);
-}
-EXPORT_SYMBOL(gpio_set_value);
-
-void orion5x_gpio_set_blink(unsigned pin, int blink)
-{
-	unsigned long flags;
-	int mask = 1 << pin;
-
-	spin_lock_irqsave(&gpio_lock, flags);
-
-	orion5x_clrbits(GPIO_OUT, mask);
-	if (blink)
-		orion5x_setbits(GPIO_BLINK_EN, mask);
-	else
-		orion5x_clrbits(GPIO_BLINK_EN, mask);
-
-	spin_unlock_irqrestore(&gpio_lock, flags);
-}
-EXPORT_SYMBOL(orion5x_gpio_set_blink);
-
-int gpio_request(unsigned pin, const char *label)
-{
-	int ret = 0;
-	unsigned long flags;
-
-	if (pin >= GPIO_MAX || !test_bit(pin, gpio_valid)) {
-		pr_debug("%s: invalid GPIO %d\n", __func__, pin);
-		return -EINVAL;
-	}
-
-	spin_lock_irqsave(&gpio_lock, flags);
-
-	if (gpio_label[pin]) {
-		pr_debug("%s: GPIO %d already used as %s\n",
-			 __func__, pin, gpio_label[pin]);
-		ret = -EBUSY;
-	} else
-		gpio_label[pin] = label ? label : "?";
-
-	spin_unlock_irqrestore(&gpio_lock, flags);
-	return ret;
-}
-EXPORT_SYMBOL(gpio_request);
-
-void gpio_free(unsigned pin)
-{
-	might_sleep();
-
-	if (pin >= GPIO_MAX || !test_bit(pin, gpio_valid)) {
-		pr_debug("%s: invalid GPIO %d\n", __func__, pin);
-		return;
-	}
-
-	if (!gpio_label[pin])
-		pr_warning("%s: GPIO %d already freed\n", __func__, pin);
-	else
-		gpio_label[pin] = NULL;
-}
-EXPORT_SYMBOL(gpio_free);
-
-/* Debug helper */
-void gpio_display(void)
-{
-	int i;
-
-	for (i = 0; i < GPIO_MAX; i++) {
-		printk(KERN_DEBUG "Pin-%d: ", i);
-
-		if (!test_bit(i, gpio_valid)) {
-			printk("non-GPIO\n");
-		} else if (!gpio_label[i]) {
-			printk("GPIO, free\n");
-		} else {
-			printk("GPIO, used by %s, ", gpio_label[i]);
-			if (readl(GPIO_IO_CONF) & (1 << i)) {
-				printk("input, active %s, level %s, edge %s\n",
-				((readl(GPIO_IN_POL) >> i) & 1) ? "low" : "high",
-				((readl(GPIO_LEVEL_MASK) >> i) & 1) ? "enabled" : "masked",
-				((readl(GPIO_EDGE_MASK) >> i) & 1) ? "enabled" : "masked");
-			} else {
-				printk("output, val=%d\n", (readl(GPIO_OUT) >> i) & 1);
-			}
-		}
-	}
-
-	printk(KERN_DEBUG "MPP_0_7_CTRL (0x%08x) = 0x%08x\n",
-				MPP_0_7_CTRL, readl(MPP_0_7_CTRL));
-	printk(KERN_DEBUG "MPP_8_15_CTRL (0x%08x) = 0x%08x\n",
-				MPP_8_15_CTRL, readl(MPP_8_15_CTRL));
-	printk(KERN_DEBUG "MPP_16_19_CTRL (0x%08x) = 0x%08x\n",
-				MPP_16_19_CTRL, readl(MPP_16_19_CTRL));
-	printk(KERN_DEBUG "MPP_DEV_CTRL (0x%08x) = 0x%08x\n",
-				MPP_DEV_CTRL, readl(MPP_DEV_CTRL));
-	printk(KERN_DEBUG "GPIO_OUT (0x%08x) = 0x%08x\n",
-				GPIO_OUT, readl(GPIO_OUT));
-	printk(KERN_DEBUG "GPIO_IO_CONF (0x%08x) = 0x%08x\n",
-				GPIO_IO_CONF, readl(GPIO_IO_CONF));
-	printk(KERN_DEBUG "GPIO_BLINK_EN (0x%08x) = 0x%08x\n",
-				GPIO_BLINK_EN, readl(GPIO_BLINK_EN));
-	printk(KERN_DEBUG "GPIO_IN_POL (0x%08x) = 0x%08x\n",
-				GPIO_IN_POL, readl(GPIO_IN_POL));
-	printk(KERN_DEBUG "GPIO_DATA_IN (0x%08x) = 0x%08x\n",
-				GPIO_DATA_IN, readl(GPIO_DATA_IN));
-	printk(KERN_DEBUG "GPIO_LEVEL_MASK (0x%08x) = 0x%08x\n",
-				GPIO_LEVEL_MASK, readl(GPIO_LEVEL_MASK));
-	printk(KERN_DEBUG "GPIO_EDGE_CAUSE (0x%08x) = 0x%08x\n",
-				GPIO_EDGE_CAUSE, readl(GPIO_EDGE_CAUSE));
-	printk(KERN_DEBUG "GPIO_EDGE_MASK (0x%08x) = 0x%08x\n",
-				GPIO_EDGE_MASK, readl(GPIO_EDGE_MASK));
-}

arch/arm/mach-orion5x/include/mach/gpio.h

@@ -2,18 +2,26 @@
  * arch/arm/mach-orion5x/include/mach/gpio.h
  *
  * This file is licensed under the terms of the GNU General Public
- * License version 2. This program is licensed "as is" without any
+ * License version 2.  This program is licensed "as is" without any
  * warranty of any kind, whether express or implied.
  */
 
-extern int gpio_request(unsigned pin, const char *label);
-extern void gpio_free(unsigned pin);
-extern int gpio_direction_input(unsigned pin);
-extern int gpio_direction_output(unsigned pin, int value);
-extern int gpio_get_value(unsigned pin);
-extern void gpio_set_value(unsigned pin, int value);
-extern void orion5x_gpio_set_blink(unsigned pin, int blink);
-extern void gpio_display(void);		/* debug */
+#ifndef __ASM_ARCH_GPIO_H
+#define __ASM_ARCH_GPIO_H
+
+#include <mach/irqs.h>
+#include <plat/gpio.h>
+#include <asm-generic/gpio.h>		/* cansleep wrappers */
+
+#define GPIO_MAX		32
+#define GPIO_OUT(pin)		ORION5X_DEV_BUS_REG(0x100)
+#define GPIO_IO_CONF(pin)	ORION5X_DEV_BUS_REG(0x104)
+#define GPIO_BLINK_EN(pin)	ORION5X_DEV_BUS_REG(0x108)
+#define GPIO_IN_POL(pin)	ORION5X_DEV_BUS_REG(0x10c)
+#define GPIO_DATA_IN(pin)	ORION5X_DEV_BUS_REG(0x110)
+#define GPIO_EDGE_CAUSE(pin)	ORION5X_DEV_BUS_REG(0x114)
+#define GPIO_EDGE_MASK(pin)	ORION5X_DEV_BUS_REG(0x118)
+#define GPIO_LEVEL_MASK(pin)	ORION5X_DEV_BUS_REG(0x11c)
 
 static inline int gpio_to_irq(int pin)
 {
@@ -25,4 +33,5 @@ static inline int irq_to_gpio(int irq)
 	return irq - IRQ_ORION5X_GPIO_START;
 }
 
-#include <asm-generic/gpio.h>		/* cansleep wrappers */
+
+#endif

arch/arm/mach-orion5x/include/mach/irqs.h

@@ -13,8 +13,6 @@
 #ifndef __ASM_ARCH_IRQS_H
 #define __ASM_ARCH_IRQS_H
 
-#include "orion5x.h"	/* need GPIO_MAX */
-
 /*
  * Orion Main Interrupt Controller
  */
@@ -54,7 +52,7 @@
  * Orion General Purpose Pins
  */
 #define IRQ_ORION5X_GPIO_START	32
-#define NR_GPIO_IRQS		GPIO_MAX
+#define NR_GPIO_IRQS		32
 
 #define NR_IRQS			(IRQ_ORION5X_GPIO_START + NR_GPIO_IRQS)
 

arch/arm/mach-orion5x/include/mach/orion5x.h

@@ -134,14 +134,6 @@
 #define MPP_16_19_CTRL		ORION5X_DEV_BUS_REG(0x050)
 #define MPP_DEV_CTRL		ORION5X_DEV_BUS_REG(0x008)
 #define MPP_RESET_SAMPLE	ORION5X_DEV_BUS_REG(0x010)
-#define GPIO_OUT		ORION5X_DEV_BUS_REG(0x100)
-#define GPIO_IO_CONF		ORION5X_DEV_BUS_REG(0x104)
-#define GPIO_BLINK_EN		ORION5X_DEV_BUS_REG(0x108)
-#define GPIO_IN_POL		ORION5X_DEV_BUS_REG(0x10c)
-#define GPIO_DATA_IN		ORION5X_DEV_BUS_REG(0x110)
-#define GPIO_EDGE_CAUSE		ORION5X_DEV_BUS_REG(0x114)
-#define GPIO_EDGE_MASK		ORION5X_DEV_BUS_REG(0x118)
-#define GPIO_LEVEL_MASK		ORION5X_DEV_BUS_REG(0x11c)
 #define DEV_BANK_0_PARAM	ORION5X_DEV_BUS_REG(0x45c)
 #define DEV_BANK_1_PARAM	ORION5X_DEV_BUS_REG(0x460)
 #define DEV_BANK_2_PARAM	ORION5X_DEV_BUS_REG(0x464)
@@ -149,7 +141,6 @@
 #define DEV_BUS_CTRL		ORION5X_DEV_BUS_REG(0x4c0)
 #define DEV_BUS_INT_CAUSE	ORION5X_DEV_BUS_REG(0x4d0)
 #define DEV_BUS_INT_MASK	ORION5X_DEV_BUS_REG(0x4d4)
-#define GPIO_MAX		32
 
 /***************************************************************************
  * Orion CPU Bridge Registers

arch/arm/mach-orion5x/irq.c

@@ -19,193 +19,38 @@
 #include <plat/irq.h>
 #include "common.h"
 
-/*****************************************************************************
- * Orion GPIO IRQ
- *
- * GPIO_IN_POL register controlls whether GPIO_DATA_IN will hold the same
- * value of the line or the opposite value.
- *
- * Level IRQ handlers: DATA_IN is used directly as cause register.
- *                     Interrupt are masked by LEVEL_MASK registers.
- * Edge IRQ handlers:  Change in DATA_IN are latched in EDGE_CAUSE.
- *                     Interrupt are masked by EDGE_MASK registers.
- * Both-edge handlers: Similar to regular Edge handlers, but also swaps
- *                     the polarity to catch the next line transaction.
- *                     This is a race condition that might not perfectly
- *                     work on some use cases.
- *
- * Every eight GPIO lines are grouped (OR'ed) before going up to main
- * cause register.
- *
- *                    EDGE  cause    mask
- *        data-in   /--------| |-----| |----\
- *     -----| |-----                         ---- to main cause reg
- *           X      \----------------| |----/
- *        polarity    LEVEL          mask
- *
- ****************************************************************************/
-static void orion5x_gpio_irq_ack(u32 irq)
-{
-	int pin = irq_to_gpio(irq);
-	if (irq_desc[irq].status & IRQ_LEVEL)
-		/*
-		 * Mask bit for level interrupt
-		 */
-		orion5x_clrbits(GPIO_LEVEL_MASK, 1 << pin);
-	else
-		/*
-		 * Clear casue bit for egde interrupt
-		 */
-		orion5x_clrbits(GPIO_EDGE_CAUSE, 1 << pin);
-}
-
-static void orion5x_gpio_irq_mask(u32 irq)
-{
-	int pin = irq_to_gpio(irq);
-	if (irq_desc[irq].status & IRQ_LEVEL)
-		orion5x_clrbits(GPIO_LEVEL_MASK, 1 << pin);
-	else
-		orion5x_clrbits(GPIO_EDGE_MASK, 1 << pin);
-}
-
-static void orion5x_gpio_irq_unmask(u32 irq)
+static void gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
 {
-	int pin = irq_to_gpio(irq);
-	if (irq_desc[irq].status & IRQ_LEVEL)
-		orion5x_setbits(GPIO_LEVEL_MASK, 1 << pin);
-	else
-		orion5x_setbits(GPIO_EDGE_MASK, 1 << pin);
-}
-
-static int orion5x_gpio_set_irq_type(u32 irq, u32 type)
-{
-	int pin = irq_to_gpio(irq);
-	struct irq_desc *desc;
-
-	if ((readl(GPIO_IO_CONF) & (1 << pin)) == 0) {
-		printk(KERN_ERR "orion5x_gpio_set_irq_type failed "
-				"(irq %d, pin %d).\n", irq, pin);
-		return -EINVAL;
-	}
-
-	desc = irq_desc + irq;
-
-	switch (type) {
-	case IRQ_TYPE_LEVEL_HIGH:
-		desc->handle_irq = handle_level_irq;
-		desc->status |= IRQ_LEVEL;
-		orion5x_clrbits(GPIO_IN_POL, (1 << pin));
-		break;
-	case IRQ_TYPE_LEVEL_LOW:
-		desc->handle_irq = handle_level_irq;
-		desc->status |= IRQ_LEVEL;
-		orion5x_setbits(GPIO_IN_POL, (1 << pin));
-		break;
-	case IRQ_TYPE_EDGE_RISING:
-		desc->handle_irq = handle_edge_irq;
-		desc->status &= ~IRQ_LEVEL;
-		orion5x_clrbits(GPIO_IN_POL, (1 << pin));
-		break;
-	case IRQ_TYPE_EDGE_FALLING:
-		desc->handle_irq = handle_edge_irq;
-		desc->status &= ~IRQ_LEVEL;
-		orion5x_setbits(GPIO_IN_POL, (1 << pin));
-		break;
-	case IRQ_TYPE_EDGE_BOTH:
-		desc->handle_irq = handle_edge_irq;
-		desc->status &= ~IRQ_LEVEL;
-		/*
-		 * set initial polarity based on current input level
-		 */
-		if ((readl(GPIO_IN_POL) ^ readl(GPIO_DATA_IN))
-		    & (1 << pin))
-			orion5x_setbits(GPIO_IN_POL, (1 << pin)); /* falling */
-		else
-			orion5x_clrbits(GPIO_IN_POL, (1 << pin)); /* rising */
-
-		break;
-	default:
-		printk(KERN_ERR "failed to set irq=%d (type=%d)\n", irq, type);
-		return -EINVAL;
-	}
-
-	desc->status &= ~IRQ_TYPE_SENSE_MASK;
-	desc->status |= type & IRQ_TYPE_SENSE_MASK;
-
-	return 0;
-}
-
-static struct irq_chip orion5x_gpio_irq_chip = {
-	.name		= "Orion-IRQ-GPIO",
-	.ack		= orion5x_gpio_irq_ack,
-	.mask		= orion5x_gpio_irq_mask,
-	.unmask		= orion5x_gpio_irq_unmask,
-	.set_type	= orion5x_gpio_set_irq_type,
-};
-
-static void orion5x_gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
-{
-	u32 cause, offs, pin;
-
 	BUG_ON(irq < IRQ_ORION5X_GPIO_0_7 || irq > IRQ_ORION5X_GPIO_24_31);
-	offs = (irq - IRQ_ORION5X_GPIO_0_7) * 8;
-	cause = (readl(GPIO_DATA_IN) & readl(GPIO_LEVEL_MASK)) |
-		(readl(GPIO_EDGE_CAUSE) & readl(GPIO_EDGE_MASK));
 
-	for (pin = offs; pin < offs + 8; pin++) {
-		if (cause & (1 << pin)) {
-			irq = gpio_to_irq(pin);
-			desc = irq_desc + irq;
-			if ((desc->status & IRQ_TYPE_SENSE_MASK) == IRQ_TYPE_EDGE_BOTH) {
-				/* Swap polarity (race with GPIO line) */
-				u32 polarity = readl(GPIO_IN_POL);
-				polarity ^= 1 << pin;
-				writel(polarity, GPIO_IN_POL);
-			}
-			generic_handle_irq(irq);
-		}
-	}
+	orion_gpio_irq_handler((irq - IRQ_ORION5X_GPIO_0_7) << 3);
 }
 
-static void __init orion5x_init_gpio_irq(void)
+void __init orion5x_init_irq(void)
 {
 	int i;
-	struct irq_desc *desc;
+
+	orion_irq_init(0, (void __iomem *)MAIN_IRQ_MASK);
 
 	/*
 	 * Mask and clear GPIO IRQ interrupts
 	 */
-	writel(0x0, GPIO_LEVEL_MASK);
-	writel(0x0, GPIO_EDGE_MASK);
-	writel(0x0, GPIO_EDGE_CAUSE);
+	writel(0x0, GPIO_LEVEL_MASK(0));
+	writel(0x0, GPIO_EDGE_MASK(0));
+	writel(0x0, GPIO_EDGE_CAUSE(0));
 
 	/*
 	 * Register chained level handlers for GPIO IRQs by default.
 	 * User can use set_type() if he wants to use edge types handlers.
 	 */
 	for (i = IRQ_ORION5X_GPIO_START; i < NR_IRQS; i++) {
-		set_irq_chip(i, &orion5x_gpio_irq_chip);
+		set_irq_chip(i, &orion_gpio_irq_level_chip);
 		set_irq_handler(i, handle_level_irq);
-		desc = irq_desc + i;
-		desc->status |= IRQ_LEVEL;
+		irq_desc[i].status |= IRQ_LEVEL;
 		set_irq_flags(i, IRQF_VALID);
 	}
-	set_irq_chained_handler(IRQ_ORION5X_GPIO_0_7, orion5x_gpio_irq_handler);
-	set_irq_chained_handler(IRQ_ORION5X_GPIO_8_15, orion5x_gpio_irq_handler);
-	set_irq_chained_handler(IRQ_ORION5X_GPIO_16_23, orion5x_gpio_irq_handler);
-	set_irq_chained_handler(IRQ_ORION5X_GPIO_24_31, orion5x_gpio_irq_handler);
-}
-
-/*****************************************************************************
- * Orion Main IRQ
- ****************************************************************************/
-static void __init orion5x_init_main_irq(void)
-{
-	orion_irq_init(0, (void __iomem *)MAIN_IRQ_MASK);
-}
-
-void __init orion5x_init_irq(void)
-{
-	orion5x_init_main_irq();
-	orion5x_init_gpio_irq();
+	set_irq_chained_handler(IRQ_ORION5X_GPIO_0_7, gpio_irq_handler);
+	set_irq_chained_handler(IRQ_ORION5X_GPIO_8_15, gpio_irq_handler);
+	set_irq_chained_handler(IRQ_ORION5X_GPIO_16_23, gpio_irq_handler);
+	set_irq_chained_handler(IRQ_ORION5X_GPIO_24_31, gpio_irq_handler);
 }

arch/arm/mach-orion5x/mpp.c

@@ -12,6 +12,7 @@
 #include <linux/init.h>
 #include <linux/mbus.h>
 #include <linux/io.h>
+#include <asm/gpio.h>
 #include <mach/hardware.h>
 #include "common.h"
 #include "mpp.h"
@@ -152,7 +153,10 @@ void __init orion5x_mpp_conf(struct orion5x_mpp_mode *mode)
 		*reg &= ~(0xf << shift);
 		*reg |= (num_type & 0xf) << shift;
 
-		orion5x_gpio_set_valid(mode->mpp, !!(mode->type == MPP_GPIO));
+		if (mode->type == MPP_UNUSED && (mode->mpp < 16 || is_5182()))
+			orion_gpio_set_unused(mode->mpp);
+
+		orion_gpio_set_valid(mode->mpp, !!(mode->type == MPP_GPIO));
 
 		mode++;
 	}

arch/arm/plat-orion/Makefile

@@ -6,3 +6,5 @@ obj-y	:= irq.o pcie.o time.o
 obj-m	:=
 obj-n	:=
 obj-	:=
+
+obj-$(CONFIG_GENERIC_GPIO) += gpio.o

arch/arm/plat-orion/gpio.c

+/*
+ * arch/arm/plat-orion/gpio.c
+ *
+ * Marvell Orion SoC GPIO handling.
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2.  This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/irq.h>
+#include <linux/module.h>
+#include <linux/spinlock.h>
+#include <linux/bitops.h>
+#include <linux/io.h>
+#include <asm/gpio.h>
+
+static DEFINE_SPINLOCK(gpio_lock);
+static const char *gpio_label[GPIO_MAX];  /* non null for allocated GPIOs */
+static unsigned long gpio_valid[BITS_TO_LONGS(GPIO_MAX)];
+
+static inline void __set_direction(unsigned pin, int input)
+{
+	u32 u;
+
+	u = readl(GPIO_IO_CONF(pin));
+	if (input)
+		u |= 1 << (pin & 31);
+	else
+		u &= ~(1 << (pin & 31));
+	writel(u, GPIO_IO_CONF(pin));
+}
+
+static void __set_level(unsigned pin, int high)
+{
+	u32 u;
+
+	u = readl(GPIO_OUT(pin));
+	if (high)
+		u |= 1 << (pin & 31);
+	else
+		u &= ~(1 << (pin & 31));
+	writel(u, GPIO_OUT(pin));
+}
+
+
+/*
+ * GENERIC_GPIO primitives.
+ */
+int gpio_direction_input(unsigned pin)
+{
+	unsigned long flags;
+
+	if (pin >= GPIO_MAX || !test_bit(pin, gpio_valid)) {
+		pr_debug("%s: invalid GPIO %d\n", __func__, pin);
+		return -EINVAL;
+	}
+
+	spin_lock_irqsave(&gpio_lock, flags);
+
+	/*
+	 * Some callers might not have used gpio_request(),
+	 * so flag this pin as requested now.
+	 */
+	if (gpio_label[pin] == NULL)
+		gpio_label[pin] = "?";
+
+	/*
+	 * Configure GPIO direction.
+	 */
+	__set_direction(pin, 1);
+
+	spin_unlock_irqrestore(&gpio_lock, flags);
+
+	return 0;
+}
+EXPORT_SYMBOL(gpio_direction_input);
+
+int gpio_direction_output(unsigned pin, int value)
+{
+	unsigned long flags;
+	u32 u;
+
+	if (pin >= GPIO_MAX || !test_bit(pin, gpio_valid)) {
+		pr_debug("%s: invalid GPIO %d\n", __func__, pin);
+		return -EINVAL;
+	}
+
+	spin_lock_irqsave(&gpio_lock, flags);
+
+	/*
+	 * Some callers might not have used gpio_request(),
+	 * so flag this pin as requested now.
+	 */
+	if (gpio_label[pin] == NULL)
+		gpio_label[pin] = "?";
+
+	/*
+	 * Disable blinking.
+	 */
+	u = readl(GPIO_BLINK_EN(pin));
+	u &= ~(1 << (pin & 31));
+	writel(u, GPIO_BLINK_EN(pin));
+
+	/*
+	 * Configure GPIO output value.
+	 */
+	__set_level(pin, value);
+
+	/*
+	 * Configure GPIO direction.
+	 */
+	__set_direction(pin, 0);
+
+	spin_unlock_irqrestore(&gpio_lock, flags);
+
+	return 0;
+}
+EXPORT_SYMBOL(gpio_direction_output);
+
+int gpio_get_value(unsigned pin)
+{
+	int val;
+
+	if (readl(GPIO_IO_CONF(pin)) & (1 << (pin & 31)))
+		val = readl(GPIO_DATA_IN(pin)) ^ readl(GPIO_IN_POL(pin));
+	else
+		val = readl(GPIO_OUT(pin));
+
+	return (val >> (pin & 31)) & 1;
+}
+EXPORT_SYMBOL(gpio_get_value);
+
+void gpio_set_value(unsigned pin, int value)
+{
+	unsigned long flags;
+	u32 u;
+
+	spin_lock_irqsave(&gpio_lock, flags);
+
+	/*
+	 * Disable blinking.
+	 */
+	u = readl(GPIO_BLINK_EN(pin));
+	u &= ~(1 << (pin & 31));
+	writel(u, GPIO_BLINK_EN(pin));
+
+	/*
+	 * Configure GPIO output value.
+	 */
+	__set_level(pin, value);
+
+	spin_unlock_irqrestore(&gpio_lock, flags);
+}
+EXPORT_SYMBOL(gpio_set_value);
+
+int gpio_request(unsigned pin, const char *label)
+{
+	unsigned long flags;
+	int ret;
+
+	if (pin >= GPIO_MAX || !test_bit(pin, gpio_valid)) {
+		pr_debug("%s: invalid GPIO %d\n", __func__, pin);
+		return -EINVAL;
+	}
+
+	spin_lock_irqsave(&gpio_lock, flags);
+	if (gpio_label[pin] == NULL) {
+		gpio_label[pin] = label ? label : "?";
+		ret = 0;
+	} else {
+		pr_debug("%s: GPIO %d already used as %s\n",
+			 __func__, pin, gpio_label[pin]);
+		ret = -EBUSY;
+	}
+	spin_unlock_irqrestore(&gpio_lock, flags);
+
+	return ret;
+}
+EXPORT_SYMBOL(gpio_request);
+
+void gpio_free(unsigned pin)
+{
+	if (pin >= GPIO_MAX || !test_bit(pin, gpio_valid)) {
+		pr_debug("%s: invalid GPIO %d\n", __func__, pin);
+		return;
+	}
+
+	if (gpio_label[pin] == NULL)
+		pr_warning("%s: GPIO %d already freed\n", __func__, pin);
+	else
+		gpio_label[pin] = NULL;
+}
+EXPORT_SYMBOL(gpio_free);
+
+
+/*
+ * Orion-specific GPIO API extensions.
+ */
+void __init orion_gpio_set_unused(unsigned pin)
+{
+	/*
+	 * Configure as output, drive low.
+	 */
+	__set_level(pin, 0);
+	__set_direction(pin, 0);
+}
+
+void __init orion_gpio_set_valid(unsigned pin, int valid)
+{
+	if (valid)
+		__set_bit(pin, gpio_valid);
+	else
+		__clear_bit(pin, gpio_valid);
+}
+
+void orion_gpio_set_blink(unsigned pin, int blink)
+{
+	unsigned long flags;
+	u32 u;
+
+	spin_lock_irqsave(&gpio_lock, flags);
+
+	/*
+	 * Set output value to zero.
+	 */
+	__set_level(pin, 0);
+
+	u = readl(GPIO_BLINK_EN(pin));
+	if (blink)
+		u |= 1 << (pin & 31);
+	else
+		u &= ~(1 << (pin & 31));
+	writel(u, GPIO_BLINK_EN(pin));
+
+	spin_unlock_irqrestore(&gpio_lock, flags);
+}
+EXPORT_SYMBOL(orion_gpio_set_blink);
+
+
+/*****************************************************************************
+ * Orion GPIO IRQ
+ *
+ * GPIO_IN_POL register controls whether GPIO_DATA_IN will hold the same
+ * value of the line or the opposite value.
+ *
+ * Level IRQ handlers: DATA_IN is used directly as cause register.
+ *                     Interrupt are masked by LEVEL_MASK registers.
+ * Edge IRQ handlers:  Change in DATA_IN are latched in EDGE_CAUSE.
+ *                     Interrupt are masked by EDGE_MASK registers.
+ * Both-edge handlers: Similar to regular Edge handlers, but also swaps
+ *                     the polarity to catch the next line transaction.
+ *                     This is a race condition that might not perfectly
+ *                     work on some use cases.
+ *
+ * Every eight GPIO lines are grouped (OR'ed) before going up to main
+ * cause register.
+ *
+ *                    EDGE  cause    mask
+ *        data-in   /--------| |-----| |----\
+ *     -----| |-----                         ---- to main cause reg
+ *           X      \----------------| |----/
+ *        polarity    LEVEL          mask
+ *
+ ****************************************************************************/
+static void gpio_irq_edge_ack(u32 irq)
+{
+	int pin = irq_to_gpio(irq);
+
+	writel(~(1 << (pin & 31)), GPIO_EDGE_CAUSE(pin));
+}
+
+static void gpio_irq_edge_mask(u32 irq)
+{
+	int pin = irq_to_gpio(irq);
+	u32 u;
+
+	u = readl(GPIO_EDGE_MASK(pin));
+	u &= ~(1 << (pin & 31));
+	writel(u, GPIO_EDGE_MASK(pin));
+}
+
+static void gpio_irq_edge_unmask(u32 irq)
+{
+	int pin = irq_to_gpio(irq);
+	u32 u;
+
+	u = readl(GPIO_EDGE_MASK(pin));
+	u |= 1 << (pin & 31);
+	writel(u, GPIO_EDGE_MASK(pin));
+}
+
+static void gpio_irq_level_mask(u32 irq)
+{
+	int pin = irq_to_gpio(irq);
+	u32 u;
+
+	u = readl(GPIO_LEVEL_MASK(pin));
+	u &= ~(1 << (pin & 31));
+	writel(u, GPIO_LEVEL_MASK(pin));
+}
+
+static void gpio_irq_level_unmask(u32 irq)
+{
+	int pin = irq_to_gpio(irq);
+	u32 u;
+
+	u = readl(GPIO_LEVEL_MASK(pin));
+	u |= 1 << (pin & 31);
+	writel(u, GPIO_LEVEL_MASK(pin));
+}
+
+static int gpio_irq_set_type(u32 irq, u32 type)
+{
+	int pin = irq_to_gpio(irq);
+	struct irq_desc *desc;
+	u32 u;
+
+	u = readl(GPIO_IO_CONF(pin)) & (1 << (pin & 31));
+	if (!u) {
+		printk(KERN_ERR "orion gpio_irq_set_type failed "
+				"(irq %d, pin %d).\n", irq, pin);
+		return -EINVAL;
+	}
+
+	desc = irq_desc + irq;
+
+	/*
+	 * Set edge/level type.
+	 */
+	if (type & (IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING)) {
+		desc->chip = &orion_gpio_irq_edge_chip;
+	} else if (type & (IRQ_TYPE_LEVEL_HIGH | IRQ_TYPE_LEVEL_LOW)) {
+		desc->chip = &orion_gpio_irq_level_chip;
+	} else {
+		printk(KERN_ERR "failed to set irq=%d (type=%d)\n", irq, type);
+		return -EINVAL;
+	}
+
+	/*
+	 * Configure interrupt polarity.
+	 */
+	if (type == IRQ_TYPE_EDGE_RISING || type == IRQ_TYPE_LEVEL_HIGH) {
+		u = readl(GPIO_IN_POL(pin));
+		u &= ~(1 << (pin & 31));
+		writel(u, GPIO_IN_POL(pin));
+	} else if (type == IRQ_TYPE_EDGE_FALLING || type == IRQ_TYPE_LEVEL_LOW) {
+		u = readl(GPIO_IN_POL(pin));
+		u |= 1 << (pin & 31);
+		writel(u, GPIO_IN_POL(pin));
+	} else if (type == IRQ_TYPE_EDGE_BOTH) {
+		u32 v;
+
+		v = readl(GPIO_IN_POL(pin)) ^ readl(GPIO_DATA_IN(pin));
+
+		/*
+		 * set initial polarity based on current input level
+		 */
+		u = readl(GPIO_IN_POL(pin));
+		if (v & (1 << (pin & 31)))
+			u |= 1 << (pin & 31);		/* falling */
+		else
+			u &= ~(1 << (pin & 31));	/* rising */
+		writel(u, GPIO_IN_POL(pin));
+	}
+
+	desc->status = (desc->status & ~IRQ_TYPE_SENSE_MASK) | type;
+
+	return 0;
+}
+
+struct irq_chip orion_gpio_irq_edge_chip = {
+	.name		= "orion_gpio_irq_edge",
+	.ack		= gpio_irq_edge_ack,
+	.mask		= gpio_irq_edge_mask,
+	.unmask		= gpio_irq_edge_unmask,
+	.set_type	= gpio_irq_set_type,
+};
+
+struct irq_chip orion_gpio_irq_level_chip = {
+	.name		= "orion_gpio_irq_level",
+	.mask		= gpio_irq_level_mask,
+	.mask_ack	= gpio_irq_level_mask,
+	.unmask		= gpio_irq_level_unmask,
+	.set_type	= gpio_irq_set_type,
+};
+
+void orion_gpio_irq_handler(int pinoff)
+{
+	u32 cause;
+	int pin;
+
+	cause = readl(GPIO_DATA_IN(pinoff)) & readl(GPIO_LEVEL_MASK(pinoff));
+	cause |= readl(GPIO_EDGE_CAUSE(pinoff)) & readl(GPIO_EDGE_MASK(pinoff));
+
+	for (pin = pinoff; pin < pinoff + 8; pin++) {
+		int irq = gpio_to_irq(pin);
+		struct irq_desc *desc = irq_desc + irq;
+
+		if (!(cause & (1 << (pin & 31))))
+			continue;
+
+		if ((desc->status & IRQ_TYPE_SENSE_MASK) == IRQ_TYPE_EDGE_BOTH) {
+			/* Swap polarity (race with GPIO line) */
+			u32 polarity;
+
+			polarity = readl(GPIO_IN_POL(pin));
+			polarity ^= 1 << (pin & 31);
+			writel(polarity, GPIO_IN_POL(pin));
+		}
+		desc_handle_irq(irq, desc);
+	}
+}

arch/arm/plat-orion/include/plat/gpio.h

+/*
+ * arch/arm/plat-orion/include/plat/gpio.h
+ *
+ * Marvell Orion SoC GPIO handling.
+ *
+ * This file is licensed under the terms of the GNU General Public
+ * License version 2.  This program is licensed "as is" without any
+ * warranty of any kind, whether express or implied.
+ */
+
+#ifndef __PLAT_GPIO_H
+#define __PLAT_GPIO_H
+
+/*
+ * GENERIC_GPIO primitives.
+ */
+int gpio_request(unsigned pin, const char *label);
+void gpio_free(unsigned pin);
+int gpio_direction_input(unsigned pin);
+int gpio_direction_output(unsigned pin, int value);
+int gpio_get_value(unsigned pin);
+void gpio_set_value(unsigned pin, int value);
+
+/*
+ * Orion-specific GPIO API extensions.
+ */
+void orion_gpio_set_unused(unsigned pin);
+void orion_gpio_set_valid(unsigned pin, int valid);
+void orion_gpio_set_blink(unsigned pin, int blink);
+
+/*
+ * GPIO interrupt handling.
+ */
+extern struct irq_chip orion_gpio_irq_edge_chip;
+extern struct irq_chip orion_gpio_irq_level_chip;
+void orion_gpio_irq_handler(int irqoff);
+
+
+#endif