1 files changed, 31 insertions, 32 deletions

diff --git a/arch/arm/mach-davinci/gpio.c b/arch/arm/mach-davinci/gpio.c
index 1aba41c6351..1b6532159c5 100644
--- a/arch/arm/mach-davinci/gpio.c
+++ b/arch/arm/mach-davinci/gpio.c
@@ -23,6 +23,7 @@
 #include <mach/cputype.h>
 #include <mach/irqs.h>
 #include <mach/hardware.h>
+#include <mach/common.h>
 #include <mach/gpio.h>
 
 #include <asm/mach/irq.h>
@@ -37,14 +38,13 @@ struct davinci_gpio {
 
 static struct davinci_gpio chips[DIV_ROUND_UP(DAVINCI_N_GPIO, 32)];
 
-static unsigned __initdata ngpio;
-
 /* create a non-inlined version */
 static struct gpio_controller __iomem * __init gpio2controller(unsigned gpio)
 {
 	return __gpio_to_controller(gpio);
 }
 
+static int __init davinci_gpio_irq_setup(void);
 
 /*--------------------------------------------------------------------------*/
 
@@ -115,23 +115,16 @@ davinci_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
 static int __init davinci_gpio_setup(void)
 {
 	int i, base;
+	unsigned ngpio;
+	struct davinci_soc_info *soc_info = &davinci_soc_info;
 
-	/* The gpio banks conceptually expose a segmented bitmap,
+	/*
+	 * The gpio banks conceptually expose a segmented bitmap,
 	 * and "ngpio" is one more than the largest zero-based
 	 * bit index that's valid.
 	 */
-	if (cpu_is_davinci_dm355()) {		/* or dm335() */
-		ngpio = 104;
-	} else if (cpu_is_davinci_dm644x()) {	/* or dm337() */
-		ngpio = 71;
-	} else if (cpu_is_davinci_dm646x()) {
-		/* NOTE:  each bank has several "reserved" bits,
-		 * unusable as GPIOs.  Only 33 of the GPIO numbers
-		 * are usable, and we're not rejecting the others.
-		 */
-		ngpio = 43;
-	} else {
-		/* if cpu_is_davinci_dm643x() ngpio = 111 */
+	ngpio = soc_info->gpio_num;
+	if (ngpio == 0) {
 		pr_err("GPIO setup:  how many GPIOs?\n");
 		return -EINVAL;
 	}
@@ -157,6 +150,7 @@ static int __init davinci_gpio_setup(void)
 		gpiochip_add(&chips[i].chip);
 	}
 
+	davinci_gpio_irq_setup();
 	return 0;
 }
 pure_initcall(davinci_gpio_setup);
@@ -187,10 +181,15 @@ static void gpio_irq_enable(unsigned irq)
 {
 	struct gpio_controller *__iomem g = get_irq_chip_data(irq);
 	u32 mask = __gpio_mask(irq_to_gpio(irq));
+	unsigned status = irq_desc[irq].status;
+
+	status &= IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_EDGE_RISING;
+	if (!status)
+		status = IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_EDGE_RISING;
 
-	if (irq_desc[irq].status & IRQ_TYPE_EDGE_FALLING)
+	if (status & IRQ_TYPE_EDGE_FALLING)
 		__raw_writel(mask, &g->set_falling);
-	if (irq_desc[irq].status & IRQ_TYPE_EDGE_RISING)
+	if (status & IRQ_TYPE_EDGE_RISING)
 		__raw_writel(mask, &g->set_rising);
 }
 
@@ -205,10 +204,13 @@ static int gpio_irq_type(unsigned irq, unsigned trigger)
 	irq_desc[irq].status &= ~IRQ_TYPE_SENSE_MASK;
 	irq_desc[irq].status |= trigger;
 
-	__raw_writel(mask, (trigger & IRQ_TYPE_EDGE_FALLING)
-		     ? &g->set_falling : &g->clr_falling);
-	__raw_writel(mask, (trigger & IRQ_TYPE_EDGE_RISING)
-		     ? &g->set_rising : &g->clr_rising);
+	/* don't enable the IRQ if it's currently disabled */
+	if (irq_desc[irq].depth == 0) {
+		__raw_writel(mask, (trigger & IRQ_TYPE_EDGE_FALLING)
+			     ? &g->set_falling : &g->clr_falling);
+		__raw_writel(mask, (trigger & IRQ_TYPE_EDGE_RISING)
+			     ? &g->set_rising : &g->clr_rising);
+	}
 	return 0;
 }
 
@@ -230,6 +232,7 @@ gpio_irq_handler(unsigned irq, struct irq_desc *desc)
 		mask <<= 16;
 
 	/* temporarily mask (level sensitive) parent IRQ */
+	desc->chip->mask(irq);
 	desc->chip->ack(irq);
 	while (1) {
 		u32		status;
@@ -268,17 +271,15 @@ gpio_irq_handler(unsigned irq, struct irq_desc *desc)
 static int __init davinci_gpio_irq_setup(void)
 {
 	unsigned	gpio, irq, bank;
-	unsigned	bank_irq;
 	struct clk	*clk;
 	u32		binten = 0;
+	unsigned	ngpio, bank_irq;
+	struct davinci_soc_info *soc_info = &davinci_soc_info;
+
+	ngpio = soc_info->gpio_num;
 
-	if (cpu_is_davinci_dm355()) {		/* or dm335() */
-		bank_irq = IRQ_DM355_GPIOBNK0;
-	} else if (cpu_is_davinci_dm644x()) {
-		bank_irq = IRQ_GPIOBNK0;
-	} else if (cpu_is_davinci_dm646x()) {
-		bank_irq = IRQ_DM646X_GPIOBNK0;
-	} else {
+	bank_irq = soc_info->gpio_irq;
+	if (bank_irq == 0) {
 		printk(KERN_ERR "Don't know first GPIO bank IRQ.\n");
 		return -EINVAL;
 	}
@@ -318,11 +319,9 @@ static int __init davinci_gpio_irq_setup(void)
 	/* BINTEN -- per-bank interrupt enable. genirq would also let these
 	 * bits be set/cleared dynamically.
 	 */
-	__raw_writel(binten, (void *__iomem)
-		     IO_ADDRESS(DAVINCI_GPIO_BASE + 0x08));
+	__raw_writel(binten, soc_info->gpio_base + 0x08);
 
 	printk(KERN_INFO "DaVinci: %d gpio irqs\n", irq - gpio_to_irq(0));
 
 	return 0;
 }
-arch_initcall(davinci_gpio_irq_setup);