[ARM] pxa: move IRQ handling of GPIO 0 and 1 outside of gpio.c
This is part of the work making gpio.c generic enough, the changes
include:
1. move IRQ handling of GPIO 0 and 1 outside (and back into irq.c)
2. pxa_init_gpio() accepts a range for muxed GPIO IRQs, and an IRQ
number for the muxed GPIOs
3. __gpio_is_occupied() and __gpio_is_inverted() are made inline,
and are moved into <mach/gpio.h> instead of generic gpio.c
Signed-off-by: Eric Miao <eric.miao@marvell.com>
diff --git a/arch/arm/mach-pxa/irq.c b/arch/arm/mach-pxa/irq.c
index fa69c3a..d3d40a3 100644
--- a/arch/arm/mach-pxa/irq.c
+++ b/arch/arm/mach-pxa/irq.c
@@ -21,6 +21,7 @@
#include <asm/irq.h>
#include <asm/mach/irq.h>
#include <mach/pxa-regs.h>
+#include <mach/gpio.h>
#include "generic.h"
@@ -51,6 +52,72 @@
.unmask = pxa_unmask_irq,
};
+/*
+ * GPIO IRQs for GPIO 0 and 1
+ */
+static int pxa_set_low_gpio_type(unsigned int irq, unsigned int type)
+{
+ int gpio = irq - IRQ_GPIO0;
+
+ if (__gpio_is_occupied(gpio)) {
+ pr_err("%s failed: GPIO is configured\n", __func__);
+ return -EINVAL;
+ }
+
+ if (type & IRQ_TYPE_EDGE_RISING)
+ GRER0 |= GPIO_bit(gpio);
+ else
+ GRER0 &= ~GPIO_bit(gpio);
+
+ if (type & IRQ_TYPE_EDGE_FALLING)
+ GFER0 |= GPIO_bit(gpio);
+ else
+ GFER0 &= ~GPIO_bit(gpio);
+
+ return 0;
+}
+
+static void pxa_ack_low_gpio(unsigned int irq)
+{
+ GEDR0 = (1 << (irq - IRQ_GPIO0));
+}
+
+static void pxa_mask_low_gpio(unsigned int irq)
+{
+ ICMR &= ~(1 << (irq - PXA_IRQ(0)));
+}
+
+static void pxa_unmask_low_gpio(unsigned int irq)
+{
+ ICMR |= 1 << (irq - PXA_IRQ(0));
+}
+
+static struct irq_chip pxa_low_gpio_chip = {
+ .name = "GPIO-l",
+ .ack = pxa_ack_low_gpio,
+ .mask = pxa_mask_low_gpio,
+ .unmask = pxa_unmask_low_gpio,
+ .set_type = pxa_set_low_gpio_type,
+};
+
+static void __init pxa_init_low_gpio_irq(set_wake_t fn)
+{
+ int irq;
+
+ /* clear edge detection on GPIO 0 and 1 */
+ GFER0 &= ~0x3;
+ GRER0 &= ~0x3;
+ GEDR0 = 0x3;
+
+ for (irq = IRQ_GPIO0; irq <= IRQ_GPIO1; irq++) {
+ set_irq_chip(irq, &pxa_low_gpio_chip);
+ set_irq_handler(irq, handle_edge_irq);
+ set_irq_flags(irq, IRQF_VALID);
+ }
+
+ pxa_low_gpio_chip.set_wake = fn;
+}
+
void __init pxa_init_irq(int irq_nr, set_wake_t fn)
{
int irq;
@@ -72,6 +139,7 @@
}
pxa_internal_irq_chip.set_wake = fn;
+ pxa_init_low_gpio_irq(fn);
}
#ifdef CONFIG_PM
