[ARM] pxa: move GPIO IRQ specific code out of irq.c into gpio.c

Signed-off-by: eric miao <eric.miao@marvell.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 1 insertions, 183 deletions

diff --git a/arch/arm/mach-pxa/irq.c b/arch/arm/mach-pxa/irq.c
index 4fd4560dd3ad..da3a44a4249a 100644
--- a/arch/arm/mach-pxa/irq.c
+++ b/arch/arm/mach-pxa/irq.c
@@ -1,7 +1,7 @@
 /*
  *  linux/arch/arm/mach-pxa/irq.c
  *
- *  Generic PXA IRQ handling, GPIO IRQ demultiplexing, etc.
+ *  Generic PXA IRQ handling
  *
  *  Author:     Nicolas Pitre
  *  Created:    Jun 15, 2001
@@ -104,188 +104,6 @@ void __init pxa_init_irq_high(void)
 }
 #endif
 
-/*
- * PXA GPIO edge detection for IRQs:
- * IRQs are generated on Falling-Edge, Rising-Edge, or both.
- * Use this instead of directly setting GRER/GFER.
- */
-
-static long GPIO_IRQ_rising_edge[4];
-static long GPIO_IRQ_falling_edge[4];
-static long GPIO_IRQ_mask[4];
-
-static int pxa_gpio_irq_type(unsigned int irq, unsigned int type)
-{
-        int gpio, idx;
-
-        gpio = IRQ_TO_GPIO(irq);
-        idx = gpio >> 5;
-
-        if (type == IRQ_TYPE_PROBE) {
-                /* Don't mess with enabled GPIOs using preconfigured edges or
-                 * GPIOs set to alternate function or to output during probe
-                 */
-                if ((GPIO_IRQ_rising_edge[idx] |
-                     GPIO_IRQ_falling_edge[idx] |
-                     GPDR(gpio)) & GPIO_bit(gpio))
-                        return 0;
-                if (GAFR(gpio) & (0x3 << (((gpio) & 0xf)*2)))
-                        return 0;
-                type = IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING;
-        }
-
-        pxa_gpio_mode(gpio | GPIO_IN);
-
-        if (type & IRQ_TYPE_EDGE_RISING)
-                __set_bit(gpio, GPIO_IRQ_rising_edge);
-        else
-                __clear_bit(gpio, GPIO_IRQ_rising_edge);
-
-        if (type & IRQ_TYPE_EDGE_FALLING)
-                __set_bit(gpio, GPIO_IRQ_falling_edge);
-        else
-                __clear_bit(gpio, GPIO_IRQ_falling_edge);
-
-        GRER(gpio) = GPIO_IRQ_rising_edge[idx] & GPIO_IRQ_mask[idx];
-        GFER(gpio) = GPIO_IRQ_falling_edge[idx] & GPIO_IRQ_mask[idx];
-
-        pr_debug("%s: IRQ%d (GPIO%d) - edge%s%s\n", __func__, irq, gpio,
-                ((type & IRQ_TYPE_EDGE_RISING)  ? " rising"  : ""),
-                ((type & IRQ_TYPE_EDGE_FALLING) ? " falling" : ""));
-        return 0;
-}
-
-/*
- * GPIO IRQs must be acknowledged.  This is for GPIO 0 and 1.
- */
-
-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_gpio_irq_type,
-};
-
-/*
- * Demux handler for GPIO>=2 edge detect interrupts
- */
-
-#define GEDR_BITS       (sizeof(gedr) * BITS_PER_BYTE)
-
-static void pxa_gpio_demux_handler(unsigned int irq, struct irq_desc *desc)
-{
-        int loop, bit, n;
-        unsigned long gedr[4];
-
-        do {
-                gedr[0] = GEDR0 & GPIO_IRQ_mask[0] & ~3;
-                gedr[1] = GEDR1 & GPIO_IRQ_mask[1];
-                gedr[2] = GEDR2 & GPIO_IRQ_mask[2];
-                gedr[3] = GEDR3 & GPIO_IRQ_mask[3];
-
-                GEDR0 = gedr[0]; GEDR1 = gedr[1];
-                GEDR2 = gedr[2]; GEDR3 = gedr[3];
-
-                loop = 0;
-                bit = find_first_bit(gedr, GEDR_BITS);
-                while (bit < GEDR_BITS) {
-                        loop = 1;
-
-                        n = PXA_GPIO_IRQ_BASE + bit;
-                        desc_handle_irq(n, irq_desc + n);
-
-                        bit = find_next_bit(gedr, GEDR_BITS, bit + 1);
-                }
-        } while (loop);
-}
-
-static void pxa_ack_muxed_gpio(unsigned int irq)
-{
-        int gpio = irq - IRQ_GPIO(2) + 2;
-        GEDR(gpio) = GPIO_bit(gpio);
-}
-
-static void pxa_mask_muxed_gpio(unsigned int irq)
-{
-        int gpio = irq - IRQ_GPIO(2) + 2;
-        __clear_bit(gpio, GPIO_IRQ_mask);
-        GRER(gpio) &= ~GPIO_bit(gpio);
-        GFER(gpio) &= ~GPIO_bit(gpio);
-}
-
-static void pxa_unmask_muxed_gpio(unsigned int irq)
-{
-        int gpio = irq - IRQ_GPIO(2) + 2;
-        int idx = gpio >> 5;
-        __set_bit(gpio, GPIO_IRQ_mask);
-        GRER(gpio) = GPIO_IRQ_rising_edge[idx] & GPIO_IRQ_mask[idx];
-        GFER(gpio) = GPIO_IRQ_falling_edge[idx] & GPIO_IRQ_mask[idx];
-}
-
-static struct irq_chip pxa_muxed_gpio_chip = {
-        .name           = "GPIO",
-        .ack            = pxa_ack_muxed_gpio,
-        .mask           = pxa_mask_muxed_gpio,
-        .unmask         = pxa_unmask_muxed_gpio,
-        .set_type       = pxa_gpio_irq_type,
-};
-
-void __init pxa_init_irq_gpio(int gpio_nr)
-{
-        int irq, i;
-
-        pxa_last_gpio = gpio_nr - 1;
-
-        /* clear all GPIO edge detects */
-        for (i = 0; i < gpio_nr; i += 32) {
-                GFER(i) = 0;
-                GRER(i) = 0;
-                GEDR(i) = GEDR(i);
-        }
-
-        /* GPIO 0 and 1 must have their mask bit always set */
-        GPIO_IRQ_mask[0] = 3;
-
-        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 | IRQF_PROBE);
-        }
-
-        for (irq = IRQ_GPIO(2); irq < IRQ_GPIO(gpio_nr); irq++) {
-                set_irq_chip(irq, &pxa_muxed_gpio_chip);
-                set_irq_handler(irq, handle_edge_irq);
-                set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
-        }
-
-        /* Install handler for GPIO>=2 edge detect interrupts */
-        set_irq_chained_handler(IRQ_GPIO_2_x, pxa_gpio_demux_handler);
-
-        pxa_init_gpio(gpio_nr);
-}
-
-void __init pxa_init_gpio_set_wake(int (*set_wake)(unsigned int, unsigned int))
-{
-        pxa_low_gpio_chip.set_wake = set_wake;
-        pxa_muxed_gpio_chip.set_wake = set_wake;
-}
-
 void __init pxa_init_irq_set_wake(int (*set_wake)(unsigned int, unsigned int))
 {
         pxa_internal_chip_low.set_wake = set_wake;