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path: root/drivers/gpio/gpio-mxc.c
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Diffstat (limited to 'drivers/gpio/gpio-mxc.c')
-rw-r--r--drivers/gpio/gpio-mxc.c19
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/gpio/gpio-mxc.c b/drivers/gpio/gpio-mxc.c
index 4340acae3bd..e7914763457 100644
--- a/drivers/gpio/gpio-mxc.c
+++ b/drivers/gpio/gpio-mxc.c
@@ -29,7 +29,11 @@
#include <linux/basic_mmio_gpio.h>
#include <linux/of.h>
#include <linux/of_device.h>
+#include <linux/module.h>
#include <asm-generic/bug.h>
+#include <asm/mach/irq.h>
+
+#define irq_to_gpio(irq) ((irq) - MXC_GPIO_IRQ_START)
enum mxc_gpio_hwtype {
IMX1_GPIO, /* runs on i.mx1 */
@@ -232,10 +236,15 @@ static void mx3_gpio_irq_handler(u32 irq, struct irq_desc *desc)
{
u32 irq_stat;
struct mxc_gpio_port *port = irq_get_handler_data(irq);
+ struct irq_chip *chip = irq_get_chip(irq);
+
+ chained_irq_enter(chip, desc);
irq_stat = readl(port->base + GPIO_ISR) & readl(port->base + GPIO_IMR);
mxc_gpio_irq_handler(port, irq_stat);
+
+ chained_irq_exit(chip, desc);
}
/* MX2 has one interrupt *for all* gpio ports */
@@ -337,6 +346,15 @@ static void __devinit mxc_gpio_get_hw(struct platform_device *pdev)
mxc_gpio_hwtype = hwtype;
}
+static int mxc_gpio_to_irq(struct gpio_chip *gc, unsigned offset)
+{
+ struct bgpio_chip *bgc = to_bgpio_chip(gc);
+ struct mxc_gpio_port *port =
+ container_of(bgc, struct mxc_gpio_port, bgc);
+
+ return port->virtual_irq_start + offset;
+}
+
static int __devinit mxc_gpio_probe(struct platform_device *pdev)
{
struct device_node *np = pdev->dev.of_node;
@@ -403,6 +421,7 @@ static int __devinit mxc_gpio_probe(struct platform_device *pdev)
if (err)
goto out_iounmap;
+ port->bgc.gc.to_irq = mxc_gpio_to_irq;
port->bgc.gc.base = pdev->id * 32;
port->bgc.dir = port->bgc.read_reg(port->bgc.reg_dir);
port->bgc.data = port->bgc.read_reg(port->bgc.reg_set);