ARM: OMAP: Reset GPIO irq state after free_irq()
This is needed to reset GPIO after free_irq().
Signed-off-by: Tony Lindgren <tony@atomide.com>
diff --git a/arch/arm/plat-omap/gpio.c b/arch/arm/plat-omap/gpio.c
index b27ba0e..96d7548 100644
--- a/arch/arm/plat-omap/gpio.c
+++ b/arch/arm/plat-omap/gpio.c
@@ -662,6 +662,14 @@
}
}
+static void _reset_gpio(struct gpio_bank *bank, int gpio)
+{
+ _set_gpio_direction(bank, get_gpio_index(gpio), 1);
+ _set_gpio_irqenable(bank, gpio, 0);
+ _clear_gpio_irqstatus(bank, gpio);
+ _set_gpio_triggering(bank, get_gpio_index(gpio), IRQT_NOEDGE);
+}
+
/* Use disable_irq_wake() and enable_irq_wake() functions from drivers */
static int gpio_wake_enable(unsigned int irq, unsigned int enable)
{
@@ -696,7 +704,9 @@
}
bank->reserved_map |= (1 << get_gpio_index(gpio));
- /* Set trigger to none. You need to enable the trigger after request_irq */
+ /* Set trigger to none. You need to enable the desired trigger with
+ * request_irq() or set_irq_type().
+ */
_set_gpio_triggering(bank, get_gpio_index(gpio), IRQT_NOEDGE);
#ifdef CONFIG_ARCH_OMAP15XX
@@ -756,9 +766,7 @@
}
#endif
bank->reserved_map &= ~(1 << get_gpio_index(gpio));
- _set_gpio_direction(bank, get_gpio_index(gpio), 1);
- _set_gpio_irqenable(bank, gpio, 0);
- _clear_gpio_irqstatus(bank, gpio);
+ _reset_gpio(bank, gpio);
spin_unlock(&bank->lock);
}
@@ -898,6 +906,14 @@
}
+static void gpio_irq_shutdown(unsigned int irq)
+{
+ unsigned int gpio = irq - IH_GPIO_BASE;
+ struct gpio_bank *bank = get_gpio_bank(gpio);
+
+ _reset_gpio(bank, gpio);
+}
+
static void gpio_ack_irq(unsigned int irq)
{
unsigned int gpio = irq - IH_GPIO_BASE;
@@ -946,6 +962,7 @@
static struct irq_chip gpio_irq_chip = {
.name = "GPIO",
+ .shutdown = gpio_irq_shutdown,
.ack = gpio_ack_irq,
.mask = gpio_mask_irq,
.unmask = gpio_unmask_irq,