mfd: wm8994: Emulate level triggered interrupts if required

The interrupt controller on the wm8994 series of devices requires a level
triggered parent. If one is not available but a GPIO is available for the
interrupt then emulate.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

2 files changed, 7 insertions, 0 deletions

diff --git a/include/linux/mfd/wm8994/core.h b/include/linux/mfd/wm8994/core.h
index ae5c249530b4..40854ac0ba3d 100644
--- a/include/linux/mfd/wm8994/core.h
+++ b/include/linux/mfd/wm8994/core.h
@@ -29,6 +29,7 @@ enum wm8994_type {
 
 struct regulator_dev;
 struct regulator_bulk_data;
+struct irq_domain;
 
 #define WM8994_NUM_GPIO_REGS 11
 #define WM8994_NUM_LDO_REGS   2
@@ -73,6 +74,7 @@ struct wm8994 {
 
         int irq;
         struct regmap_irq_chip_data *irq_data;
+        struct irq_domain *edge_irq;
 
         /* Used over suspend/resume */
         bool suspended;
diff --git a/include/linux/mfd/wm8994/pdata.h b/include/linux/mfd/wm8994/pdata.h
index 68e776594889..90e9bf86e643 100644
--- a/include/linux/mfd/wm8994/pdata.h
+++ b/include/linux/mfd/wm8994/pdata.h
@@ -223,6 +223,11 @@ struct wm8994_pdata {
          * lines is mastered.
          */
         int max_channels_clocked[WM8994_NUM_AIF];
+
+        /**
+         * GPIO for the IRQ pin if host only supports edge triggering
+         */
+        int irq_gpio;
 };
 
 #endif