mfd: Support active high IRQs on WM835x

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

2 files changed, 17 insertions, 1 deletions

diff --git a/drivers/mfd/wm8350-core.c b/drivers/mfd/wm8350-core.c
index f22b18b70796..a285cc0cc704 100644
--- a/drivers/mfd/wm8350-core.c
+++ b/drivers/mfd/wm8350-core.c
@@ -1438,7 +1438,21 @@ int wm8350_device_init(struct wm8350 *wm8350, int irq,
         mutex_init(&wm8350->irq_mutex);
         INIT_WORK(&wm8350->irq_work, wm8350_irq_worker);
         if (irq) {
-                ret = request_irq(irq, wm8350_irq, 0,
+                int flags = 0;
+
+                if (pdata && pdata->irq_high) {
+                        flags |= IRQF_TRIGGER_HIGH;
+
+                        wm8350_set_bits(wm8350, WM8350_SYSTEM_CONTROL_1,
+                                        WM8350_IRQ_POL);
+                } else {
+                        flags |= IRQF_TRIGGER_LOW;
+
+                        wm8350_clear_bits(wm8350, WM8350_SYSTEM_CONTROL_1,
+                                          WM8350_IRQ_POL);
+                }
+
+                ret = request_irq(irq, wm8350_irq, flags,
                                   "wm8350", wm8350);
                 if (ret != 0) {
                         dev_err(wm8350->dev, "Failed to request IRQ: %d\n",
diff --git a/include/linux/mfd/wm8350/core.h b/include/linux/mfd/wm8350/core.h
index 980669d50dca..42cca672f340 100644
--- a/include/linux/mfd/wm8350/core.h
+++ b/include/linux/mfd/wm8350/core.h
@@ -640,9 +640,11 @@ struct wm8350 {
  *
  * @init: Function called during driver initialisation.  Should be
  *        used by the platform to configure GPIO functions and similar.
+ * @irq_high: Set if WM8350 IRQ is active high.
  */
 struct wm8350_platform_data {
         int (*init)(struct wm8350 *wm8350);
+        int irq_high;
 };