mfd: wm8994: Update to fully use irq_domain

Take advantage of the new regmap irq_domain support to dynamically
allocate interrupts, using regmap_irq_get_virq() rather than irq_base
to look up the interrupts. This means that most users should not need
to specify an irq_base at all.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Samuel Ortiz <sameo@linux.intel.com>

drivers/mfd/wm8994-irq.c

@@ -147,12 +147,6 @@ int wm8994_irq_init(struct wm8994 *wm8994)
 		return 0;
 	}
 
-	if (!wm8994->irq_base) {
-		dev_err(wm8994->dev,
-			"No interrupt base specified, no interrupts\n");
-		return 0;
-	}
-
 	ret = regmap_add_irq_chip(wm8994->regmap, wm8994->irq,
 				  IRQF_TRIGGER_HIGH | IRQF_ONESHOT,
 				  wm8994->irq_base, &wm8994_irq_chip,

include/linux/mfd/wm8994/core.h

@@ -17,6 +17,7 @@
 
 #include <linux/mutex.h>
 #include <linux/interrupt.h>
+#include <linux/regmap.h>
 
 enum wm8994_type {
 	WM8994 = 0,
@@ -26,7 +27,6 @@ enum wm8994_type {
 
 struct regulator_dev;
 struct regulator_bulk_data;
-struct regmap;
 
 #define WM8994_NUM_GPIO_REGS 11
 #define WM8994_NUM_LDO_REGS   2
@@ -94,17 +94,17 @@ static inline int wm8994_request_irq(struct wm8994 *wm8994, int irq,
 				     irq_handler_t handler, const char *name,
 				     void *data)
 {
-	if (!wm8994->irq_base)
+	if (!wm8994->irq_data)
 		return -EINVAL;
-	return request_threaded_irq(wm8994->irq_base + irq, NULL, handler,
-				    IRQF_TRIGGER_RISING, name,
+	return request_threaded_irq(regmap_irq_get_virq(wm8994->irq_data, irq),
+				    NULL, handler, IRQF_TRIGGER_RISING, name,
 				    data);
 }
 static inline void wm8994_free_irq(struct wm8994 *wm8994, int irq, void *data)
 {
-	if (!wm8994->irq_base)
+	if (!wm8994->irq_data)
 		return;
-	free_irq(wm8994->irq_base + irq, data);
+	free_irq(regmap_irq_get_virq(wm8994->irq_data, irq), data);
 }
 
 int wm8994_irq_init(struct wm8994 *wm8994);