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-rw-r--r--drivers/mfd/wm831x-irq.c18
-rw-r--r--include/linux/mfd/wm831x/core.h2
2 files changed, 14 insertions, 6 deletions
diff --git a/drivers/mfd/wm831x-irq.c b/drivers/mfd/wm831x-irq.c
index b23d8d5ee96c..1808deb8083b 100644
--- a/drivers/mfd/wm831x-irq.c
+++ b/drivers/mfd/wm831x-irq.c
@@ -527,13 +527,22 @@ int wm831x_irq_init(struct wm831x *wm831x, int irq)
0xffff);
}
- if (!pdata || !pdata->irq_base) {
- dev_err(wm831x->dev,
- "No interrupt base specified, no interrupts\n");
+ /* Try to dynamically allocate IRQs if no base is specified */
+ if (!pdata || !pdata->irq_base)
+ wm831x->irq_base = -1;
+ else
+ wm831x->irq_base = pdata->irq_base;
+
+ wm831x->irq_base = irq_alloc_descs(wm831x->irq_base, 0,
+ WM831X_NUM_IRQS, 0);
+ if (wm831x->irq_base < 0) {
+ dev_warn(wm831x->dev, "Failed to allocate IRQs: %d\n",
+ wm831x->irq_base);
+ wm831x->irq_base = 0;
return 0;
}
- if (pdata->irq_cmos)
+ if (pdata && pdata->irq_cmos)
i = 0;
else
i = WM831X_IRQ_OD;
@@ -553,7 +562,6 @@ int wm831x_irq_init(struct wm831x *wm831x, int irq)
}
wm831x->irq = irq;
- wm831x->irq_base = pdata->irq_base;
/* Register them with genirq */
for (cur_irq = wm831x->irq_base;
diff --git a/include/linux/mfd/wm831x/core.h b/include/linux/mfd/wm831x/core.h
index ebead1c401aa..9564cf315276 100644
--- a/include/linux/mfd/wm831x/core.h
+++ b/include/linux/mfd/wm831x/core.h
@@ -262,7 +262,7 @@ struct wm831x {
int irq; /* Our chip IRQ */
struct mutex irq_lock;
- unsigned int irq_base;
+ int irq_base;
int irq_masks_cur[WM831X_NUM_IRQ_REGS]; /* Currently active value */
int irq_masks_cache[WM831X_NUM_IRQ_REGS]; /* Cached hardware value */
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