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authorSascha Hauer <s.hauer@pengutronix.de>2011-06-02 19:18:54 +0100
committerSamuel Ortiz <sameo@linux.intel.com>2011-07-31 23:28:20 +0200
commitd1738aef387ab9591a6d13b00945e248b942c53f (patch)
tree3841b65f9c2808874f7954ce1e2c4035904bc4fd /drivers
parente69b6de181167a132eee7c38c7e4b47dea3d8e49 (diff)
mfd: Allocate wm835x irq descs dynamically
This allows boards to leave the irq_base field unitialized and prevents them having to reserve irqs in the platform. pdata can be optional for irq support now. Without pdata the driver allocates some free irq range. With pdata and irq_base > 0 the driver allocates exactly the specified irq. Without pdata the irq defaults to IRQF_TRIGGER_LOW. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/mfd/wm8350-irq.c18
1 files changed, 12 insertions, 6 deletions
diff --git a/drivers/mfd/wm8350-irq.c b/drivers/mfd/wm8350-irq.c
index ed4b22a167b3..8a1fafd0bf7d 100644
--- a/drivers/mfd/wm8350-irq.c
+++ b/drivers/mfd/wm8350-irq.c
@@ -473,17 +473,13 @@ int wm8350_irq_init(struct wm8350 *wm8350, int irq,
{
int ret, cur_irq, i;
int flags = IRQF_ONESHOT;
+ int irq_base = -1;
if (!irq) {
dev_warn(wm8350->dev, "No interrupt support, no core IRQ\n");
return 0;
}
- if (!pdata || !pdata->irq_base) {
- dev_warn(wm8350->dev, "No interrupt support, no IRQ base\n");
- return 0;
- }
-
/* Mask top level interrupts */
wm8350_reg_write(wm8350, WM8350_SYSTEM_INTERRUPTS_MASK, 0xFFFF);
@@ -502,7 +498,17 @@ int wm8350_irq_init(struct wm8350 *wm8350, int irq,
wm8350->chip_irq = irq;
wm8350->irq_base = pdata->irq_base;
- if (pdata->irq_high) {
+ if (pdata && pdata->irq_base > 0)
+ irq_base = pdata->irq_base;
+
+ wm8350->irq_base = irq_alloc_descs(irq_base, 0, ARRAY_SIZE(wm8350_irqs), 0);
+ if (wm8350->irq_base < 0) {
+ dev_warn(wm8350->dev, "Allocating irqs failed with %d\n",
+ wm8350->irq_base);
+ return 0;
+ }
+
+ if (pdata && pdata->irq_high) {
flags |= IRQF_TRIGGER_HIGH;
wm8350_set_bits(wm8350, WM8350_SYSTEM_CONTROL_1,