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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>
This commit is contained in:
Sascha Hauer 2011-06-02 19:18:54 +01:00 committed by Samuel Ortiz
parent e69b6de181
commit d1738aef38
1 changed files with 12 additions and 6 deletions
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18
drivers/mfd/wm8350-irq.c
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@ -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,