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mfd: Avoid unbalanced asic3 irq wakeup enables/disables 

The mfd/asic3 driver does not currently define a irq_set_wake() handler.
Consequently any attempt to configure the 3 ASIC3 GPIO buttons - RECORD,
CALENDAR, HOME - as wakeup sources results in Unbalanced IRQ warnings
when the system is woken from sleep mode:

WARNING: at kernel/irq/manage.c:520 irq_set_irq_wake+0xc4/0xf8()
Unbalanced IRQ 342 wake disable
...
WARNING: at kernel/irq/manage.c:520 irq_set_irq_wake+0xc4/0xf8()
Unbalanced IRQ 337 wake disable
...
WARNING: at kernel/irq/manage.c:520 irq_set_irq_wake+0xc4/0xf8()
Unbalanced IRQ 339 wake disable
...

This patch adds a irq_set_wake() handler to the mfd/asic3 driver.

Signed-off-by: Paul Parsons <lost.distance@yahoo.com>
Cc: Philipp Zabel <philipp.zabel@gmail.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Paul Parsons 2012-04-11 00:35:34 +01:00 committed by Samuel Ortiz
parent 1baf665b81
commit 2fe372fc2a
1 changed files with 16 additions and 0 deletions
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16
drivers/mfd/asic3.c
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@ -353,12 +353,28 @@ static int asic3_gpio_irq_type(struct irq_data *data, unsigned int type)
return 0;
}
static int asic3_gpio_irq_set_wake(struct irq_data *data, unsigned int on)
{
struct asic3 *asic = irq_data_get_irq_chip_data(data);
u32 bank, index;
u16 bit;
bank = asic3_irq_to_bank(asic, data->irq);
index = asic3_irq_to_index(asic, data->irq);
bit = 1<<index;
asic3_set_register(asic, bank + ASIC3_GPIO_SLEEP_MASK, bit, !on);
return 0;
}
static struct irq_chip asic3_gpio_irq_chip = {
.name = "ASIC3-GPIO",
.irq_ack = asic3_mask_gpio_irq,
.irq_mask = asic3_mask_gpio_irq,
.irq_unmask = asic3_unmask_gpio_irq,
.irq_set_type = asic3_gpio_irq_type,
.irq_set_wake = asic3_gpio_irq_set_wake,
};
static struct irq_chip asic3_irq_chip = {