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Subject[PATCH 4/4] irqchip: qcom-pdc: Introduce irq_set_wake call
Date
Remove irq_disable callback to allow lazy disable for pdc interrupts.

Add irq_set_wake callback that unmask interrupt in HW when drivers
mark interrupt for wakeup. Interrupt will be cleared in HW during
lazy disable if its not marked for wakeup.

Signed-off-by: Maulik Shah <mkshah@codeaurora.org>
---
drivers/irqchip/qcom-pdc.c | 33 +++++++++++++++++----------------
1 file changed, 17 insertions(+), 16 deletions(-)

diff --git a/drivers/irqchip/qcom-pdc.c b/drivers/irqchip/qcom-pdc.c
index 6ae9e1f..f7c0662 100644
--- a/drivers/irqchip/qcom-pdc.c
+++ b/drivers/irqchip/qcom-pdc.c
@@ -36,6 +36,7 @@ struct pdc_pin_region {
u32 cnt;
};

+DECLARE_BITMAP(pdc_wake_irqs, PDC_MAX_IRQS);
static DEFINE_RAW_SPINLOCK(pdc_lock);
static void __iomem *pdc_base;
static struct pdc_pin_region *pdc_region;
@@ -87,22 +88,20 @@ static void pdc_enable_intr(struct irq_data *d, bool on)
raw_spin_unlock(&pdc_lock);
}

-static void qcom_pdc_gic_disable(struct irq_data *d)
+static int qcom_pdc_gic_set_wake(struct irq_data *d, unsigned int on)
{
if (d->hwirq == GPIO_NO_WAKE_IRQ)
- return;
-
- pdc_enable_intr(d, false);
- irq_chip_disable_parent(d);
-}
+ return 0;

-static void qcom_pdc_gic_enable(struct irq_data *d)
-{
- if (d->hwirq == GPIO_NO_WAKE_IRQ)
- return;
+ if (on) {
+ pdc_enable_intr(d, true);
+ irq_chip_enable_parent(d);
+ set_bit(d->hwirq, pdc_wake_irqs);
+ } else {
+ clear_bit(d->hwirq, pdc_wake_irqs);
+ }

- pdc_enable_intr(d, true);
- irq_chip_enable_parent(d);
+ return irq_chip_set_wake_parent(d, on);
}

static void qcom_pdc_gic_mask(struct irq_data *d)
@@ -110,6 +109,9 @@ static void qcom_pdc_gic_mask(struct irq_data *d)
if (d->hwirq == GPIO_NO_WAKE_IRQ)
return;

+ if (!test_bit(d->hwirq, pdc_wake_irqs))
+ pdc_enable_intr(d, false);
+
irq_chip_mask_parent(d);
}

@@ -118,6 +120,7 @@ static void qcom_pdc_gic_unmask(struct irq_data *d)
if (d->hwirq == GPIO_NO_WAKE_IRQ)
return;

+ pdc_enable_intr(d, true);
irq_chip_unmask_parent(d);
}

@@ -197,15 +200,13 @@ static struct irq_chip qcom_pdc_gic_chip = {
.irq_eoi = irq_chip_eoi_parent,
.irq_mask = qcom_pdc_gic_mask,
.irq_unmask = qcom_pdc_gic_unmask,
- .irq_disable = qcom_pdc_gic_disable,
- .irq_enable = qcom_pdc_gic_enable,
.irq_get_irqchip_state = qcom_pdc_gic_get_irqchip_state,
.irq_set_irqchip_state = qcom_pdc_gic_set_irqchip_state,
.irq_retrigger = irq_chip_retrigger_hierarchy,
.irq_set_type = qcom_pdc_gic_set_type,
+ .irq_set_wake = qcom_pdc_gic_set_wake,
.flags = IRQCHIP_MASK_ON_SUSPEND |
- IRQCHIP_SET_TYPE_MASKED |
- IRQCHIP_SKIP_SET_WAKE,
+ IRQCHIP_SET_TYPE_MASKED,
.irq_set_vcpu_affinity = irq_chip_set_vcpu_affinity_parent,
.irq_set_affinity = irq_chip_set_affinity_parent,
};
--
QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member
of Code Aurora Forum, hosted by The Linux Foundation
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