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irqchip: qcom-pdc: add irqchip set/get state calls

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Add irqchip calls to set/get interrupt state from the parent interrupt
controller. When GPIOs are renabled as interrupt lines, it is desirable
to clear the interrupt state at the GIC. This avoids any unwanted
interrupt as a result of stale pending state recorded when the line was
used as a GPIO.

Change-Id: Ibd551f84d8f6ae15b8d9702faeb585a69f283f6e
Signed-off-by: Maulik Shah <mkshah@codeaurora.org>
Signed-off-by: Lina Iyer <ilina@codeaurora.org>
This commit is contained in:
Lina Iyer 2018-12-18 11:23:53 -07:00 • committed by Maulik Shah
commit 67c413154e
1 changed files with 23 additions and 0 deletions
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23
drivers/irqchip/qcom-pdc.c
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@ -5,6 +5,7 @@
#include <linux/err.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/irqchip.h>
#include <linux/irqdomain.h>
@ -50,6 +51,26 @@ static u32 pdc_reg_read(int reg, u32 i)
return readl_relaxed(pdc_base + reg + i * sizeof(u32));
}
static int qcom_pdc_gic_get_irqchip_state(struct irq_data *d,
enum irqchip_irq_state which,
bool *state)
{
if (d->hwirq == GPIO_NO_WAKE_IRQ)
return 0;
return irq_chip_get_parent_state(d, which, state);
}
static int qcom_pdc_gic_set_irqchip_state(struct irq_data *d,
enum irqchip_irq_state which,
bool value)
{
if (d->hwirq == GPIO_NO_WAKE_IRQ)
return 0;
return irq_chip_set_parent_state(d, which, value);
}
static void pdc_enable_intr(struct irq_data *d, bool on)
{
int pin_out = d->hwirq;
@ -178,6 +199,8 @@ static struct irq_chip qcom_pdc_gic_chip = {
.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,
.flags = IRQCHIP_MASK_ON_SUSPEND |