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Merge branch irq/qcom-pdc-nowake-cleanup into irq/irqchip-next

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* irq/qcom-pdc-nowake-cleanup:
  : Fix the QCOM PDC mishandling of the interrupt hierarchy by trimming
  : it when necessary.
  : Export irq_domain_disconnect_hierarchy as a consequence of it.
  irqchip/qcom-pdc: Trim unused levels of the interrupt hierarchy
  irqdomain: Export irq_domain_disconnect_hierarchy()

Signed-off-by: Marc Zyngier <maz@kernel.org>
This commit is contained in:
Marc Zyngier 2021-08-23 09:50:46 +01:00
commit 6e3b473ee0
2 changed files with 12 additions and 57 deletions
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68
drivers/irqchip/qcom-pdc.c
View File

@ -53,26 +53,6 @@ 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;
@ -91,38 +71,16 @@ static void pdc_enable_intr(struct irq_data *d, bool on)
static void qcom_pdc_gic_disable(struct irq_data *d)
{
if (d->hwirq == GPIO_NO_WAKE_IRQ)
return;
pdc_enable_intr(d, false);
irq_chip_disable_parent(d);
}
static void qcom_pdc_gic_enable(struct irq_data *d)
{
if (d->hwirq == GPIO_NO_WAKE_IRQ)
return;
pdc_enable_intr(d, true);
irq_chip_enable_parent(d);
}
static void qcom_pdc_gic_mask(struct irq_data *d)
{
if (d->hwirq == GPIO_NO_WAKE_IRQ)
return;
irq_chip_mask_parent(d);
}
static void qcom_pdc_gic_unmask(struct irq_data *d)
{
if (d->hwirq == GPIO_NO_WAKE_IRQ)
return;
irq_chip_unmask_parent(d);
}
/*
* GIC does not handle falling edge or active low. To allow falling edge and
* active low interrupts to be handled at GIC, PDC has an inverter that inverts
@ -159,14 +117,10 @@ enum pdc_irq_config_bits {
*/
static int qcom_pdc_gic_set_type(struct irq_data *d, unsigned int type)
{
int pin_out = d->hwirq;
enum pdc_irq_config_bits pdc_type;
enum pdc_irq_config_bits old_pdc_type;
int ret;
if (pin_out == GPIO_NO_WAKE_IRQ)
return 0;
switch (type) {
case IRQ_TYPE_EDGE_RISING:
pdc_type = PDC_EDGE_RISING;
@ -191,8 +145,8 @@ static int qcom_pdc_gic_set_type(struct irq_data *d, unsigned int type)
return -EINVAL;
}
old_pdc_type = pdc_reg_read(IRQ_i_CFG, pin_out);
pdc_reg_write(IRQ_i_CFG, pin_out, pdc_type);
old_pdc_type = pdc_reg_read(IRQ_i_CFG, d->hwirq);
pdc_reg_write(IRQ_i_CFG, d->hwirq, pdc_type);
ret = irq_chip_set_type_parent(d, type);
if (ret)
@ -216,12 +170,12 @@ static int qcom_pdc_gic_set_type(struct irq_data *d, unsigned int type)
static struct irq_chip qcom_pdc_gic_chip = {
.name = "PDC",
.irq_eoi = irq_chip_eoi_parent,
.irq_mask = qcom_pdc_gic_mask,
.irq_unmask = qcom_pdc_gic_unmask,
.irq_mask = irq_chip_mask_parent,
.irq_unmask = irq_chip_unmask_parent,
.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_get_irqchip_state = irq_chip_get_parent_state,
.irq_set_irqchip_state = irq_chip_set_parent_state,
.irq_retrigger = irq_chip_retrigger_hierarchy,
.irq_set_type = qcom_pdc_gic_set_type,
.flags = IRQCHIP_MASK_ON_SUSPEND |
@ -282,7 +236,7 @@ static int qcom_pdc_alloc(struct irq_domain *domain, unsigned int virq,
parent_hwirq = get_parent_hwirq(hwirq);
if (parent_hwirq == PDC_NO_PARENT_IRQ)
return 0;
return irq_domain_disconnect_hierarchy(domain->parent, virq);
if (type & IRQ_TYPE_EDGE_BOTH)
type = IRQ_TYPE_EDGE_RISING;
@ -319,17 +273,17 @@ static int qcom_pdc_gpio_alloc(struct irq_domain *domain, unsigned int virq,
if (ret)
return ret;
if (hwirq == GPIO_NO_WAKE_IRQ)
return irq_domain_disconnect_hierarchy(domain, virq);
ret = irq_domain_set_hwirq_and_chip(domain, virq, hwirq,
&qcom_pdc_gic_chip, NULL);
if (ret)
return ret;
if (hwirq == GPIO_NO_WAKE_IRQ)
return 0;
parent_hwirq = get_parent_hwirq(hwirq);
if (parent_hwirq == PDC_NO_PARENT_IRQ)
return 0;
return irq_domain_disconnect_hierarchy(domain->parent, virq);
if (type & IRQ_TYPE_EDGE_BOTH)
type = IRQ_TYPE_EDGE_RISING;

1
kernel/irq/irqdomain.c
View File

@ -1215,6 +1215,7 @@ int irq_domain_disconnect_hierarchy(struct irq_domain *domain,
irqd->chip = ERR_PTR(-ENOTCONN);
return 0;
}
EXPORT_SYMBOL_GPL(irq_domain_disconnect_hierarchy);
static int irq_domain_trim_hierarchy(unsigned int virq)
{