genirq: Introduce irq_chip_get/set_parent_state calls
On certain QTI chipsets some GPIOs are direct-connect interrupts to the GIC. Even when GPIOs are not used for interrupt generation and interrupt line is disabled, it does not prevent interrupt to get pending at GIC_ISPEND. When drivers call enable_irq unwanted interrupt occures. Introduce irq_chip_get/set_parent_state calls to clear pending irq which can get called within irq_enable of child irq chip to clear any pending irq before enabling. Change-Id: Ie8559657bd8da926cc741514809ffe9adbd73a80 Signed-off-by: Maulik Shah <mkshah@codeaurora.org>
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2 changed files with 50 additions and 0 deletions
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@ -599,6 +599,12 @@ extern int irq_chip_pm_put(struct irq_data *data);
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#ifdef CONFIG_IRQ_DOMAIN_HIERARCHY
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extern void handle_fasteoi_ack_irq(struct irq_desc *desc);
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extern void handle_fasteoi_mask_irq(struct irq_desc *desc);
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extern int irq_chip_set_parent_state(struct irq_data *data,
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enum irqchip_irq_state which,
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bool val);
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extern int irq_chip_get_parent_state(struct irq_data *data,
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enum irqchip_irq_state which,
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bool *state);
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extern void irq_chip_enable_parent(struct irq_data *data);
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extern void irq_chip_disable_parent(struct irq_data *data);
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extern void irq_chip_ack_parent(struct irq_data *data);
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@ -1233,6 +1233,50 @@ EXPORT_SYMBOL_GPL(handle_fasteoi_mask_irq);
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#endif /* CONFIG_IRQ_FASTEOI_HIERARCHY_HANDLERS */
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/**
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* irq_chip_set_parent_state - set the state of a parent interrupt.
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* @data: Pointer to interrupt specific data
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* @which: State to be restored (one of IRQCHIP_STATE_*)
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* @val: Value corresponding to @which
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*
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*/
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int irq_chip_set_parent_state(struct irq_data *data,
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enum irqchip_irq_state which,
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bool val)
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{
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data = data->parent_data;
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if (!data)
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return 0;
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if (data->chip->irq_set_irqchip_state)
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return data->chip->irq_set_irqchip_state(data, which, val);
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return 0;
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}
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EXPORT_SYMBOL(irq_chip_set_parent_state);
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/**
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* irq_chip_get_parent_state - get the state of a parent interrupt.
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* @data: Pointer to interrupt specific data
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* @which: one of IRQCHIP_STATE_* the caller wants to know
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* @state: a pointer to a boolean where the state is to be stored
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*
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*/
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int irq_chip_get_parent_state(struct irq_data *data,
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enum irqchip_irq_state which,
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bool *state)
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{
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data = data->parent_data;
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if (!data)
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return 0;
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if (data->chip->irq_get_irqchip_state)
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return data->chip->irq_get_irqchip_state(data, which, state);
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return 0;
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}
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EXPORT_SYMBOL(irq_chip_get_parent_state);
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/**
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* irq_chip_enable_parent - Enable the parent interrupt (defaults to unmask if
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* NULL)
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