From: Bartosz Golaszewski <[email protected]> Provide a helper that allows users to retrieve the current irq type of dummy interrupts.
Internally: store the type in the line context when the irq_set_type() callback is called. This is required by the gpio-mockup module which wants to track the state of GPIO lines and simulate rising and falling edge interrupts. Signed-off-by: Bartosz Golaszewski <[email protected]> --- include/linux/irq_sim.h | 2 ++ kernel/irq/irq_sim.c | 23 +++++++++++++++++++++++ 2 files changed, 25 insertions(+) diff --git a/include/linux/irq_sim.h b/include/linux/irq_sim.h index 4500d453a63e..c73be0a2c15c 100644 --- a/include/linux/irq_sim.h +++ b/include/linux/irq_sim.h @@ -22,6 +22,7 @@ struct irq_sim_work_ctx { struct irq_sim_irq_ctx { int irqnum; bool enabled; + int type; }; struct irq_sim { @@ -37,5 +38,6 @@ int devm_irq_sim_init(struct device *dev, struct irq_sim *sim, void irq_sim_fini(struct irq_sim *sim); void irq_sim_fire(struct irq_sim *sim, unsigned int offset); int irq_sim_irqnum(struct irq_sim *sim, unsigned int offset); +unsigned int irq_sim_get_type(struct irq_sim *sim, unsigned int offset); #endif /* _LINUX_IRQ_SIM_H */ diff --git a/kernel/irq/irq_sim.c b/kernel/irq/irq_sim.c index 98a20e1594ce..74561a0dca65 100644 --- a/kernel/irq/irq_sim.c +++ b/kernel/irq/irq_sim.c @@ -25,10 +25,20 @@ static void irq_sim_irqunmask(struct irq_data *data) irq_ctx->enabled = true; } +static int irq_sim_set_type(struct irq_data *data, unsigned int type) +{ + struct irq_sim_irq_ctx *irq_ctx = irq_data_get_irq_chip_data(data); + + irq_ctx->type = type; + + return 0; +} + static struct irq_chip irq_sim_irqchip = { .name = "irq_sim", .irq_mask = irq_sim_irqmask, .irq_unmask = irq_sim_irqunmask, + .irq_set_type = irq_sim_set_type, }; static void irq_sim_handle_irq(struct irq_work *work) @@ -180,3 +190,16 @@ int irq_sim_irqnum(struct irq_sim *sim, unsigned int offset) return sim->irqs[offset].irqnum; } EXPORT_SYMBOL_GPL(irq_sim_irqnum); + +/** + * irq_sim_get_type - Get the type configuration for a dummy interrupt. + * + * @sim: The interrupt simulator object. + * @offset: Offset of the simulated interrupt for which to retrieve + * the type. + */ +unsigned int irq_sim_get_type(struct irq_sim *sim, unsigned int offset) +{ + return sim->irqs[offset].type; +} +EXPORT_SYMBOL_GPL(irq_sim_get_type); -- 2.20.1
