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Subject[PATCH v3 1/7] irq/irq_sim: provide irq_sim_get_type()
Date
From: Bartosz Golaszewski <bgolaszewski@baylibre.com>

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 <bgolaszewski@baylibre.com>
---
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
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