linux-kernel - [PATCH v2 3/9] irq/irq_sim: provide irq_sim_fire

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Date:   Tue, 29 Jan 2019 09:44:05 +0100
From:   Bartosz Golaszewski <brgl@...ev.pl>
To:     Linus Walleij <linus.walleij@...aro.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Marc Zyngier <marc.zyngier@....com>,
        Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>
Cc:     linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org,
        Bartosz Golaszewski <bgolaszewski@...libre.com>
Subject: [PATCH v2 3/9] irq/irq_sim: provide irq_sim_fire_type()

From: Bartosz Golaszewski <bgolaszewski@...libre.com>

Provide a more specialized variant of irq_sim_fire() that allows to
specify the type of the fired interrupt. The type is stored in the
dummy irq context struct via the set_type callback.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@...libre.com>
---
 include/linux/irq_sim.h |  9 ++++++++-
 kernel/irq/irq_sim.c    | 26 ++++++++++++++++++++++----
 2 files changed, 30 insertions(+), 5 deletions(-)

diff --git a/include/linux/irq_sim.h b/include/linux/irq_sim.h
index b96c2f752320..647a6c8ffb31 100644
--- a/include/linux/irq_sim.h
+++ b/include/linux/irq_sim.h
@@ -23,6 +23,7 @@ struct irq_sim_work_ctx {
 
 struct irq_sim_irq_ctx {
 	bool			enabled;
+	unsigned int		type;
 };
 
 struct irq_sim {
@@ -37,7 +38,13 @@ int irq_sim_init(struct irq_sim *sim, unsigned int num_irqs);
 int devm_irq_sim_init(struct device *dev, struct irq_sim *sim,
 		      unsigned int num_irqs);
 void irq_sim_fini(struct irq_sim *sim);
-void irq_sim_fire(struct irq_sim *sim, unsigned int offset);
+void irq_sim_fire_type(struct irq_sim *sim,
+		       unsigned int offset, unsigned int type);
 int irq_sim_irqnum(struct irq_sim *sim, unsigned int offset);
 
+static inline void irq_sim_fire(struct irq_sim *sim, unsigned int offset)
+{
+	irq_sim_fire_type(sim, offset, IRQ_TYPE_DEFAULT);
+}
+
 #endif /* _LINUX_IRQ_SIM_H */
diff --git a/kernel/irq/irq_sim.c b/kernel/irq/irq_sim.c
index 2bcdbab1bc5a..e3160b5e59b8 100644
--- a/kernel/irq/irq_sim.c
+++ b/kernel/irq/irq_sim.c
@@ -25,6 +25,15 @@ 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 void irq_sim_handle_irq(struct irq_work *work)
 {
 	struct irq_sim_work_ctx *work_ctx;
@@ -107,6 +116,7 @@ int irq_sim_init(struct irq_sim *sim, unsigned int num_irqs)
 	sim->chip.name = "irq_sim";
 	sim->chip.irq_mask = irq_sim_irqmask;
 	sim->chip.irq_unmask = irq_sim_irqunmask;
+	sim->chip.irq_set_type = irq_sim_set_type;
 
 	sim->work_ctx.pending = bitmap_zalloc(num_irqs, GFP_KERNEL);
 	if (!sim->work_ctx.pending) {
@@ -192,21 +202,29 @@ irq_sim_get_ctx(struct irq_sim *sim, unsigned int offset)
 }
 
 /**
- * irq_sim_fire - Enqueue an interrupt.
+ * irq_sim_fire_type - Enqueue an interrupt.
  *
  * @sim:        The interrupt simulator object.
  * @offset:     Offset of the simulated interrupt which should be fired.
+ * @type:	Type of the fired interrupt. Must be one of the following:
+ *		IRQ_TYPE_EDGE_RISING, IRQ_TYPE_EDGE_FALLING,
+ *		IRQ_TYPE_EDGE_BOTH, IRQ_TYPE_LEVEL_HIGH,
+ *		IRQ_TYPE_LEVEL_LOW, IRQ_TYPE_DEFAULT
  */
-void irq_sim_fire(struct irq_sim *sim, unsigned int offset)
+void irq_sim_fire_type(struct irq_sim *sim,
+		       unsigned int offset, unsigned int type)
 {
 	struct irq_sim_irq_ctx *ctx = irq_sim_get_ctx(sim, offset);
 
-	if (ctx->enabled) {
+	/* Only care about relevant flags. */
+	type &= IRQ_TYPE_SENSE_MASK;
+
+	if (ctx->enabled && (ctx->type & type)) {
 		set_bit(offset, sim->work_ctx.pending);
 		irq_work_queue(&sim->work_ctx.work);
 	}
 }
-EXPORT_SYMBOL_GPL(irq_sim_fire);
+EXPORT_SYMBOL_GPL(irq_sim_fire_type);
 
 /**
  * irq_sim_irqnum - Get the allocated number of a dummy interrupt.
-- 
2.19.1