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Message-Id: <1500466814-32679-3-git-send-email-brgl@bgdev.pl>
Date: Wed, 19 Jul 2017 14:20:13 +0200
From: Bartosz Golaszewski <brgl@...ev.pl>
To: Linus Walleij <linus.walleij@...aro.org>,
Thomas Gleixner <tglx@...utronix.de>,
Marc Zyngier <marc.zyngier@....com>,
Jonathan Corbet <corbet@....net>,
Bamvor Jian Zhang <bamvor.zhangjian@...aro.org>,
Jonathan Cameron <jic23@...nel.org>,
Lars-Peter Clausen <lars@...afoo.de>
Cc: linux-kernel@...r.kernel.org, linux-gpio@...r.kernel.org,
linux-doc@...r.kernel.org, Bartosz Golaszewski <brgl@...ev.pl>
Subject: [PATCH 2/3] irq/irq_sim: add a devres variant of irq_sim_init()
Add a resource managed version of irq_sim_init(). This can be
conveniently used in device drivers.
Signed-off-by: Bartosz Golaszewski <brgl@...ev.pl>
---
Documentation/driver-model/devres.txt | 1 +
include/linux/irq_sim.h | 4 ++++
kernel/irq_sim.c | 43 +++++++++++++++++++++++++++++++++++
3 files changed, 48 insertions(+)
diff --git a/Documentation/driver-model/devres.txt b/Documentation/driver-model/devres.txt
index 30e04f7a690d..69f08c0f23a8 100644
--- a/Documentation/driver-model/devres.txt
+++ b/Documentation/driver-model/devres.txt
@@ -312,6 +312,7 @@ IRQ
devm_irq_alloc_descs_from()
devm_irq_alloc_generic_chip()
devm_irq_setup_generic_chip()
+ devm_irq_sim_init()
LED
devm_led_classdev_register()
diff --git a/include/linux/irq_sim.h b/include/linux/irq_sim.h
index 0c1abf0e3244..94c4bfc9b7a9 100644
--- a/include/linux/irq_sim.h
+++ b/include/linux/irq_sim.h
@@ -9,6 +9,7 @@
#define _LINUX_IRQ_SIM_H
#include <linux/irq_work.h>
+#include <linux/device.h>
struct irq_sim_work_ctx {
struct irq_work work;
@@ -30,6 +31,9 @@ struct irq_sim {
int irq_sim_init(struct irq_sim *sim, unsigned int num_irqs);
void irq_sim_fini(struct irq_sim *sim);
+int devm_irq_sim_init(struct device *dev,
+ struct irq_sim *sim, unsigned int num_irqs);
+
void irq_sim_fire(struct irq_sim *sim, unsigned int offset);
int irq_sim_irqnum(struct irq_sim *sim, unsigned int offset);
diff --git a/kernel/irq_sim.c b/kernel/irq_sim.c
index 062110c90d2a..deb5a58eede5 100644
--- a/kernel/irq_sim.c
+++ b/kernel/irq_sim.c
@@ -89,6 +89,49 @@ void irq_sim_fini(struct irq_sim *sim)
}
EXPORT_SYMBOL_GPL(irq_sim_fini);
+struct irq_sim_devres {
+ struct irq_sim *sim;
+};
+
+static void devm_irq_sim_release(struct device *dev, void *res)
+{
+ struct irq_sim_devres *this = res;
+
+ irq_sim_fini(this->sim);
+}
+
+/**
+ * irq_sim_init - Initialize the interrupt simulator for a managed device.
+ *
+ * @dev: Device to initialize the simulator object for.
+ * @sim: The interrupt simulator object to initialize.
+ * @num_irqs: Number of interrupts to allocate
+ *
+ * Returns 0 on success and a negative error number on failure.
+ */
+int devm_irq_sim_init(struct device *dev,
+ struct irq_sim *sim, unsigned int num_irqs)
+{
+ struct irq_sim_devres *dr;
+ int rv;
+
+ dr = devres_alloc(devm_irq_sim_release, sizeof(*dr), GFP_KERNEL);
+ if (!dr)
+ return -ENOMEM;
+
+ rv = irq_sim_init(sim, num_irqs);
+ if (rv) {
+ devres_free(dr);
+ return rv;
+ }
+
+ dr->sim = sim;
+ devres_add(dev, dr);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(devm_irq_sim_init);
+
/**
* irq_sim_fire - Enqueue an interrupt.
*
--
2.13.2
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