linux-kernel - [PATCH v8 06/14] genirq: Introduce irq_chip_{request,release}_resource

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Date:   Tue, 30 Apr 2019 15:42:22 +0530
From:   Lokesh Vutla <lokeshvutla@...com>
To:     Marc Zyngier <marc.zyngier@....com>,
        Santosh Shilimkar <ssantosh@...nel.org>,
        Rob Herring <robh+dt@...nel.org>, Nishanth Menon <nm@...com>,
        <tglx@...utronix.de>, <jason@...edaemon.net>
CC:     Linux ARM Mailing List <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, Tero Kristo <t-kristo@...com>,
        Sekhar Nori <nsekhar@...com>, Tony Lindgren <tony@...mide.com>,
        <linus.walleij@...aro.org>, Peter Ujfalusi <peter.ujfalusi@...com>,
        Grygorii Strashko <grygorii.strashko@...com>,
        Lokesh Vutla <lokeshvutla@...com>,
        Device Tree Mailing List <devicetree@...r.kernel.org>
Subject: [PATCH v8 06/14] genirq: Introduce irq_chip_{request,release}_resource_parent() apis

Introduce irq_chip_{request,release}_resource_parent() apis so
that these can be used in hierarchical irqchips.

Signed-off-by: Lokesh Vutla <lokeshvutla@...com>
---
Changes since v7:
-None

 include/linux/irq.h |  2 ++
 kernel/irq/chip.c   | 27 +++++++++++++++++++++++++++
 2 files changed, 29 insertions(+)

diff --git a/include/linux/irq.h b/include/linux/irq.h
index 7ae8de5ad0f2..fb301cf29148 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -625,6 +625,8 @@ extern int irq_chip_set_wake_parent(struct irq_data *data, unsigned int on);
 extern int irq_chip_set_vcpu_affinity_parent(struct irq_data *data,
 					     void *vcpu_info);
 extern int irq_chip_set_type_parent(struct irq_data *data, unsigned int type);
+extern int irq_chip_request_resources_parent(struct irq_data *data);
+extern void irq_chip_release_resources_parent(struct irq_data *data);
 #endif
 
 /* Handling of unhandled and spurious interrupts: */
diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c
index 51128bea3846..29d6c7d070b4 100644
--- a/kernel/irq/chip.c
+++ b/kernel/irq/chip.c
@@ -1459,6 +1459,33 @@ int irq_chip_set_wake_parent(struct irq_data *data, unsigned int on)
 	return -ENOSYS;
 }
 EXPORT_SYMBOL_GPL(irq_chip_set_wake_parent);
+
+/**
+ * irq_chip_request_resources_parent - Request resources on the parent interrupt
+ * @data:	Pointer to interrupt specific data
+ */
+int irq_chip_request_resources_parent(struct irq_data *data)
+{
+	data = data->parent_data;
+
+	if (data->chip->irq_request_resources)
+		return data->chip->irq_request_resources(data);
+
+	return -ENOSYS;
+}
+EXPORT_SYMBOL_GPL(irq_chip_request_resources_parent);
+
+/**
+ * irq_chip_release_resources_parent - Release resources on the parent interrupt
+ * @data:	Pointer to interrupt specific data
+ */
+void irq_chip_release_resources_parent(struct irq_data *data)
+{
+	data = data->parent_data;
+	if (data->chip->irq_release_resources)
+		data->chip->irq_release_resources(data);
+}
+EXPORT_SYMBOL_GPL(irq_chip_release_resources_parent);
 #endif
 
 /**
-- 
2.21.0