linux-kernel - [PATCH v5 2/6] genirq: Add more helper functions to support stacked irq

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Message-ID: <1414576824-16143-3-git-send-email-yingjoe.chen@mediatek.com>
Date:	Wed, 29 Oct 2014 18:00:20 +0800
From:	Yingjoe Chen <yingjoe.chen@...iatek.com>
To:	Matthias Brugger <matthias.bgg@...il.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Jiang Liu <jiang.liu@...ux.intel.com>,
	Marc Zyngier <marc.zyngier@....com>, <arm@...nel.org>
CC:	Rob Herring <robh+dt@...nel.org>, Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Russell King <linux@....linux.org.uk>,
	Jason Cooper <jason@...edaemon.net>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Yingjoe Chen <yingjoe.chen@...iatek.com>,
	Grant Likely <grant.likely@...aro.org>,
	Boris BREZILLON <boris.brezillon@...e-electrons.com>,
	<devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	<srv_heupstream@...iatek.com>, <yingjoe.chen@...il.com>,
	<hc.yen@...iatek.com>, <eddie.huang@...iatek.com>,
	<nathan.chung@...iatek.com>, <yh.chen@...iatek.com>,
	Sascha Hauer <kernel@...gutronix.de>,
	Olof Johansson <olof@...om.net>, Arnd Bergmann <arnd@...db.de>
Subject: [PATCH v5 2/6] genirq: Add more helper functions to support stacked irq_chip

Add more helper function for stacked irq_chip to just call parent's
function.

Signed-off-by: Yingjoe Chen <yingjoe.chen@...iatek.com>
---
 include/linux/irq.h |  6 ++++++
 kernel/irq/chip.c   | 28 ++++++++++++++++++++++++++++
 2 files changed, 34 insertions(+)

diff --git a/include/linux/irq.h b/include/linux/irq.h
index 0adcbbb..ff0a89c 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -445,6 +445,12 @@ extern void handle_nested_irq(unsigned int irq);
 
 #ifdef	CONFIG_IRQ_DOMAIN_HIERARCHY
 extern void irq_chip_ack_parent(struct irq_data *data);
+extern void irq_chip_mask_parent(struct irq_data *data);
+extern void irq_chip_unmask_parent(struct irq_data *data);
+extern void irq_chip_eoi_parent(struct irq_data *data);
+extern int irq_chip_set_affinity_parent(struct irq_data *data,
+					const struct cpumask *dest,
+					bool force);
 extern int irq_chip_retrigger_hierarchy(struct irq_data *data);
 #endif
 
diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c
index 12f3e72..fe53575 100644
--- a/kernel/irq/chip.c
+++ b/kernel/irq/chip.c
@@ -858,6 +858,34 @@ void irq_chip_ack_parent(struct irq_data *data)
 	data->chip->irq_ack(data);
 }
 
+void irq_chip_mask_parent(struct irq_data *data)
+{
+	data = data->parent_data;
+	data->chip->irq_mask(data);
+}
+
+void irq_chip_unmask_parent(struct irq_data *data)
+{
+	data = data->parent_data;
+	data->chip->irq_unmask(data);
+}
+
+void irq_chip_eoi_parent(struct irq_data *data)
+{
+	data = data->parent_data;
+	data->chip->irq_eoi(data);
+}
+
+int irq_chip_set_affinity_parent(struct irq_data *data,
+				 const struct cpumask *dest, bool force)
+{
+	data = data->parent_data;
+	if (data->chip->irq_set_affinity)
+		return data->chip->irq_set_affinity(data, dest, force);
+
+	return -ENOSYS;
+}
+
 int irq_chip_retrigger_hierarchy(struct irq_data *data)
 {
 	for (data = data->parent_data; data; data = data->parent_data)
-- 
1.8.1.1.dirty

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